What you can use today
The budget worksheet and rent split calculator are free to use now. The mobile app is in development. Joining early access signs you up for updates; it does not create an app account.
How the examples work
The people and amounts in our illustrations are fictional. A monthly budget subtracts assigned bills, savings and personal spending from take-home income. An income-based split multiplies the shared cost by each person's share of combined take-home income. We calculate money at the selected currency's precision and assign any rounding remainder so the shares add up to the bill. These examples do not predict bank balances, interest, tax or investment returns.
How we prepare the guides
Guides explain practical options, their assumptions and their limits. Sources are linked where we use outside guidance. Our worked examples show the arithmetic so you can check it. An equal split or income-based split is an option to discuss, not a rule about what either partner owes. We update a guide's date when its content changes, not to make an unchanged page look new.
Questions or corrections
If an example is unclear or a result looks wrong, email us with the page link and a fictional example. Please leave out bank details and private transactions.