What the calculator does
The tool combines the eligible state income tax or general sales tax amount you select with entered real property tax, applies the 2025 limit and MAGI phaseout, and adds the allowed result to your entered other itemized deductions. Medical, charitable, mortgage-interest, and other Schedule A rules remain your responsibility.
Frequently asked questions
Can I deduct both state income tax and state sales tax?
No. Schedule A generally permits either state and local income taxes or state and local general sales taxes, not both. Eligible real property taxes may be added before the overall SALT limit is applied.
What 2025 SALT limit does this tool use?
For 2025, the starting limit is $40,000 for most filing statuses and $20,000 for married filing separately. A MAGI phaseout begins at $500,000, or $250,000 for married filing separately, with floors of $10,000 and $5,000 respectively.
Does a calculated SALT deduction automatically reduce my tax?
No. SALT is a Schedule A itemized deduction. It affects federal taxable income only if you itemize, and the benefit depends on your complete return. This tool compares entered itemized amounts with the base standard deduction but does not include age, blindness, or dependent adjustments, calculate tax savings, or determine eligibility for every item.