Maryland Bonus Depreciation: Decoupled, With a Manufacturing Exception.
Maryland recomputes depreciation without regard to the additional allowance under federal §168(k) — except for property placed in service by a manufacturing entity on or after January 1, 2019, which keeps federal bonus depreciation. That exception reverses the answer for an owner-operator who manufactures.
Reviewed by Cost Seg Smart Editorial Team · Last verified against Md. Code Ann., Tax-Gen §10-210.1 (decoupling)
The 30-second answer: Maryland has decoupled from federal §168(k) bonus depreciation. Depreciation is recomputed without regard to the additional allowance under §168(k), and the deduction is instead recovered over the asset's ordinary MACRS life.
The exception most summaries miss: property placed in service by a manufacturing entity on or after January 1, 2019 is not subject to this add-back and keeps federal bonus depreciation. If your entity manufactures, establish that fact and the placed-in-service date before assuming the standard add-back applies — it may not.
On a representative Maryland single-family rental (the single-family rental band we publish, 9–32% of depreciable basis reclassified, 16% representative), the reclassified components alone generate an estimated $18K–$165K of federal Year-1 depreciation — roughly $6,660–$61,570 of federal Year-1 tax savings at the 37% top bracket, recomputed away for Maryland purposes and recovered over the ordinary MACRS life instead, unless the manufacturing exception applies.
Federal vs Maryland, Side by Side
For an individual investor's cost-segregation-reclassified components:
| Tax provision | Federal (IRC) | Maryland |
|---|---|---|
| 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 | Recomputed away. Depreciation is computed without regard to the §168(k) additional allowance (Md. Code Ann., Tax-Gen §10-210.1) |
| Manufacturing entity exception | Not applicable | Keeps federal bonus. Property placed in service by a manufacturing entity on or after 2019-01-01 is not subject to the add-back |
| Recovery of the recomputed amount (non-manufacturing) | Not applicable | Recovered over the asset's ordinary MACRS life instead of a Year-1 bonus |
| Federal usability of the deduction | Subject to passive activity, at-risk, basis, and business-interest limits | Same federal limits govern the federal deduction; Maryland's recomputation applies independently |
| MACRS asset class lives | 5 / 7 / 15 / 27.5 / 39 yr per Rev. Proc. 87-56 | Same class lives; Maryland depreciation is computed against them without the §168(k) allowance unless the manufacturing exception applies |
Source: Md. Code Ann., Tax-Gen §10-210.1; IRC §168(k). Federal bonus figures reflect current law; eligibility depends on acquisition and placed-in-service dates and elections.
The manufacturing exception: the fact most summaries omit
Maryland's standard rule is a straightforward add-back: depreciation is computed as if the §168(k) additional allowance did not exist, and the reclassified basis is recovered over the asset's ordinary MACRS life instead of in Year 1. That is the answer most tax summaries stop at — and for the majority of Maryland property owners, it is correct.
But Md. Code Ann., Tax-Gen §10-210.1 carries a real carve-out: property placed in service by a manufacturing entity on or after January 1, 2019 is not subject to the add-back at all. For a qualifying manufacturing owner-operator, Maryland depreciation simply matches federal depreciation — the full §168(k) additional allowance included — rather than being recomputed away.
This reverses the standard answer, and it is exactly the kind of fact a generic "Maryland decouples from bonus depreciation" summary misses. Before assuming either the standard add-back or the manufacturing exception applies to a given property, establish two things with your CPA: whether the entity placing the property in service is a manufacturing entity, and whether the placed-in-service date is on or after 2019-01-01. Both conditions matter, and getting either one wrong reverses the Maryland-level answer.
The study itself is unaffected either way: the same engineering-based reclassification, using nationally-recognized construction cost data, MACRS classification per Rev. Proc. 87-56, and IRS Pub 5653 ATG-aligned documentation, produces the same component schedule. What differs is only which Maryland depreciation rule applies to that schedule.
Illustrative numbers: a Maryland single-family rental
Using the single-family residential (SFR) band we publish — 9–32% of depreciable basis reclassified into 5/7/15-year property, 16% representative — on a property priced between $250,000 and $650,000, with a 20% residential land allocation, and 100% federal bonus depreciation for eligible components under current law. This example assumes a non-manufacturing owner, the standard Maryland treatment; a qualifying manufacturing entity would instead see the Maryland column match the federal column:
| Line item | Federal | Maryland (non-manufacturing) |
|---|---|---|
| Purchase price band | $250,000–$650,000 | Same property |
| Depreciable basis (20% land allocation) | $200,000–$520,000 | Same basis before recomputation |
| Reclassified to 5/7/15-yr (9–32% of basis) | $18K–$165K | Recomputed without the §168(k) allowance |
| Year-1 treatment | $18K–$165K deducted (100% bonus, if eligible) | Ordinary MACRS Year-1 depreciation only (no §168(k) allowance) |
| Later-year treatment | Not applicable (already deducted) | Reclassified basis recovered over the remaining ordinary MACRS life |
| Marginal tax rate | Up to 37% | Maryland individual income tax rate (verify current year with the Maryland Comptroller) |
| Illustrative Year-1 federal tax savings on reclassified components | ~$6,660–$61,570 (37% × $18K–$165K) | Recovered over ordinary MACRS life instead of Year 1 (unless the manufacturing exception applies) |
Figures are illustrative and use the site's published SFR reclassification band; your result depends on your basis, land allocation, bracket, component mix, and eligibility. Whether the full federal deduction is usable in the current year still depends on your passive-loss, at-risk, basis, and business-interest situation. If the property was placed in service by a manufacturing entity on or after 2019-01-01, confirm with your CPA whether the manufacturing exception applies — it would make the Maryland column match the federal column above.
See a sample cost segregation report
Look at exactly what your Maryland 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 Maryland property
For an individual Maryland investor, the workflow runs on both the federal return and the Maryland return, because the recomputed depreciation figure (or, for a qualifying manufacturing entity, the unchanged federal figure) has to be carried through:
- 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.
- Maryland income tax return: depreciation is recomputed without regard to the §168(k) additional allowance, per Md. Code Ann., Tax-Gen §10-210.1 — unless the property was placed in service by a manufacturing entity on or after 2019-01-01, in which case the federal figure carries through unchanged.
- Ordinary MACRS recovery in later years (non-manufacturing): Maryland recovers the reclassified basis over the asset's normal 5, 7, 15, 27.5, or 39-year life, since no bonus allowance was taken for Maryland purposes.
- 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 whether Maryland recomputes it without the §168(k) allowance (the standard case) or lets it stand as filed federally (the manufacturing exception).
Form 3115 lookback on a Maryland 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 Maryland, whether the catch-up year's bonus-eligible amount is recomputed away (standard case, recovered over ordinary MACRS life) or kept intact (manufacturing exception) depends on the same manufacturing-entity, post-2019-01-01 test described above, applied to the property's actual placed-in-service date.
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 Maryland? No.
Maryland's decoupling changes the state-side depreciation schedule, not the fundamental economics — and it may not apply to you at all. The math favors doing the study, for three reasons:
- The full federal Year-1 bonus is intact regardless. Maryland 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.
- Check the manufacturing exception before assuming the add-back applies. If the entity placing the property in service is a manufacturing entity and the placed-in-service date is on or after 2019-01-01, Maryland depreciation matches federal depreciation — no recomputation at all.
- For everyone else, the reclassified basis is still recovered, just on Maryland's ordinary MACRS schedule. Recomputing without the §168(k) allowance changes the timing of the Maryland-level deduction; it does not eliminate the reclassified basis.
The nuance to flag with your CPA is the manufacturing test itself: confirm what the entity does and when the property was placed in service before assuming either the standard Maryland add-back or the manufacturing exception governs your study.
Frequently asked
Does Maryland allow bonus depreciation?
Generally, no. Maryland has decoupled from federal §168(k) bonus depreciation: depreciation is recomputed without regard to the additional allowance under §168(k), so an individual investor still claims the full federal Year-1 bonus on the federal return (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), but that bonus is added back for Maryland income tax purposes and the deduction is instead recovered over the asset's ordinary MACRS life. There is one significant exception — see the next question.
Is there an exception to Maryland's bonus depreciation add-back?
Yes, and it is the fact most summaries omit. Property placed in service by a MANUFACTURING entity on or after January 1, 2019 is not subject to the Maryland add-back and keeps federal bonus depreciation. This reverses the standard answer for a manufacturing owner-operator: instead of recomputing depreciation without §168(k), a qualifying manufacturing entity's Maryland depreciation matches its federal depreciation, additional allowance included. Establish what the entity does — and when the property was placed in service — before assuming the standard add-back applies.
What counts as a manufacturing entity for the Maryland bonus depreciation exception?
The carve-out in Md. Code Ann., Tax-Gen §10-210.1 turns on the entity placing the property in service being a manufacturing entity, and on the property being placed in service on or after January 1, 2019. Whether a specific entity and property qualify is a factual determination your CPA should make against the statute; do not assume either the standard add-back or the manufacturing exception applies without confirming what the entity does and the placed-in-service date.
How does Maryland's standard add-back work for a non-manufacturing property?
Maryland income is computed as if the §168(k) additional allowance did not exist. In practice, the property owner adds back the federal bonus depreciation deduction for Maryland purposes, and the deduction is instead recovered over the asset's ordinary MACRS life — the same 5, 7, 15, 27.5, or 39-year schedule the property would use without bonus depreciation at all, rather than Indiana- or Minnesota-style negative adjustments or subtractions.
Is cost segregation still worth it in Maryland?
In nearly every case, yes — and the answer is even more favorable if the entity manufactures. For a non-manufacturing property, the federal Year-1 benefit is the dominant driver and Maryland does not reduce it; Maryland simply recomputes its own depreciation without the additional allowance and recovers the reclassified basis over the ordinary MACRS life instead. For a qualifying manufacturing entity placing property in service on or after 2019-01-01, Maryland depreciation matches federal depreciation, so the state add-back does not apply at all. Whether the full federal deduction is usable in the current year still depends on federal passive-activity, at-risk, basis, and business-interest limits.
Can I use Form 3115 on a Maryland 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. For Maryland, whether the catch-up year's bonus-eligible amount is added back (recomputed over ordinary MACRS life) or kept intact depends on the same manufacturing-entity, post-2019-01-01 test described above.
What does a Maryland 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). For Maryland, that bonus is recomputed away for most owners and recovered over ordinary MACRS life instead, unless the property was placed in service by a manufacturing entity on or after 2019-01-01, in which case Maryland keeps the federal bonus. The engine ships our own calibrated, nationally-recognized construction cost data.
Related guides
- Bonus depreciation by state: overview
- All 50 states: conformity reference table
- Minnesota bonus depreciation (decoupled, 80% add-back)
- Indiana bonus depreciation (decoupled, first-year add-back)
- Virginia bonus depreciation (decoupled)
- Form 3115 cost segregation lookback: §481(a) mechanics
- What is cost segregation: the full primer
- Sample cost segregation reports