FIRE · Core

Savings Rate Calculator

Your savings rate — the percentage of take-home pay you save — is the single most powerful variable in FIRE planning. More than your salary, your investment choices, or your city. See yours and how it maps to a retirement timeline.

Your savings rate
38%
Monthly saved
$2,500
Years to FIRE
18.8 yrs
7% return, 4% withdrawal
How savings rate shifts your FIRE date
10%
38.0 yrs
20%
28.5 yrs
30%
22.4 yrs
40%
17.8 yrs
50%
13.9 yrs
60%
10.6 yrs
70%
7.6 yrs

Why savings rate matters more than income

At a 10% savings rate, you need to work 43 years to retire. At 50%, you need just 17 years. At 75%, just 7 years. The relationship is non-linear — small increases in savings rate compress your timeline dramatically, especially as you approach 50%.

This is based on the "shockingly simple math" behind FIRE from Mr. Money Mustache: your years to retirement is determined entirely by your savings rate and expected investment returns. Your income level cancels out — a doctor saving 10% has the same FIRE timeline as a teacher saving 10%.

The 4% rule (safe withdrawal rate) is used here to calculate your FIRE target: 25× your annual expenses. Investment returns are modeled at 7% annually (inflation-adjusted S&P 500 historical average).

Savings Rate Calculator: The #1 Lever in FIRE

Your savings rate — the share of take-home pay you invest each month — does more to set your retirement date than your income. Save 10% and financial independence is decades away; save 50% and it can arrive in under 20 years. Use the calculator above to find your rate, then see how raising it pulls your freedom date closer.

Turn your savings rate into a full timeline with the FIRE calculator, or size your end goal with the FIRE number calculator. To go deeper, read why savings rate matters more than income.

Savings rate FAQ

What is a savings rate?

Your savings rate is the percentage of your take-home income that you save or invest each month. It is calculated as monthly savings divided by monthly take-home income. A higher savings rate means you can retire earlier because you accumulate wealth faster and also prove you can live on less.

What savings rate do I need to retire early?

The higher your savings rate, the faster you reach financial independence. Saving 10% takes roughly 40 years. Saving 25% takes about 32 years. Saving 50% takes around 17 years. Saving 65%+ can get you to FIRE in under 10 years. The exact timeline also depends on your starting portfolio and investment returns.

Does savings rate or income matter more for FIRE?

Savings rate matters more than income for FIRE timelines. Someone earning $60,000 and saving 50% will reach financial independence far sooner than someone earning $150,000 and saving 10%. Income helps, but the percentage you keep — not the dollar amount you earn — is the primary driver of your FIRE date.

How do I calculate my savings rate?

Savings rate = (monthly savings ÷ monthly take-home income) × 100. Monthly savings includes retirement contributions (401k, IRA), taxable investing, and any other money you put aside. Take-home income is after tax. If you save $1,500 per month and take home $5,000, your savings rate is 30%.