Massachusetts
For Massachusetts, section 179 conformity is conforms; state section 179 cap is federal limit applies; state section 179 phase-out is federal phase-out applies; bonus depreciation conformity is decouples — requires add-back; add-back rule is Massachusetts specifically decoupled from the federal bonus depreciation provisions under IRC § 168(k), recorded from its source on 2026-08-15.
- State
- Massachusetts verified
- Section 179 conformity
- conforms verified
- State Section 179 cap
- federal limit applies
- State Section 179 phase-out
- federal phase-out applies
- Bonus depreciation conformity
- decouples — requires add-back
- Add-back rule
- Massachusetts specifically decoupled from the federal bonus depreciation provisions under IRC § 168(k) verified
- IRC conformity date
- rolling conformity
- Has income tax
- yes verified
- Statute or guidance citation
- IRC § 168(k) verified
What the source says
State Follows Bonus Depreciation-TCJA of 2017 : No Massachusetts does not conform to the Tax Cuts and Jobs Act provision that provides a 100% first-year deduction for the adjusted basis is allowed for qualified property acquired and placed in service after September 27, 2017, and before January 1, 2023. Massachusetts specifically decoupled from the federal bonus depreciation provisions under IRC § 168(k). State Follows IRC § 179-TCJA of 2017 : Yes Massachusetts conforms to the Tax Cuts and Jobs Act provision that increases the maximum amount a taxpayer may expense under IRC Section 179 to $1 million, increases the phase-out threshold amount to $2.5 million, and provides for indexing for inflation. Massachusetts adopts the IRC as amended and in effect for the taxable year.
— accountants.intuit.com, retrieved 2026-08-15
Sources disagree
More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.
Add-back rule
accountants.intuit.com says add-back rule is Massachusetts specifically decoupled from the federal bonus depreciation provisions under IRC § 168(k), as of 2026-08-15.
State Follows Bonus Depreciation-TCJA of 2017 : No Massachusetts does not conform to the Tax Cuts and Jobs Act provision that provides a 100% first-year deduction for the adjusted basis is allowed for qualified property acquired and placed in service after September 27, 2017, and before January 1, 2023. Massachusetts specifically decoupled from the federal bonus depreciation provisions under IRC § 168(k). State Follows IRC § 179-TCJA of 2017 : Yes Massachusetts conforms to the Tax Cuts and Jobs Act provision that increases the maximum amount a taxpayer may expense under IRC Section 179 to $1 million, increases the phase-out threshold amount to $2.5 million, and provides for indexing for inflation. Massachusetts adopts the IRC as amended and in effect for the taxable year.
crosslinktax.com says add-back rule is Massachusetts does not conform to bonus depreciation, as of 2026-08-15.
Massachusetts | No | Yes |
Sources
- accountants.intuit.comhttps://accountants.intuit.com/support/en-us/help-article/asset-depreciation/state-conformity-special-depreciation-allowance/L27kRyetJ_US_en_US
- crosslinktax.comhttps://www.crosslinktax.com/customer-resources/tax-resource-center/tax-updates/state-compliance-with-federal-bonus-depreciation-and-section-179-expensing-2025/