The Magic Number: Your Savings Rate
Savings Rate = (Amount You Save) / (Gross Income) × 100
If you earn $60,000 and save $9,000/year, your savings rate is 15%.
Count employer matches as part of both savings AND income for the true rate.
How Your Savings Rate Determines Your Retirement Age
Assuming you start with $0, earn 5% real returns, and want to replace 80% of pre-retirement income:
| Savings Rate | Years to Retirement | Retire At (Starting at 25) |
|---|---|---|
| 10% | 51 years | 76 |
| 15% (50/30/20 goal) | 43 years | 68 |
| 20% | 37 years | 62 |
| 30% | 28 years | 53 |
| 40% | 22 years | 47 |
| 50% (Lean FIRE) | 17 years | 42 |
| 60% | 12 years | 37 |
Every 5 percentage points you increase your savings rate shaves roughly 5-7 years off your working life. Going from 15% to 25% doesn't just save more — it buys you a decade of freedom.
The 50/30/20 Rule: The Baseline
| Category | % of Income | $60,000 Example |
|---|---|---|
| Needs (rent, food, transport, insurance) | 50% | $2,500/month |
| Wants (dining, travel, entertainment) | 30% | $1,500/month |
| Savings & Debt Paydown | 20% | $1,000/month |
The 50/30/20 rule is the minimum viable baseline — not the goal. At 20%, you'll retire around 62. Comfortable, but not early. The real magic happens above 30%.
Income-Based Targets
| Annual Income | 20% Rate | 30% Rate | 50% Rate |
|---|---|---|---|
| $40,000 | $667/month | $1,000/month | $1,667/month |
| $75,000 | $1,250/month | $1,875/month | $3,125/month |
| $120,000 | $2,000/month | $3,000/month | $5,000/month |
| $200,000 | $3,333/month | $5,000/month | $8,333/month |
Where to Cut First
Housing, transportation, and food eat 60%+ of most budgets. A $300/month car payment invested at 8% for 30 years becomes $447,000. A $200/month restaurant habit invested instead becomes $298,000. Every dollar you redirect from consumption to investment earns compound returns on itself — indefinitely.
Key Takeaways
- Savings rate determines retirement age — 15% = 68, 30% = 53, 50% = 42
- 50/30/20 is the baseline. Aim for 25-30% if retiring early is a goal
- Each +5% in savings rate = ~5-7 fewer working years
- A $300/month expense cut, invested, becomes $447K in 30 years