Retirement guide
Can I retire at 40?
Retiring at 40 has less to do with picking great investments than with the gap between what you earn and what you spend. The calculator below starts from an aggressive saver's plan — change any number and watch the answer move.
Retiring at 40 is a savings-rate problem
The plan on this page belongs to a 30-year-old with $200,000 invested who saves $100,000 a year and expects to live on $40,000 a year after stopping. That combination is what people mean by FIRE — Financial Independence, Retire Early. The dollar figures are large, but the ratio is the part that matters: this person banks more than twice what they spend.
In the first years of a plan like this, the money you add matters far more than the return you earn, simply because the balance is still small next to the deposit. That is why the savings rate is the lever early retirees pull hardest. It is also why cutting spending helps twice over — it frees up money to invest now, and it lowers the bill your portfolio has to cover for the rest of your life.
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Retirement outlook
You could retire at 41.
Retiring at 40, your money lasts to 100 in 74% of market scenarios — typically with about $1.7M to spare.
Today
Retirement
Markets
Projected net worth to 100, in today’s dollars
Today’s dollarsat% inflationSixty years is the part that breaks plans
Stop at 40 and the money has to last to 100 in this model — sixty years of withdrawals with no salary behind them. The tool runs your plan through 1,000 simulated market histories, a technique called Monte Carlo simulation, drawing each year's return at random around the return you expect. It only calls a retirement age workable when at least 80% of those runs still have money at 100.
The starting plan above lands at about 74%, so the headline reads 41 rather than 40. One more year of saving instead of spending is enough to clear the bar, and that sensitivity is the real lesson. Order matters as much as averages: a bad decade immediately after you stop working does far more damage than the same decade twenty years later, because you are selling from a shrinking balance. That is called sequence risk, and showing it is exactly what a spread of simulated paths is for.
What the calculator does not know about 40
Two large omissions cut in opposite directions. The model ignores taxes, which makes any plan look easier than it is. It also ignores Social Security, which makes plans look harder — the spending figure you enter is treated as money drawn from savings on top of whatever Social Security eventually pays.
At 40 that second point is doing heavy lifting, because Social Security cannot start until 62 and Medicare not until 65. For the first twenty-odd years you really are funding everything yourself, health insurance included. The model also holds spending flat forever, while most early retirees earn something along the way. Treat the result as a way to explore how the pieces interact, not as financial advice.
Questions people ask
- How much do I need to retire at 40?
- The common shorthand is 25 times your yearly spending, which comes from the 4% rule — $1 million on a $40,000 budget. This calculator is stricter, because it funds you to 100 rather than for 30 years: arriving at 40 with about $1.56 million is what reaches 80% confidence on a $40,000 budget. The plan on this page is likely to land near that figure, and its 74% odds mostly reflect the chance that ten years of saving do not go as planned.
- Is the 4% rule safe for a 60-year retirement?
- The 4% rule came out of studies of 30-year retirements. Stretch the same withdrawal rate over twice that long and there are twice as many chances to hit a bad stretch with no income left to absorb it. Most early-retirement writing suggests something closer to 3% to 3.5%. You can test both here by changing the spending figure.
- What savings rate do I need to retire at 40?
- In the plan above, the saver puts away roughly 70% of what is left after covering $40,000 of living costs. Starting at 30 with little saved, retiring at 40 generally means saving well over half your take-home pay. Raising savings from $100,000 to $120,000 a year moves this plan from about 74% odds to about 83%.
- How do I get health insurance if I retire at 40?
- Not through Medicare, which starts at 65. Early retirees usually buy coverage on the individual market, and that premium belongs inside the spending number you enter. This tool has no separate line for health costs, so fold them into the yearly figure.
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The assumptions behind these numbers
Every figure comes from 1,000 simulated market paths assuming a 6% average yearly return in retirement (10% while still saving) with year-to-year swings scaled to those returns, and 3% inflation — so every dollar reads as today’s dollars, and “works” means the money lasts to age 100 in at least 80% of paths.
Social Security, pensions, and taxes aren’t modeled. If you expect income from those, your real answer is better than the one on this page. For exploring, not financial advice.