Coast FIRE Calculator
Calculate your Coast FIRE number — the amount you need invested today to never contribute again and still retire comfortably. Free retirement calculator.
Reviewed for accuracy by Marcus Webb and the Blueprint Dynamics editorial team (last updated July 2026). Our calculators use primary-source formulas and are cross-checked against IRS publications, Fannie Mae guidelines, and Federal Reserve data. Learn more about our methodology.
Source: Federal Reserve, Freddie Mac, Bankrate national averages. Rates are approximate ranges for borrowers with good credit (700+). Actual rates depend on your credit score, loan-to-value ratio, and lender.
Find the amount you need invested now to never contribute again and still retire comfortably
Coast FIRE Number
$160,852
You need $80,852 more to coast to retirement in 33 years.
FIRE Number
$1,500,000
Projected at Retirement
$746,027
Years to Grow
33 yrs
What is Coast FIRE?
Coast FIRE is the point at which your invested assets are large enough that, given enough time and compound growth, they will reach your retirement target on their own — without another dollar of new contributions. Once you hit your Coast FIRE number, you only need to earn enough to cover your current living expenses. You no longer need to save for retirement. This milestone is what gives "coasting" its name: you've done the hard accumulation work, and the market will do the rest while you coast.
How the Coast FIRE number is calculated
Coast FIRE number = Retirement target / (1 + r)^n. Where r is the expected annual real (inflation-adjusted) return and n is the number of years until retirement. If your retirement target is $1,500,000, you plan to retire in 30 years, and you assume a 7% real return: Coast FIRE number = $1,500,000 / (1.07)^30 = $1,500,000 / 7.612 = $197,000. That means if you have $197,000 invested today and never contribute another dollar, compound growth at 7% real will deliver $1,500,000 by retirement.
Why compound growth is the key
The math is entirely powered by compound growth over a long time horizon. A 30-year-old who invests $150,000 at a 7% real return will have roughly $1.14 million by age 65 — without adding anything. A 25-year-old with the same amount gets 40 years of compounding and arrives at $2.24 million. The earlier you hit your Coast number, the more of your remaining working life you can redirect away from aggressive savings toward covering living expenses only. The Coast FIRE milestone is particularly powerful for people who want to work, just not at a job they dislike.
Coast FIRE vs. full FIRE
Full FIRE (Financial Independence, Retire Early) means your invested assets can sustain all your expenses indefinitely using the 4% withdrawal rule — you don't need to work at all. Coast FIRE is a lower, earlier milestone: your investments are on track, but you still need income to cover expenses. Many people find Coast FIRE more achievable and use it as a stepping stone — once coasting, they transition to part-time work, freelancing, or lower-stress jobs that cover the bills without requiring high savings contributions. Barista FIRE is a related concept: working a part-time job for income and benefits while your investments compound.
How to reach Coast FIRE faster
The two levers are: (1) Increase your invested balance through aggressive early saving — front-loading retirement savings in your 20s and 30s is exponentially more impactful than the same dollars saved in your 40s. (2) Lower your retirement target by reducing your expected retirement spending — which also reduces the Coast number proportionally. Tax-advantaged accounts (401k, Roth IRA) accelerate reaching the Coast number by deferring taxes, effectively compounding more dollars for longer.