Your savings rate — the percentage of your take-home pay you save and invest — is a far better predictor of when you can retire than your income is. Assuming a 5% real (after-inflation) investment return and a 4% safe withdrawal rate, a 25% savings rate gets you to financial independence in roughly 32 years; a 50% savings rate gets you there in about 17.
This is a well-known bit of FI-community math (popularized by Mr. Money Mustache and others), and it holds up because of a simple mechanic: a higher savings rate does two things at once — it grows your investments faster and it shrinks the annual expenses your portfolio eventually needs to cover. Income alone only does the first.
Savings rate vs. years to financial independence
| Savings rate | Approx. years to FI |
|---|---|
| 5% | 66 years |
| 10% | 52 years |
| 15% | 43 years |
| 20% | 37 years |
| 25% | 32 years |
| 30% | 28 years |
| 40% | 22 years |
| 50% | 17 years |
| 60% | 13 years |
| 70% | 9 years |
This table is a simplified model (starting from $0 invested), not a personal projection — a raise, a market downturn, or starting with existing savings all shift your real timeline. Use the calculator below for your actual numbers.
Why savings rate beats income
Two people earning very different incomes can hit financial independence at the same time if they save the same percentage — because "enough to retire on" scales with spending, not income. Someone earning $60,000 and spending $30,000 (50% savings rate) reaches their number in the same ~17 years as someone earning $200,000 and spending $100,000. A raise that gets entirely absorbed into higher spending doesn't move the timeline at all.
How to actually move your number
- Cut a recurring expense, not a one-time one. A permanently lower monthly bill compounds every year after; a one-time splurge skipped only helps once.
- Save raises before you get used to them. Increasing your savings rate alongside a raise, rather than letting lifestyle spending absorb it, is the single highest-leverage move on this list.
- Don't ignore the earn side. The table only moves as fast as your rate — see our guides on asking for a raise and side income for the other half of the equation.
Get your actual number
This table uses generic assumptions. Plug in your real numbers — current savings, monthly contribution, and expected return — to see your own timeline.
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It's a moderate, commonly used planning assumption for a diversified stock-heavy portfolio after inflation — some planners use a more conservative 4%, others use a more optimistic 6-7% based on long-run historical stock market averages. The table above will shift somewhat with a different assumption, but the core relationship (savings rate matters more than income) holds regardless.
No — this is a simplified model based purely on personal investment savings, which is the standard, conservative way FI calculations are usually framed. Social Security or a pension would reduce how much you personally need to have saved, but relying on that reduces flexibility if those benefits change.
The table starts from $0, so if you already have savings invested, your real timeline is faster than the table shows. Use the FI calculator linked above to enter your actual current savings for a personalized estimate.