Mega Millions Payout Calculator (After Tax)
Estimate your Mega Millions take-home pay after federal and state taxes for both the lump-sum cash option and the 30-year annuity option.
How to use this tool
- Enter advertised jackpot, cash option (% of jackpot), federal tax rate and state tax rate in the fields above.
- Results update instantly as you type โ or click Calculate.
- Read your lump sum net (after tax) and the full breakdown beneath it.
โ This tool provides general estimates for education only and is not financial, tax or legal advice. Figures may not reflect your situation โ verify with a qualified professional.
Formula
Lump Sum Gross = Jackpot ร Cash Option %
Lump Sum Net = Lump Sum Gross ร (1 โ Federal Rate โ State Rate)
Annuity Annual = Jackpot / 30 payments
How it works
Mega Millions offers winners a choice between a one-time lump-sum cash option (typically about 60% of the advertised jackpot) and a 30-year graduated annuity paid in 30 annual installments. This calculator applies federal and state income tax rates to both options to estimate after-tax proceeds. Note that actual state tax rates vary by state, and some states (e.g., California, Texas) do not tax lottery winnings; consult a tax professional for personalized advice.
Worked example
$500 million jackpot, 60% cash option, 37% federal + 5% state tax
- Lump sum gross = $500,000,000 ร 60% = $300,000,000.
- Federal tax = $300,000,000 ร 37% = $111,000,000.
- State tax = $300,000,000 ร 5% = $15,000,000.
- Total tax = $111,000,000 + $15,000,000 = $126,000,000.
- Lump sum net = $300,000,000 โ $126,000,000 = $174,000,000.
After-tax lump sum is $174,000,000; annuity pays $16,666,667/year ($9,666,667 after tax).
Common mistakes to avoid
- Assuming the advertised jackpot is received as cash โ the jackpot is the annuity value; the cash option is typically 60% of the advertised amount before taxes.
- Forgetting that the 24% federal withholding does not represent final federal tax liability; winners in the 37% bracket owe an additional 13% on filing, which is often overlooked in take-home estimates.
- Ignoring state tax entirely or assuming it is the same across all states โ some states (California, Florida, Texas) do not tax lottery winnings, while others (New York, Maryland) impose substantial rates exceeding 8%.
Key terms
- What is the cash option for Mega Millions?
- The cash (lump-sum) option is a one-time payment of the present cash value of the jackpot, typically around 60% of the advertised jackpot amount, because the advertised figure assumes 30 years of investment returns on annuity payments.
- How many payments does the annuity have?
- The Mega Millions annuity is paid over 29 years (30 payments total): one immediate payment plus 29 annual payments, each 5% larger than the previous year.
- Which states do not tax lottery winnings?
- As of 2025, California, Florida, Texas, Washington, Wyoming, South Dakota, Tennessee, and New Hampshire do not tax state lottery winnings, though federal tax still applies.
- What federal tax rate applies to lottery winnings?
- Lottery winnings are taxed as ordinary income. The top federal marginal rate is 37% for 2025. An automatic 24% federal withholding applies at the time of payment, with the remainder due at tax filing.
Frequently asked questions
- Is the annuity payout always 30 payments over 30 years for Mega Millions?
- Yes. Mega Millions annuity is paid as one immediate payment followed by 29 annual payments, with each payment increasing by 5% per year. The first payment is smaller and later payments are larger.
- Which option โ lump sum or annuity โ is better financially?
- It depends on your investment return assumptions and tax situation. If you can invest the lump sum at returns exceeding roughly 5% annually after taxes, the lump sum may produce more wealth. The annuity protects against spending the entire prize and locks in payments even if markets underperform.
- Can lottery winnings push me into a higher tax bracket on other income?
- Yes. Lottery winnings are ordinary income. A large prize adds to all other income in that tax year, potentially pushing wages, dividends, or other income into higher brackets as well.