Same home. Different incomes. Your fair split.
Compare equal and income-based contributions for rent, bills or any shared expense. No signup. No bank connection. Your numbers stay in your browser.
How to compare your contributions.
Enter the total bill and choose a split method. For an equal split, each person contributes the same amount. For an income-based split, enter each person's monthly take-home income. The calculator divides the bill in proportion to those incomes.
What does an income-based split look like?
If one partner takes home £3,000 and the other £2,000, their combined income is £5,000. An income-based split assigns 60% of a shared bill to the first partner and 40% to the second. For £1,400 rent, that's £840 and £560. Each contributes 28% of their own income.
Let the numbers start a conversation.
A calculator can't decide what feels fair in your relationship. Caring responsibilities, debt, savings and other commitments can all affect your choice. Use these figures to compare approaches, then agree on a split that works for both of you. This tool provides examples, not regulated financial advice.
Read the guide to different incomes →Your questions, answered.
Is 50/50 always fair when incomes differ?
Not necessarily. A 50/50 split is simple, but when one person earns significantly more, an income-based (proportional) split can reflect each person’s ability to pay. Many households use a mix: proportional for larger costs like rent, and equal splits for smaller shared expenses.
Do I need an account to use this calculator?
No. You can use the fair split calculator in your browser without signing up. It is a free tool to help you compare split methods before you commit to an approach with your partner or flatmates.
Is my financial information stored or sent to plan/ria?
No personal financial data is required to use this tool. You enter numbers locally in your browser to see illustrative results; we do not ask you to connect a bank account or submit those figures to our servers for this calculator.
How does this relate to the relationship money quiz?
The quiz helps you see where you are with shared money as a couple or household. The calculator turns a chosen approach (equal vs income-based) into concrete amounts. Together they support a practical conversation without judgement.
Found your split?
Make room for the rest.
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