FI Number Math: How to Calculate What You Actually Need
25x annual expenses is the headline rule. For anyone retiring before 55, the real number is 30-33x. The difference is healthcare and sequence risk.
An educational resource for people who want to invest wisely—without unnecessary complexity or “secret strategies.” The site breaks down the mechanics of investing: index funds, dividend-paying stocks, tax optimization, retirement accounts, and real estate as an investment vehicle.
25x annual expenses is the headline rule. For anyone retiring before 55, the real number is 30-33x. The difference is healthcare and sequence risk.
Hit $500,000 at 45 and you can stop contributing entirely. At 7% real return, that becomes $1.5 million at 65. The target number depends on your actual retirement spending.
Bill Bengen's original 1994 study used historical data through 1992. After three down years, does $40,000 on $1 million still work? The data says yes, with one adjustment.
Roofstock sells properties with tenants, managers, and 30-day guarantees. The returns average 6-8%. The hidden costs usually eat 2% of that.
The 1% rule failed when rates doubled. Today's deals need cap rates above the mortgage rate plus 2%. Here's how that math plays out in real markets.
Buy a duplex with 3.5% down via FHA. Live in one unit. Rent the other. The tenant covers most of your mortgage while you build equity on $400,000 of property.
Private non-traded REITs charge 12% in upfront loads and ongoing fees. Public REITs cost 0.12%. The returns are worse, the liquidity is worse, the math is obvious.
VNQ holds 160 REITs, yields 4%, and you never fix a toilet. The performance tradeoff vs. direct ownership isn't what most people think it is.
Tax-deductible going in. Tax-free growth. Tax-free withdrawals for medical. No other account does all three. The 2026 family limit is $8,550.
A 3% muni yield is a 4.76% taxable equivalent at the 37% bracket. For anyone above the 24% bracket, munis usually win in taxable accounts.
Under $94,050 in taxable income for a couple in 2026: your capital gains rate is 0%. Early retirees harvest gains tax-free every year for a decade.
Sell at 364 days: taxed at 37%. Sell at 366 days: taxed at 20%. That's $17,000 on a $100,000 gain — for two days of patience.