Free tool
Rent split calculator
Rent is usually the biggest line in a shared budget, and splitting it down the middle rarely feels even when incomes differ. Enter both monthly take-home incomes and the rent to see an income-weighted split in euros next to the 50/50 version — and what percentage of each income the rent actually takes.
Calculator
Rent split calculator
Enter two take-home incomes and your monthly rent. Results update as you type.
Add both incomes and your monthly rent to see the two splits side by side.
How the income-weighted rent split works
- 01 — Add both monthly take-home incomes to get the combined household income.
- 02 — Each person's rent share is their income divided by the combined income, applied to the rent:your rent = (your income ÷ combined income) × monthly rent
- 03 — Compare with the 50/50 column. The percentages show what the rent costs each person relative to their own income — that gap is the fairness difference.
Worked example
Incomes of €2,200 and €3,300 with rent of €1,650. Combined income is €5,500, so the income-weighted rent is €660 and €990 — 30% of each income. Under 50/50 both pay €825, which is 37.5% of the lower income but only 25% of the higher one.
Adjusting for rooms and extras
For roommates, the income split is a starting point rather than the final word. If one bedroom is noticeably larger, has an en-suite or the only balcony, agree a small premium — commonly 5–15% of the rent — move that amount to whoever takes the better room, then split what is left by income. Write the agreed percentages down once, so it does not get renegotiated every month.
Questions people ask
- How should couples split rent when one earns more?
- Weight the rent by income: each person pays the same share of what they earn. If one partner earns 60% of the combined take-home pay, they cover 60% of the rent. The rent then takes an equal bite out of both budgets.
- Should roommates split rent equally?
- Equal splits work when the rooms and incomes are similar. When bedrooms differ in size, or incomes differ a lot, adjust: start from the income-weighted split and then nudge for room size, en-suites or storage.
- Should the rent split include utilities?
- Keep them separate first, so you can see the rent share clearly, then apply the same percentages to utilities and other shared bills. That keeps one agreed ratio across everything.
- Which income should I enter?
- Monthly take-home pay, after tax and deductions — that is the money actually available for rent. For irregular income, use a three-month average.
- Does this rent calculator store my numbers?
- No. Everything is calculated in your browser; nothing is sent anywhere or saved.
Keep the rent split running every month
SharedNest applies your income-weighted split to rent and every other shared expense automatically, tracks who paid what, and keeps personal spending private.
Create free accountRead more: how to split bills based on income · bill split calculator.