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Get a Free Quote5-year accelerated depreciation + 100% first-year bonus + Section 48 ITC stacking + PA 8.99% CNIT deduction. OBBBA permanently restored 100% bonus depreciation — it no longer phases down to 0%.
MACRS Schedule
5 Years
vs. 25+ year panel life
Bonus Depreciation
100%
First-year deduction (permanent)
PA CNIT Rate
8.99%
State-level MACRS savings
ITC Stacking
30-70%
Section 48/48E credit
MACRS (the Modified Accelerated Cost Recovery System) is the federal rule that lets a business recover a capital asset as a tax deduction, not a credit. Commercial solar is 5-year property, so the IRS lets you write off the full cost over five tax years against a 25-30+ year asset. That mechanism is identical nationwide — the federal schedule, basis math, and entity rules live on our national MACRS depreciation hub. This page is about how MACRS plays out specifically in Pennsylvania, where the state tax picture and the incentive stack look very different from New Jersey or New England.
Pennsylvania has two features that shape the calculus. First, the Corporate Net Income Tax (CNIT) is mid-pack and falling: it has stepped down from 9.99% and is on a statutory glide path toward 4.99% by 2031, sitting at 8.99% for 2026. Crucially, PA generally conforms to federal depreciation for CNIT — unlike Massachusetts, which decouples — so the full 100% bonus lands on the state return too, giving a PA C-corp a combined federal + state marginal rate of about 29.99% in 2026. Because the rate is scheduled to decline, the deduction is worth slightly more taken now than later.
Second, the surrounding stack is leaner than NJ's. Pennsylvania has no solar sales-tax exemption (6% applies) and no property-tax exemption, but it does have the AEPS (Alternative Energy Portfolio Standard) solar carve-out, which creates tradeable SRECs/AECs($20-40/MWh), plus full-retail net metering up to 5 MW through PECO, PPL Electric, Duquesne Light, and the FirstEnergy companies (Met-Ed, Penelec, West Penn Power). Many PA counties also qualify for the +10% federal Energy Community ITC adder thanks to the state's coal-mining history. A 200 kW system around $2.70/W (~$540,000) can recover well over 40% of cost in Year 1 once MACRS and the ITC are stacked.
Straight-line over a 25-39 year life dribbles the deduction out in tiny slices; MACRS plus 100% bonus collapses it into Year 1. In Pennsylvania there is an added timing reason to act: because PA conforms to federal depreciation but its CNIT rate is scheduled to fall(8.99% in 2026, gliding toward 4.99% by 2031), the same deduction shields more state tax the earlier it is taken. Front-loading the write-off captures today's higher 29.99% combined rate rather than a lower future one.
On top of the 5-year schedule, commercial solar qualifies for 100% first-year bonus depreciation, permanently restored by OBBBA (IRC §168(k)) for property placed in service after January 19, 2025 — the full adjusted basis is deducted in Year 1. This is a federal rule, and because Pennsylvania generally conforms to federal depreciation for CNIT (more on that below), the 100% Year 1 deduction flows through to the PA return as well, with no state add-back.
2022
100%
Expired
2023
80%
Expired
2024
60%
Expired
Jan 19, 2025
40%
Expired
2025+ (OBBBA)
100%
Current
2026 & after
100%
Current
The Tax Cuts and Jobs Act (TCJA) had established a phasedown from 100% bonus depreciation in 2022 toward 0% by 2027. OBBBA reversed that: it permanently restored 100% first-year bonus depreciation (IRC §168(k), IRS Notice 2026-11) for property placed in service after January 19, 2025. A system placed in service in 2026, 2027, or later all qualify for the full 100% bonus — the timing benefit no longer disappears.
The MACRS 5-year class uses 200% declining balance switching to straight-line, but the 100% bonus makes that schedule moot — Year 1 captures the whole basis. The worked figures below use a Pennsylvania 200 kW system: at a mid-size PA installed price near $1.45-$1.80/W (per NuWatt's commercial pricing), a 200 kW project runs about $540,000 of equipment. Remember PA adds 6% sales tax to that — unlike NJ — and that taxed amount flows into the ITC-eligible and depreciable basis, which the PA case study below carries through in full.
| Year | Standard MACRS | With 100% Bonus | On $459K Basis* |
|---|---|---|---|
| Year 1 | 20.00% | 100.00% | $459,000 |
| Year 2 | 32.00% | 0.00% | $0 |
| Year 3 | 19.20% | 0.00% | $0 |
| Year 4 | 11.52% | 0.00% | $0 |
| Year 5 | 11.52% | 0.00% | $0 |
| Year 6 | 5.76% | 0.00% | $0 |
| Total | 100% | 100% | $459,000 |
* Example: $540,000 system with 30% ITC. Depreciable basis = $540,000 - ($162,000 x 50%) = $459,000
An owner can claim both the Section 48/48E ITC and MACRS, with the depreciable basis reduced by 50% of the ITC. The basis math is federal and the same everywhere; the Pennsylvania-specific detail is that the 6% PA sales tax is included in the ITC-eligible basis. That means the tax you pay at purchase is itself partly recovered through the credit — a 30% ITC claws back roughly 30% of the sales tax, and an Energy Community project recovers even more. The walkthrough below carries the sales tax through every step.
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 100% first-year bonus to the adjusted basis. The entire depreciable basis is expensed in Year 1, leaving nothing for the remaining MACRS schedule.
Bonus: $486,540 x 100% = $486,540. Remaining MACRS basis: $0. Year 1 total: $486,540
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 + ($486,540 x 29.99%) = $171,720 + $145,913 = $317,633 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.
Section 179 expenses up to $1,220,000 in Year 1 (2026 limit), with an income cap and a phase-out above $3,050,000 of total capex. For most Pennsylvania solar projects it adds little: because PA conforms to federal depreciation, 100% bonus MACRS already expenses the full basis in Year 1 on both the federal and CNIT returns, with no income limitation. Section 179 mainly comes up where a business wants to fine-tune the deduction against a specific income year. Model both with your CPA.
MACRS and the ITC reduce what a system costs; Pennsylvania's Alternative Energy Portfolio Standard (AEPS) is what keeps paying after it's built. The AEPS solar carve-out obligates load-serving entities to source a slice of energy from in-state solar, which creates tradeable SRECs / AECs (Alternative Energy Credits). A 200 kW system produces roughly 250 MWh a year, so at the current $20-40/MWh PA market that is on the order of $5,000-$10,000 a year of credit revenue, sold through PJM-GATS — taxable income that, importantly, does not reduce the MACRS depreciable basis.
Where that energy is consumed matters too. Pennsylvania offers full-retail net metering up to 5 MW across its major utilities — PECO (Philadelphia region), PPL Electric (central/eastern PA), Duquesne Light (Pittsburgh), and the FirstEnergy companies (Met-Ed, Penelec, West Penn Power). Commercial rates here ($0.11-$0.16/kWh depending on utility and class) sit below New England, so the PA case for solar leans more on the federal tax stack plus AEPS revenue than on raw bill avoidance. That is the structural difference from a high-rate state — and exactly why front-loading the high-value MACRS deduction matters here.
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. Projects that begin construction on or before July 4, 2026 lock in the full timing pathway; projects that begin after that date can still qualify but generally must be placed in service by December 31, 2027.
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 bonusdue 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 credit (Section 25D) expired December 31, 2025. The Section 48/48E commercial ITC is a separate, still-active programfor business projects (and third-party-owned residential under PPA/lease). For Pennsylvania, the 48E adders are the headline: with PA's coal-mining legacy putting many counties in an Energy Community zone, a +10% adder is realistic across much of the state, lifting a typical PA project toward 40-50% before low-income bonuses. Begin construction on or before July 4, 2026 to lock the full timing pathway; later starts still qualify if placed in service by December 31, 2027. The third-party owner — not the installer — claims the credit.
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, and the cleanest in Pennsylvania. Because PA conforms to federal depreciation for CNIT, a C-corp takes the full 100% bonus on BOTH returns — 21% federal + 8.99% PA = 29.99% combined. With the CNIT scheduled to fall to 4.99% by 2031, the deduction is worth slightly more captured now than in a later year.
MACRS passes through to shareholders on Schedule K-1. At the PA level, pass-through income hits the flat 3.07% Personal Income Tax — a far lower state rate than NJ's graduated brackets, so the bulk of an S-corp's benefit here is federal. Requires sufficient tax basis.
Allocations flow to members per the operating agreement and are taxed at PA's flat 3.07% PIT at the member level. Tax-equity partnerships can optimize the allocation, which is common on larger PA projects pairing the ITC with AEPS/SREC revenue.
MACRS flows to Schedule C and offsets the PA 3.07% PIT through the personal return. Effective where the owner has significant business income; limited by passive-activity rules if the solar is a separate activity.
Cannot use MACRS directly (no taxable income) — relevant for PA municipalities, school districts, and universities. A PPA or lease lets a for-profit owner claim MACRS + ITC (and the Energy Community adder, which many PA sites qualify for) and pass the value back as a lower per-kWh rate.
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 (100%)
$486,540 x 100%
$486,540
Regular Year 1 MACRS
($486,540 - $486,540) x 20% = $0 (basis fully expensed)
$0
Total Year 1 Depreciation Deduction
$486,540 + $0
$486,540
Year 1 Depreciation Tax Savings
$486,540 x 29.99% (21% fed + 8.99% PA CNIT)
$145,913
Total Year 1 Tax Benefit
$171,720 ITC + $145,913 depreciation savings
$317,633
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
Annual electricity savings ($39,000/yr) and SREC income ($10,000/yr) further reduce effective cost. With 100% bonus depreciation, the full basis is expensed in Year 1, so there are no residual MACRS deductions in later years. With energy community bonus (50% ITC), the Year 1 benefit is even larger. 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 is a federal method, so the 5-year schedule and the permanent 100% first-year bonus (IRC §168(k), OBBBA, for property placed in service after January 19, 2025) apply the same way in Pennsylvania as elsewhere. The PA-specific points are: (1) Pennsylvania generally conforms to federal depreciation for the Corporate Net Income Tax (CNIT), so the full Year 1 deduction also lands on the state return — combined 21% federal + 8.99% PA = 29.99%; and (2) the CNIT is on a glide path from 9.99% down to 4.99% by 2031, so the deduction shields slightly more tax the earlier it is taken.
Claim 100% first-year bonus (IRC §168(k), permanent under OBBBA) on the adjusted basis. For a PA 200 kW system at $540,000 of equipment plus 6% PA sales tax ($32,400) = $572,400, a 30% ITC produces a depreciable basis of about $486,540, all deducted in Year 1. Because PA conforms to federal depreciation, that same Year 1 deduction flows through to the CNIT return with no add-back — a key advantage over states like Massachusetts that decouple from federal bonus.
Yes — Pennsylvania owners can stack federal MACRS, the Section 48/48E ITC (30% base, up to 70% with adders including the Energy Community bonus that many PA counties qualify for), AND ongoing AEPS/SREC revenue. The depreciable basis is reduced by 50% of the ITC; SREC/AEC income ($20-40/MWh) is taxable but does not reduce that basis. PA 6% sales tax is included in the ITC-eligible basis. All tax benefits require system ownership — PPA and lease structures transfer them 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.
No. The TCJA phasedown (100% in 2022 toward 0% by 2027) was reversed by OBBBA, which permanently restored the 100% first-year bonus under IRC §168(k) for property acquired and placed in service after January 19, 2025 (IRS Notice 2026-11). Projects placed in service in 2027 and beyond still get the full 100% bonus. For Pennsylvania this is doubly useful because PA conforms to federal depreciation, so the full bonus also applies to the CNIT. The July 4, 2026 date is separate — it is the begin-construction lock-in for the full Section 48E timing pathway and the domestic-content (FEOC) date, not a bonus-depreciation deadline.
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.
Begin construction on or before July 4, 2026 to lock in the full Section 48E timing pathway; later starts still qualify but generally must be placed in service by Dec 31, 2027. 100% bonus depreciation is permanent under OBBBA.