What Is MACRS Depreciation?

MACRS, defined

MACRS (Modified Accelerated Cost Recovery System) is the IRS depreciation framework. Real property uses the straight-line method over its recovery period — 27.5 or 39 years.

Straight line for buildings

Although MACRS allows accelerated methods for some assets, buildings must use straight-line: the same deduction each full year (building basis ÷ recovery period).

Shorter-life components

Cost segregation moves qualifying components into shorter MACRS classes (5-, 7-, 15-year), where faster methods and bonus depreciation apply.

GDS vs. ADS

MACRS has two systems. The General Depreciation System (GDS) is the default and uses the 27.5- or 39-year recovery periods for real property. The Alternative Depreciation System (ADS) uses longer periods — 30 years for residential rental placed in service after 2017, 40 years for commercial — and is required in certain situations: property used mainly outside the U.S., tax-exempt use property, and property of a real-property trade or business that elects out of the business-interest limitation under Section 163(j). Once you use ADS for a property, you generally can't switch back.

The conventions that set year-one deductions

MACRS doesn't assume you owned the property the whole first year. Real property uses the mid-month convention: it's treated as placed in service in the middle of the month you started renting it, so a property first rented in July gets 5.5 months of depreciation that year. Personal-property components (from a cost segregation study) generally use the half-year convention, or the mid-quarter convention if more than 40% of the year's personal-property additions land in the last quarter. These conventions are why your first- and last-year deductions are partial.

How the 27.5-year rate actually works

Under GDS straight-line with the mid-month convention, residential rental basis is recovered evenly except for the partial first and last years. The IRS publishes the exact percentages in the Table A charts in Publication 946. As a rule of thumb, a full year of residential depreciation is building basis divided by 27.5 — about 3.636% per year. The property is depreciated until basis reaches zero (fully depreciated after 27.5 years) or you dispose of it, whichever comes first.

A quick worked example

You buy a rental for $330,000 and, using the assessor's ratio, allocate $80,000 to land and $250,000 to the building. Your depreciable basis is $250,000. A full year of GDS depreciation is $250,000 ÷ 27.5 = about $9,090. If you place it in service in April, the mid-month convention gives you roughly 8.5 months in year one — about $6,440 — and you pick up the balance in year 28. That annual $9,090 deduction offsets rental income dollar-for-dollar on Schedule E.

Placing property in service

Depreciation starts when the property is placed in service — ready and available for rent — not when you buy it or when a tenant moves in. A rental listed and available on August 1 is placed in service August 1, even if it sits vacant. Improvements made before it's rent-ready are added to basis rather than expensed. Getting the placed-in-service date right matters because it sets which month the mid-month convention runs from.

Where MACRS is reported

You compute and report MACRS depreciation on Form 4562, Depreciation and Amortization, and carry the deduction to Schedule E for rental real estate. You'll list each asset, its basis, recovery period, method, convention, and the current-year deduction. Keep a running depreciation schedule for the life of the property — you'll need the accumulated total to compute your gain and depreciation recapture when you sell.

The property classes at a glance

MACRS sorts assets into recovery-period classes. For real estate investors the ones that come up most are: 5-year (carpet, appliances, decorative fixtures, certain furniture), 7-year (office furniture, some equipment), 15-year (land improvements — driveways, sidewalks, fencing, landscaping, and qualified improvement property), 27.5-year (residential rental buildings), and 39-year (commercial buildings). The 5- and 7-year classes use the 200% declining-balance method (faster early write-off), 15-year uses 150% declining balance, and the building classes are straight line. A cost segregation study is essentially the exercise of sorting a building's cost into these classes.

Bonus depreciation and Section 179 within MACRS

MACRS interacts with two acceleration tools. Bonus depreciation (Section 168(k)) lets you deduct a large percentage of a qualifying asset's cost — property with a recovery period of 20 years or less — in the first year; the percentage has been changing year to year, so check the rate for the year you place property in service. Section 179 expensing can immediately deduct certain qualifying property up to an annual cap, though it can't create a loss and has real-estate limits. Neither applies to the 27.5- or 39-year building shell, but both can supercharge the shorter-life components a cost segregation study identifies.

The half-year and mid-quarter conventions

Personal-property components don't use the real-property mid-month rule. The default is the half-year convention: assets placed in service anytime during the year get half a year of depreciation, regardless of the actual date. But if more than 40% of your total personal-property additions for the year are placed in service in the last three months, the mid-quarter convention kicks in, and each asset's first-year deduction depends on which quarter it entered service. Bunching large purchases into the fourth quarter can unexpectedly trigger this and shrink your first-year deduction.

When depreciation stops

MACRS depreciation continues until the earlier of two events: your basis is fully recovered, or you dispose of the property. If you take the property out of service (convert a rental back to personal use, for instance), depreciation pauses. When you sell, you claim a partial year under the applicable convention and then stop. The total you've claimed over the years — your accumulated depreciation — reduces your adjusted basis and is what gets recaptured as unrecaptured Section 1250 gain (up to 25%) at sale.

Fixing missed or wrong depreciation

If you never claimed depreciation, or used the wrong method or recovery period for two or more years, you generally can't just amend prior returns — the IRS treats a depreciation method as an accounting method. The fix is Form 3115, Application for Change in Accounting Method, which lets you make a Section 481(a) catch-up adjustment to claim the omitted depreciation, often in a single year, without amending each old return. This matters because recapture is computed on depreciation allowed or allowable — you'll be taxed on it at sale whether or not you deducted it, so catching it up first is almost always worthwhile.

State conformity to MACRS

MACRS is a federal system. Most states begin with federal taxable income and accept your MACRS deductions, but several decouple in specific ways — most commonly by disallowing or limiting bonus depreciation and sometimes Section 179. When a state decouples, you keep a separate state depreciation schedule and basis, adding back the federal acceleration and deducting it more slowly over the asset's life. Investors who own property in multiple states should check each state's conformity rather than assume the federal number flows through unchanged.

MACRS and passive-activity limits

Depreciation is a deduction, but whether you can use it this year depends on the passive-activity loss rules. Rental real estate is generally passive, so MACRS deductions that push your rental into a loss may be suspended and carried forward until you have passive income or sell the property — unless you qualify for the up-to-$25,000 special allowance (phasing out between $100,000 and $150,000 of income) or for real estate professional status. So a large MACRS or cost-seg deduction doesn't always translate into a current-year tax cut; model your ability to use it.

Why MACRS depreciation is still worth claiming

Some owners are tempted to skip depreciation to avoid recapture later — a mistake on two counts. First, recapture is computed on depreciation allowed or allowable, so you owe it whether or not you claimed the deductions. Second, a dollar of deduction today is worth more than a dollar of recapture years from now because of the time value of money, and because you may defer the recapture entirely with a 1031 exchange or erase it with a step-up in basis at death. Claim MACRS every year, keep the schedule current, and plan the exit.

A short glossary

A few MACRS terms recur: recovery period is how many years an asset is depreciated over (its class life); basis is the amount you're recovering (cost less land, plus improvements); convention determines the first- and last-year fraction (mid-month for real property, half-year or mid-quarter for personal property); method is how the deduction is spread (straight line for buildings, declining balance for shorter-life assets); and placed in service is the date the asset is ready and available for its intended use, which starts the clock. Get these five right for each asset and your depreciation schedule follows.

Frequently asked questions

Sources

• IRS Publication 946 — How to Depreciate Property
• IRS Publication 527 — Residential Rental Property

Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.

Related

• Rental Property Depreciation Calculator
• What Is a Cost Segregation Study?