Know if your money
will last.

Monte Carlo simulation meets real tax law. See thousands of possible futures for your finances—the full range of possibilities.

Portfolio ValueYears0102030Median outcomeLikely rangePossible range10,000 simulations

Each line is a possible future. Which one will be yours?

Go beyond the average.

Most financial calculators show one number: your “expected” outcome. But markets don’t move in averages—they crash, they boom, they surprise. A single projection hides the range of outcomes that could shape your financial future.

2xdifference between good and bad market sequences with identical average returns
$400K+gap between 25th and 75th percentile outcomes on a $1M portfolio

What makes EggNest different

10,000 simulations

Not one projection—thousands. See the full range of what could happen based on historical market behavior.

Real tax calculations

Powered by PolicyEngine. Actual federal and state tax law—not estimates. See your true after-tax income.

Longevity-aware

Accounts for time horizons and life expectancy. Near-term outcomes weighted appropriately.

Household planning

Planning with a partner? Model both of you—different ages, incomes, and benefits.

Multiple income sources

Employment income, Social Security, pensions, and more. See how they all interact with taxes.

Annuity comparison

Should you buy an annuity or invest? Compare guaranteed income vs. market upside with real numbers.

How it works

1

Enter your situation

Age, savings, income sources, state. Takes about 2 minutes.

2

We simulate 10,000 futures

Using historical market data and actual tax law to model your financial trajectory.

3

See your probability of success

Not just "you'll be fine"—the actual percentage chance your money lasts, with the full distribution of outcomes.

See the full picture. Make better decisions.

Free to use. No account required. Results in 30 seconds.

Run your simulation