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How to Split Rent Fairly by Income (With Worked Example)
If one roommate or partner earns much more than the other, an even split can eat up a lot more of one person's paycheck. Splitting by income makes rent the same share of pay for everyone.
The formula
Your share = rent × (your income ÷ total household income)
Worked example
Rent is $2,400 a month. Maya earns $5,000 a month after tax and Jordan earns $3,000.
- Total income: $8,000
- Maya: 5,000 ÷ 8,000 = 62.5% → $1,500
- Jordan: 3,000 ÷ 8,000 = 37.5% → $900
Each of them spends 30% of their income on rent. An even split would be $1,200 each, which is 24% of Maya's income and 40% of Jordan's.
Gross or take-home pay?
Take-home pay is usually fairer because taxes take a bigger bite from higher incomes. Either works, as long as everyone uses the same kind of number.
When income splits make sense
- Couples who share finances or long-term goals
- Friends with a big income gap who want to keep living together
- Any household where everyone agrees to it upfront
Between roommates who aren't close, income splits can feel intrusive. A room-size split or a flat discount for the smaller room is often easier to agree on.
Hybrid: income plus room size
Some households split rent by income but split utilities equally. Others weight only the bedroom part of the rent. In Billsplitly, each bill has its own method, so you can mix them.
Revisit it
Incomes change. Agree to check the split every 6–12 months or whenever someone's job changes.