Calculate your child maintenance

You can use this calculator to work out an amount of child maintenance for your children. It will not send your details to the Department for Work and Pensions (DWP).

This service is also available in Welsh (Cymraeg).

The calculator:

  • gives you an amount to discuss with the other parent if you’re arranging child maintenance yourselves - you do not have to use it
  • shows you what the government is likely to work out for you

You will not have anything to pay through the Child Maintenance Service if you are:

  • sharing care equally with the other parent
  • a full-time student with no income
  • in prison

You can find out more about making an arrangement with the other parent.

Start now

Before you start

You’ll need details of the following for the parent who’ll be paying:

  • their income, including State Pension
  • any benefits they get
  • the number of nights your child stays with them