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.

Free bill split calculator — split bills fairly | plan/ria

This is a free bill split calculator for couples, partners, and flatmates in the UK. Compare equal (50/50) splits with income-based splits for rent, bills, or any shared cost. No signup required, and no personal financial data is required to use this tool.