How much of your paycheck should go to rent?

The advice you have heard is to keep rent under 30% of your income. It is a reasonable anchor, but it hides two things worth knowing before you sign a lease.

First, the rule was built around gross income. Budget against your take-home pay instead — the number that actually lands in your account — and the same apartment can quietly eat 35% or 40% of what you have to work with.

Second, rent is rarely the whole housing cost. Renters insurance, utilities that were bundled at your last place, a longer commute, parking — they stack up. A place that looks like 28% on the listing can settle near a third of your budget by the time you have lived in it for a month.

A quick test: after rent and every recurring bill clears, can you still move money to savings without thinking about it? If the answer is no, the rent is too high regardless of what the percentage says.

None of this means you have failed if you are over 30%. Plenty of people in expensive cities spend more and make it work by keeping other categories lean. The point is to decide that on purpose, with the real numbers in front of you, rather than discovering it in March.