MACRS Depreciation Calculator — GDS & ADS
Compute IRS MACRS depreciation using official GDS or ADS tables, half-year or mid-quarter conventions, Section 179 expensing, and bonus depreciation — all in one free tool for Form 4562 preparation.
Asset & Tax Details
Examples: Office furniture, fixtures, most machinery
Max $1,160,000 (2023). Enter 0 to skip.
2024: 60% · 2025: 40% · 2026: 20%
What Is MACRS? — Modified Accelerated Cost Recovery System
MACRS (Modified Accelerated Cost Recovery System) is the U.S. federal tax depreciation system mandated by the IRS for most business property placed in service after December 31, 1986. Established under the Tax Reform Act of 1986, MACRS replaced the Accelerated Cost Recovery System (ACRS) and allows businesses to recover the adjusted basis of qualifying property over a set recovery period using IRS-published percentage tables — no salvage value required.
MACRS Depreciation Formula
Annual MACRS Deduction = Asset Cost Basis × IRS Applicable Percentage
Depreciable Basis = Cost − Section 179 − Bonus Depreciation
Accumulated Depreciation (Year n) = Sum of all prior deductions
Unlike the straight-line depreciation formula — which spreads the cost evenly over the useful life — MACRS uses accelerated front-loaded rates that deliver larger deductions in the early years of an asset's life, improving cash flow and reducing the present-value cost of taxation.
GDS vs. ADS: Choosing Your MACRS System
MACRS contains two sub-systems. The General Depreciation System (GDS) is used by default for most business property; the Alternative Depreciation System (ADS) is required in certain situations and uses straight-line depreciation over a longer ADS life.
| Factor | GDS | ADS |
|---|---|---|
| Depreciation method | 200%/150% DB switching to SL | Straight-line only |
| Recovery period | Shorter (3–39 yrs) | Longer ADS life (3–50 yrs) |
| Year 1 deduction | Larger (accelerated) | Smaller (even spread) |
| When required | Default for most property | Listed property ≤50% business use; property used outside U.S.; AMT calculation; elected by taxpayer |
| Eligible for bonus depreciation | Yes (personal property) | No |
| IRS publication | Rev. Proc. 87-57, Table A | Rev. Proc. 87-57, Table B |
MACRS Property Classes & Rates of Depreciation
Every depreciable asset is assigned to a MACRS property class based on its class life (the IRS-assigned useful life from Rev. Proc. 87-56). The property class determines the recovery period, the depreciation method, and the applicable percentage tables. The following table summarizes all GDS classes:
| GDS Class | ADS Life | Method | Year 1 Rate | Example Assets |
|---|---|---|---|---|
| 3-Year Property | 3 yrs | 200% DB → SL | 33.33% | Tractor units, racehorses, small tools |
| 5-Year Property | 5 yrs | 200% DB → SL | 20.00% | Computers, autos, light trucks, office equipment |
| 7-Year Property | 7 yrs | 200% DB → SL | 14.29% | Office furniture, fixtures, most machinery |
| 10-Year Property | 10 yrs | 200% DB → SL | 10.00% | Water transport, fruit/nut trees, single-purpose agricultural |
| 15-Year Property | 15 yrs | 150% DB → SL | 5.00% | Land improvements, fences, retail motor fuel outlets |
| 20-Year Property | 20 yrs | 150% DB → SL | 3.75% | Farm buildings, municipal sewers |
| 27.5-Year Residential Rental | 27.5 yrs | Straight Line | 1.36% | Rental houses, apartments, mobile homes |
| 39-Year Nonresidential Real | 40 yrs | Straight Line | 1.39% | Office buildings, retail stores, warehouses |
Source: IRS Rev. Proc. 87-57, IRS Publication 946 (How to Depreciate Property). Year 1 rates shown are for GDS half-year convention.
MACRS Conventions: Half-Year, Mid-Quarter, and Mid-Month
MACRS conventions determine how much depreciation is allowed in the first and last years of the recovery period. They exist because assets are purchased throughout the year, not just on January 1st.
Half-Year Convention
When: Default for all personal property (3–20 year classes).
Rule: All assets are treated as placed in service on July 1. You get half a year of depreciation in Year 1 and half a year in the final recovery year.
💡 Most common — use this unless mid-quarter applies.
Mid-Quarter Convention
When: Required when >40% of personal property is placed in service in Q4.
Rule: Assets are treated as placed in service at the midpoint of the quarter in which they were actually placed in service.
💡 Applies to ALL personal property that year, not just Q4 assets.
Mid-Month Convention
When: Required for all residential and nonresidential real property (27.5-yr and 39-yr).
Rule: The asset is treated as placed in service on the 15th of the month in which it was placed in service.
💡 Always used with real property — never with personal property.
Section 179 & Bonus Depreciation — First-Year Expensing
Before computing MACRS depreciation, the IRS requires you to apply first-year expensing options in a specific order to reduce the depreciable basis:
- Step 1 — Section 179: Elect to immediately expense up to $1,160,000 (2023) of qualifying personal property. Subject to a taxable income limitation and a phase-out threshold ($2,890,000 in 2023).
- Step 2 — Bonus Depreciation (Special Allowance): Apply the applicable bonus rate to the remaining basis after Section 179. The TCJA rate was 100% through 2022 and phases down: 80% (2023), 60% (2024), 40% (2025), 20% (2026), 0% (2027+).
- Step 3 — Regular MACRS: Apply the applicable GDS or ADS percentage tables to the reduced depreciable basis.
Cost Basis = $50,000
− Section 179 = $20,000 (elected)
After Sec. 179 = $30,000
− Bonus (60%) = $18,000
MACRS Basis = $12,000
Year 1 MACRS = $12,000 × 20.00% = $2,400
Total Yr 1 Deduction = $20,000 + $18,000 + $2,400 = $40,400
How to Calculate Accumulated Depreciation Under MACRS
Accumulated depreciation is the running total of all depreciation deductions taken on an asset since it was placed in service. Under MACRS, you track it year by year using the formula:
Accumulated Depreciation (Year n) = Σ (Cost × MACRS Rate) for Years 1 through n
Ending Book Value (Year n) = Original Cost − Accumulated Depreciation (Year n)
For example, a $25,000 asset in the 7-year class (GDS, half-year):
| Year | IRS Rate | Deduction | Accum. Depr. | Book Value |
|---|---|---|---|---|
| Year 1 | 14.29% | $3,572.50 | $3,572.50 | $21,427.50 |
| Year 2 | 24.49% | $6,122.50 | $9,695.00 | $15,305.00 |
| Year 3 | 17.49% | $4,372.50 | $14,067.50 | $10,932.50 |
| Year 4 | 12.49% | $3,122.50 | $17,190.00 | $7,810.00 |
| Year 5 | 8.93% | $2,232.50 | $19,422.50 | $5,577.50 |
| Year 6 | 8.92% | $2,230.00 | $21,652.50 | $3,347.50 |
| Year 7 | 8.93% | $2,232.50 | $23,885.00 | $1,115.00 |
| Year 8 | 4.46% | $1,115.00 | $25,000.00 | $0.00 |
Reporting MACRS on IRS Form 4562
All depreciation, Section 179, and bonus depreciation deductions must be reported annually on IRS Form 4562 — Depreciation and Amortization. Key sections of Form 4562:
- Part I (Lines 1–12): Section 179 election — list each asset and elected amount.
- Part II (Lines 14–15): Special depreciation allowance (bonus depreciation).
- Part III (Lines 19–26): MACRS depreciation for current-year and prior-year assets.
- Part VI (Lines 42–44): Amortization of intangibles (Section 197 assets).
⚠️ Depreciation Hub provides educational tools only. Always consult a licensed CPA or tax attorney for filing advice. IRS limits and phase-out thresholds change annually.