IRS depreciation for commercial roof replacement. Roofs on nonresidential buildings qualify for Section 179 expensing under the TCJA.
Year 1 Deduction
$2,457
Recovery Period
39 years
Total Depreciation
$102,457
Method
Straight-Line
Year
Rate
Deduction
Cumulative
1
2.46%
$2,457
$2,457
2
2.56%
$2,564
$5,021
3
2.56%
$2,564
$7,585
4
2.56%
$2,564
$10,150
5
2.56%
$2,564
$12,714
6
2.56%
$2,564
$15,278
7
2.56%
$2,564
$17,842
8
2.56%
$2,564
$20,406
9
2.56%
$2,564
$22,970
10
2.56%
$2,564
$25,534
11
2.56%
$2,564
$28,098
12
2.56%
$2,564
$30,662
13
2.56%
$2,564
$33,226
14
2.56%
$2,564
$35,791
15
2.56%
$2,564
$38,355
16
2.56%
$2,564
$40,919
17
2.56%
$2,564
$43,483
18
2.56%
$2,564
$46,047
19
2.56%
$2,564
$48,611
20
2.56%
$2,564
$51,175
21
2.56%
$2,564
$53,739
22
2.56%
$2,564
$56,303
23
2.56%
$2,564
$58,868
24
2.56%
$2,564
$61,432
25
2.56%
$2,564
$63,996
26
2.56%
$2,564
$66,560
27
2.56%
$2,564
$69,124
28
2.56%
$2,564
$71,688
29
2.56%
$2,564
$74,252
30
2.56%
$2,564
$76,816
31
2.56%
$2,564
$79,380
32
2.56%
$2,564
$81,944
33
2.56%
$2,564
$84,509
34
2.56%
$2,564
$87,073
35
2.56%
$2,564
$89,637
36
2.56%
$2,564
$92,201
37
2.56%
$2,564
$94,765
38
2.56%
$2,564
$97,329
39
2.56%
$2,564
$99,893
40
2.56%
$2,564
$102,457
IRS Classification
IRS Asset Class: 39-year OR Section 179 (TCJA special rule for nonresidential roofing)
Section 179: EligibleBonus Depreciation: Not Eligible
Key Tax Facts
Commercial roof replacements qualify for Section 179 under TCJA (Tax Cuts and Jobs Act)
Without Section 179, a commercial roof is a 39-year structural component
Section 179 limit ($1,160,000 for 2023) applies to total Section 179 property
Applies only to nonresidential buildings — not residential rental property
Must be a replacement, not new construction
What This Covers
Flat roof replacement
Metal roof replacement
Shingle roof on commercial building
TPO and EPDM membrane roofing
Common Questions
Yes. The Tax Cuts and Jobs Act of 2017 specifically made roofing replacements on nonresidential buildings eligible for Section 179 expensing. Without Section 179, a commercial roof is a 39-year structural component. With Section 179, you can deduct the full cost up to the annual limit ($1,160,000 for 2023) in year 1.
No. Bonus depreciation is not available for roofs because roofs are structural components of a building (39-year property). Only QIP (interior improvements) and other non-structural improvements qualify for bonus depreciation. However, Section 179 achieves the same result for nonresidential roofing.
Residential rental property does not qualify for the special Section 179 roofing rule. A new roof on a rental house is a 27.5-year structural improvement. It must be capitalized and depreciated over 27.5 years.
Tax disclaimer: This calculator provides estimates based on standard IRS MACRS rules from Publication 946. Your actual depreciation deduction may differ based on business-use percentage, the mid-quarter convention, state tax conformity, bonus depreciation phase-outs, and other factors specific to your situation. Always consult a licensed CPA or tax professional before making tax decisions.