Irish Calculators
Everyday money

Shared Expenses and Equal Money Split Calculator

Divide a total into equal shares or calculate who owes whom after unequal payments. Include only equally shared expenses; private costs and unequal ownership shares need separate treatment.

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Your numbers

One non-negative amount in EUR per person, one per line. Everyone shares the total equally.
€
Your figures stay on this device.

How the calculation works

Equal expense sharing has two stages: deciding each person's fair share and accounting for what they have already paid. This tool either divides a new total or proposes transfers that settle an existing set of equally shared payments.

Equal target shares are allocated in integer cents. Balance = paid − target share; debtors transfer to creditors until all balances are zero. In divide mode, split integer cents equally and allocate remainder cents to the first listed people.

  1. Set the shared boundary

    Include only costs that everyone has agreed to share equally. Remove personal purchases and expenses shared by only part of the group before entering totals.

  2. Allocate the total in cents

    The calculator gives everyone the same base share. Any indivisible cents are allocated to the first listed participants so all target shares add back to the full total.

  3. Reconcile payments against shares

    For settlement, an amount paid above the target makes someone a creditor; an amount below it makes them a debtor. Transfers connect debtors to creditors until these balances are cleared.

Worked example: Three people

Sample inputs demonstrate the method. They are not a forecast or product offer.

In the first example, three people have paid €120, €60 and €0. Total shared spending is €180, so each person's target is €60. Person 3 pays €60 to Person 1; Person 2 is already settled.

What would you like to do?
Settle amounts people already paid
Amounts already paid
120 60 0

Expected result

Total shared spending
€180.00
Worked example: Equal contributions

Sample inputs demonstrate the method. They are not a forecast or product offer.

What would you like to do?
Settle amounts people already paid
Amounts already paid
10 10

Expected result

Total shared spending
€20.00

Understanding your result

The transfer table shows one valid settlement. It does not claim to find the smallest possible number of transfers under every arrangement, and different valid payment routes can settle the same balances.

In divide mode, the table is a list of amounts each person should contribute. In settlement mode, it shows additional transfers after existing payments, so participants should not pay their full target share again.

Questions you might have

What does this shared expenses calculator include?

Divide a total equally or settle shared expenses from the amounts each person has already paid, with exact cent reconciliation.

Which assumptions should I check?

All entered spending is shared equally. Private expenses and unequal ownership shares should be excluded.

Choosing the right inputs

What would you like to do?
Choose settlement when people have already paid different amounts. Choose divide when you only need shares of one total and have no payment history to reconcile.
Amounts already paid
In settlement mode, enter one non-negative total per person, including a zero for anyone who paid nothing. Keep the order identifiable because results refer to numbered people.
Number of people
In divide mode, include every participant in the whole-number count. The calculator has no weights for children, room sizes or unequal ownership.

Common mistakes to avoid

  • Do not omit a participant simply because they have paid zero.
  • Do not use this equal split for an arrangement with different agreed shares.

Assumptions to check

  • All entered spending is shared equally. Private expenses and unequal ownership shares should be excluded.

Sources and method

Read our calculation and testing approach.