Enter the rent and each person’s income to calculate proportional monthly payments and compare them with a 50/50 split.
Monthly proposal
See how proportional payments differ from an equal split.
How it works
Each person’s payment is calculated from their share of the combined selected income. If one person earns 60% of the combined income, they pay 60% of the rent. This means everyone contributes the same percentage of their selected monthly income.
Person’s rent = total rent × person’s income ÷ combined income
Annual income is divided by 12 before the calculation. Final amounts are allocated in whole cents so all payments add exactly to the rent.
Choose one basis
Take-home income reflects money available after deductions. Gross income is often easier for roommates to compare without discussing personal deductions. Whichever basis you choose, use it consistently for every participant.
Use the result
The calculator shows proportional payments beside a 50/50 comparison. Copy the summary or share a proposal link that contains the calculated amounts without including the original income entries.
