Settlement Investment Growth Calculator: Future Value of an Invested Lump Sum
Work out what a legal settlement or lump sum could become if you invest it and leave it to compound — rather than spending it down. The result is the future value and the growth it earns over the period.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Future value | Total growth |
|---|---|---|
| $50k · 7% · 10yr | $98,357.57 | $48,357.57 |
| $100k · 6% · 20yr | $320,713.55 | $220,713.55 |
| $25k · 8% · 15yr | $79,304.23 | $54,304.23 |
| $250k · 5% · 25yr | $846,588.74 | $596,588.74 |
How This Calculator Works
Enter the amount you received (net of tax and legal fees), the annual return you expect, and how many years it will stay invested. The calculator compounds the lump sum at that rate and shows the ending value and the total growth.
The Formula
Future Value of a Lump Sum
PV = present value, r = annual rate, n = number of years
Worked Example
A $50,000 settlement invested at 7% for 10 years grows to about $98,358 — nearly doubling, with $48,358 of growth, without adding a cent. Compounding does the work: the longer the money stays invested and untouched, the more the growth curve steepens. A settlement treated as an investment rather than a windfall to spend is one of the clearest ways a one-time event builds lasting wealth.
Key Insight
Lump sums from settlements, inheritances, or sales are pivotal moments — the decision to invest versus spend often determines whether the money changes your financial trajectory or briefly inflates your lifestyle. The math favors patience dramatically: at 7%, money roughly doubles every decade, so a 20-year horizon nearly quadruples the amount. The caveats: this is a nominal return (inflation erodes real purchasing power), markets don't deliver 7% smoothly, and structured settlements paid as an annuity have different mechanics. For money you genuinely won't need for years, a diversified low-cost portfolio is the standard route to capture this growth.
Frequently Asked Questions
How is the future value calculated?
The lump sum is multiplied by (1 + annual return) raised to the number of years. $50,000 at 7% for 10 years is $50,000 × 1.07¹⁰ ≈ $98,358.
Should I invest a settlement or spend it?
Depends on need, but the math strongly favors investing money you don't need now. At 7%, a lump sum roughly doubles every decade. Pay off high-interest debt first, keep an emergency buffer, then invest the rest for the long term to capture compounding.
Is a settlement taxable?
It depends on the type. Compensation for physical injury is often tax-free; punitive damages, interest, and lost-wages portions are usually taxable. Enter the net amount after any tax for an accurate projection, and consult a tax professional on your specific settlement.
What return should I assume?
The default reflects a long-run diversified equity return (around 7% nominal), but actual returns vary widely year to year and aren't guaranteed. Use a more conservative figure (4% to 5%) for money you may need sooner or can't afford to see drop.
Does this account for inflation?
No — it shows nominal growth. At 3% inflation, $98,358 in 10 years has the buying power of roughly $73,000 today. To see real (inflation-adjusted) growth, use a return net of inflation, for example 4% instead of 7%.
Related Calculators
Data Sources & Benchmarks
This calculator draws on 1 independent, dated source. The starting values for expected annual return are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
Future value is the lump sum compounded at the annual return over the period. It assumes the full amount is invested at once, left untouched, and earns a constant return; it ignores tax, fees, inflation, and any withdrawals.
Written by Ugo Candido · Last updated May 22, 2026.