Shared Care6 min read15 February 2025

How Does Shared Care Affect Child Maintenance?

If you share overnight care of your children, the CMS will reduce your maintenance payments. Here's exactly how it works.

What counts as shared care?

For child maintenance purposes, shared care means the paying parent has the child staying with them overnight. Daytime visits do not count, no matter how long they are. The CMS counts the number of nights per year the child spends with the paying parent.

The shared care discount table

Nights/year with paying parentApprox. nights/weekReduction
0–51Less than 1No reduction
52–103Roughly 11/7 reduction
104–155Roughly 22/7 reduction
156–174Roughly 33/7 reduction, then subtract £7/week
175+Half the time50% reduction, then subtract £7/week

Why do I still pay child support with 50/50 custody?

Even with equal shared care (175+ nights), if one parent earns significantly more than the other, the CMS may still calculate a payment from the higher earner to the lower earner. The maximum reduction at 50/50 is half the maintenance amount minus £7/week - which can bring payments very low but rarely to absolute zero.

This is because child maintenance is partly about equalising the financial resources available to the child in each household, not just about time.

A worked example

Paying parent earns £30,000 gross per year (£576/week), 1 child. No shared care: 12% × £576 = £69.12/week. With 104 nights/year (2/7 reduction): £69.12 × 5/7 = £49.37/week.

Tip: Keep a record of every overnight stay. Disagreements are common - a diary, texts, or school records can be crucial if disputed.

Frequently Asked Questions

Do school holidays count as shared care nights?
Yes. All overnight stays count towards the annual total, including school holidays, weekends, and special occasions.
What if my ex disputes my shared care claim?
The CMS will ask both parties for evidence. You can use a diary, school records, medical appointments, text messages, or other documented evidence of overnight stays.

Want to know exactly what you'd pay?

Use our free net pay calculator - enter your take-home pay, not gross, for a realistic figure.

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Disclaimer: This article provides general information only and is not legal or financial advice. Rules and rates can change - always verify with the official UK government website or seek professional advice.