Budgeting & Income
Rent Split Calculator
An even 50/50 split isn't always fair when incomes differ. Enter the total rent and each person's income to split it proportionally — the higher earner pays more, but each pays the same share of their paycheck. The even split is shown for comparison.
Tested against worked examplesHow we verify
Person A pays: $1,200
Person A pays
$1,200
Their income-proportional share of the rent.
- Person B pays
- $800
- If split evenly (50/50)
- $1,000
- Rent as % of combined income
- 20%
For comparison.
Each pays this share of their own income under the fair split.
Compare scenariosTry three values of one input
| Total monthly rent | |||
|---|---|---|---|
| Person A pays | $1,080 | $1,200+$120 | $1,320+$240 |
| Person B pays | $720 | $800+$80 | $880+$160 |
| If split evenly (50/50) | $900 | $1,000+$100 | $1,100+$200 |
| Rent as % of combined income | 18% | 20%+2% | 22%+4% |
Every other input stays at the value you set above — currently $2,000 for total monthly rent. Differences are measured against the first column.
Saved scenariosSave this calculation
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How this calculator works
Each person's share = total rent × (their income ÷ combined income). When both incomes are zero, it falls back to an even 50/50 split. The even-split figure is simply half the rent, shown for comparison.
Covers two people splitting by income. For more roommates or adjustments for room size, apply the same proportional idea across all incomes, then negotiate any premium for larger or en-suite rooms.
What this assumes
- Splitting by income share, which is one convention among several — equal split and split by room size are equally legitimate.
- Room sizes, private bathrooms and parking are not weighted unless you adjust the inputs.
- Shared bills are not included unless entered.
What changes this number
- Which convention you agree
- The calculation is trivial; the agreement is not. Decide the basis before the numbers.
- Income disparity
- The wider the gap, the more the choice of convention changes each person's share.
- Non-rent costs
- Utilities, internet and council charges are often split differently from rent, and are worth agreeing at the same time.
A worked example
Take the $2,000 rent, $6k & $4k scenario. These figures are produced by the calculator above, not written alongside it, so they always match what the tool returns.
What you enter
- Total monthly rent
- $2,000
- Person A — monthly income
- $6,000
- Person B — monthly income
- $4,000
What it returns
- Person A pays
- $1,200
- Person B pays
- $800
- If split evenly (50/50)
- $1,000
- Rent as % of combined income
- 20%
Try an example
Frequently asked questions
How should roommates split rent fairly?
A common fair method is to split in proportion to income rather than evenly, so each person pays the same percentage of what they earn. If one roommate earns $6,000 and the other $4,000, they'd pay 60% and 40% of the rent. Room size and amenities are sometimes factored in too.
How do you split rent by income?
Add both incomes, then each person pays their income divided by the total, times the rent. With incomes of $6,000 and $4,000 (total $10,000) and $2,000 rent, Person A pays $2,000 × (6,000 ÷ 10,000) = $1,200, and Person B pays $800. Both spend 20% of their income on rent.
Should couples split rent 50/50 or by income?
There's no single right answer — it's a values conversation. A 50/50 split is simple and treats the home as equally shared; an income-proportional split feels fairer when earnings differ a lot. Many couples use proportional splitting for rent and shared bills to keep each person's financial strain similar.
What about different room sizes?
When bedrooms differ meaningfully in size or have private bathrooms, roommates often adjust shares for that too — starting from an even or income-based split and adding a premium for the better room. This calculator handles the income split; agree on any room adjustment separately.
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Disclaimer: DayCents provides this calculator for educational purposes only. Results are estimates based on your inputs and the stated assumptions — they are not financial advice, a quote, or an offer of credit. Consult a qualified financial professional before making major money decisions.