If either parent's circumstances change, it can mean that we need to change the amount of child maintenance that should be paid.
Parents should tell us straight away if any of the following changes:
Changes to pre-2003 cases
We changed the maintenance calculation in 2003 to make it simpler and clearer. If your maintenance agreement was set up before then, in time, you may have to move to the new rules. Find out more here about when and how this happens.
If you fail to give us the information we need, or you give us information that you know is false, we can take you to court and you could be fined.
