Your savings rate is the biggest factor you control in how many years you’ll work. Starting from zero, with a 5% real return and a 4% withdrawal rate, saving 10% of your take-home pay means about 51 years of work, 30% means about 28 years, and 50% means about 17. Saving more shortens the timeline twice: you invest more each year, and you’re living on less, so the target you need is smaller.
Below is the full table, the math behind it, and the assumptions that move it most.
How many years to retirement at each savings rate #
These figures assume you start with nothing, save a fixed share of your take-home pay every year, earn a steady real (after-inflation) return, and retire when your savings reach 25 times what you spend. That’s the 4% rule. We show two return assumptions, because nobody knows which one you’ll get.
| Savings rate | Years to FI at 5% real return | Years to FI at 4% real return |
|---|---|---|
| 5% | 66 | 76 |
| 10% | 51 | 59 |
| 15% | 43 | 48 |
| 20% | 37 | 41 |
| 25% | 32 | 35 |
| 30% | 28 | 31 |
| 40% | 22 | 23 |
| 50% | 17 | 18 |
| 60% | 12.5 | 13 |
| 70% | 9 | 9 |
| 80% | 5.5 | 5.5 |
This kind of table was popularized by the Mr. Money Mustache blog in 2012, and the math still holds. Notice that the return assumption matters a lot at low savings rates and hardly at all at high ones. At 70%, you’re done in about nine years either way, because most of the money is your own contributions rather than growth. At 10%, a one-point difference in return moves your date by eight years.
Why saving more works twice #
Every dollar you save does two jobs.
It builds the pile. More goes into investments each year.
It shrinks the target. Your FIRE number is based on spending, not income. If you save more, you spend less, and the amount you need to retire falls.
Take two people who each bring home $100,000 after tax:
| Saver A | Saver B | |
|---|---|---|
| Savings rate | 20% | 50% |
| Saved per year | $20,000 | $50,000 |
| Spent per year | $80,000 | $50,000 |
| FIRE number (spending × 25) | $2,000,000 | $1,250,000 |
| Years to FI (5% real) | about 37 | about 17 |
Saver B isn’t just saving 2.5 times as much. They’re also aiming at a target $750,000 smaller. That’s why the years fall so steeply as the rate rises.
Why a 10% savings rate takes so long #
At 10%, each year of work covers only about a month and a half of retirement spending (10% saved against 90% spent). You need decades of compounding to close the gap. At 50%, each year of work funds a full year of retirement before any growth. Growth then does the rest.
Returns help most over long horizons. A saver at 15% gets a lot from compounding over 40 years. A saver at 60% is out before compounding has time to do much. That’s why saving more is the most dependable lever early on, and returns are the main one for people who start late.
How to calculate your own savings rate #
Use the version that matches the table:
Savings rate = amount saved ÷ take-home pay
- Take-home pay is after taxes. If you contribute to a 401(k) before tax, add those contributions back to take-home pay and count them in the amount saved.
- Amount saved includes 401(k) and IRA contributions, HSA contributions, brokerage deposits, and extra principal paid on a mortgage if you choose to count it.
Whether to include an employer match, and whether to use gross or net income, are judgment calls. What matters is consistency. See gross vs. net savings rate and factoring in your 401(k) match. If you’re self-employed, the freelancer savings rate guide handles uneven income and self-employment tax.
What the table leaves out #
The table is a simplification, and a few things shift it for real people:
- Starting savings. If you already have money invested, you’re further along than the “from zero” figures suggest.
- Social Security and pensions. Income that starts later reduces how much your portfolio must cover, especially for traditional retirement ages.
- Withdrawal rate. For 40- to 50-year retirements, many planners prefer 3.25% to 3.5%, which means 28 to 31 times spending. That adds a few years to every row.
- Uneven returns. Real markets don’t give 5% every year. A crash just before your target date can push it back; a boom can pull it forward.
- Spending changes. Kids, healthcare and housing rarely hold still for 30 years.
How to raise your savings rate without misery #
- Target the big three: housing, transport and food. For most households, these are where large, permanent savings live. A cheaper home or one less car payment can move your rate by 10 points; skipping coffee won’t.
- Save raises. Send at least half of every raise or bonus straight to savings before your spending catches up.
- Automate on payday. Treat savings like a bill that’s paid first.
- Collect the full 401(k) match. It’s the highest guaranteed return most people ever get.
Coast FIRE and Barista FIRE: using a high rate early #
You don’t have to keep a 50% rate forever. Saving hard in your 20s and 30s can get you to Coast FIRE, the point where your existing savings grow to a traditional retirement target with no more contributions. After that, you only need to cover today’s costs, which frees you to take an easier job or work part-time. Barista FIRE works the same way, with part-time income covering part of your spending while the portfolio covers the rest.
Turn your rate into a date #
The table is a starting point. A projection built on your own numbers is better. In Retire Goals, you set a FIRE goal with your target and expected return, then log what you actually save. Every contribution moves the projected finish date, and a Monte Carlo outlook estimates the odds of getting there, not just a single line at a fixed return. A weekly streak on the dashboard shows whether your savings habit is holding up, which, as the table shows, is what decides your date.
Frequently asked questions #
Does income or savings rate matter more for early retirement? #
Savings rate. A household earning $50,000 that saves 50% spends $25,000 a year and needs about $625,000 to retire. A household earning $250,000 that saves 10% ($25,000) spends $225,000 and needs about $5.6 million. Higher income helps only if it raises the savings rate.
What savings rate do I need to retire early? #
To retire 15 to 20 years after starting from zero, the table points to roughly 45% to 55% of take-home pay. For a retirement in your 50s after starting in your 20s, 25% to 35% is often enough. Existing savings, Social Security and your withdrawal rate all shift these numbers.
What return does the savings rate table assume? #
A constant real return (after inflation) of 5%, with a 4% column for comparison. Real returns vary year to year; U.S. stocks averaged about 6.8% a year after inflation from 1928 through 2025, and a portfolio with bonds would expect less. Using a lower number builds in some margin.
Do taxes change the calculation? #
The table uses take-home pay, so income taxes are already out. Pre-tax accounts like a 401(k), IRA or HSA can raise your effective savings rate, because money that would have gone to tax goes to savings instead. You’ll pay tax on traditional-account withdrawals later, often at a lower rate.