Coast FIRE comparison tables
Reproducible examples showing how one changed input affects a modeled Coast FIRE number. These are formula outputs, not averages of real households, market forecasts or recommended targets.
Published by Coast FIRE Calculator · Reviewed September 7, 2026
Use these tables for sensitivity, not validation
Each row is calculated from the printed assumptions. Compare rows to see direction and scale, then enter your own spending, timing and return ranges. “Coast FIRE number” means the modeled amount needed today; it is not evidence that a plan will succeed.
Coast FIRE Number by Age
How your Coast FIRE number changes based on your current age, assuming you retire at 65.
| Current Age | Coast FIRE # |
|---|---|
| Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR | $226,177 |
| Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR | $272,360 |
| Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR | $327,972 |
| Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR | $394,940 |
| Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR | $475,581 |
| Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR | $572,688 |
| Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR | $689,624 |
| Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR | $830,436 |
Assumptions: Retirement age 65 · $40k annual spending · 7% return · 3% inflation · 0.1% fees · 4% SWR
Coast FIRE by Annual Retirement Spending
How your desired retirement spending level changes your Coast FIRE number.
| Annual Spending | Coast FIRE # |
|---|---|
| $30k annual spending | $204,270 |
| $40k annual spending | $272,360 |
| $50k annual spending | $340,450 |
| $60k annual spending | $408,540 |
| $80k annual spending | $544,719 |
| $100k annual spending | $680,899 |
Assumptions: Age 30 · Retirement age 65 · 7% return · 3% inflation · 0.1% fees · 4% SWR
Return Rate Sensitivity
How different expected return rates change your Coast FIRE number.
| Nominal Return | Coast FIRE # |
|---|---|
| 5% nominal return | $527,425 |
| 6% nominal return | $378,394 |
| 7% nominal return | $272,322 |
| 8% nominal return | $196,586 |
| 9% nominal return | $142,340 |
| 10% nominal return | $103,367 |
Assumptions: Age 30 · Retirement age 65 · $40k spending · 3% inflation · 0.1% fees · 4% SWR
Inflation Sensitivity
How different inflation assumptions change your Coast FIRE number.
| Inflation Rate | Coast FIRE # |
|---|---|
| 2.0% inflation | $193,547 |
| 2.5% inflation | $229,676 |
| 3.0% inflation | $272,322 |
| 3.5% inflation | $322,621 |
| 4.0% inflation | $381,898 |
| 5.0% inflation | $533,833 |
Assumptions: Age 30 · Retirement age 65 · $40k spending · 7% return · 0.1% fees · 4% SWR
Investment Fee Impact
How different investment fee levels change your required Coast FIRE number.
| Annual Fees | Coast FIRE # |
|---|---|
| 0.0% annual fees | $263,555 |
| 0.1% annual fees | $272,322 |
| 0.5% annual fees | $310,504 |
| 1.0% annual fees | $366,098 |
| 1.5% annual fees | $431,983 |
| 2.0% annual fees | $510,126 |
Assumptions: Age 30 · Retirement age 65 · $40k spending · 7% return · 3% inflation · 4% SWR
Get Your Personalized Number
These examples use fixed assumptions. Build a personal estimate, then test conservative and optimistic inputs rather than relying on one result.