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THE ADULTFILES
Tool 01 · pairs with FILE 001
What’s a file?
Every topic is a file: one real problem, checked against the sources, with the fix and a free tool.

Rent calculator

How much rent can you actually afford? Start with the money that actually lands in your account. Your verdict updates as you type.

Your numbers

$3,400 take-home, like Jordan in FILE 001
Step 1: Start with what lands

Step 1: Start with what lands

Take-home pay, not salary
CAD
Use the amount that actually lands in your account.
Only know your salary?

Find your take-home: look at your pay stub’s net pay, the amount after taxes and deductions. Paid every 2 weeks? Your monthly take-home = paycheck × 26 ÷ 12.

Why we don’t guess it: taxes depend on your state or province and on your deductions, so a guess from salary could be off by a lot.

Step 2: Subtract your must-pays

Step 2: Subtract your must-pays

What you pay no matter where you live

Only things you’d pay no matter where you live. Don’t include rent or utilities here.

  • CAD
  • CAD
  • CAD
  • CAD
  • CAD

Must-pays: $0 / month
Step 3: Pay future-you first

Step 3: Pay future-you first

Save 10–20% of take-home
10% · $0 / month
Step 4: The place

Step 4: The place

The whole cost, not just the rent
CAD
Splitting with roommates?
CAD
CAD
CAD
CAD
extras $0 + rent $0 = whole housing cost $0

A gut check, not financial advice. Based on money you actually have.

The verdict

Updates as you type
NO VERDICT YET

Add your take-home pay and the rent. Your verdict appears here as you type.

Housing % of take-home
—
Your rent range
—
Left each month
—
$3,400 take-home, like Jordan in FILE 001
No verdict yet.
How it works

The formula, in the open

It’s the fix from FILE 001, as math: start with what lands, subtract your must-pays, pay future-you first, then check the whole cost of the place.

Pay frequency: every 2 weeks = paycheck × 26 ÷ 12 · weekly = × 52 ÷ 12 · twice a month = × 2. Roommates: rent, utilities and internet are split evenly; renters insurance and parking aren’t, and every result is your share. The math is identical in the US and Canada; the toggle changes the currency, the typical costs and the rental rules shown.

Whole housing cost
= rent + utilities + internet + insurance + parking
Housing % of take-home
= whole housing cost ÷ take-home
Verdict stamp
= under 30% SAFE · 30–40% STRETCH · over 40% DANGER
Comfortable rent
= (30% × take-home) − (utilities + internet + insurance + parking)
Stretch rent
= (40% × take-home) − (utilities + internet + insurance + parking)
Absolute max rent
= take-home − must-pays − savings − extras (leaves you $0; not a plan)
Left each month
= take-home − must-pays − savings − whole housing cost
Move-in money target
= 2–3× rent
The file behind the toolFILE 001 · How much rent can you actually afford?Watch Jordan make the 5 mistakes, then get the 3-step fix. 16 min.Open the file
Sources for the math
SOURCE 01Sept 2014

HUD USER, PD&R Edge · “Rental Burdens: Rethinking Affordability Measures”

“capped public housing rent at 25 percent of a resident’s income” / “Congress raised the cap to 30 percent in 1981.”

HUD has since taken this article down; the link goes to the Internet Archive’s saved copy.

web.archive.org (opens in a new tab)
SOURCE 05Accessed Sept 2026

CMHC · About Affordable Housing in Canada

“housing is considered ‘affordable’ if it costs less than 30% of a household’s before-tax income”

cmhc-schl.gc.ca (opens in a new tab)
SOURCE 06Accessed Sept 2026

U.S. Census Bureau · Definition of gross rent

“contract rent plus the estimated average monthly cost of utilities”

census.gov (opens in a new tab)