# Retire at 50 Calculator

> How much you need to retire at 50, how much to have invested today to coast there, and how to reach your money in the 15 years before Medicare.

Source: https://mycoastfire.com/retire-at-50
Last updated: 2026-09-24

Retiring at 50 means your money has to last 40 years or more, and most of it sits in accounts you can't touch freely until 59½. The calculator is set to a 3.5% withdrawal rate for that reason.

To retire at 50 on $60,000 a year, you need about $1,714,286 invested, using the 3.5% withdrawal rate I’d plan on for a retirement that could run 45 years. The familiar 4% rule says $1,500,000, but it was built on 30-year retirements, and a 50-year-old’s money has to last a lot longer than that.

## How much do you need to retire at 50?

Your FIRE number is your yearly spending divided by your withdrawal rate. Here’s what that looks like at a few spending levels, in today’s dollars:

| Yearly spending | At a 4% withdrawal rate | At 3.5% |
| --- | --- | --- |
| $40,000 | $1,000,000 | $1,142,857 |
| $50,000 | $1,250,000 | $1,428,571 |
| $60,000 | $1,500,000 | $1,714,286 |
| $80,000 | $2,000,000 | $2,285,714 |
| $100,000 | $2,500,000 | $2,857,143 |

The 4% figure comes from [William Bengen’s 1994 paper](https://www.financialplanningassociation.org/sites/default/files/2021-04/MAR04%20Determining%20Withdrawal%20Rates%20Using%20Historical%20Data.pdf). Using a half-stock, half-bond portfolio and U.S. market history back to 1926, he found that a 4% first-year withdrawal, raised each year for inflation, never ran out in less than 33 years. That’s fine for someone retiring at 65. For you, 33 years ends at 83.

The same paper found that withdrawal rates up to about 3.5% lasted at least 50 years in every period he looked at. The [Trinity Study](https://www.aaii.com/journal/199802/feature.pdf) that came later only tested payout periods up to 30 years, so it doesn’t tell you much about a 45-year retirement either way. That’s why the calculator above starts at 3.5%. You can change it under Assumptions, but I wouldn’t go higher unless you’re willing to cut spending in bad years or earn some income later on.

The price of that caution is real: at $60,000 a year, going from 4% to 3.5% adds $214,286 to the target.

## How much do you need invested now to coast to 50?

Coast FIRE flips the question: how much would you need today so that, without adding another dollar, growth alone gets you to your number by 50? With $60,000 of spending, 7% returns and 3% inflation:

| Your age now | Coast FIRE number at 3.5% | At 4% |
| --- | --- | --- |
| 25 | $661,332 | $578,665 |
| 30 | $800,115 | $700,100 |
| 35 | $968,021 | $847,019 |
| 40 | $1,171,164 | $1,024,768 |
| 45 | $1,416,937 | $1,239,820 |

At 45, the Coast FIRE number is already 83% of the full target, because five years isn’t much time for growth to help. Coasting to 50 is really a plan for people in their twenties and early thirties. After about 40, you’re mostly just saving for FIRE.

## When would Andre hit his Coast FIRE number?

Andre is 30, has $120,000 invested and puts in $5,000 a month. He wants to stop at 50 and spend $60,000 a year. His Coast FIRE number today is $800,115, and at that pace he crosses it at 44. From then on he could stop contributing, let the balance grow and still have about $1,718,000 at 50.

Small changes move that date a lot:

| What changes | Coast FIRE age |
| --- | --- |
| Nothing: $5,000 a month, 3.5% | 44 |
| He invests $4,000 a month instead | Not before 50 |
| He plans on a 4% withdrawal rate | 42 |
| He plans on $50,000 a year of spending | 41 |

At $4,000 a month he’d reach about $1,694,000 by 50, a little short of his target, and only by saving every month until then. That’s regular FIRE, not Coast FIRE.

I’ll be blunt about the $5,000. Retiring at 50 on $60,000 a year takes a high income, two incomes, or a much lower spending number. And where that money goes matters as much as how much there is, which is the next problem.

## Can you get at your money before 59½?

Most withdrawals from a 401(k) or IRA before 59½ carry a [10% additional tax](https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-exceptions-to-tax-on-early-distributions) on top of income tax. From 50 to 59½ is nine and a half years. At $60,000 a year that’s $570,000 you need to reach without paying it, about a third of Andre’s target.

These are the ways in:

-   A regular brokerage account. No age rules at all. I think it’s the most underrated account for anyone planning to stop at 50, even though it has no tax break going in.
-   Roth IRA contributions. [IRS Publication 590-B](https://www.irs.gov/publications/p590b) treats withdrawals of your regular contributions as coming out first, and they aren’t taxed. The earnings have to stay in.
-   A Roth conversion ladder. Move money from a traditional IRA to a Roth IRA and pay income tax on it that year. Each conversion gets its own five-year clock, starting January 1 of the year you convert, before you can take it out without the 10%. Convert at 50 and that money is available at 55, so you still need five years of spending from somewhere else first.
-   72(t) payments. [Substantially equal periodic payments](https://www.irs.gov/retirement-plans/substantially-equal-periodic-payments) avoid the 10%, but they have to continue until five years have passed or you reach 59½, whichever is later. Start at 50 and you’re locked in for nine and a half years. Change the amount and you owe the 10% on everything you’ve taken, retroactively.
-   A governmental 457(b). If you work for a state or local government, distributions from its 457(b) plan aren’t subject to the 10% additional tax once you leave, except for money you rolled in from other plans.

The rule of 55 doesn’t help if you leave at 50. The one exception is public safety workers, such as police officers and firefighters in a state or local government plan, for whom the IRS sets the age at 50.

## Fifteen years before Medicare

[Medicare starts at 65](https://www.medicare.gov/basics/get-started-with-medicare), so retiring at 50 means buying your own health insurance for 15 years. COBRA can keep your old employer’s plan for up to [18 months](https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/resource-center/faqs/cobra-continuation-health-coverage-workers), at the full premium plus 2%. After that it’s almost always a Marketplace plan, and those can cost [up to three times as much](https://www.healthcare.gov/how-plans-set-your-premiums/) for older enrollees as for younger ones, so the bill climbs through your late 50s.

Marketplace subsidies depend on income, not on how much you have invested. That makes the accounts above matter twice: spending brokerage principal or Roth contributions adds little or nothing to your taxable income, while Roth conversions and 72(t) payments add all of it. Our [guide to health insurance before 65](https://mycoastfire.com/blog/coast-fire-health-insurance-before-65) covers the subsidy rules. I’d still build the plan so it works at full price.

## What retiring at 50 does to Social Security

The earliest you can claim is 62, twelve years after you stop, and claiming then cuts your check by [30% for anyone born in 1960 or later](https://www.ssa.gov/benefits/retirement/planner/agereduction.html). The quieter hit comes first. Your benefit is based on your highest 35 years of earnings, and [a zero goes in for each missing year](https://www.ssa.gov/benefits/retirement/planner/stopwork.html). Start working at 23 and stop at 50 and you have 27 years of earnings, so eight zeros go into the average.

Your Social Security statement won’t show that, because its estimates [assume you keep earning your current pay](https://www.ssa.gov/policy/docs/briefing-papers/bp2020-01.html) until you claim. For a plan that starts at 50, I’d ignore Social Security for the bridge entirely and count only part of it from 67. The [Coast FIRE calculator with Social Security](https://mycoastfire.com/coast-fire-calculator-with-social-security) lets you enter a reduced figure and see what it’s worth.

Test Andre against bad markets

The calculator above assumes a steady 7%. The Monte Carlo version shows how often he’d still reach his number by 50 when returns bounce around.

[Open the Monte Carlo calculator](https://mycoastfire.com/coast-fire-monte-carlo-calculator)

## Where this math breaks

Everything above assumes returns arrive smoothly and that $60,000 a year covers your taxes and health insurance as well as everything else. Neither is safe. A bad market in your first few years without a paycheck does more damage than the same drop at 65, because you have more years left to fund from a smaller balance.

Flexibility does more for an early retirement than a perfect withdrawal rate. If you’d take some part-time or consulting income in your 50s, even $15,000 or $20,000 a year, your portfolio has to do much less, and the [Barista FIRE calculator](https://mycoastfire.com/barista-fire-calculator) shows how much less. Planning to retire at 50 with no room to earn or cut anything is the version I’d be most nervous about.

Planning a different age? [Retire at 40](https://mycoastfire.com/retire-at-40), [Retire at 45](https://mycoastfire.com/retire-at-45), [Retire at 55](https://mycoastfire.com/retire-at-55), [Retire at 60](https://mycoastfire.com/retire-at-60).For the years before 59½, see the [rule of 55 calculator](https://mycoastfire.com/rule-of-55-calculator).

## Questions people ask

### How much do I need to retire at 50 on $50,000 a year?

About $1.43 million at a 3.5% withdrawal rate, or $1.25 million at 4%. That's in today's dollars and assumes your portfolio pays for everything until Social Security starts. Add health insurance to the $50,000 if your current employer pays for it now.

### Can I use my 401(k) if I retire at 50?

Not freely. Withdrawals before 59½ generally carry a 10% additional tax on top of income tax. The main ways around it are substantially equal periodic payments under 72(t), a governmental 457(b) plan, and the age-50 separation rule for certain public safety employees. The rule of 55 doesn't help if you leave at 50.

### Is the 4% rule safe if I retire at 50?

It's thinner than it looks. William Bengen's 1994 research found 4% never ran a 50/50 portfolio dry in less than 33 years, which gets a 50-year-old to 83. He found rates up to about 3.5% lasted at least 50 years in every period he tested, which is why this page uses 3.5%.

### When can I get Social Security if I retire at 50?

Not until 62, and claiming then cuts your monthly benefit by 30% for good if you were born in 1960 or later. Your benefit will also be smaller than your statement shows, because the estimate assumes you keep working until you claim.

## Keep reading

-   [Retire at 55Where the rule of 55 does most of the work.](https://mycoastfire.com/retire-at-55)
-   [Health insurance before 65Your options for the 15 years before Medicare.](https://mycoastfire.com/blog/coast-fire-health-insurance-before-65)
-   [4% rule calculatorSee how long a withdrawal rate lasts.](https://mycoastfire.com/4-percent-rule-calculator)