ChamTax is a free calculator for the after-tax take-home amount of a US Powerball or Mega Millions jackpot. Type any jackpot amount below and see, at a glance, how much a resident of South Korea, the US, Vietnam, China, India, Japan, the UK, or Canada would actually keep — all using the same live calculation logic as the main calculator.
Last updated: 2026-08-20
Treated as the actual lump-sum cash payout, not the bigger advertised annuity total — enter the cash value for the most accurate comparison.
Every nonresident alien who wins a US lottery has 30% withheld by the IRS immediately (IRC §871(a)) — that part is the same for all 7 non-US countries here. What changes the final number is what happens next in your home country: if your country's own tax on the winnings is lower than 30%, a foreign tax credit (FTC) cancels out your home-country bill entirely and you simply keep 70%. If it's higher than 30% — like South Korea's progressive income tax (up to 45%) or India's flat 30% plus surcharge and cess (about 39% effective) — you owe the difference on top. The United Kingdom and Canada tax nothing at all on lottery winnings (HMRC and the CRA both treat them as non-taxable windfalls), so residents there also land on the 70% floor.
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The US withholds a flat 30% from any nonresident alien's lottery winnings before it even leaves the country. If your home country's own tax on that income is lower than 30%, a foreign tax credit (FTC) offsets your home-country bill down to zero, so you only ever pay the US 30% — that's why Vietnam, China, Japan, the UK, and Canada residents can land on the identical after-tax number in this comparison. Only when a country's own rate is higher than 30% (like South Korea's progressive tax or India's flat rate plus surcharge) do you end up paying more than the US withholding alone.
HMRC (UK) and the CRA (Canada) don't tax lottery or gambling winnings at all — not because of a treaty exemption, but because neither country treats windfall winnings as taxable income in the first place. That applies the same way to foreign (US) lottery winnings as to their own domestic lotteries. The US still withholds its 30% nonresident rate regardless, so UK and Canada residents keep 70% either way.
Mostly no, because every country here uses a flat rate except South Korea, whose brackets go up to 45% and are effectively flat once winnings are in the tens of millions of dollars (the top bracket kicks in well below any realistic jackpot). So the ranking is stable across jackpot sizes — try a few different amounts above and the order barely changes.
No — this is a reference simulation using each country's standard flat or top-bracket rate, not a personal tax return. It doesn't account for other income you may have, itemized deductions, US state tax (a single national average is used for the US card), or country-specific filing quirks. Use the full calculator for a state-by-state US breakdown, and consult a qualified tax professional before making real decisions.
This page is an informational simulator only and does not broker or facilitate lottery ticket purchases. Actual tax owed depends on individual circumstances and the exchange rate/tax law in effect at filing time — consult a qualified tax professional. Country tax rates are approximated at each country's standard flat or top-bracket rate for a jackpot-sized win and may not reflect every personal circumstance.