Lottery tax calculator

Estimate what is withheld at payout and what could still be due after your final federal and state tax rates are applied.

Advertised jackpot or gross prize

Payout type

Cash offer as % of advertised jackpot

Annuity payment years

Estimated final federal tax rate (%)

Estimated state/local tax rate (%)

This calculator uses a simplified model. It treats the lottery payment as taxable gambling income and uses the IRS flat 24% withholding rate for certain gambling winnings as a planning input.¹ Your actual federal tax, state tax, deductions, residency, claim structure, and payment timing can change the result.

Why withholding is not the same as final tax

The IRS says gambling winnings are taxable income and must be reported on your return.² If a large prize has 24% federal withholding, that does not mean the final federal tax rate is 24%. A very large lottery payment can push the winner into a higher marginal bracket, creating a second tax bill unless estimated payments are planned.

Planning point: before spending or gifting, isolate a tax reserve. Many winners should keep federal, state, and local estimates in a separate high-liquidity account until the return is filed.

Next: compare the same prize under the lump sum vs annuity calculator, then read the first-30-days checklist.

Sources

IRS Publication 17, gambling winnings withholding discussion.
IRS Topic 419, gambling income and losses.

Get matched before you claim or spend

A fee-only advisor can coordinate the tax reserve, investment policy, liquidity plan, and family-support boundaries before irreversible decisions are made.