Challenging your calculation
Date last updated: 19 October 2017
Your options if you disagree with your child maintenance calculation
The information you need depends on whether you receive child maintenance through the Child Support Agency (‘CSA’) or the Child Maintenance Service (‘CMS’).
Check your records to see which scheme you are using and then select the information that applies to you.
CSA cases: how to challenge your calculation
Read our information about the options open to you if you think that your child maintenance calculation is wrong and you get child maintenance through the Child Support Agency.
CMS cases: how to challenge your calculation
If you think the Child Maintenance Service has given you the wrong calculation of how much child maintenance you should receive you should read our detailed guidance on how to challenge the calculation.