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Everything you need to know about the UK Child Maintenance Service

7 articles

Calculations
Calculations14 min read

Do Pension Contributions Reduce Child Maintenance? Yes

Pensions come off your assessed income, but only automatically in some schemes. Pay into a personal pension and the CMS will not know unless you tell them.

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Calculations15 min read

Sole Trader vs Limited Company: Why Your CMS Bill Differs

Same profit, five times the difference in maintenance. Why directors are assessed on salary alone, and the free variation that closes the gap.

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Calculations8 min readpaying parent

Self-Employed? How the CMS Really Works Out What You Owe

The CMS uses taxable profit from your Self Assessment, which can be two years out of date. How to get that changed, and which expenses actually reduce it.

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Calculations10 min readpaying parent

Company Director? The CMS Only Counts Your Salary

Dividends, retained profits and director's loans sit outside the standard calculation. The free variation that pulls them back in, and when it succeeds.

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Calculations4 min read

Is Child Maintenance Taxable? No, and Nobody Declares It

You pay no tax on maintenance you receive, and you get no relief on maintenance you pay. What that means for your benefits and your tax return.

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Calculations7 min read

What Counts as Income for Child Maintenance? And What Doesn't

The CMS uses gross income straight from HMRC. Bonuses and overtime count. Your new partner's wages do not. Dividends only count if someone asks.

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Calculations10 min read

How Is Child Maintenance Calculated? The Full CMS Formula

12% for one child, 16% for two, 19% for three. That is the headline. The income bands, deductions and shared care rules change the real figure.

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