Savings Rate Calculator
The percentage of your pay you keep decides how long you work. Find your savings rate, and the number of years it implies.
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Savings rate is annual savings divided by annual take-home pay. The timeline grows your current invested net worth plus your annual savings at your expected real return until it reaches your spending divided by your withdrawal rate. Markets, taxes and the order in which returns arrive are not modelled.
Your savings rate is the single number that decides how long you have to work. Not your salary, not the fund you picked — the percentage of your take-home pay you do not spend. It matters twice over: a higher rate fills the portfolio faster and shrinks the target the portfolio has to reach, because the target is a multiple of your spending.
The maths behind the number
Your financial-independence number is annual spending divided by your withdrawal rate. At 4%, that is 25 times what you spend in a year. The timeline is then the number of years it takes your current invested net worth, growing at your expected real return and topped up by your annual savings, to reach that target. Written out:
years = ln((target × r + savings) ÷ (net worth × r + savings)) ÷ ln(1 + r)
Use a real return — your expected return minus inflation — so the target and the projection both stay in today's money. Five percent real is a common planning assumption for a diversified equity-heavy portfolio; it is an assumption, not a promise.
Years to independence by savings rate
Starting from zero, at a 5% real return and a 4% withdrawal rate, the relationship between savings rate and working years looks like this. It is the table that converted most people who have ever taken FIRE seriously.
Notice the shape. The curve is steep at the left and flat at the right: going from 10% to 20% saves about seventeen years, while going from 70% to 80% saves about three. Early increases in savings rate are worth far more than late ones, which is an argument for fixing your spending before optimising your portfolio.
Why the starting balance matters less than you think
If you are starting near zero, returns barely move the timeline for the first decade — there is almost nothing to compound. What moves it is the size of the annual contribution relative to the target. Once the portfolio is large, the reverse becomes true and returns dominate. That is why raising your savings rate is the highest-leverage move early on, and why staying invested becomes the highest-leverage move later.
Cutting spending versus earning more
A dollar cut from spending is worth more than a dollar added to income, because it does two jobs at once. Cutting $1,000 of annual spending adds $1,000 to annual savings and removes $25,000 from the FI target at a 4% withdrawal rate. Earning $1,000 more, after tax, only does the first. Raising income still helps enormously — but only if the extra money is not immediately spent.
Take-home pay, not gross
Measure your savings rate against take-home pay. Gross-income savings rates look flattering and are hard to compare across countries and tax regimes. If you want to include employer pension contributions, add them to both the numerator and the denominator so the ratio stays honest. Not sure what your take-home actually is? Work it out with the paycheck calculator, or the India salary calculator if you are paid a CTC.
Questions, answered
What is a good savings rate?
Anything above 20% of take-home pay puts you well ahead of the average household, and a rate in the 40–60% range is what most people who reach financial independence early are running. The right number is the highest one you can hold for years without resenting it.
Should I count employer pension contributions?
You can, as long as you add them to income as well as to savings. Counting them only as savings inflates the rate. Counting them in both places is consistent and still shows the real effect on your timeline.
Does paying down debt count as saving?
Paying down debt above your expected investment return is economically the same as saving, and it lowers future spending, so it shortens the timeline twice. Mortgage principal is closer to a grey area: it builds net worth, but a house you live in does not fund withdrawals.
Why does the curve flatten at high savings rates?
Because the target falls as fast as the contributions rise. At 80% savings you are only funding 20% of your income, so the number you need is small; the remaining years are dominated by the raw arithmetic of filling a small pot, not by compounding.
Is 4% still a safe withdrawal rate?
It comes from historical US data over roughly thirty-year retirements and remains a reasonable planning anchor. Longer retirements, higher fees, or a bad first decade of returns all strain it, which is why some people plan at 3–3.5%. Change the rate in the calculator and watch the target move.