SALT cap headroom, 2026
This works out one number from the SALT Deduction Limit figures published for 2026. Every amount it uses is below, with the document it was read from. What you enter is your own: this site has no way to check it, and the answer it produces is not a published figure.
Effective 2026-01-01Source: Publication 505 (2026), Tax Withholding and Estimated Tax (IRS)Verified 2026-09-01
How it is worked out
The published amount less the amount you enter, rounded to the nearest cent. Where what you enter is the larger of the two, the answer is nothing rather than a negative amount.
It uses Deduction limit, $40,400, the only one this year publishes.
Figures in this colour are computed from the amounts above. They are not published figures and no document states them.
Work it out
The live calculator needs JavaScript. The table below covers common amounts and is computed the same way.
Worked out for common amounts
| State and local taxes paid | Result |
|---|---|
| 0 | $40,400 |
| 5,000 | $35,400 |
| 10,000 | $30,400 |
| 40,000 | $400 |
How each figure was verified
Each number below was read from a stored copy of the document named beside it, and checked to occur word for word in the quoted sentence. The digest is of that stored text.
Publication 505 (2026), Tax Withholding and Estimated Tax (IRS)
- Deduction limit
The overall limit on the deduction for state and local income, sales, and property taxes has in- creased. For 2026, the limit is $40,400 ($20,200 if married filing separately)
Every 2026 SALT Deduction Limit figure · SALT Deduction Limit in every year · Every calculator on this site