20-year property · 150% declining balance, half-year
Includes: General-purpose barns, machine sheds, storage buildings and other farm buildings. Watch: Farm property with a 15- or 20-year period still uses 150% declining balance. A structure built for one purpose, such as a hog barn or a greenhouse, is 10-year property instead, and section 179 can apply to it.
| Line 12 · Section 179 expense | $0.00 |
|---|---|
| Line 14 · Special (bonus) depreciation, 100% | $150,000.00 |
| Line 19 · MACRS, 20-year property | $0.00 |
Basis = cost × business use · bonus = (basis − §179) × bonus rate · each year = (basis − §179 − bonus) × table rate
IRS Pub 946 tables · §179 and bonus per the One Big Beautiful Bill Act · car limits per §280F and the IRS yearly revenue procedure.
Placed in service March 2026, 100% business use, no section 179 or bonus.
| Tax year | Depreciation |
|---|---|
| 2026 | $5,625 |
| 2027 | $10,829 |
| 2028 | $10,016 |
| 2029 | $9,266 |
| 2030 | $8,570 |
| 2031 | $7,928 |
| 2032 | $7,332 |
| 2033 | $6,783 |
| 2034 | $6,693 |
| 2035 | $6,692 |
| 2036 | $6,693 |
| 2037 | $6,692 |
| 2038 | $6,693 |
| 2039 | $6,692 |
| 2040 | $6,693 |
| 2041 | $6,692 |
| 2042 | $6,693 |
| 2043 | $6,692 |
| 2044 | $6,693 |
| 2045 | $6,692 |
| 2046 | $3,347 |
Source: Pub 946 Table B-2, asset class 01.3 Farm buildings except structures included in class 01.4 (class life 25, GDS 20, ADS 25). IRS Publication 946.
insytesBI. (2025). Farm buildings depreciation life. Data: IRS Publication 946, 2025 edition. https://www.insytesbi.com/calculators/depreciation/farm-buildings/<a href="https://www.insytesbi.com/calculators/depreciation/farm-buildings/">Farm buildings depreciation life</a>Farm buildings (barns and sheds) are 20-year property under MACRS (the General Depreciation System), depreciated with 150% declining balance, half-year. Under the Alternative Depreciation System the period is 25 years. Source: Pub 946 Table B-2, asset class 01.3 Farm buildings except structures included in class 01.4 (class life 25, GDS 20, ADS 25).
Section 179 is not available. Bonus depreciation is 100% for property acquired after January 19, 2025, under the One Big Beautiful Bill Act.
With no section 179 or bonus, placed in service in March 2026: $5,625 in 2026, $10,829 in 2027, $10,016 in 2028, $9,266 in 2029, and so on. The calculator above works it out for your own cost, date and business use.
Farm property with a 15- or 20-year period still uses 150% declining balance. A structure built for one purpose, such as a hog barn or a greenhouse, is 10-year property instead, and section 179 can apply to it.