How to budget as a couple without a joint account

You don’t have to merge bank accounts to run one household budget. You need three agreements: what counts as shared, how you split it, and when you look at the numbers together. Here is a way to set that up in one evening.

Free forever for two · No card · 14 days of Plus included

Step 1. Agree on what is shared

Write down what the two of you pay for together: rent or mortgage, utilities, groceries, the car, the kids, holidays. Everything else stays personal. The line can move later, but you need one to start, and it is much easier to draw before the first argument than after it.

Step 2. Choose how you split

• Equal: each pays half of the shared costs. Simple, and fair when your incomes are close.
• Proportional: each pays the same share of their income, so whoever earns more pays more.
• Pooled: each puts an agreed amount into a shared pot every month, and the shared costs come out of it.

Step 3. Set budgets for the shared categories

Put a monthly budget on the categories you share: groceries, eating out, transport, home, kids. You don’t need all of them on day one; three or four you actually watch are enough. Keep personal spending out of the shared budget, or mark it private so it does not crowd the family view.

Step 4–6. Track together, check in, adjust

The plan only works if both of you see the same numbers. Each of you adds what you spend, from your own phone, right after paying; it takes a few seconds and saves the end-of-month detective work.

A spreadsheet can do this too: our free family budget template uses the same columns as Fam108’s export. An app is easier when two people enter expenses at the same time from different phones and want to see what is left in a category before paying.

Once a month, sit down for fifteen minutes: what went over, what was left, whether the split still feels fair. Change one thing at a time, and keep a little money each that nobody has to explain.

Doing this in Fam108

Fam108 is free for two: one shared budget on both phones, budgets by category, who spent how much on the home screen, and private expenses hidden from the rest of the family. With Plus ($3.99 a month or $29.99 a year), a trip or a project can have its own budget.

What Fam108 will not do for you

It does not calculate who owes whom. It shows who paid for what and who spent how much, so the settle-up in step 2 is a sum you do yourselves once a month. And it never connects to your banks: every expense is entered by hand.