Lump Sum vs Annuity Calculator
Find out which payout option is better — take the cash now or receive guaranteed payments over time.
| Year | Lump Sum Value | Annuity Cumulative | Lump Sum Lead | Annuity Lead |
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How to Use This Lump Sum vs Annuity Calculator
Enter your lump sum offer and the applicable tax rate, then provide your annuity's annual payment, duration, and its tax rate. Set your expected investment return and inflation rate, then drag the horizon slider to choose how many years to compare. Click Calculate & Compare to see which option puts more money in your pocket.
Why This Matters
The lump sum vs annuity question comes up in several major life moments: lottery winnings, pension decisions, lawsuit settlements, and inherited accounts. The math isn't always obvious — and the wrong choice can cost you hundreds of thousands of dollars.
Consider a $500,000 lottery lump sum vs a $35,000-per-year annuity for 25 years. The annuity totals $875,000 on paper — but after tax and adjusted for what you could earn investing the lump sum at 7% annually, the lump sum can be worth nearly $1.2 million by year 25. Conversely, if you're a poor saver, the guaranteed income of an annuity might protect you from spending everything at once.
Retirees facing pension buyouts use this exact comparison every year. A 62-year-old offered a $300,000 lump sum vs $1,800/month for life needs to know their "break-even" age — typically around 13–15 years out. This calculator makes that visible with a full year-by-year table.
How It's Calculated
Lump Sum After-Tax: Net Lump Sum = Lump Sum × (1 − Tax Rate)
Lump Sum Future Value each year: FV = Net Lump Sum × (1 + Investment Return)^Year
Annuity After-Tax each year: Net Annual Payment = Payment × (1 − Annuity Tax Rate)
Annuity Accumulated Value each year: The net payments are assumed to be invested at the same return rate as they're received. Cumulative value = sum of each year's net payment compounded forward.
Inflation-Adjusted Present Value: All future values are divided by (1 + Inflation Rate)^Year to show real purchasing power. The winner is determined by comparing inflation-adjusted totals at your selected horizon.
Tips & Common Mistakes
- Don't ignore taxes. Lump sums are often taxed at the highest bracket all at once, while annuity payments may land in lower brackets spread over time — or vice versa for pension buyouts.
- Be honest about your investment return. Using 10% or 12% is unrealistic for most people. A conservative 5–7% for a diversified portfolio is more appropriate.
- Factor in your age and health. Annuities pay most if you live longer than expected. If longevity runs in your family, annuities become more valuable.
- Don't forget inflation. A fixed $30,000/year payment in 20 years has the purchasing power of roughly $16,600 today at 3% inflation.
- Check for cost-of-living adjustments (COLA). Some annuities have annual increases baked in — if yours does, it's more valuable than this calculator assumes with a fixed payment.
Frequently Asked Questions
Is the lump sum always better if you invest it wisely?
Not always. If your investment return is lower than the "implied return" embedded in the annuity (total payments ÷ lump sum, annualized), the annuity wins. The break-even return rate is often 4–6% — achievable but not guaranteed. A guaranteed annuity also eliminates sequence-of-returns risk.
What discount rate should I use for comparison?
Use a realistic after-inflation, after-fee return for your portfolio. For a conservative retiree, 4–5% is common. For someone comfortable with a balanced stock/bond mix, 6–7% is reasonable. Avoid using historical stock market peaks — your actual returns will vary.
How do lottery lump sums typically work?
Lottery "cash option" lump sums are usually 50–60% of the advertised jackpot, before federal tax of 37% plus state taxes. So a $1 million jackpot may net you $300,000–$350,000 after tax. The annuity option pays out the full amount over 20–30 years but is also taxed as received each year.
Can I use this for pension buyout decisions?
Yes — enter your pension buyout offer as the lump sum, and your monthly pension × 12 as the annual annuity payment. Set the payment duration to your expected years in retirement. The calculator will show you which option accumulates more value and your crossover point.