Tool
Income-proportional expense split
Calculate each person's fair share of shared expenses based on their income — proportional, equal 50/50, or a hybrid of both.
Free tools
Financial calculators
Practical tools that show you the exact math behind fair expense splits and debt settlements — the same logic used inside Boney.
Tool
Who owes whom
Enter shared expenses (who paid, who participates, how much) and get the minimal set of transfers to settle all debts in one pass.