Splitting expenses when incomes are different
Halves feel fair until the incomes are far apart: half the rent weighs far more on whoever earns less. This calculator splits shared expenses in proportion to what each person actually takes home.
What comes in each month, after tax.
What comes in each month, after tax.
Rent, bills, groceries — whatever you pay together.
Proportional split
Fill in both incomes and the total of your shared expenses.
The arithmetic happens in your browser. Nothing is sent to a server, nothing is stored, and the figures disappear the moment you reload the page.
The method, in two lines
Add both net incomes together. Each person's share of the shared expenses is the same percentage their income represents of that total.
If A earns €1,500 and B earns €1,000, joint income is €2,500. A covers 60% of the shared expenses and B covers 40% — rather than 50/50, which would take a much larger bite out of B's own salary.
It is a starting point for a conversation, not a rule. Plenty of couples adjust the proportion for debts, children from earlier relationships, individual saving or health costs.
What this does not settle
It is an educational tool, not financial advice. The split it produces only means anything if both people agree to it.
It uses monthly net income. Irregular earnings — freelance work, commission, seasonal income — usually work better as an average across several months.
It ignores debts, savings, assets brought into the relationship and personal spending. None of that fits inside a percentage.
After the maths, the follow-through.
Bolso records shared expenses with the payer, the participants and each person's share — with no bank accounts connected.
