California · Historic Rehabilitation Tax Credit
Historic Rehabilitation Tax Credit in California (2026)
Claim a 20% tax credit on qualified rehabilitation expenses for certified historic structures, taken ratably over 5 years. California has a progressive income tax with a top rate of 13.3%, so a California filer's combined marginal rate on the next dollar at $91,905 of income is about 31.3% (22% federal + 9.3% CA).
2026 savings example for California
Planning estimate for a single filer earning $91,905 (California median household income in LevyIO's state dataset) who claims a $5,000 credit. Federal tax uses the 2026 IRS brackets after the $16,100 standard deduction; CA tax uses the state brackets in LevyIO's dataset and assumes the state follows the federal treatment.
Estimated total savings
$5,000
Federal savings
$5,000
$11,389 → $6,389 · 22% bracket
CA state savings
$0
Federal credit only; check for a state credit
Combined marginal rate
31.3%
Credits do not depend on the bracket
Federal × California marginal rates (2026, single)
Gross-income ranges include the federal standard deduction. The CA column is the state marginal rate at the midpoint of each range. A credit saves its face value regardless of bracket.
| Federal bracket | Gross income (single) | CA marginal | Combined | Per $1,000 |
|---|---|---|---|---|
| 10% | $16,100 - $28,500 | 2% | 12% | $1,000 |
| 12% | $28,500 - $66,500 | 6% | 18% | $1,000 |
| 22% | $66,500 - $121,800 | 9.3% | 31.3% | $1,000 |
| 24% | $121,800 - $217,875 | 9.3% | 33.3% | $1,000 |
| 32% | $217,875 - $272,325 | 9.3% | 41.3% | $1,000 |
| 35% | $272,325 - $656,700 | 11.3% | 46.3% | $1,000 |
| 37% | Over $656,700 | 11.3% | 48.3% | $1,000 |
Eligibility & forms
Owners of certified historic structures who undertake substantial rehabilitation
- 20% credit for certified historic structures
- Must be a substantial rehabilitation (exceed adjusted basis)
- Must follow Secretary of Interior's Standards
Federal forms: Form 3468, NPS Form 10-168
California filing notes
Maximize tax-deferred contributions. Plan for the additional 1% surcharge over $1M. If leaving California, document your move thoroughly. The FTB aggressively audits departing high-income residents.
Common mistakes: Not getting Part 1 certification before starting work; Failing to meet the substantial rehabilitation test; Not spreading credit over 5 years as required.
Frequently asked questions
How much can the Historic Rehabilitation Tax Credit save a California taxpayer in 2026?
Credits reduce tax dollar-for-dollar. In LevyIO's example, a single filer with $91,905 of income (the California median household income in our state dataset) and a $5,000 credit would cut 2026 federal tax from $11,389 to $6,389, a $5,000 saving. Whether California offers a matching state credit depends on the CA return, so the estimate counts federal savings only.
What is the California income tax rate for 2026?
California has a progressive income tax with a top rate of 13.3%. The CA standard deduction in LevyIO's dataset is $5,706 single / $11,412 married. Highest state income tax (13.3%). Additional 1% Mental Health Services Tax over $1M. No preferential capital gains rate.
Who qualifies for the Historic Rehabilitation Tax Credit in California?
Owners of certified historic structures who undertake substantial rehabilitation. The federal rules are the same in every state; the requirements are: 20% credit for certified historic structures; Must be a substantial rehabilitation (exceed adjusted basis); Must follow Secretary of Interior's Standards. California filers should confirm on the CA return whether the state follows the federal treatment.
Which forms do I file to claim the Historic Rehabilitation Tax Credit?
Federal: Form 3468, NPS Form 10-168. California: check the California Franchise Tax Board instructions for the matching state schedule. Common mistakes: Not getting Part 1 certification before starting work; Failing to meet the substantial rehabilitation test; Not spreading credit over 5 years as required.
Historic Rehabilitation Tax Credit in other states
Sources
Reviewed 2026-09-17. Estimates are educational planning figures computed from the IRS 2026 inflation adjustments and LevyIO's state bracket dataset; they are not tax advice.