What FI corpus is needed for ₹70K monthly expenses using 3.5% safe withdrawal rate?
Scenario
Anjali, age 35, mid-career marketing manager in Mumbai, ₹18 lakh annual income, married with one child, ₹70K monthly household expenses
Inputs
- Inflation %
- 6
- Retirement years
- 30
- Annual expenses INR
- 8,40,000
- Safe withdrawal rate %
- 3.5
Calculation
- 1.
Annual expense (₹/year)
Monthly expense × 12 → ₹8.40 L
- 2.
FI corpus (₹/year ÷ SWR)
₹8,40,000 ÷ 0.035 → ₹2.40 Cr
- 3.
Multiplier (corpus ÷ annual expense)
1 ÷ 0.035 → 28.6x
- 4.
Real (today-rupees) corpus needed at retirement age (assuming 30-year retirement)
Same — SWR formula uses today's rupees → ₹2.40 Cr
Conclusion
₹70K/month requires ₹2.40Cr corpus at 3.5% SWR — the 29× rule that drives Indian FIRE planning.
Tradeoffs
3.5% SWR has ~90% historical survival probability for 30-year retirement. Lower SWR (3%) is safer but requires bigger corpus; higher (5%) risks depletion. Sequence-of-returns risk in years 1-5 dominates outcome more than long-term average return.