How much should I save each month?
As a starting point, save 20% of your take-home pay. That figure is a default, not an answer — the number that matters is the one that clears your specific goals on your specific timeline.
Twenty percent of take-home pay is the number most rules of thumb converge on, and it is a reasonable place to begin. It is a default rather than an answer, though, because it was never derived from your rent, your income stability, or what you are saving for.
Work backwards from goals instead. Each goal has an amount and a date, and dividing one by the other gives a monthly figure. An emergency fund of three months' essential spending, built over a year, is that target divided by twelve. A down payment in five years is the same arithmetic on a longer clock. Add the monthly figures together and you have a required rate rather than a borrowed one.
Then check it against reality: subtract fixed costs from take-home pay, and see what is left. If the required rate does not fit, something has to move — the date, the amount, the fixed costs, or the income. That is a more useful conversation than deciding whether 20% is the right rule.
Two adjustments matter more than the headline percentage. First, order: an emergency fund and any debt above roughly 8% interest come before long-term investing, because the guaranteed return from clearing high-interest debt beats the expected return from the market. Second, automation: money moved on payday is saved at a materially higher rate than money left to be saved at month end, and that gap is larger than the difference between an 18% and a 22% target.
Finally, measure the rate you actually achieve rather than the one you intend. A savings rate calculated from real transactions over three months is the only version of this number that predicts anything.
Common follow-ups
Is 20% of gross or net income?
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Net — your take-home pay after tax and payroll deductions. A 20% target measured against gross income is a substantially larger commitment than it appears, because you never receive the difference.
Does paying down debt count as saving?
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Yes, for anything above your expected investment return. Clearing a 20% credit card balance is a guaranteed 20% return, which no portfolio offers. Below roughly 5%, a long mortgage for instance, the case for investing instead is stronger.
What if I cannot save 20%?
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Save what fits and automate it. The difference between saving nothing and saving 5% is a change in kind; the difference between 15% and 20% is a change in degree. Raise the rate when income rises rather than trying to reach a target by force.
Should employer pension matching count toward the rate?
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Count matched contributions toward your retirement goal but not toward your own rate, and always contribute enough to collect the full match first. An unclaimed match is the only guaranteed 50-100% return available to most people.