North Carolina Bonus Depreciation: Partial State Benefit, Federal Benefit Intact.
North Carolina partially conforms to federal §168(k) bonus depreciation. An individual North Carolina investor still claims the full federal Year-1 bonus, but for North Carolina income tax must add back 85% of the accelerated amount in Year 1 and then deduct it ratably over the following five years, with the remaining 15% allowed up front. That is a partial, phased state benefit, not a lost deduction, and current-year federal usability still depends on passive-activity, at-risk, basis, and business-interest limits.
Reviewed by Cost Seg Smart Editorial Team · Last reviewed: · Cites North Carolina Department of Revenue
The 30-second answer: North Carolina partially conforms to federal §168(k) bonus depreciation. An individual still claims the full federal Year-1 bonus on the federal return, but for North Carolina income tax must add back 85% of the accelerated amount in Year 1, then deduct that added-back amount ratably over the following five years at 20% per year. The remaining 15% is allowed up front.
On a $750K North Carolina rental with $600K depreciable basis and 18.3% reclassified to shorter-life property, the reclassified components generate about $109,800 of federal Year-1 depreciation. At a 37% federal bracket, that is about $40,600 of federal savings from the reclassified components alone; including regular depreciation on the remaining building basis, total illustrative Year-1 federal savings are about $43,900.
Cost seg still helps at the North Carolina level, because it moves basis into the shorter 5, 7, and 15-year lives, North Carolina allows 15% of the accelerated amount immediately, and the remaining 85% is deducted over the next five years rather than lost. At North Carolina's flat, declining rate the state-side timing effect is modest, and current-year federal usability still depends on passive-loss, at-risk, basis, and business-interest limits.
Federal vs North Carolina, Side by Side
For an individual investor's cost-segregation-reclassified components:
| Tax provision | Federal (IRC) | North Carolina income tax |
|---|---|---|
| Bonus depreciation under §168(k) | 100% may apply to qualified property acquired and placed in service after January 19, 2025, subject to §168(k) eligibility, related-party/prior-use, binding-contract, and election rules | Partial conformity. Add back 85% of the federal bonus in Year 1, then deduct it ratably over the next five years (20% per year); the remaining 15% is allowed up front |
| Individual income tax on rental income | Ordinary rates, up to 37% | A flat individual income tax, declining under recent law, on net rental income; confirm the current rate with the North Carolina Department of Revenue |
| State depreciation treatment of reclassified basis | Year-1 bonus on eligible components, then MACRS on the remainder | About 15% of the accelerated amount in Year 1, with the other 85% deducted over the following five years; still recovers faster than leaving basis in the 27.5/39-year shell |
| Federal usability of the deduction | Subject to passive activity, at-risk, basis, and business-interest limits | Same federal limits govern the federal deduction; North Carolina applies its own flat rate to the state-side result |
| MACRS asset class lives | 5 / 7 / 15 / 27.5 / 39 yr per Rev. Proc. 87-56 | Follows the same class lives; the 85% add-back is recovered over five years rather than expensed in Year 1 |
| Net Year-1 state benefit | Full Year-1 bonus on eligible components | Partial and phased: about 15% up front, the other 85% spread evenly across the next five years |
| Depreciation form the individual files | Form 4562 → Schedule E (rental) or Schedule C (active business) | North Carolina individual income tax return, with the Year-1 add-back and the subsequent 20%-per-year deductions |
Sources: North Carolina Department of Revenue, IRC §168(k). Federal bonus figures reflect current law; eligibility depends on acquisition and placed-in-service dates and elections. Confirm the current North Carolina rate with the Department of Revenue.
How North Carolina's partial conformity affects your cost segregation study
The study itself does not change. The same engineering-based reclassification, using nationally-recognized 2026 construction cost data, MACRS classification per Rev. Proc. 87-56, and IRS Pub 5653 ATG-aligned documentation, produces the same component schedule whether the property sits in North Carolina, Texas, or anywhere else. What changes is what happens at the state level: for North Carolina income tax, 85% of the federal bonus is added back in Year 1 and then deducted ratably over the following five years, with the remaining 15% allowed up front.
Your CPA receives the same Cost Seg Smart engineered report, the same Form 4562-ready schedule, and the same Form 3115 §481(a) section if this is a lookback study. The components then run through two calculations:
- Federal book: bonus depreciation on eligible 5/7/15-year components in Year 1, plus half-year-convention MACRS on the 27.5-year residential (or 39-year commercial) remainder, subject to the federal passive-loss, at-risk, basis, and business-interest limits.
- North Carolina book: a partial, phased benefit. Add back 85% of the accelerated amount in Year 1, allow the remaining 15% up front, then deduct the added-back 85% over the next five years at 20% per year. That still recovers faster than leaving the basis in the 27.5-year or 39-year shell, and at North Carolina's flat, declining rate the state-side timing benefit is modest.
The practical point is that cost segregation still helps in North Carolina on both fronts: the full federal Year-1 bonus is claimed on the federal return, and for North Carolina income tax the accelerated amount is partly allowed immediately and partly recovered over five years rather than lost. How much of the federal deduction you actually use in the current year still depends on your passive-loss, at-risk, basis, and business-interest situation.
Illustrative numbers: $750K North Carolina rental
An illustrative example using the Cost Seg Smart residential benchmark (SFR reclass 18.3%) and 100% federal bonus depreciation for eligible components under current law. Headline dollar figures are federal; the North Carolina column is described qualitatively because North Carolina allows about 15% of the accelerated amount in Year 1 and spreads the other 85% over five years:
| Line item | Federal | North Carolina income tax |
|---|---|---|
| Purchase price | $750,000 | $750,000 |
| Land allocation (20%) | $150,000 | $150,000 |
| Depreciable basis | $600,000 | $600,000 |
| Reclassified to 5/7/15-yr (18.3% SFR benchmark) | $109,800 | $109,800 |
| Year-1 deduction on reclassified components | $109,800 (100% bonus, if eligible) | About 15% of the accelerated amount allowed in Year 1; the other 85% is added back and deducted over the next five years (20% per year) |
| Federal savings from reclassified components alone | ~$40,600 (37% × $109,800) | Partial state benefit up front, the remainder spread over five years; modest at the flat, declining rate |
| Year-1 depreciation on remaining 27.5-yr basis | ~$8,909 | Same 27.5-year recovery on the remaining shell basis |
| Total Year-1 federal depreciation | ~$118,700 | Partial in Year 1, the 85% add-back recovered over the following five years |
| Marginal tax rate | 37% | A flat individual income tax, declining under recent law |
| Illustrative Year-1 federal tax savings | ~$43,900 (37% × ~$118,700) | Partial North Carolina benefit in Year 1, the rest phased over five years; state timing benefit modest at the flat rate |
| Cost Seg Smart study cost | $995 (residential under $1M basis) | |
| ROI on $995 study fee (illustrative, federal savings) | ~44× | |
The headline dollars above are federal. For North Carolina income tax, about 15% of the accelerated amount is allowed in Year 1 and the other 85% is added back and deducted over the following five years (20% per year), which is still faster than the 27.5-year shell, and at the flat, declining rate the state timing benefit is modest. Whether the full federal deduction is usable in the current year depends on your passive-loss, at-risk, basis, and business-interest situation. Figures are illustrative; your result depends on basis, land allocation, bracket, and eligibility.
See a sample cost segregation report
Look at exactly what your North Carolina study delivers: the component-by-component 5/7/15-year schedule, the Form 4562-ready numbers, and the documentation your CPA files. Real reports are our best answer to "is this legit?"
Forms your CPA files for a North Carolina property
For an individual North Carolina investor, the workflow runs on both the federal return and the North Carolina individual income tax return, because North Carolina does tax rental income at a flat, declining rate:
- Federal Form 4562: depreciation and amortization, including the §168(k) bonus deduction on eligible reclassified components. Flows to Schedule E (rental) or Schedule C (active business).
- Schedule E (or Schedule C): the accelerated federal deduction reduces federal taxable income in Year 1, subject to the federal passive-loss, at-risk, basis, and business-interest limits.
- North Carolina individual income tax return: add back 85% of the federal bonus in Year 1, allow the remaining 15% up front, then deduct the added-back amount over the following five years at 20% per year, taxed at the flat, declining North Carolina rate.
- Form 3115 §481(a) section: included only if this is a federal lookback method change on a property placed in service in a prior year (see below).
The reclassified schedule is the same engineered output for both books; the difference is that federal claims the full Year-1 bonus while North Carolina allows a partial Year-1 amount and recovers the 85% add-back over five years.
Form 3115 lookback on a North Carolina property
If the property was placed in service in a prior tax year and depreciation was reported using a non-segregated method, a federal Form 3115 (Application for Change in Accounting Method) may allow a current-year §481(a) catch-up adjustment for the accelerated depreciation you missed, generally without amending prior returns. This is often the single biggest acceleration mechanism in cost segregation. Any catch-up dollars are illustrative and depend on placed-in-service date, prior depreciation claimed, bonus eligibility, land allocation, and component mix.
The federal §481(a) catch-up is the primary lever, and it remains subject to the federal passive-loss, at-risk, and basis limits. For North Carolina income tax, the effect follows the state's own 85% add-back and five-year (20% per year) recovery of the accelerated amount, with the remaining 15% allowed up front, so the state-side timing benefit is modest at the flat, declining rate.
See our full Form 3115 cost segregation guide for federal mechanics, partnership and LLC pass-through treatment, and timing rules.
Should you skip cost segregation in North Carolina? No.
North Carolina's partial conformity changes the timing of the state-side benefit, not the fundamental economics. The math still favors doing the study, for three reasons:
- The full federal Year-1 bonus is intact. North Carolina does not reduce the federal deduction; the full §168(k) bonus is claimed on the federal return. How much you use in the current year still depends on your passive-loss, at-risk, basis, and business-interest situation.
- Cost seg still delivers a North Carolina benefit. North Carolina allows about 15% of the accelerated amount in Year 1 and deducts the remaining 85% over the following five years, so the state benefit is partial and phased rather than lost. Moving basis into the shorter 5, 7, and 15-year lives still recovers it faster than leaving it in the 27.5-year or 39-year shell. At the flat, declining rate, that state timing benefit is modest but real.
- The Form 3115 lookback captures missed years. If the property was placed in service in a prior year and depreciated without cost segregation, the federal §481(a) catch-up may be available, generally without amending prior returns.
The nuance to flag with your CPA is the mechanics of North Carolina's 85% add-back and five-year recovery, which is why the state benefit is partial and phased rather than an immediate Year-1 write-off. The federal benefit remains the dominant driver, subject to the taxpayer's passive-loss, at-risk, and basis situation.
Frequently asked
Does North Carolina conform to bonus depreciation?
Only partially. North Carolina does not follow federal §168(k) bonus depreciation dollar-for-dollar. For North Carolina income tax, an individual adds back 85% of the federal bonus (accelerated) depreciation in the first year, and then deducts that added-back amount ratably over the following five tax years at 20% per year. The remaining 15% of the accelerated amount is effectively allowed in the first year. On the federal return the individual still claims the full Year-1 bonus (100% may apply to qualified property acquired and placed in service after January 19, 2025, subject to §168(k) eligibility, related-party/prior-use, binding-contract, and election rules). So North Carolina is neither fully conforming nor a complete add-back: it is a partial, phased state benefit, per the North Carolina Department of Revenue.
How does North Carolina's 85% add-back and five-year rule work?
For North Carolina income tax, you start from the federal bonus (accelerated) depreciation, then add back 85% of it in the first year. That 85% add-back is not lost: you deduct it back ratably over the next five tax years, 20% each year. The 15% that is not added back is effectively allowed in the first year. So a North Carolina investor gets a partial Year-1 benefit (about 15% of the accelerated amount) and recovers the other 85% evenly across the following five years. This applies to the North Carolina income tax only; the full federal Year-1 bonus is still claimed on the federal return.
Does North Carolina tax my rental income?
Yes. North Carolina imposes a flat individual income tax, which has been declining under recent law, on individual income including net rental income. So unlike a no-income-tax state, a North Carolina investor does have a state return on which depreciation matters. Because the state rate is flat and comparatively low, and because North Carolina spreads 85% of the accelerated amount over five years, the state-side timing of the deduction is modest relative to the federal Year-1 benefit.
Is cost segregation still worth it in North Carolina?
In nearly every case, yes. The federal Year-1 benefit is overwhelmingly the dominant driver, and North Carolina does not reduce it: the full federal bonus is claimed on the federal return. At the North Carolina level, cost segregation still helps, because reclassification moves basis into the shorter 5, 7, and 15-year lives, North Carolina allows 15% of the accelerated amount immediately, and the remaining 85% is deducted over the next five years rather than lost. On a $750,000 rental with a $600,000 depreciable basis and 18.3% reclassified, roughly $109,800 moves into shorter-life property; at a 37% federal bracket that is about $40,600 of federal savings from the reclassified components alone, with total illustrative Year-1 federal savings of about $43,900. Whether you can use the full federal deduction in the current year still depends on federal passive-activity, at-risk, basis, and business-interest limits.
Can I use Form 3115 on a North Carolina property I bought years ago?
Often, yes, at the federal level. If the property was placed in service in a prior tax year and depreciation was reported using a non-segregated method, a federal Form 3115 (Application for Change in Accounting Method) may allow a current-year §481(a) catch-up for the accelerated depreciation you missed, generally without amending prior returns. Any catch-up dollars are illustrative and depend on placed-in-service date, prior depreciation, bonus eligibility, land allocation, and component mix. The federal §481(a) mechanics are the primary lever; the North Carolina effect follows the state's 85% add-back and five-year (20% per year) recovery of the accelerated amount.
What is North Carolina's income tax rate on rental income?
North Carolina levies a flat individual income tax that has been declining under recent law, applied to individual income including net rental income. There are no graduated brackets: the same flat rate applies regardless of income level. Because the rate is flat and comparatively low, and because North Carolina spreads 85% of the accelerated amount over five years, the state-side depreciation timing question is modest relative to the federal deduction, where ordinary rates can reach 37%. For the current-year rate, confirm with the North Carolina Department of Revenue.
What does a North Carolina cost segregation study rely on for its numbers?
The study reclassifies building components into IRS-recognized MACRS class lives (5, 7, and 15-year) per Rev. Proc. 87-56, using an engineering-based methodology that follows the IRS Cost Segregation Audit Techniques Guide (Publication 5653). The reclassified components may then qualify for federal §168(k) bonus depreciation on the federal return (100% for qualified property acquired and placed in service after January 19, 2025, subject to eligibility and election rules), while for North Carolina income tax the same accelerated amount is subject to the 85% add-back and five-year recovery. The engine ships our own calibrated, nationally-recognized construction cost data.
Related guides
- Bonus depreciation by state: overview
- All 50 states: conformity reference table
- California bonus depreciation (non-conforming)
- Pennsylvania bonus depreciation (PIT non-conforming)
- Texas bonus depreciation (no state income tax)
- Form 3115 cost segregation lookback: §481(a) mechanics
- What is cost segregation: the full primer
- Cost segregation in North Carolina: market and property examples
- Sample cost segregation reports