The renter-side equivalent of the home-buying 28/36 rule — landlords commonly require rent at or below 30% of gross income.
How it works
Monthly rent divided by gross monthly income gives the rent-to-income ratio as a percentage.
What this does not include
This uses gross (pre-tax) income, following the common landlord screening convention — it doesn’t reflect actual take-home pay, which is lower and makes the real cost burden feel higher than the ratio alone suggests.
How to use this calculator
- Enter monthly rent and gross monthly income.
A worked example
$1,500 monthly rent against $5,000 gross monthly income: ratio = 1,500 ÷ 5,000 × 100 = 30% — right at the commonly cited affordability guideline.
$2,000 rent against the same $5,000 income: ratio = 40% — flagged as a warning level, above the typical 30% benchmark.
What the variables mean
| Variable | Meaning |
|---|---|
| Monthly rent | Total monthly rent payment |
| Gross monthly income | Income before taxes and deductions |
Edge cases worth knowing
The 30% guideline is a rule of thumb, not a hard financial law. Someone with low other debts and expenses may comfortably afford a higher ratio, while someone with significant other obligations may find even 30% tight.
This uses gross income, not take-home pay — a common point of confusion, since the actual cash available after taxes is meaningfully lower than the gross figure used here.
Frequently asked questions
Why do landlords use 30% as a threshold?
It traces to a historical HUD affordability standard and has become a widely adopted, if informal, screening convention across the rental industry.
Is 30% always the right target?
Not necessarily — someone with low debt and expenses elsewhere might comfortably afford more than 30%, while someone with significant other obligations might need to stay well under it.
Does this ratio account for utilities and other housing costs?
No — this covers rent alone; utilities, renters insurance, and parking are separate costs on top of the rent figure used here.
