Coast FIRE Calculator with Social Security: Should You Include It?
Quick Answer
You can include Social Security in Coast FIRE planning by subtracting expected Social Security income from your annual retirement spending before calculating your FIRE number. Many people also run a second scenario without Social Security for a more conservative estimate.
Social Security can reduce the portfolio income you need in retirement. If you expect to spend $70,000 per year and estimate $20,000 per year from Social Security, your portfolio may only need to cover $50,000 before taxes and other adjustments.
Run Two Scenarios
| Scenario | Why it helps |
|---|---|
| Without Social Security | Shows a conservative Coast FIRE number. |
| With Social Security | Shows how expected benefits may reduce required portfolio income. |
Use cautious benefit assumptions, especially if retirement is decades away. Benefit rules, claiming age, taxes, and personal work history can change the result.
Use the free Coast FIRE calculator
FAQ
Should young investors include Social Security?
Many younger investors exclude it first, then run a second estimate with a reduced benefit to understand the range.
Where do I enter Social Security?
Subtract expected annual benefit income from annual retirement spending, then enter the reduced spending amount in the calculator.
Educational content only. Not financial advice.