TaxMath

Every state, over your own return

Your 2025 federal figures, carried into each state you pick as a full-year resident. Each number is an estimated resident-basis state tax — what you would owe if you had lived there all year — not a return, and not advice. Everything is computed in your browser; nothing about your return leaves this page.

Why the federal figure does not moveThe federal tax is the same in every row here, and that is true by limitation rather than by law. If you itemise, your state and local tax deduction would genuinely differ from state to state — but this engine takes the itemised total as you entered it and does not recompute it per state. For a filer taking the standard deduction it makes no difference; for an itemiser near the SALT cap it can.

What these figures are notEvery figure here is a full-year resident computation. TaxMath computes no part-year or nonresident return, apportions no income, applies no reciprocity, and figures no credit for tax paid to another state. If you moved during the year or earn across state lines, these numbers do not describe you. Settlement — a refund or a balance due — is figured only for the state your return says you live in, because another state’s withholding is not a payment here.

Jurisdictions (5 of 51)Link to this set

Ranked (2)

Cheapest first. Only states with no outstanding coverage gap appear here, because an ordering that includes a number known to be wrong is not a comparison.

#JurisdictionEstimated state taxShare of total incomeBasis
1Floridaprov$0Hypothetical
1Texasprov$0Hypothetical

Not ranked — coverage gaps (3)

Alphabetical, never by amount. Each row names what is missing from its figure and which way that pushes it. Where the missing pieces pull in different directions, or where a direction is unknown, no figure is shown at all — a bound cannot be claimed in a direction nobody has established.

#JurisdictionEstimated state taxShare of total incomeBasis
Californiaprov
  • too lowAlternative Minimum Tax (Form 540 line 61, Schedule P)
  • too lowIndividual Shared Responsibility Penalty (Form 540 line 92)
  • too highCalifornia Earned Income Tax Credit and Young Child Tax Credit (line 75, 76)
  • too highNonrefundable Renter’s Credit (Form 540 line 46)
  • too lowSchedule CA (540) Part I additions — the OBBBA and other decoupling
  • too highSchedule CA (540) Part I subtractions beyond Social Security and unemployment
  • direction unknownSchedule CA (540) Part II itemized deduction limitations
  • too highNonrefundable Child and Dependent Care Expenses Credit (line 40)
  • too highExcess State Disability Insurance withheld (Form 540 line 74)
  • too lowTax on a lump-sum distribution or accumulation distribution (line 34)
  • too highCredit for taxes paid to another state (Schedule S)
An entry this figure depends on has not been made yet.
blankHypothetical
New Yorkprov
  • withholds the totalNew York City resident tax (IT-201 line 47a), MCTMT (54c) and Yonkers surcharge (55)
  • too highHousehold credit, empire state child credit, college tuition credit and NY EITC
  • direction unknownForm IT-225 New York additions and subtractions
Your New York total is not shown because it would be missing the New York City resident tax, the MCTMT and the Yonkers surcharge, which are charged on this same return. The state portion is shown on its own line.
not figuredHypothetical
Washingtonprov
  • too highThe qualified family-owned small business deduction
  • too highThe charitable donation deduction above $278,000
  • too highThe business and occupation tax credit
  • direction unknownShort-term gains and the federal Schedule D netting behind the gain figure
  • too highThe exempt asset classes carved out of the base
  • too highThe credit for income or excise tax paid to another jurisdiction
One of the mechanisms this return does not model could push the figure either way, so no bound can be claimed for it.
not shownHypothetical