The answer to "how much should I save?" depends entirely on when you want financial freedom. The math is deterministic: your savings rate, more than your income level, determines your financial timeline.
The research-based savings rates
| Savings rate | Years to financial independence (7% returns) |
|---|---|
| 5% | 66 years |
| 10% | 43 years |
| 15% | 37 years |
| 20% | 37 years* |
| 25% | 32 years |
| 30% | 28 years |
| 40% | 22 years |
| 50% | 17 years |
| 65% | 10 years |
*Starting from zero. Data from Mr. Money Mustache's foundational analysis of the 4% rule.
What "savings" includes (often miscounted)
- 401(k) contributions (including employer match)
- IRA contributions
- HSA contributions
- Mortgage principal payments (not interest — that's housing cost)
- Taxable brokerage contributions
- Emergency fund contributions
The minimum viable savings rate by goal
- Survive an emergency: Positive savings rate, any amount. Even 1% is better than 0%.
- Standard retirement at 65: 15% recommended by most financial institutions.
- Retire by 60: 25–30% minimum.
- FIRE by 50: 40–50%.
If you can't hit 15% yet
Start with 1%. Increase by 1% with each raise. Use automation so the decision is made once. Research shows that people who automate savings at even small percentages have dramatically higher savings rates over 10 years than people who save "what's left" after spending.
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