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How to read rent / take-home

A field guide for the ratio on this site · Not advice

Every full-model page here reports HUD rent ÷ monthly take-home. That is a filter, not a verdict. This page is how we expect you to argue with it.

What 30% actually is

Housing counselors and lenders have used “about 30% of income on housing” for decades. It is a planning shorthand. It is not a law, and it is not adjusted for a two-hour commute, a roommate, student loans, or a partner who already pays the mortgage.

On this site, income means modeled take-home, not gross. That is stricter than the cocktail-party version of the rule. A 32% ratio on net can still be a 22% ratio on gross — which is why we refuse to show only the headline salary.

When a “good” ratio is still a bad move

  • HUD is a metro average. Downtown Miami and a far Houston suburb can both sit in one FMR area. If you will not live in the average ZIP, override rent.
  • Insurance and fees sit on top. Wind, flood, HOA, and parking often do not appear in FMR. Add them to the listing field or treat the ratio as optimistic.
  • The job is the rent. A cheap city with no role in your field is not a bargain. Run Compare against the city where the work actually is.
  • Start-date slip. A fine ratio with two months of unpaid gap is a cash problem. Use Before you accept for that check.

What to type into the estimator

  1. Gross as written in the offer, not the “on-target” number with a bonus you have never received.
  2. Your real 401(k) deferral, or zero if you will not defer in year one.
  3. Filing status you will actually use, not the one that makes the page look nicer.
  4. A listing quote for the bedroom count you will rent — then glance at HUD only as a sanity check.

Lock those assumptions in a Decision Brief before you text a screenshot. Two people arguing about “$120k in Austin” are usually arguing about different rents.

Related

Estimator · Methodology · Houston $120k example