Article — Mega Millions Payout Calculator
Mega Millions payout calculator: lump sum, annuity, and after-tax take-home
A $500 million Mega Millions jackpot pays out about $275M in cash (55% of the advertised number) before any tax. The 2025 federal top bracket of 37% removes roughly $101M, leaving $174M in a no-tax state. New York City residents lose another $40.6M to state and city tax, dropping the take-home to about $133M. The annuity option spreads the full $500M across 30 graduated payments that grow 5% per year, starting at $7.53M and ending at $31M before tax.
Enter the advertised jackpot, pick lump sum or annuity, choose your state, and the calculator runs the 2025 IRS brackets and the Mega Millions annuity schedule. Default cash ratio is 55%, in line with the April 2025 game redesign.
What the Mega Millions payout includes
The number on the Mega Millions billboard is the advertised jackpot, which is the total of the 30-year annuity. It is never the cash you get. A winner who picks lump sum receives the cash value, which is what Mega Millions can buy in Treasury bonds today to fund the 30-year payments. Treasury yields drive the ratio; in 2025 it sits between 50% and 60% of the advertised number, with the April 2025 game change pushing the average toward the lower end.
A winner who picks the annuity receives 30 yearly payments. Each payment is 5% larger than the prior year, so the gap between year 1 and year 30 is a factor of 1.05^29 = 4.12. The 30 payments add up to the advertised jackpot.
Mega Millions lump-sum cash value
The lump sum is the option roughly 95% of jackpot winners pick. The cash value is computed by Mega Millions before each drawing using a formula based on current US Treasury yields. Higher yields = lower cash ratio because bonds are doing more of the work to fund the annuity. The historical range is about 45-65%; the calculator above defaults to 55% but lets you adjust the percentage.
Cash value = Jackpot × 0.50-0.60Federal tax (37%) = Cash × 0.37 (top bracket)State tax = Cash × state rate (0-14.78%)Take-home = Cash × (1 − 0.37 − state)$500M billboard ≈ $174M (no-tax) or $133M (NYC)Mega Millions 30-year annuity
Mega Millions' official annuity schedule pays 30 installments that grow 5% per year. The growth schedule has been in place since 2014. The first payment is the advertised jackpot divided by the annuity factor S_30 = (1.05^30 − 1)/0.05 ≈ 66.4388. For a $500M jackpot, that puts the first payment at $7.526M and the final year at $30.96M.
This is exactly the schedule the calculator runs when you flip the toggle to annuity. The 30-row table below the summary shows the gross payment, federal tax, state tax, and net for every year. The total of the gross column equals the advertised jackpot.
The largest Mega Millions jackpot ever was $1.602 billion, won August 8, 2023, by a single ticket from Neptune Beach, Florida. Florida has no state income tax, so the winner's after-federal take-home on the $794M cash value was roughly $500M — close to the full advertised amount of a typical $500M jackpot. The same ticket sold in New York City would have netted about $410M.
Federal tax on a Mega Millions payout
Any Mega Millions win above $5,000 is subject to mandatory IRS withholding at 24%. That is not the final tax. The 2025 top federal bracket is 37%, hit at $626,350 of single-filer taxable income (Revenue Procedure 2024-40). A jackpot win blasts past that threshold by orders of magnitude, so the effective federal rate sits right at 37%.
This is where most winners get blindsided. The IRS pulled out 24% at payout, but the IRS wants 37%. That 13-percentage-point gap is owed on April 15 the following year. On a $275M cash value, the true-up bill is about $36M — not a figure most people can absorb without planning ahead.
The IRS only withholds 24% of a Mega Millions payout, but top-bracket winners owe 37%. Set aside the 13-point difference the day the check clears. Several Mega Millions winners have ended up in IRS collections because they spent or invested the full payout assuming 24% was the final tax.
State tax on a Mega Millions payout
State tax on Mega Millions winnings ranges from 0% to 14.78%. Eight states impose no income tax at all on lottery winnings: Florida, Texas, Washington, Wyoming, South Dakota, Tennessee, and New Hampshire (Alaska does not sell Mega Millions tickets). California is unusual: state income tax is 13.3% at the top, but lottery winnings are specifically exempt.
The most expensive state to win in is New York. The state rate is 10.9%, and New York City residents add another 3.876% city tax for a total of 14.78%. On a $275M cash value, that adds up to about $40.6M in state and city tax alone — nearly four times what an Arizona winner would pay.
Lump sum vs annuity
The lump sum gives the winner full control. After tax, the cash can be invested at market rates, which historically beat the 5% annuity growth rate. The annuity locks in 30 years of guaranteed +5% growth, with the side benefit of forcing a winner to spend gradually rather than splurging in year one.
- Lump sum — ~50-60% of advertised, paid once, taxed once at 37% federal top
- Annuity — 100% of advertised, paid over 30 years, each payment +5% over prior
- Bankruptcy risk — lump-sum winners are 5-8x more likely to file bankruptcy within five years (per studies cited in the JEL)
- Inheritance — annuity payments transfer to the estate on death of the winner
- Tax-rate risk — annuity locks in 30 years of federal tax exposure; rates may rise
- Election deadline — winners typically have 60 days from claim to choose; default is annuity in most states
Common Mega Millions payout mistakes
The most common mistake is confusing the advertised jackpot with the cash payout. The billboard number is the 30-year annuity total, not what shows up in a winner's bank account. The second-most-common mistake is forgetting the 13-point federal true-up at April tax time, which has bankrupted winners who confidently spent the post-withholding 76% of the cash value before realizing they actually owed 63%.
The day the lottery check clears, transfer the federal true-up (about 13% of the cash value) and any state tax owed into a separate Treasury-only account at a brokerage. Do not touch it until tax season. This single step prevents the most common Mega Millions financial disaster.
Lottery wins also have a quirky relationship to ticket location. A few states tax winners based on the state where the ticket was purchased, not where the winner lives. New Jersey, for example, applies its own withholding to non-residents who win in NJ, even though residency tax credits usually balance this out at filing time. Consult a CPA before claiming any multi-state Mega Millions win.