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Free · % of take-home · Years to FIRE

Savings rate calculator

Savings rate = the % of take-home pay you save and invest. It's the single biggest lever on how soon you reach financial independence — bigger than income, bigger than return assumptions. See your rate and what it buys you in years-to-FIRE.

Why savings rate (not income) drives years-to-FIRE · MMM 2012 · Bengen 1994 SWR · Trinity Study 1998
15% saver: ~43 yrs · 25%: ~32 · 50%: ~17 · 65%: ~10.5 · 75%: ~7
From Mr. Money Mustache's 'Shockingly Simple Math Behind Early Retirement' (2012): assuming 5% real return and 4% safe withdrawal, your savings rate alone determines years-to-FI. Doubling income doesn't help if you double spending. Cutting spending counts twice (less to save FOR, more saved each month).
Most calculators ask for monthly $ saved. Savings rate as % is what FIRE practitioners actually compare — and what compresses years.

Years to FIRE by savings rate (MMM table)

Savings rateYears to FI (from $0)Retire by age (start at 25)
5%~66never (90+)
10%~5176
15%~4368 (standard)
25%~3257
35%~2550
50%~1742
65%~10.536
75%~732

Assumes 5% real return and 4% safe withdrawal rate. Income level does not appear in the formula — only savings rate.

How to calculate your savings rate

Formula: savings rate = annual savings ÷ annual take-home pay × 100. Use take-home (after-tax) pay, not gross. Include 401(k) match if employer-provided. Include debt principal paydown (it builds net worth). Don't include mortgage principal if you treat the home as consumption, do include if you treat it as investment.

Average vs FIRE savings rates

  • US personal savings rate (BEA, 2025): ~4–5% — below pre-pandemic baseline
  • Standard financial planning rec: 15–20%
  • FIRE community baseline: 50%+ to retire in ~17 yrs
  • Mustachian (MMM) target: 65–75% — retire in 7–10 yrs
  • Ramit Sethi school: 10–20% guilt-free, focus on income growth

Raising your savings rate

Two levers, applied at the same time, compound faster than either alone. (1) Cut the three big rocks — housing, transport, food — not the small daily latte. Each $1k/month in fixed costs cut = ~$300k less needed at FI. (2) Grow take-home — career capital, side income, geographic arbitrage. Each additional $1k/month earned, if saved entirely, takes 5+ years off FI date for most households.

Savings Rate Calculator FAQ

What is a good savings rate?

Standard financial advice: 15–20% of gross income. To retire at standard age (65+), 15% works. To retire by 50: 35–40%. To retire by 40: 50%+. To retire by 35: 65%+. The FIRE community treats 50% as a normal baseline; mainstream personal finance treats 20% as ambitious.

Does savings rate include 401(k) match?

Yes — it's saved money entering your portfolio. If your employer matches 5% and you save 10% yourself, your effective savings rate against gross income is 15%. Against take-home pay it's higher (since the match never appears in take-home).

How do I calculate savings rate with debt payoff?

Principal paydown counts as savings — it builds net worth dollar-for-dollar. Interest does NOT count — it's expense. So a $1,000 student loan payment with $200 interest + $800 principal contributes $800 to your savings rate. Most calculators ignore this; we treat it explicitly.

What's the highest realistic savings rate?

Mustachian households routinely hit 65–75% on dual income with frugal lifestyles. 80% is rare but documented (Pete Adeney himself, Mad Fientist). Above 80% requires either very high income with extreme frugality, or geographic arbitrage (low-cost-of-living countries while earning high-income remote salary).

How does income affect years-to-FIRE?

Counterintuitively, very little — at a given savings rate. The math works because spending IS the FI target (25× expenses). A $50k earner saving 50% and a $500k earner saving 50% both reach FI in ~17 years, just at very different absolute portfolio sizes ($625k vs $6.25M). Higher income makes saving 50% easier but doesn't change the timeline if rate is held constant.

Is the savings rate formula reliable?

It's an approximation. Real-world variability: market returns (4% real not guaranteed), tax efficiency (Roth vs Traditional treatment of withdrawals), longevity, healthcare costs, sequence-of-returns risk. For a 30-year retirement at 4% SWR, historical backtests show ~95% success. Treat the table as a planning anchor, not a guarantee.

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