Lottery Tax Calculator
Calculate tax on UK lottery jackpots and US Mega Millions / Powerball. See why UK winnings are 100% tax-free at payout, model follow-on bank savings interest, and understand US federal withholding.
UK Prize Calculator
Model tax at payout, follow-on interest tax, and family gifting rules.
Average UK high-yield savings / money market return.
£1,000,000
Total net cash transferred directly to your bank
HMRC Tax Due
£0.00
HMRC BIM22015 / Tax-Free Windfall
Subsequent Bank Savings Interest
at 4% AERGross Annual Interest
£40,000
Income Tax (45% rate)
-£18,000
Net Annual Interest
£22,000
Net monthly passive income: £1,833/month. Interest generated on cash is subject to HMRC savings tax rules. For tailored scenarios, use our after-tax interest calculator.
Gifting Lottery Winnings: The 7-Year Inheritance Tax (IHT) Rule
Gifts made from prize winnings to family or friends count as Potentially Exempt Transfers (PETs). If you survive 7 years after the gift, 0% IHT is owed.
| Time Between Gift & Death | IHT Taper Relief | Effective Tax Rate | Potential IHT on £100,000 |
|---|---|---|---|
| 0 to 3 years | Nil (Full 40% rate) | 40% | £40,000 |
| 3 to 4 years | 20% reduction | 32% | £32,000 |
| 4 to 5 years | 40% reduction | 24% | £24,000 |
| 5 to 6 years | 60% reduction | 16% | £16,000 |
| 6 to 7 years | 80% reduction | 8% | £8,000 |
| 7+ years | 100% exempt (PET survived) | 0% | £0.00 |
Note: Each UK resident also receives a £3,000 annual gift exemption each tax year, plus gifts out of surplus normal income. If gifting large sums from lottery prizes, consult a qualified tax solicitor.
Featured Snippet Table: UK vs US Lottery Tax Rules
Summary of statutory taxation differences between UK National Lottery / EuroMillions prizes and US Powerball / Mega Millions jackpots.
| Tax Provision | UK (National Lottery / EuroMillions) | US (Powerball / Mega Millions) |
|---|---|---|
| Tax at Payout | 0% Income Tax at payout | 24% mandatory IRS federal withholding upfront |
| Total Statutory Tax Rate | 0% Total Tax (0% CGT & 0% Income Tax) | 37% total federal tax (24% upfront + 13% additional top bracket true-up), plus 0% to 13% state tax |
| Lump Sum Haircut | 0% reduction (100% of advertised jackpot is paid immediately in cash) | ~50% haircut if cash option is chosen instead of 30-year annuity |
| Follow-on Savings Interest | Taxed at 20% (basic), 40% (higher), or 45% (additional rate) on bank interest once deposited | Subsequent earnings taxed under standard US federal (up to 37%) and state investment rules |
| UK Foreign Tax Credit Relief (FTCR) | Not applicable (UK tax liability is £0) | No FTCR available in the UK (HMRC charges £0 UK tax, so no foreign tax credit can offset the 37% US deduction) |
| Statutory Legal Authority | Section 51 TCGA 1992 (exempt from CGT), HMRC BIM22015 / Section 771 ITTOIA 2005 windfall precedent (non-trading gambling exemption) | Internal Revenue Code 26 U.S.C. § 3402(q) (withholding) and 26 U.S.C. § 1 (top marginal tax rate) |
If You Win £1 Million in the UK: How Much Tax Do You Pay?
If you win £1,000,000 on the UK National Lottery, Lotto, EuroMillions, or Thunderball, you pay exactly £0 in UK Income Tax or Capital Gains Tax at payout. The entire £1,000,000 is transferred into your bank account tax-free.
Under long-standing UK tax law and established HMRC precedent (including HMRC BIM22015 and Graham v Green), lottery prizes, gambling winnings, and NS&I Premium Bond prizes are classified as windfalls. They are not treated as earned income, employment earnings, or trading profits, so HMRC does not levy Income Tax or National Insurance contributions on the win.
What happens after the £1 million lands in your account?
While the initial windfall is completely tax-free, any income generated by that capital thereafter is taxable:
- Savings Account Interest: If you place £1,000,000 in a high-yield savings account at 4.0% AER, you earn £40,000 gross interest annually. As an additional rate (45%) taxpayer with £0 Personal Savings Allowance, you will pay £18,000 in Income Tax, keeping £22,000 net passive income (£1,833/month). Use our after-tax interest calculator to model exact interest yields.
- Investments & Dividends: Capital invested outside tax-free wrappers (like ISAs) is subject to Dividend Tax (up to 39.35% for additional rate taxpayers) and Capital Gains Tax on subsequent asset appreciation.
- Salary Comparison: A net passive income of £22,000/year from £1m savings interest provides the equivalent take-home pay of a standard £100,000 executive salary or higher when combined with other income streams. See our benchmarks for £250,000 and £500,000 earners.
If You Won $100 Million Dollars: How Much After Taxes (Powerball & Mega Millions)?
If you win an advertised $100,000,000 jackpot in the US Powerball or Mega Millions and choose the cash lump sum, you will take home approximately $31,500,000 (roughly £24.6 million) after US federal taxes.
Unlike the UK, the United States treats lottery winnings as ordinary taxable income. The headline $100 million figure is a 30-year graduated annuity. When selecting the immediate cash option, the payout is reduced by two major stages:
1. The Cash Option Haircut (~50%)
The advertised jackpot represents 30 graduated payments invested in US government bonds over 29 years. Taking the lump sum today reduces the gross prize to approximately 50%, or $50,000,000.
2. Federal IRS Income Tax (37%)
The IRS immediately withholds 24% ($12,000,000) at payout. However, because the top federal income tax bracket is 37%, you owe an additional 13% true-up ($6,500,000) when filing your return. Total federal tax is $18,500,000 (37%).
Crucial Cross-Border Rule: No UK Foreign Tax Credit
If a UK resident buys a winning US lottery ticket while visiting the United States, HMRC considers the prize tax-free in the UK (£0 UK liability). However, because your UK tax liability is nil, you cannot claim Foreign Tax Credit Relief (FTCR) under the UK/US Double Taxation Treaty to reclaim the 37% IRS tax. The IRS keeps every penny of the $18.5 million federal deduction.
What Taxes Apply After You Win the Lottery?
While the prize payment itself does not attract PAYE or Capital Gains Tax, establishing a multi-million-pound estate triggers three critical UK tax regimes:
1. Bank Savings Interest
Lottery winners earning over £125,140 have a £0 Personal Savings Allowance. All savings interest is taxed at the 45% additional rate. Holding funds in gilts or index funds can offer superior tax efficiency.
2. Investment Growth & CGT
Selling shares or property bought with winnings triggers Capital Gains Tax on profits exceeding your annual CGT allowance (£3,000 for 2026/27). Dividends outside ISAs are taxed up to 39.35%.
3. Gifting to Family (IHT)
Giving cash to relatives creates a Potentially Exempt Transfer (PET). If you survive 7 years, the gift is 100% tax-free. If death occurs earlier, taper relief applies to gifts above the nil-rate band.
Why a Written Syndicate Agreement Is Vital
If you play as part of an office or family syndicate, ensure an up-to-date, signed syndicate agreement is in place before tickets are purchased. If one person collects an eight-figure jackpot into their personal bank account and then distributes £1,000,000 each to colleagues, HMRC may treat those payments as individual gifts rather than syndicate shares, triggering potentially devastating 40% Inheritance Tax liabilities if the ticket-buyer dies within 7 years.
Frequently Asked Questions: UK & US Lottery Tax
Clear answers based on official HMRC rules and statutory guidance.
This guide provides statutory UK tax and payroll analysis for the 2026/27 tax year. Lottery winnings and cross-border windfalls involve complex estate and international tax considerations; winners should always consult an authorised UK tax solicitor and chartered accountant.
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Visit Blog HubPrize tax and later investment tax differ
A UK lottery or gambling prize and the income later earned from it have different tax questions. Interest, dividends, gifts and foreign prizes need separate treatment.
Do not assume a UK tax illustration decides overseas withholding, treaty relief, residence or Inheritance Tax. A cash-versus-annuity scenario depends on the stated exchange, return and timing assumptions.
Check the rules for your circumstances
Official guidance supports the rules described here; it does not approve or certify this calculator. Confirm dates, eligibility and unsupported cases before making a financial decision.