Accelerated Depreciation on Solar Panel for Businesses in India

Installing a Solar Panel for Businesses can reduce more than electricity costs. For an eligible business that owns its solar power-generating system, depreciation can also influence taxable business income and therefore improve the overall economics of the investment. This is particularly relevant for factories, warehouses, hospitals, hotels, offices, educational institutions and other commercial or industrial facilities considering a CAPEX solar installation.

As of 2026, the Income Tax Department’s published depreciation schedule lists solar power generating systems within renewable-energy devices at a 40% depreciation rate. Solar photovoltaic modules and panels for specified applications also appear within the renewable-energy category. However, saying that a business simply receives a “40% tax saving” would be incorrect.

Depreciation is a deduction against taxable business income; it is not a 40% cash rebate on the solar project’s purchase price. The actual tax impact depends on factors such as the depreciable value, applicable tax regime/rate, date the asset is put to use, ownership structure and the business’s taxable position.

Tax note: This article is intended for general solar-investment education. Tax treatment depends on the facts of each business. Businesses should have their chartered accountant or tax adviser confirm the applicable treatment before using depreciation benefits in an investment decision.

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Quick Answer: What Is Accelerated Depreciation on Solar?

Accelerated depreciation allows an eligible business that owns qualifying solar assets to claim depreciation at the applicable prescribed rate, reducing the asset’s written-down value and potentially reducing taxable business income.

The current Income Tax Department schedule lists solar power generating systems at 40% under renewable-energy devices.

Here’s the concept at a glance:

Parameter	Solar Business Investment
Asset	Solar power generating system
Published Depreciation Rate	40%
Primary Beneficiary	Eligible asset-owning business
Benefit Type	Depreciation deduction
Reduces	Taxable business income, subject to tax rules
Direct Government Cash Subsidy?	No
Asset Ownership Important?	Yes
Relevant to CAPEX Solar?	Yes
Relevant to Developer-Owned PPA?	Generally not to the electricity buyer as asset owner
Professional Tax Review	Recommended

The distinction between depreciation rate and tax saving is extremely important and will be demonstrated with examples below.

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What Is Accelerated Depreciation?

Depreciation recognizes that a capital asset loses value over its useful economic life. For income-tax purposes, eligible businesses may claim depreciation according to prescribed asset classifications and rates.

When a company purchases machinery, it generally does not treat the entire capital expenditure as a normal operating expense in the year of purchase.

Instead, the asset is capitalized and depreciation is claimed according to applicable tax rules.

Renewable-energy equipment has historically received a comparatively higher prescribed depreciation rate. The official depreciation table currently places several renewable-energy devices, including solar power generating systems, in the 40% block.

This can improve the early-year economics of purchasing a Solar Panel for Businesses compared with analysing electricity savings alone.

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Is the Solar Depreciation Rate 40% in 2026?

Yes—the Income Tax Department’s current published depreciation schedule lists solar power generating systems under renewable-energy devices at 40%.

The relevant category includes renewable-energy devices such as:

• solar collectors;
• solar water-heating systems;
• solar refrigeration systems;
• solar power generating systems;
• solar pumps; and
• solar photovoltaic modules and panels for specified applications.

The official Income Tax Department source should be used as the primary reference rather than relying on an EPC company’s marketing claim.

Credible External Source

Income Tax Department — New Appendix I Depreciation Schedule

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Does 40% Depreciation Mean You Save 40% in Tax?

No. This is one of the most important misconceptions surrounding commercial solar tax benefits.

A 40% depreciation rate does not mean:

₹50 lakh solar project × 40% = ₹20 lakh cash refund.

Instead, ₹20 lakh would represent the depreciation deduction in a simplified full-rate example. The resulting tax impact depends on the business’s applicable effective tax rate and other tax circumstances.

Simplified Example

Assume an eligible company purchases and puts to use a qualifying solar asset costing: ₹50,00,000
For a simplified illustration using the full 40% depreciation rate: ₹50,00,000 × 40% = ₹20,00,000 depreciation
Suppose, purely for illustration, that the relevant effective tax rate used in the financial model is 25%.

Potential tax effect: ₹20,00,000 × 25% = ₹5,00,000

Therefore:

Calculation	Amount
Illustrative Solar Asset Cost	₹50,00,000
Assumed Depreciation Rate	40%
Illustrative Depreciation Deduction	₹20,00,000
Assumed Effective Tax Rate	25%
Illustrative Tax Effect	₹5,00,000

The ₹5 lakh is an illustrative tax effect—not a guaranteed tax credit or government payment.

Actual results can differ materially.

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The 180-Day Rule: An Important Solar Tax Consideration

Businesses also need to consider when the solar asset is actually put to use. Simply purchasing equipment before the end of the financial year does not necessarily produce the same depreciation outcome as commissioning it earlier.

Under depreciation rules, where an eligible asset is acquired during the year and put to use for less than 180 days, the depreciation available for that year can generally be restricted to 50% of the amount otherwise allowable, subject to the applicable law and facts.

This makes the commissioning date important.

Simplified comparison

Assume:

• Solar asset = ₹50 lakh
• Applicable rate = 40%

If the full prescribed rate is available in the relevant year: ₹50 lakh × 40% = ₹20 lakh

If the applicable first-year depreciation is restricted to 50% of that amount because of the period of use: ₹20 lakh × 50% = ₹10 lakh

Scenario	Illustrative Depreciation
Full 40% rate assumed available	₹20 lakh
50% of otherwise allowable depreciation	₹10 lakh

This does not necessarily eliminate the remaining depreciation benefit permanently; it changes the timing of deductions through the written-down-value mechanism.

Expert Note: Businesses planning year-end solar installations should coordinate commissioning documentation with their EPC provider and tax adviser rather than assuming that issuing a purchase order or making payment is sufficient.

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How Accelerated Depreciation Works: Simple Example

Let’s consider a simplified ₹1 crore Solar Panel for Businesses investment.

Assumptions

• Initial depreciable value: ₹1,00,00,000
• Depreciation rate: 40%
• Full rate assumed available
• WDV method
• No additions, disposals or other adjustments

Year 1

Opening WDV: ₹1,00,00,000
Depreciation: ₹1,00,00,000 × 40% = ₹40,00,000
Closing WDV: = ₹60,00,000

Year 2

Opening WDV: ₹60,00,000
Depreciation: ₹60,00,000 × 40% = ₹24,00,000
Closing WDV: = ₹36,00,000

Year 3

Depreciation: ₹36,00,000 × 40% = ₹14,40,000
Closing WDV: = ₹21,60,000

Three-Year Illustration

Year	Opening WDV	Depreciation @ 40%	Closing WDV
Year 1	₹1,00,00,000	₹40,00,000	₹60,00,000
Year 2	₹60,00,000	₹24,00,000	₹36,00,000
Year 3	₹36,00,000	₹14,40,000	₹21,60,000

After three years, this simplified model has recognized:

₹78.40 lakh

of cumulative depreciation.

The remaining WDV is:

₹21.60 lakh

This demonstrates why the timing of depreciation can materially affect the financial analysis of a business-owned solar plant.

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Solar Depreciation Does Not Mean the Asset Loses 40% Performance

Another misconception is that tax depreciation represents the physical degradation of solar panels.

It does not.

Tax depreciation and technical degradation are completely different concepts.

Tax Depreciation	Solar Panel Degradation
Accounting/tax concept	Physical performance concept
Applied to asset value	Applied to electricity output
Prescribed by tax rules	Determined by technology
Can be 40% for qualifying solar block	Typically far lower annually
Affects taxable income	Affects solar generation

A solar plant can therefore have a significantly reduced written-down tax value while continuing to generate substantial electricity.

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Who Can Potentially Benefit Most?

A Solar Panel for Businesses combined with depreciation can be particularly attractive for organisations that:

• Own the solar asset;
• Have taxable business income;
• Have significant daytime electricity consumption;
• Expect to operate from the facility long term;
• Can deploy or finance CAPEX;
• Want to reduce grid electricity purchases;
• Seek long-term energy-cost stability.

Typical candidates include:

Manufacturing Plants

Factories generally have strong daytime loads, which can support high solar self-consumption.

Warehouses

Large uninterrupted roofs can provide substantial installation area.

Hotels

Air conditioning, kitchens, laundry and other daytime loads create considerable electricity demand.

Hospitals

Hospitals operate energy-intensive equipment and HVAC systems throughout the day.

Commercial Offices

Office consumption frequently overlaps well with daytime solar production.

Educational Institutions

Schools, universities and campuses often have large roof areas and substantial daytime electricity usage.

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CAPEX vs PPA: Who Claims the Solar Depreciation?

Ownership is critical when evaluating depreciation.

Under a conventional CAPEX installation:

Business buys solar plant → business owns qualifying asset → business evaluates depreciation claim.

Under a developer-owned PPA/RESCO arrangement:

Developer owns plant → business purchases electricity → asset depreciation generally sits with the asset owner rather than the electricity purchaser.

Feature	CAPEX	Developer-Owned PPA
Business owns plant	Yes	No
Upfront business CAPEX	High	Low
Business pays for solar electricity	No separate PPA tariff	Yes
O&M	Business/EPC	Usually developer
Business evaluates asset depreciation	Yes	Generally no
Long-term ownership	Business	Contract-dependent

This is why tax depreciation should be considered when comparing CAPEX with the Power Purchase Agreement model discussed in the previous Solar Ace guide.

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Why Depreciation Can Improve Solar ROI

A commercial solar investment can potentially generate value through several channels simultaneously.

• 1. Electricity Savings – Every unit generated and self-consumed can replace electricity that otherwise would have been purchased from the grid.
• 2. Depreciation – Eligible depreciation can reduce taxable business income, subject to the applicable tax framework.
• 3. Protection Against Tariff Increases- Once the system is owned, solar generation can reduce exposure to future grid electricity price increases.
• 4. Long Asset Life Quality solar modules can continue producing electricity for decades, although output gradually declines over time.

This means the financial case should not be calculated as: Solar Cost ÷ Electricity Savings alone.
A better business model evaluates: CAPEX + financing + tax effects + electricity savings + O&M + degradation + inverter replacement + tariff escalation + residual value. That produces a much more credible investment case.

Who Is Eligible to Claim Depreciation on a Solar Power System?

The 40% rate does not automatically translate into a tax benefit for every organisation installing solar. Ownership, use of the asset for business, the applicable tax provisions, and the taxpayer’s circumstances all matter.

At a practical level, businesses evaluating depreciation should establish four things first:

1. The business owns the qualifying solar asset.
2. The asset is used for the purposes of the business or profession.
3. The solar system has actually been put to use.
4. The asset is classified correctly within the applicable depreciation block.

This is why depreciation can materially affect the economics of a CAPEX Solar Panel for Businesses, while a customer purchasing electricity under a developer-owned PPA generally does not claim depreciation on an asset it does not own.

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How Does the 180-Day Rule Affect Solar Depreciation?

Commissioning date can materially change the first-year deduction. If an eligible asset is put to use for less than 180 days in the relevant previous year, the depreciation otherwise allowable is generally restricted to 50% for that year, subject to the applicable provisions.

Consider a ₹1 crore qualifying solar project.

Scenario A: Full 40% depreciation assumed available

₹1 crore × 40 = ₹40 lakh

Scenario B: Asset subject to the less-than-180-day restriction

₹1 crore × 40% × 50% = ₹20 lakh

That creates a substantial difference in the timing of depreciation.

Project Cost	Full 40% Illustration	50% of 40% Illustration
₹25 lakh	₹10 lakh	₹5 lakh
₹50 lakh	₹20 lakh	₹10 lakh
₹1 crore	₹40 lakh	₹20 lakh
₹5 crore	₹2 crore	₹1 crore

Common Mistake

Do not confuse:

Purchase date → Installation date → Commissioning date → Put-to-use date

for tax planning purposes.

A purchase order dated in March does not, by itself, demonstrate that the solar power-generating system was put to use during that financial year.

Businesses should retain appropriate commissioning and project documentation and confirm the tax treatment with their tax adviser.

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Solar Depreciation Examples by Project Size

Seeing the calculation across different commercial project sizes makes the impact easier to understand. The examples below use a 40% depreciation assumption and are deliberately separated from the actual tax effect.

₹25 Lakh Solar Project

Full-rate illustrative depreciation: ₹25,00,000 × 40% = ₹10,00,000
Remaining WDV: ₹25,00,000 − ₹10,00,000 = ₹15,00,000
If we use an illustrative effective tax rate of 25% solely to demonstrate the concept: ₹10,00,000 × 25% = ₹2,50,000 illustrative Year-1 tax effect

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₹50 Lakh Solar Project

Depreciation: ₹50,00,000 × 40% = ₹20,00,000
Closing WDV: = ₹30,00,000
At the same hypothetical 25% tax rate: ₹20,00,000 × 25% = ₹5,00,000 illustrative tax effect

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₹1 Crore Solar Project

Depreciation: ₹1,00,00,000 × 40% = ₹40,00,000
Closing WDV: = ₹60,00,000
Illustrative tax effect at 25%: ₹40,00,000 × 25% = ₹10,00,000

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₹5 Crore Solar Project

Depreciation: ₹5,00,00,000 × 40% = ₹2,00,00,000
Closing WDV: = ₹3,00,00,000
Illustrative tax effect at 25%: ₹2,00,00,000 × 25% = ₹50,00,000

Comparison

Solar Investment	Illustrative 40% Depreciation	Closing WDV	Illustrative Tax Effect @ 25%
₹25 lakh	₹10 lakh	₹15 lakh	₹2.5 lakh
₹50 lakh	₹20 lakh	₹30 lakh	₹5 lakh
₹1 crore	₹40 lakh	₹60 lakh	₹10 lakh
₹5 crore	₹2 crore	₹3 crore	₹50 lakh

Important: The final column is not a promised tax saving. It simply multiplies the illustrative depreciation deduction by an assumed 25% effective tax rate to demonstrate the concept.

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How Depreciation Changes Over Five Years

Under the WDV approach, the 40% rate applies to the remaining written-down value rather than repeatedly applying to the original project cost. Consequently, the depreciation amount declines each year.

Consider the ₹1 crore example again.

Year	Opening WDV	Depreciation @ 40%	Closing WDV
1	₹1,00,00,000	₹40,00,000	₹60,00,000
2	₹60,00,000	₹24,00,000	₹36,00,000
3	₹36,00,000	₹14,40,000	₹21,60,000
4	₹21,60,000	₹8,64,000	₹12,96,000
5	₹12,96,000	₹5,18,400	₹7,77,600

Cumulative depreciation after five years in this simplified example: ₹92,22,400
Remaining WDV: ₹7,77,600
The tax deduction is therefore front-loaded relative to an asset category carrying a much lower depreciation rate.

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Interactive Solar Depreciation Calculator

This is worth embedding immediately after the five-year example. A CFO, business owner, or accountant can change the project value and illustrative tax rate instead of relying on a generic example.

Can You Claim Depreciation if the Solar Project Is Financed?

Paying for solar through a business loan does not necessarily mean the lender becomes the owner of the solar generating asset. This distinction is important because financing and ownership are separate questions.

Consider two simplified structures.

Business loan / financed CAPEX

Business acquires the solar plant → business owns the asset → lender finances the purchase.

Developer-owned PPA

Developer acquires and owns solar plant → business purchases electricity. Therefore, a financed CAPEX project may still be evaluated for depreciation by the asset-owning business, subject to the applicable tax rules. The business must separately account for:

• Asset depreciation;
• Financing cost;
• Loan principal;
• Electricity savings;
• Applicable interest treatment.

This can make debt-financed CAPEX an interesting alternative to both an all-cash installation and a developer-owned PPA.

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Solar CAPEX vs PPA After Considering Depreciation

Businesses comparing CAPEX and PPA should include the tax implications of ownership in their financial model. Comparing only “₹4 PPA power versus ₹9 grid power” can overlook a significant element of CAPEX economics.

Factor	Business-Owned CAPEX	Developer-Owned PPA
Initial Business Investment	High	Low
Asset Owner	Business	Developer
Electricity Generated	Owned by business	Purchased under contract
Solar PPA Payment	None	Yes
O&M	Business/EPC arrangement	Usually developer
Depreciation Evaluated by Business	Yes	Generally no
Financing Interest	Possible	Embedded in developer economics
Contract Exit Exposure	Low	PPA dependent
Lifetime Savings Potential	Potentially higher	Usually lower than ownership
Capital Preservation	Lower	Higher

Expert Tip

Ask for three financial models before choosing commercial solar:

• Model A — Cash CAPEX
• Model B — Debt-financed CAPEX
• Model C — Solar PPA

Compare all three using the same:

• System size;
• Annual generation;
• Degradation;
• Electricity tariff;
• Tariff escalation;
• Project life;
• Maintenance assumptions.

Then add the applicable financing and tax effects to each model. That produces a much more defensible board-level comparison.

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Does GST Affect the Solar Depreciation Calculation?

GST and input-tax-credit treatment can affect the capitalised cost of an asset and therefore should not be ignored when preparing the depreciation model.

The exact treatment depends on:

• Nature of the transaction;
• Eligibility for input tax credit;
• Invoicing structure;
• Accounting treatment;
• Applicable GST provisions.

Consequently, a business should not automatically calculate depreciation on the headline GST-inclusive EPC quotation. For example, if eligible input tax credit is available and therefore does not form part of the asset’s actual cost for income-tax purposes, the depreciable base may differ from the gross invoice amount. This is an area where the EPC quotation, GST treatment and income-tax asset schedule need to align.

Tax Review Point: Have your accountant establish the correct capitalised/depreciable project cost before modelling the 40% rate.

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Can Businesses Get Both Solar Subsidy and Depreciation?

Commercial solar should not be evaluated using the residential rooftop subsidy assumptions commonly advertised to homeowners. The PM Surya Ghar: Muft Bijli Yojana primarily targets the residential sector. Businesses planning a commercial or industrial Solar Panel for Businesses should therefore not automatically deduct a residential subsidy from their project cost. Commercial project economics are instead typically built around factors such as:

• Electricity-cost savings;
• Depreciation where applicable;
• Financing;
• Open-access economics where relevant;
• Renewable-energy objectives.

This distinction is important because an unrealistic subsidy assumption can artificially shorten the projected payback period.

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Electricity Savings + Depreciation: Combined Illustration

Depreciation is only one component of the investment case. The primary economic engine of a commercial solar system remains the electricity it generates over its operating life.

Consider this simplified project:

Parameter	Assumption
Solar Capacity	500 kW
Project Cost	₹2.5 crore
Annual Generation	7,50,000 kWh
Avoided Grid Cost	₹9/kWh
Year-1 Gross Energy Value	₹67.5 lakh
Illustrative Depreciation Rate	40%
Year-1 Depreciation*	₹1 crore
Illustrative Tax Rate	25%
Illustrative Year-1 Tax Effect*	₹25 lakh

*Assumes the full 40% rate for illustration and ignores other tax/accounting adjustments.

The gross value of solar electricity: 7,50,000 × ₹9 = ₹67,50,000
Illustrative depreciation: ₹2.5 crore × 40% = ₹1 crore
Illustrative tax effect: ₹1 crore × 25% = ₹25 lakh These should not simply be described as ₹92.5 lakh of guaranteed “savings.” Why? Because a credible investment model must also consider:

• O&M;
• financing cost;
• taxes;
• degradation;
• downtime;
• replacement expenditure;
• actual self-consumption;
• tariff structure;
• treatment of depreciation;
• the company’s actual taxable position.

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Graph: Why Depreciation Is Front-Loaded

For this article, a declining WDV graph is more informative than a generic ROI graph because it directly teaches the keyword’s tax concept.

How Accelerated Depreciation Can Affect Solar Payback

A tax deduction can improve early project cash flow, but it should not be used to artificially claim an unrealistically short solar payback period.

Suppose:

• Project investment = ₹1 crore
• Year-1 gross electricity saving = ₹18 lakh
• Illustrative Year-1 depreciation = ₹40 lakh
• Illustrative effective tax rate = 25%

Potential Year-1 tax effect: ₹40 lakh × 25% = ₹10 lakh

The project therefore has:

• ₹18 lakh of illustrative energy savings; plus
• a ₹10 lakh illustrative Year-1 tax effect.

But the two benefits behave differently. Electricity savings can continue throughout the operating life of the plant. The depreciation deduction is concentrated more heavily in earlier years as the WDV declines. A professional solar ROI model should therefore calculate annual cash flows separately rather than adding every benefit together and dividing project cost by the total.

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Additional Depreciation: Don’t Automatically Add Another 20%

This is an area where commercial solar articles frequently become misleading. Businesses may encounter online calculations showing: 40% normal depreciation + 20% additional depreciation = 60%.

That should not be presented as a universal solar benefit. Additional depreciation is governed separately and depends on the applicable provisions, taxpayer, business activity, asset and other conditions. Its availability has also been affected by the tax regime selected by certain companies. Therefore, Solar Ace should not advertise a blanket 60% accelerated depreciation benefit.

A safer and more accurate approach is:

The official depreciation schedule currently lists qualifying solar power generating systems at 40%. Any additional depreciation should be separately evaluated by the company’s tax adviser based on the applicable provisions and tax regime.

This makes the article more trustworthy than simply reproducing aggressive tax-saving claims from competing solar websites.

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Common Tax and Financial Modelling Mistakes

Solar ROI projections can look exceptionally attractive when tax assumptions are handled incorrectly. Businesses should review the following mistakes before approving an investment proposal.

Common Mistake	Better Approach
Calling 40% depreciation a 40% tax saving	Calculate the deduction and tax effect separately
Ignoring the put-to-use date	Verify commissioning timing
Assuming 40% on original cost every year	Use the applicable WDV approach
Automatically adding 20% additional depreciation	Check separate eligibility
Using residential subsidy in C&I calculation	Verify scheme eligibility
Ignoring GST/ITC impact on asset cost	Confirm capitalised cost
Assuming PPA buyer claims asset depreciation	Identify legal asset owner
Ignoring taxable-income position	Have tax adviser model actual utilisation
Adding depreciation directly to revenue savings	Build annual after-tax cash flows
Using tax benefits as the only reason to buy solar	Evaluate the project’s standalone energy economics

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Should a Business Install Solar Only for Accelerated Depreciation?

No. A Solar Panel for Businesses should make economic and operational sense even before aggressive tax assumptions are introduced. Depreciation should be treated as an additional financial consideration, not the sole justification for the project. A strong commercial solar project normally starts with: High daytime electricity demand + suitable installation space + strong solar generation + expensive grid electricity. Tax treatment can then improve the investment economics. If the project only appears viable after optimistic tax assumptions are inserted, the business should review the proposal more carefully.

How to Calculate the True ROI of Solar Panel for Businesses

A reliable ROI model for Solar Panel for Businesses should combine energy savings, tax effects, financing costs and long-term operating expenses rather than relying on a single headline payback figure.

The basic framework is:

Annual Solar Benefit = Avoided Electricity Cost + Applicable Tax Effect − O&M − Financing Cost − Other Project Costs

However, each component behaves differently over time.

For example:

• electricity savings may increase as grid tariffs rise;
• depreciation generally declines as WDV falls;
• solar generation may reduce gradually due to module degradation;
• loan interest declines as principal is repaid;
• inverter replacement or major maintenance may occur later in the project life.

That is why a year-by-year cash-flow model is more useful than a simple cost-divided-by-savings calculation.

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25-Year Solar Business Case: Simplified Example

Consider an illustrative commercial project with the following assumptions:

Parameter	Assumption
Solar Capacity	500 kW
Project Cost	₹2.5 crore
Year-1 Generation	7,50,000 kWh
Avoided Grid Tariff	₹9/kWh
Grid Tariff Escalation	3% annually
Solar Degradation	0.5% annually
O&M	Excluded for simplified illustration
Depreciation Rate	40% WDV
Tax Rate	Illustrative 25%
Project Life	25 years

Year-1 Electricity Value

7,50,000 kWh × ₹9/kWh = ₹67.5 lakh

Illustrative Year-1 Depreciation

₹2.5 crore × 40% = ₹1 crore

Illustrative Tax Effect

₹1 crore × 25% = ₹25 lakh

The project therefore may deliver two different financial effects in the first year: Energy-cost reduction and a depreciation-linked tax effect.

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Why Solar Savings Can Continue After Depreciation Falls

One of the strongest characteristics of a business-owned solar system is that the electricity-generating asset can continue delivering energy savings long after the largest depreciation deductions have already been claimed.

For example:

Early Years

The project may benefit from:

• high depreciation deduction;
• grid electricity savings;
• financing-related effects.

Middle Years

Depreciation becomes smaller, while:

• electricity generation continues;
• grid tariff exposure remains lower;
• outstanding debt may decline.

Later Years

The asset may have a very low tax WDV but can still produce substantial electricity. This is why the tax value of the asset should not be confused with its economic usefulness.

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Accelerated Depreciation vs Normal Depreciation

The phrase accelerated depreciation is commonly used because qualifying renewable-energy equipment can fall under a higher depreciation rate than many conventional plant and machinery categories. The current official depreciation schedule lists solar power generating systems at 40% WDV. To understand the timing benefit, compare two hypothetical asset categories:

Example: ₹1 Crore Asset

Year	40% WDV Depreciation	Hypothetical 15% WDV
Year 1	₹40.00 lakh	₹15.00 lakh
Year 2	₹24.00 lakh	₹12.75 lakh
Year 3	₹14.40 lakh	₹10.84 lakh
Year 4	₹8.64 lakh	₹9.21 lakh
Year 5	₹5.18 lakh	₹7.83 lakh

The total depreciation is not magically created. The main advantage is the timing. A larger portion of the deduction is recognized earlier under the higher WDV rate. This can improve early project cash flow for an eligible taxpayer.

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Does Accelerated Depreciation Increase the Total Lifetime Deduction?

Not necessarily. This is another important distinction. Depreciation primarily changes when the cost of the depreciable asset is recognized for tax purposes. A higher WDV rate generally allows a greater proportion to be recognized earlier, but businesses should not assume that accelerated depreciation creates an unlimited additional deduction over the asset’s life. The financial value comes from the timing of tax deductions and the business’s ability to utilise those deductions.

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What If the Business Has Low or No Taxable Profit?

A high depreciation deduction may have less immediate cash-flow value if the business does not have sufficient taxable income against which it can be effectively utilised.

For example:

Company A

• strong taxable profits;
• qualifying solar asset;
• depreciation claim available.

The deduction may provide a meaningful current-year tax effect.

Company B

• operating losses;
• limited taxable income.

The same depreciation amount may not produce the same immediate cash benefit. This is why two companies purchasing the same Solar Panel for Businesses can experience very different after-tax economics. Businesses should therefore ask: “Can we actually utilise the depreciation benefit?” rather than simply: “What is the depreciation rate?”

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Important 2026 Tax Law Context

Businesses should also be aware that India’s income-tax framework changed in 2026. The Income Tax Department states that the Income-tax Act, 2025 applies from 1 April 2026, while matters relating to earlier tax years continue under the previous legislation. The current notified depreciation schedule continues to list qualifying solar power generating systems within renewable-energy devices at 40% WDV. This is particularly important for a 2026 article because older blogs may still refer only to provisions and section numbering under the Income-tax Act, 1961.

Expert Insight

When reviewing tax guidance online, check whether the article is discussing:

• a tax year before 1 April 2026; or
• the new framework applying from 1 April 2026.

The underlying commercial principle may be similar, but the applicable statutory references and filing framework should be checked for the relevant tax year.

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Additional Depreciation Requires Separate Review

Businesses should not automatically assume that the normal 40% solar depreciation rate can simply be combined with additional depreciation. Official Income Tax Department filing guidance has specifically restricted additional depreciation under certain concessional tax regimes, including sections such as 115BAA under the earlier framework. Therefore, claims such as: “Solar gives 60% depreciation in the first year” should never be used as a universal marketing statement.

A better statement is:

Qualifying solar power-generating systems are currently listed at 40% WDV depreciation. Any additional depreciation requires separate eligibility and tax-regime analysis.

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Accelerated Depreciation vs Solar Subsidy

These are completely different benefits.

Accelerated Depreciation	Solar Subsidy
Tax deduction	Government financial support
Depends on tax rules	Depends on scheme eligibility
Generally linked to asset ownership	Scheme-specific
Reduces taxable income	May reduce effective project cost
Business-specific tax effect	Subsidy amount may be predefined
Not a cash rebate equal to 40%	Can involve direct financial assistance

For most commercial and industrial projects, businesses should not assume that residential rooftop subsidy schemes apply.

A Solar Panel for Businesses should therefore be evaluated primarily on commercial electricity savings and applicable tax treatment rather than consumer subsidy assumptions.

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Documents Businesses Should Keep for Solar Depreciation

Documentation matters because the depreciation claim depends not only on purchasing the equipment but also on ownership, capitalisation and put-to-use status.

A business should typically maintain appropriate records such as:

• EPC agreement;
• purchase invoices;
• payment records;
• asset register entry;
• commissioning certificate;
• installation completion documentation;
• meter commissioning details where relevant;
• plant photographs;
• warranty documentation;
• electrical approvals;
• accounting capitalisation record;
• financing documents if the project is loan funded.

The exact records required should be confirmed with the company’s accountant or auditor.

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CFO Checklist Before Approving Commercial Solar

This section is particularly useful for decision-makers comparing multiple EPC or financing proposals.

Commercial

• What is the total installed project cost?
• Is GST treatment clearly separated?
• What is the expected annual electricity generation?
• What grid tariff is actually being avoided?
• Has tariff escalation been modelled conservatively?

Tax

• Does the business own the solar asset?
• What asset value will be capitalised?
• What depreciation rate is applicable?
• When will the asset be put to use?
• Does the first-year usage period affect the depreciation amount?
• Can the business utilise the deduction?
• Has any additional-depreciation assumption been independently verified?

Technical

• Is the generation estimate based on the actual location?
• Has shading been considered?
• Has roof/structural feasibility been checked?
• What panel and inverter warranties apply?
• What degradation assumptions are being used?

Financial

• Is financing included?
• Are O&M expenses included?
• Has inverter replacement been considered?
• Is the ROI based on annual cash flows?
• Is the tax benefit separated from energy savings?

Strategic

• Does CAPEX make more sense than a PPA?
• How long will the business occupy the property?
• Are expansion plans likely to affect the installation?
• Does the project support the company’s renewable-energy objectives?

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CAPEX, Loan or PPA: Which Model Should a Business Choose?

There is no universally superior financing model.

The right structure depends on capital availability, tax position, electricity consumption and long-term business strategy.

Choose CAPEX When

CAPEX may be attractive if the business:

• has available capital;
• wants to own the solar asset;
• can use applicable depreciation benefits;
• expects to remain at the location long term;
• wants greater control over the asset;
• prioritises maximum lifetime savings.

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Consider Loan-Financed CAPEX When

Debt-funded solar may suit a business that:

• wants asset ownership;
• wants to preserve some working capital;
• can access suitable financing;
• expects electricity savings to support repayment;
• wants to evaluate depreciation as the asset owner.

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Consider a PPA When

A Power Purchase Agreement may suit a business that:

• wants minimal upfront CAPEX;
• prefers outsourcing project ownership;
• wants developer-managed O&M;
• prefers paying per unit of solar electricity;
• values capital preservation more than asset ownership.

In a developer-owned PPA, the electricity buyer generally does not own the solar asset and therefore should not assume it can claim depreciation on that asset.

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Solar Panel for Businesses: Decision Matrix

Business Priority	CAPEX	Loan CAPEX	PPA
Lowest Upfront Investment	★	★★★	★★★★★
Asset Ownership	★★★★★	★★★★★	★
Potential Lifetime Savings	★★★★★	★★★★	★★★
Capital Preservation	★	★★★	★★★★★
Depreciation Evaluation	★★★★★	★★★★★	★
O&M Outsourcing	★★★	★★★	★★★★★
Financial Simplicity	★★★★	★★	★★★★
Long-Term Flexibility	★★★★	★★★	Contract dependent

The matrix should be treated as a conceptual comparison rather than a universal ranking.

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How to Evaluate a Solar Proposal Before Considering Tax Benefits

A credible solar quotation should first prove the project’s electricity economics. Ask the EPC company to provide:

• 1. System Capacity Example: 500 kW
• 2. Expected Annual Generation: Example: 7.5 lakh kWh
• 3. Current Electricity Cost: Use the relevant avoidable energy cost, not an inflated generic rate.
• 4. Solar Generation Value: Annual generation × applicable avoided electricity cost
• 5. O&M Assumptions: Include realistic annual operating costs.
• 6. Generation Degradation: Do not assume identical output for 25 years.
• 7. Major Replacement Costs : Consider likely inverter or equipment replacement where relevant.
• 8. Financing Cost :If debt is used, model interest and repayment.
• 9. Tax Effects: Only after the project works operationally should depreciation be added to the financial model. This order prevents an unsuitable project from appearing attractive merely because of a tax deduction.

FAQs About Solar Panel for Businesses and Depreciation

Conclusion: Is Accelerated Depreciation a Major Benefit of Business Solar?

For eligible businesses purchasing and owning a qualifying solar generating asset, depreciation can be an important part of commercial solar economics. The current official depreciation schedule lists solar power generating systems at 40% WDV, which can front-load a meaningful portion of the depreciation deduction.

However, the key points businesses should remember are simple:

• 40% depreciation is not a 40% tax refund. The tax effect depends on the company’s circumstances.
• Ownership matters. A business-owned CAPEX project and a developer-owned PPA do not provide the electricity purchaser with the same asset-level tax position.
• Timing matters. The date on which the solar system is put to use can affect the first year’s depreciation.
• Additional depreciation should not be assumed. It requires separate eligibility analysis, particularly where concessional tax regimes are involved.Most importantly, a Solar Panel for Businesses should be justified first by its ability to generate reliable electricity and reduce long-term energy costs.

When sound solar economics are combined with appropriate financing and correctly applied tax treatment, commercial solar can become a powerful long-term capital investment rather than simply an electricity-saving project. For businesses evaluating rooftop solar in Gujarat or Maharashtra, the next practical step is to analyse actual electricity bills, daytime consumption, installation area and expected generation before comparing CAPEX, financed CAPEX and PPA structures.