The House of Commons Library has published a useful briefing note setting out how Child Maintenance Service
The note considers how the CMS collates income data, the annual review process (and the periodic income check in cases where the non-resident parent submits their own data), and when a change in income does – and doesn't – have to be reported to the CMS. It also highlights the policy rationale for the 25% threshold for a change in income to affect the child maintenance calculation, and why only the non-resident parent's income is taken into account.
Download the full briefing from the Parliament website.
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