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Get a Free Quote5-year accelerated depreciation + 20% first-year bonus + Section 48 ITC stacking + PA 8.99% CNIT deduction. 2026 is the last year with any bonus depreciation — it drops to 0% in 2027.
MACRS Schedule
5 Years
vs. 25+ year panel life
2026 Bonus
20%
First-year extra deduction
PA CNIT Rate
8.99%
State-level MACRS savings
ITC Stacking
30-70%
Section 48/48E credit
The Modified Accelerated Cost Recovery System (MACRS) is a federal tax depreciation method that allows businesses to recover the cost of capital assets through annual deductions. Commercial solar energy systems qualify for 5-year MACRS depreciation — meaning the IRS lets you write off the entire cost of a solar system over just 5 tax years, even though solar panels last 25-30+ years.
This is not a tax credit — it is a tax deduction that reduces your taxable income. The faster you deduct the cost, the sooner you reduce your tax bill and recover your investment. MACRS front-loads these deductions, with the largest percentages in Years 1 and 2.
For Pennsylvania businesses, MACRS is especially valuable because PA's 8.99% Corporate Net Income Tax (CNIT) rate stacks on top of the 21% federal rate, creating a combined 29.99% marginal rate for C-corporations. Commercial electric rates in PA range from $0.14-$0.16/kWh — lower than New England but still substantial enough to drive strong ROI when combined with tax benefits. A 200 kW system at $2.70/W is $540,000, and MACRS + ITC can recover over 40% of that cost in Year 1 alone.
Without MACRS, a business would depreciate solar panels over their useful life (25-39 years using straight-line depreciation), generating small annual deductions. MACRS compresses the entire deduction into 5 years, with most of the value concentrated in Years 1-3. This creates significantly larger deductions when they matter most — during the early years of system ownership when you are recovering your investment.
In addition to the standard 5-year MACRS schedule, commercial solar systems placed in service in 2026 qualify for 20% first-year bonus depreciation. This allows businesses to deduct an extra 20% of the adjusted depreciable basis in Year 1 — on top of the regular MACRS percentage.
2022
100%
Expired
2023
80%
Expired
2024
60%
Expired
2025
40%
Expired
2026
20%
Current
2027
0%
No Bonus
The Tax Cuts and Jobs Act (TCJA) established a phase-down from 100% bonus depreciation in 2022 to 0% by 2027. A system placed in service in 2026 gets 20% bonus. A system placed in service in 2027 gets nothing — only the standard 5-year MACRS schedule. For a $540,000 PA commercial system, this timing difference means approximately $27,531 more in Year 1 tax savings by acting in 2026 versus 2027.
The MACRS 5-year property class uses the 200% declining balance method switching to straight-line in the later years. With the 2026 bonus, Year 1 captures 36% of the depreciable basis — nearly double the standard rate.
| Year | Standard MACRS | With 20% Bonus (2026) | On $459K Basis* |
|---|---|---|---|
| Year 1 | 20.00% | 36.00% | $165,240 |
| Year 2 | 32.00% | 25.60% | $117,504 |
| Year 3 | 19.20% | 15.36% | $70,502 |
| Year 4 | 11.52% | 9.22% | $42,320 |
| Year 5 | 11.52% | 9.22% | $42,320 |
| Year 6 | 5.76% | 4.60% | $21,114 |
| Total | 100% | 100% | $459,000 |
* Example: $540,000 system with 30% ITC. Depreciable basis = $540,000 - ($162,000 x 50%) = $459,000
Businesses that own their commercial solar system can claim both the Section 48/48E Investment Tax Credit (ITC) and MACRS depreciation. The key interaction: the depreciable basis must be reduced by 50% of the ITC claimed. Here is the step-by-step calculation for a PA business:
The ITC is a dollar-for-dollar federal tax credit. The base rate is 30% for projects meeting prevailing wage + apprenticeship requirements. Bonus adders can push this to 40%, 50%, or up to 70%. PA 6% sales tax is included in the eligible basis.
$540,000 system + $32,400 sales tax = $572,400 x 30% = $171,720 ITC
Reduce the total system cost (including PA sales tax) by 50% of the ITC claimed. This prevents "double-dipping" — you still depreciate most of the cost, but not the full ITC-covered portion.
$572,400 - ($171,720 x 50%) = $572,400 - $85,860 = $486,540 depreciable basis
Apply the 20% first-year bonus to the adjusted basis, then apply the standard Year 1 MACRS rate (20%) to the remaining balance. The result is a 36% effective Year 1 rate.
Bonus: $486,540 x 20% = $97,308. Regular MACRS: $389,232 x 20% = $77,846. Year 1 total: $175,154
Combine the ITC (dollar-for-dollar credit) with the depreciation deduction multiplied by your marginal tax rate. For a PA C-corp: 21% federal + 8.99% CNIT = 29.99%.
$171,720 ITC + ($175,154 x 29.99%) = $171,720 + $52,528 = $224,248 Year 1 tax benefit
| ITC Rate | Basis Reduction | Depreciable % of Cost | On $540K System |
|---|---|---|---|
| 30% | 15% | 85% | $459,000 |
| 40% | 20% | 80% | $432,000 |
| 50% | 25% | 75% | $405,000 |
| 60% | 30% | 70% | $378,000 |
| 70% | 35% | 65% | $351,000 |
Formula: Depreciable Basis = System Cost - (ITC Amount x 50%). Higher ITC = lower depreciable basis, but the ITC credit itself more than compensates.
Pennsylvania has distinct tax rules that affect commercial solar MACRS calculations. Understanding PA's corporate tax structure, sales tax treatment, and property tax implications is critical for accurate financial modeling.
PA CNIT rate has been declining from 9.99% and is scheduled to reach 4.99% by 2031. At 8.99% in 2026, acting now captures the higher deduction value.
Unlike Massachusetts (which decouples), Pennsylvania generally conforms to federal depreciation for CNIT purposes. This means:
This PA conformity makes MACRS more powerful than in states that decouple.
PA charges 6% sales tax on commercial solar equipment and installation. There is no solar sales tax exemption in PA, unlike neighboring NJ and MD.
On a $540,000 system: $32,400 in sales tax
Silver lining: PA sales tax IS included in the ITC-eligible basis, so you recover 30-70% of it via the ITC.
PA has no property tax exemption for solar. Solar equipment adds to the assessed value of commercial property — a key negative versus NJ, MA, and other neighboring states.
On a $540,000 system: ~$8,208/year increase (at ~1.52% avg PA effective rate)
Factor this into your ROI model. The increase may be partially offset by assessment depreciation over time.
Businesses can also elect Section 179 expensing for commercial solar, deducting up to $1,220,000 in the year placed in service (2026 limit). Section 179 is often used for systems under $1.2M where the business wants full Year 1 expensing rather than spreading deductions over 5 years. However, Section 179 has income limitations and phase-outs above $3,050,000 in total capital expenditures. Many PA businesses use a combination of Section 179 and MACRS to optimize their tax position. Consult your CPA or tax advisor.
The Section 48/48E commercial ITC starts at a 30% base rate and can stack up to 70% with bonus adders. Each adder has specific eligibility requirements. The ITC is available for projects that begin construction before July 4, 2026.
Base ITC: 30%
Prevailing wage + apprenticeship (projects > 1 MW)
Domestic Content (FEOC): +10%
US-manufactured steel, iron, and components. Deadline: July 4, 2026
Energy Community: +10%
Brownfield, closed coal mine/plant, or fossil fuel employment area. Many PA counties qualify due to coal mining history.
Low-Income: +10-20%
Located in low-income community or serving low-income beneficiaries
Maximum possible ITC: 30% + 10% + 10% + 20% = 70%. On a $540,000 system, that is $378,000 in tax credits.
Many Pennsylvania counties qualify for the +10% Energy Community bonus due to PA's coal mining history and legacy fossil fuel employment. Areas across western PA (Pittsburgh region), the anthracite coal region (Scranton, Wilkes-Barre), and various brownfield sites throughout the state are eligible. Check the IRS Energy Community Tax Credit Bonus map for your specific project location. Combined with domestic content, many PA projects can reach 50% ITC before low-income adders.
The residential solar tax credit (Section 25D) expired December 31, 2025. Homeowners who buy solar with cash or a loan receive $0 from the federal government. The Section 48/48E commercial ITC is a separate program that remains available for commercial projects (including third-party-owned residential systems under PPA/lease structures) that begin construction before July 4, 2026. The third-party system owner — not the installer — claims the ITC.
MACRS depreciation requires taxable income to be effective — the deduction is only valuable if you have income to offset. Different business structures benefit in different ways. PA's 8.99% CNIT rate makes the benefit especially strong for C-corporations.
Maximum benefit. C-corps deduct MACRS directly against corporate income. The 21% federal rate + 8.99% PA CNIT rate = up to 29.99% marginal tax savings on depreciable amount.
MACRS deductions pass through to shareholders on Schedule K-1. Each shareholder deducts their pro-rata share against personal income. PA personal income tax is a flat 3.07%.
Similar to S-corps. Depreciation allocations flow through to members per the operating agreement. Tax equity partnerships can optimize allocation.
MACRS deductions flow to Schedule C. Effective if the owner has significant business income. Limited by passive activity rules if solar is a separate activity.
Cannot use MACRS directly (no taxable income). Instead, use PPA/lease structures where the for-profit system owner claims MACRS + ITC and passes savings through lower electricity rates.
Let us walk through a real-world example of a 200 kW commercial solar system on a mid-size business rooftop in King of Prussia (PECO territory). This shows how MACRS, ITC, and PA-specific costs stack together.
System Size
200 kW
Cost ($2.70/W)
$540,000
Location
King of Prussia, PA
Entity Type
C-Corp
PA 6% Sales Tax (no exemption)
$540,000 x 6% = added to project cost
+$32,400
Section 48 ITC (30%)
$572,400 x 30% = dollar-for-dollar tax credit
$171,720
Depreciable Basis
$572,400 - ($171,720 x 50%)
$486,540
Year 1 Bonus Depreciation (20%)
$486,540 x 20%
$97,308
Regular Year 1 MACRS (20%)
($486,540 - $97,308) x 20%
$77,846
Total Year 1 Depreciation Deduction
$97,308 + $77,846
$175,154
Year 1 Depreciation Tax Savings
$175,154 x 29.99% (21% fed + 8.99% PA CNIT)
$52,528
Total Year 1 Tax Benefit
$171,720 ITC + $52,528 depreciation savings
$224,248
Annual Electricity Savings
~$39,000/yr
250,000 kWh x ~$0.156/kWh (PECO commercial avg)
SREC Income
~$10,000/yr
~250 MWh x $35-45/SREC via PJM-GATS
Additional MACRS deductions in Years 2-6 plus annual electricity savings ($39,000/yr) and SREC income ($10,000/yr) further reduce effective cost. With energy community bonus (50% ITC), Year 1 benefit increases to ~$314,649. Typical payback for PA C-corps: 4-6 years.
Common questions from CFOs, business owners, and tax advisors about MACRS solar depreciation in Pennsylvania.
MACRS (Modified Accelerated Cost Recovery System) allows Pennsylvania businesses to depreciate commercial solar systems over 5 years for federal tax purposes, even though solar panels last 25-30+ years. This front-loads tax deductions, creating significant cash flow benefits in the early years. In 2026, an additional 20% first-year bonus depreciation is available. PA businesses also benefit from MACRS deductions against the 8.99% Corporate Net Income Tax (CNIT), creating a combined federal+state rate of nearly 30%.
In 2026, businesses can claim 20% first-year bonus depreciation on the adjusted depreciable basis of a solar system, on top of regular MACRS depreciation. For a 200 kW system at $540,000 with 30% ITC, the depreciable basis is approximately $486,540. The 20% bonus is ~$97,300, plus regular first-year MACRS of ~$77,800 on the remaining balance, for a Year 1 deduction of ~$175,000. This is the last year with any bonus -- it drops to 0% in 2027.
Yes. Businesses that own their commercial solar system can claim both the Section 48/48E ITC (30% base, up to 70% with adders) AND 5-year MACRS depreciation. The depreciable basis must be reduced by 50% of the ITC claimed. For a 30% ITC, the depreciable basis becomes 85% of the system cost. Both benefits require system ownership -- PPA and lease structures transfer these benefits to the third-party owner.
Pennsylvania generally follows federal depreciation rules for Corporate Net Income Tax (CNIT) purposes, including bonus depreciation. This means PA C-corporations can deduct the full bonus amount at the state level as well, unlike some states (such as Massachusetts) that decouple. The combined federal 21% + PA CNIT 8.99% = 29.99% effective rate makes MACRS deductions particularly powerful for PA C-corps.
Section 179 allows businesses to expense up to $1,220,000 of qualifying equipment in the year it is placed in service, rather than depreciating it over time. Commercial solar qualifies. For smaller systems (under $1.22M), Section 179 may allow full expensing in Year 1. However, Section 179 has income limitations and phase-out thresholds. Many businesses use a combination of Section 179 and MACRS to optimize their tax position. Consult your tax advisor for the best approach.
When combining MACRS with the Section 48 ITC, the depreciable basis is reduced by 50% of the ITC claimed. The formula is: Depreciable Basis = Total System Cost - (ITC Amount x 50%). For example, a $540,000 system with a 30% ITC ($162,000) has a depreciable basis of $540,000 - $81,000 = $459,000. With a 50% ITC ($270,000), the depreciable basis would be $540,000 - $135,000 = $405,000. PA sales tax (6%) is included in the ITC-eligible basis.
C-corporations with high taxable income benefit most, since they deduct MACRS against corporate income at the 21% federal rate plus 8.99% PA CNIT rate. S-corporations and multi-member LLCs also benefit through pass-through deductions. Nonprofits and public entities cannot use MACRS directly but benefit indirectly through PPA/lease structures where the for-profit system owner claims MACRS and passes savings as lower rates.
Yes. 2026 offers 20% first-year bonus depreciation for commercial solar -- down from 40% in 2025, 60% in 2024, 80% in 2023, and 100% in 2022. In 2027, bonus depreciation drops to 0%. For a $540,000 system, acting in 2026 versus 2027 means approximately $29,000 more in Year 1 tax savings. Combined with the FEOC deadline (July 4, 2026), there is a narrow window for PA businesses to maximize both benefits.
Full commercial solar guide: ITC stacking, SRECs, PRESS Act, financing, and ROI for PA businesses.
How PA SRECs work, current pricing ($35-45/MWh), AEPS solar carve-out, and PRESS legislation impact.
Compare electric rates, net metering, and TOU plans across PA's three major utilities.
No property tax exemption, 6% sales tax, no state credit — complete PA tax analysis for solar.
Get a personalized MACRS + ITC tax savings analysis for your Pennsylvania business. Our team will model the exact Year 1 benefit based on your system size, entity type, and tax situation.
Projects must begin construction before July 4, 2026 to qualify for Section 48 ITC. 2026 is the last year for bonus depreciation (drops to 0% in 2027).