How to Split Expenses When You Have Different Incomes (2026)
50/50 sounds fair — but when one partner earns significantly more than the other, it isn't. This guide explains the proportional method: the way to divide shared costs that actually feels equitable to both people.
The problem with 50/50 when incomes differ
If you earn €3,000 and your partner earns €1,500, paying half each on rent and bills means they're putting up a much higher percentage of their income. Over time, that imbalance creates silent resentment — one person can't save, the other doesn't understand why there's tension.
The proportional method: real fairness
How it works
Each person pays a percentage of shared expenses equal to their share of total household income.
Formula: your % = your income ÷ total household income
Each person contributes the same proportion of their income. That's equity — not just equality.
What to include (and what to keep separate)
Share these: rent or mortgage, utilities (electricity, water, internet), groceries, shared leisure, home insurance.
Keep separate: personal clothing, individual hobbies, phone plans, individual subscriptions, nights out with friends.
Key: Revisit the percentages whenever there's an income change — a raise, a job change, going part-time. The proportional method only works if the numbers are current.
What if the income gap is very large?
If one partner earns three times more, full proportional splitting can feel emotionally unbalanced even if it's mathematically fair. Many couples use a hybrid: proportional for fixed costs (rent, utilities) and 50/50 for leisure. There's no single right answer — what matters is that both feel comfortable with the agreement.
Put proportional splitting into practice
Splitt tracks who owes what based on your agreed percentages — no spreadsheets, no awkward conversations.
Try Splitt freeFrequently asked questions
How should couples split expenses when one earns more?
The fairest method is proportional splitting: each partner pays a percentage of shared expenses equal to their share of total household income.
Is 50/50 fair when incomes are different?
50/50 is simple but not always fair. If one earns twice as much, paying the same amount represents very different relative effort. The proportional method resolves this.
What expenses should couples share?
Household expenses (rent, utilities, groceries), shared leisure activities, and joint insurance. Personal expenses are typically kept separate.