Can I FIRE Yet? Calculator

1. 1.Net spending against passive income

   Subtract other passive income and the share of rental cash flow you keep from your target spending. What's left is the spending your portfolio has to fund.

   funded_spend = max(0, spending - passive_income - rental_cash_flow x retained_share)

2. 2.Turn it into a required portfolio

   Divide funded spending by your withdrawal rate, then add a cash reserve of N years of spending on top. The reserve is why the target runs above a bare 25x.

   required = funded_spend / withdrawal_rate + funded_spend x reserve_years

3. 3.Count only FIRE-ready assets

   Invested portfolio and cash count in full. Real estate counts only the share you would redeploy, minus selling costs (10% by default). What's left to save is the required portfolio minus counted assets.

   counted = invested + cash + real_estate_equity x redeploy_share x (1 - haircut)
   left_to_save = required - counted

4. 4.Run the bridge and date the milestones

   If invested assets can't carry spending yet, cash pays the bills while spending inflates and the portfolio compounds. The projection reruns at 7%, 5%, 4% and 3.5% withdrawal rates to find the first year assets clear each target.

   nominal_return = (1 + real_return) x (1 + inflation) - 1
   spend_t = spend_0 x (1 + inflation) ^ t

1. With no passive income, your portfolio funds all $90,000. At 4% that is $2,250,000, plus a two-year reserve of $180,000, for a required portfolio of $2,430,000.
2. Counted assets are $1,800,000 invested plus $350,000 cash, or $2,150,000. You have $280,000 left to save, and you're 88.5% funded.
3. Cash funds year one. By the handoff year spending has inflated to $92,700, which needs $2,502,900 of assets. The projection reaches $2,211,900, so the plan status is Growth Deficit.
4. The same assets clear the 5% target today, reach the 4% target in 4 years (age 42) and the 3.5% target in 7 years (age 45).

The same balance sheet is FIRE-ready at 5%, four years away at 4% and seven years away at 3.5%. A $350,000 cash pile buys one bridge year once you hold a two-year reserve.

• One steady return and one inflation rate. There is no volatility or sequence-of-returns risk, so a retirement that starts in a drawdown will look worse than this.
• Taxes aren't modeled. Put your expected tax bill inside annual spending, and remember a traditional 401(k) dollar is worth less than a brokerage dollar.
• Real-estate selling costs are a flat percentage. Capital-gains tax, depreciation recapture and a slow sale are not modeled.
• Withdrawal rates are fixed percentages, with no guardrail strategies. Medicare and ACA subsidies aren't modeled. Social Security can go in other passive income, but it counts from today.
• Spending is flat in real terms, with no lumpy costs or care shock. The projection stops at 100 years. These are estimates, not financial advice.

Plan status

Sustainable Now: invested assets cover spending. Sustainable Bridge: cash covers it until handoff. Growth Deficit: portfolio too small at handoff. Reserve Deficit: cash below the floor. Not Viable: never sustainable.

Bridge and handoff

The years cash can fund spending above the reserve floor, then the handoff year the portfolio takes over, with the spending and assets required then.

Years to FI

The year your total portfolio crosses the FI target at your selected rate, valued in future and today's dollars. Starting assets, new savings and growth are split out.

Progress checkpoints

Required portfolio, funded percentage, left to save and projected age at 7%, 5%, 4% and 3.5%. The 7% row is a progress marker, not a recommendation.

Required and counted assets

Required: funded spend over your withdrawal rate, plus the cash reserve. Counted, shown as starting assets: invested, cash and haircut-adjusted redeployed equity. Equity you keep as-is is excluded.

Asset treatment scenarios

How the required portfolio and what is left to save change if you keep, half-redeploy or fully redeploy real estate. Redeploying trades rental income for liquid assets.