How this calculator helps
A fair split depends on the agreement between the people paying. This calculator shows the arithmetic behind two common methods without deciding which is right for you.
Before you decide
Only include take-home income if that is the basis you want to use. You can agree to exclude personal debts or irregular costs from your shared-bill total.
A practical example
If two people take home £2,200 and £1,800, their income shares are 55% and 45%. For £1,000 in shared bills, that would be £550 and £450.
Frequently asked question
Is one method always fairer?
No. Expenses, caring responsibilities and individual circumstances can matter as much as the percentages.
What next?
Change the figures and see the estimate update instantly. For another practical check, browse our free tools library or try the daily challenge.