Splitting bills without keeping score in your head

Agree the split once, in plain terms

Down the middle, by income, or a fixed share each — any of them work, and none of them work if they were never actually said out loud. Write the rule down where both of you can see it, so a disagreement later is about the rule and not about what somebody remembers agreeing.

It does not have to be equal. It has to be written.

Record who paid, as it happens

The tally-in-the-head is the problem. Every shared cost — rent, power, water, the big shop — gets logged when it is paid, with who paid it and how it divides. Five seconds at the till beats an argument at the end of the month.

An uneven split is fine here too: record that one person covered the whole electricity bill this month and it counts toward their share, rather than pretending everything was halved.

Keep one history both people can open

Two versions of events is the same as no record. Everybody sees the same entries in the same order, so nobody has to be believed — it is written down where all of you can look.

Your own spending stays yours. What you buy on your own account is not part of the shared history; only what you record as shared is shared.

Settle up on the record, not on a feeling

At the end of the month the record says who is ahead and who is behind by how much. One transfer squares it. The conversation is 'the app says I owe you 1,400' rather than 'I feel like I've been paying for everything'.