FAT FIRE+ · Spain
Can You Retire on $10M in San Sebastian?
The honest math. Standard FIRE assumptions, cost-of-living data from our San Sebastian guide, and the caveats most retirement calculators skip.
The Answer
Yes, comfortably
At the standard 4% safe withdrawal rate, you'd generate meaningfully more than local cost of living, with buffer for lifestyle upgrades, healthcare, and inflation.
At 4% rule, you have
$33,333/mo
Local cost of living
$2,170/mo
Monthly buffer
+$31,163
What $10M Actually Generates
| Withdrawal Strategy | Monthly Income | vs Cost of Living | Horizon |
|---|---|---|---|
Conservative (3.25%) Wade Pfau's horizon-adjusted rate for 50-year early retirement | $27,083 | +$24,913 | 50+ years |
Moderate (3.5%) Pfau-Kitces research for 40-year FIRE retirement | $29,167 | +$26,997 | 40 years |
Standard 4% Rule (Bengen) Classic Bengen/Trinity 30-year safe rate | $33,333 | +$31,163 | 30 years |
Aggressive (5%) Trinity Study showed ~83% success over 30 years; more reliable for shorter horizons | $41,667 | +$39,497 | ~20 years |
Based on William Bengen's 4% rule (1994) and horizon-adjusted extensions by Wade Pfau and Michael Kitces. See Safe Withdrawal Rate by Age for details on choosing your rate.
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Where the $2,170/month Goes in San Sebastian
- Rent (1BR, city center)
- $1,500
- Groceries & food
- $350
- Utilities
- $120
- Transportation
- $50
- Healthcare
- $150
Numbers are for a comfortable solo lifestyle. Couples typically run 1.5× these costs; families with kids 2–2.5×. For full lifestyle data, see the San Sebastian city guide.
The Full FIRE Number for San Sebastian
If you want to retire in San Sebastian using the standard 4% rule with a clean 30-year buffer, your FIRE number is:
You have $10,000,000. That's $9,349,000 above target.
What Taxes Would You Pay in Spain?
Spain taxes worldwide income.
Special programs for new residents
- 24% flat tax on Spanish income for 6 years (6 years)
What This Analysis Doesn't Include
Your actual tax drag
We assume baseline SWR. Your real post-tax income depends on account mix (Roth/traditional/taxable), Social Security, and where funds are held.
Healthcare pre-Medicare
The healthcare line uses local averages. US expats pre-65 often face much higher costs; EU and Thai retirees often much lower.
Sequence of returns risk
A 4% rule works historically — but not if your first decade has bad returns. See our sequence risk guide.
Currency & visa
FX swings and visa renewal requirements change the math for non-nationals. Research the specific visa pathway to Spain before committing.
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These are generic assumptions. Your plan depends on your actual portfolio, expected returns, tax situation, Social Security, healthcare needs, and timeline. Create a free account to save your plan, track progress over time, and get AI coaching tailored to you.
Other Amounts in San Sebastian
With $10M, You Could Also Afford
$10M comfortably supports retirement in San Sebastian. It also works in these similar-or-somewhat-pricier cities.
Go Deeper
Cost-of-living data sourced from Numbeo, government sources, and research; tax data from state/country sources with per-page provenance. Educational content only — consult a fiduciary advisor before acting on any retirement plan.