Our calculator can give you an indication of the amount of child maintenance you might pay* or receive based on the rules for the Child Support Agency's (CSA's) current scheme.
Please note:
The figure for child maintenance that our calculator provides is only
an indication. This figure may be different from the final figure the
CSA calculates if you choose to arrange child maintenance through the
CSA.
This calculator doesn't apply to child maintenance calculated by the CSA before March 2003.
There are some circumstances which are not covered by the calculator. These include:
- where child maintenance will be shared between two or more parents with the main day-to-day care
- variations for exceptional circumstances.
* See which benefits the CSA takes into account
Working Tax Credit is counted as part of net income if the parent without main day to day care's earnings are higher than their partner's earnings. When parents earn the same, we include half of the Working Tax Credit in the child maintenance calculation.

