Tools for evaluating a prize before you act
Use a prize tool to answer a defined question with inputs you can support. The federal tax calculator estimates the difference a prize makes under its stated ordinary-income assumptions, using published IRS schedules. It does not confirm a giveaway’s legitimacy, determine state tax, or replace the official rules and your own records.
By Extra Profit Editorial Team
Last reviewed
Explore entry odds under stated assumptions
Enter whole numbers within the available entry pool. Very large calculations may be unavailable.
Assumes equally likely entries drawn without replacement. A promotion that removes all of a winner’s other entries, uses weighted entries, or selects winners in separate pools needs a different model. Inputs remain in this page and are not stored or transmitted.
Start with evidence for the inputs
A precise-looking result can still be based on a poor input. Use the promotion’s official description to identify the prize and your records to identify income and withholding. For a noncash award, distinguish the sponsor’s advertised approximate retail value from supported fair market value. The IRS uses fair market value for prizes awarded in goods or services. IRS Publication 525
The calculator below is intended for a winner assessing a potential federal cash obligation. It shows the configured year, basic deduction, and bracket sources so you can see the assumptions behind the result rather than relying on an unexplained percentage.
Read the output as a difference, not your whole tax bill
The federal estimate compares tax on other income with tax on other income plus the prize. Withholding entered is then compared with that added estimate. This does not reconcile every payment, credit, deduction, or other item on a complete return. The calculator’s page gives a worked example using boundaries from the actual IRS schedule. IRS rate tables
| Tool question | What the available calculation can establish | What it cannot establish |
|---|---|---|
| How much federal ordinary-income tax might this prize add? | A difference under the displayed model and supplied inputs | A completed tax return or guaranteed balance due |
| Does a noncash prize provide the cash needed for tax? | It can show a cash planning gap | Whether acceptance is affordable after all ownership costs |
| What remains after withholding already taken? | A comparison with the model’s added federal estimate | Your total refund or a combined federal/state result |
Privacy is part of the tool design
The tool performs its arithmetic in the browser. It does not submit your values, persist them in browser storage, or add them to the address bar. Tool routes omit the site’s analytics and advertising integrations. Closing or reloading the page loses the entered values, so keep any record you need yourself.
When arithmetic is not the right next step
If the sponsor cannot be verified, a tax estimate should not make the offer seem credible. Stop and consult the scam guidance first. If the promotion’s rules do not establish the actual prize, wait for that information before using a guessed value. Calculating an uncertain claim more carefully does not make the claim true. FTC prize-scam guidance
Only tools with complete page content appear below. Each has its own assumptions and sources; this hub does not list unfinished calculators or promise features that are not available.
A small odds example you can check by hand
Suppose a hypothetical pool has ten equally likely entries, two of which are yours, and one winning entry is drawn. Two of the ten possible draws win for you. If two winning entries are drawn without replacement, the chance of missing both is eight tenths multiplied by seven ninths. Subtracting that result from one gives the chance of at least one win. These are invented arithmetic inputs, not an estimate for an advertised sweepstakes.
The tool uses this without-replacement model, which is the hypergeometric model described by NIST. It does not guess how many entries a sponsor received. If the rules do not supply that denominator, the result cannot tell you the actual chance of winning. It also cannot treat extra entries as useful when the rules prohibit them.
Available tools
- Sweepstakes Tax Calculator for 2026 Prizes
Estimate added federal tax, account for withholding, and understand the cash cost of a noncash prize.