Free tool
Split bills by days present
Enter the period's bills and how many days each housemate spent at home: the tool produces an exact proportional split.
Bills for the period
Days present
Days spent in the property during the billed period (30 for a full month).
Total
€0
What everyone owes
Enter the amounts to see the split.
Each housemate pays in proportion to actual time at home, which smooths out long absences without renegotiating the tenancy.
Everything is computed in your browser: nothing is stored or sent.
Whole-cent arithmetic with a largest-remainder distribution of the leftovers: the shares are checked against the total by automated tests.
For tracking several expenses over time, with your friends.
When presence changes everything
A housemate away for three weeks on placement heated nothing, lit nothing and showered nowhere: charging them a third of the electricity like everyone else is hard to defend. Splitting variable bills by days present settles that without a debate every invoice.
The method fits energy and water well, since consumption follows occupancy directly. It is more debatable for internet or insurance, which cost the same whether anyone is home or not.
Separate fixed from variable costs
The healthiest practice is to treat the two categories differently: fixed costs — rent, insurance, the broadband line — stay on your usual key, while variable bills follow presence.
So use this tool for the variable part and the rent split calculator for the fixed part, then add the two results to get what each person owes for the month.
Counting days without overthinking it
There is no need for hour-by-hour records: count nights spent at home, round to the day and set a clear threshold, for example "an absence counts from three consecutive nights". A simple rule applied to everyone beats precise accounting that nobody keeps.
Frequently asked questions
Should internet follow this rule?
Broadband costs the same regardless of occupancy: it can be split evenly or by any rule the household agrees. You can enter it here if your group decided otherwise.
Which period should I count?
The period the bill covers. For a two-monthly invoice, count days present across both months, not just the last one.
What about a housemate away all month?
Zero days means zero share of the variable bills. They still owe fixed costs and rent, which do not depend on presence.
Editorial review — Written and reviewed by the Pivunio team. The methods described here are the ones the app itself uses, and they are covered by automated tests.