CoastFIRE at Age 25: The Complete Guide
By Minh · Updated 2026-04-25 · 6 min read
You're 25. Retirement is 40 years away. The CoastFIRE question is simple: how much do I need invested today so I can stop saving and still retire on time?
This guide answers that for several income levels, walks through what to prioritize at age 25 specifically, and shows how the compound math actually works at this stage of your life.
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CoastFIRE Numbers at Age 25 by Income
The table below shows your CoastFIRE target at age 25 based on your current household income, assuming you'll spend 60% of that in retirement and earn 5% real return:
| Current Income | Retirement Spend | Total FIRE # | CoastFIRE Today |
|---|
| $50,000 |
$30,000 |
$750,000 |
$106,534 |
| $60,000 |
$36,000 |
$900,000 |
$127,841 |
| $75,000 |
$45,000 |
$1,125,000 |
$159,801 |
| $100,000 |
$60,000 |
$1,500,000 |
$213,069 |
| $125,000 |
$75,000 |
$1,875,000 |
$266,336 |
| $150,000 |
$90,000 |
$2,250,000 |
$319,603 |
| $200,000 |
$120,000 |
$3,000,000 |
$426,137 |
| $250,000 |
$150,000 |
$3,750,000 |
$532,671 |
Click any income level for a deeper breakdown specific to that scenario.
Why Age 25 Matters
At 25, you have 40 years of compounding available before traditional retirement age. Every dollar you invest today will grow to roughly 7.04× in real (after-inflation) value by 65.
The compounding leverage: $10,000 invested at age 25 becomes $70,400 by age 65 (today's dollars), assuming 5% real return. The same $10,000 invested 10 years later becomes only $43,219 — a 63% penalty for waiting a decade.
You're in the highest-leverage decade for retirement saving. Money you invest in your 20s and early 30s does roughly 4–6× the work of money invested in your 40s, simply because of how compound growth stacks. This is the time to be aggressive — high savings rate, all-equity portfolio, max every tax-advantaged vehicle you can.
What to Prioritize at Age 25
- Capture every dollar of employer match. A 50% match is a 50% guaranteed return — nothing else in finance comes close.
- Max your Roth IRA ($7,000/yr in 2026). At your age, tax-free growth for 30+ years is mathematically extraordinary.
- Build to a 20%+ total savings rate across 401(k), IRA, and brokerage.
- Don't pre-invest your future raises. Each raise is an opportunity to bank 50%+ of the increase before lifestyle creep claims it.
- Avoid actively managed funds and high fees. A 1% fee compounds to roughly 28% of your portfolio gone over 30 years.
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Frequently Asked Questions
What's a typical CoastFIRE number at age 25?
It depends entirely on your retirement spending. For a $75,000-income lifestyle (~$45,000/yr in retirement), CoastFIRE at 25 is approximately $159,801. For a $150,000 income (~$90,000/yr in retirement), it's around $319,603. The full table above shows other income levels.
Is 25 too late to start saving?
No — at 25 you still have 40 years of compounding ahead. Every dollar you invest now will roughly 7.0× by retirement (real, after inflation).
How does 25 compare to starting at 25?
Someone who hit CoastFIRE at 25 with a $300k portfolio would have roughly $300k by age 25 without adding a dollar — that's the cost of waiting. The good news: starting at 25 just means a higher savings rate and tighter spending control, not failure.
What return assumption is realistic?
This page uses
5% real return (7% nominal minus 3% inflation). That matches the long-run S&P 500 average and is what most fee-only financial planners use. Some FIRE writers prefer 4% real (more conservative); a few use 7% real (more aggressive). Real-world Monte Carlo testing is in the
calculator.