The Savings Rate Formula
Savings Rate = (Amount Saved ÷ Gross Income) × 100
Example: $5,000/month income
Save $500/month
Save $1,000/month
Save $1,500/month
Save $2,500/month
Savings Rate → Years to Retirement
| Savings Rate | Years to Retirement | Retire at (starting at 25) |
|---|---|---|
| 5% | 66 years | Age 91 |
| 10% | 43 years | Age 68 |
| 20% | 37 years | Age 62 |
| 30% | 28 years | Age 53 |
| 40% | 22 years | Age 47 |
| 50% | 17 years | Age 42 |
| 70% | 8.5 years | Age 33 |
Assumes 5% real investment return, 4% safe withdrawal rate. Source: Mr. Money Mustache methodology.
Frequently Asked Questions
What is a good savings rate?
Financial experts recommend saving at least 20% of your income (the 50/30/20 rule). FIRE (Financial Independence) followers often target 50–70%. Even 10% is a strong start if you're just beginning.
How do I calculate my savings rate?
Savings Rate = (Amount Saved ÷ Gross Income) × 100. If you earn $5,000/month and save $1,000, your savings rate is 20%. Some use net income instead of gross — both are valid, just be consistent.
Does my 401(k) contribution count toward my savings rate?
Yes. Pre-tax 401(k) contributions, Roth IRA contributions, and employer matches all count toward your savings rate. Including employer match gives you a more complete picture of your total savings.
How does savings rate affect retirement age?
A 10% savings rate means ~43 years to retirement. 20% = ~37 years. 30% = ~28 years. 50% = ~17 years. 70% = ~8.5 years. Higher savings rates dramatically compress the time to financial independence.
What is the 50/30/20 rule?
50% of after-tax income goes to needs (rent, food, utilities), 30% to wants (entertainment, dining out), and 20% to savings and debt repayment. It's a simple framework for balanced budgeting.