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how much child maintenance should i get

You don’t get a fixed “standard” amount of child maintenance in the UK – it’s based on the paying parent’s income, how many children there are, and how many nights they stay with each parent.

Below is a clear, step‑by‑step guide so you can estimate how much child maintenance you should get and sense‑check what you’re being offered or currently receiving.

Key factors that decide the amount

Child maintenance through the UK Child Maintenance Service (CMS) is mainly based on:

  • The paying parent’s gross weekly income (before tax, but after pension contributions).
  • The number of children they must pay for in your case.
  • Whether they have other children living with them they support.
  • How many nights per year your child spends with the paying parent (shared care reduction).

If their income is very low or unknown, special flat or default rates apply instead of a full income‑based formula.

Typical percentage rates (quick estimate)

When the paying parent earns enough for the full formula to apply, CMS broadly works like this for income up to £3,000 a week:

  • For one child : about 12% of gross weekly income.
  • For two children : about 16% of gross weekly income.
  • For three or more children : about 19% of gross weekly income.

Example (very simplified):

If the paying parent earns £500 gross a week and there are two children with you most of the time, you might expect around 16% of £500, so about £80 a week before any reductions for shared care or other children.

This is only an approximation; the official CMS formula uses bands and deductions before applying the percentage.

Special rates and minimums

If the paying parent has very low or unclear income, different rate bands apply instead of the full formula:

  • Nil rate :
    • If income is under about £7 a week or they are in some specific circumstances, they may pay £0.
  • Flat rate (often when on certain benefits) :
    • They usually pay £7 a week in total , no matter how many children the case is for.
  • Default rate (income unknown / not provided) :
    • Around £39 a week for 1 child , £51 for 2 , £64 for 3+ – total weekly amount, not per child.

The CMS says payments should not go below £7 a week when the flat rate applies.

If their gross weekly income is over £3,000 , CMS only calculates up to that cap; you can then ask a court for extra maintenance if needed.

How overnight stays reduce the amount

If your child spends a significant number of nights with the paying parent, the CMS reduces the maintenance to reflect that they are also covering day‑to‑day costs in their home.

Typical annual overnight bands and reductions per child are:

  • 52–103 nights per year : about 14.29% reduction.
  • 104–155 nights : about 28.57% reduction.
  • 156–174 nights : about 42.86% reduction.
  • 175+ nights : 50% reduction plus around £7 a week off the total.

So if you calculated £80 a week before shared care and your child stays 60 nights a year with the other parent, a reduction of about 14.29% would bring it down to roughly £68 a week.

Step‑by‑step: work out if you’re in the right ballpark

Here’s a practical way to check how much child maintenance you should get , using the CMS approach.

  1. Find their gross weekly income
    • Look at payslips or tax return, or what CMS has told you they used (you can ask CMS for the figure).
    • If the figure CMS is using differs by 25% or more from what they currently earn, they can request a recalculation.
  1. Adjust for other supported children
    • If they have other children living with them, CMS reduces the income used in the formula before applying the percentage.
  1. Apply the percentage
    • 12% for one child, 16% for two, 19% for three or more, on the adjusted income (up to the first £800 per week, and a slightly different formula for income between £800 and £3,000).
  1. Apply the overnight reduction
    • Reduce by the percentage that matches your child’s nights with the paying parent (see the bands above).
  1. Compare with what you actually get
    • If what you receive is far below this rough estimate (and they are not on benefits/very low income), it may be worth challenging or asking CMS to check again.

For a more exact number, online UK child maintenance calculators replicate the CMS rules and let you plug in income, overnights, and number of children.

What to do if the amount seems wrong

If you suspect you’re not getting what you “should” get, you have some options.

  • Use an online calculator first
    • This gives you an instant estimate before you contact anyone, and helps you feel more confident in what you’re asking for.
  • Ask the Child Maintenance Service to explain or review
    • You can request a breakdown of how they calculated the figure, and ask for a reconsideration if income or circumstances have changed or if you think they missed something (like pension contributions or other children).
  • Consider a family‑based agreement if safe and workable
    • You and the other parent can agree a higher or different structure if it better fits your child’s needs, as long as both sides are willing and there’s no abuse or coercion.
  • If the paying parent is very high‑income
    • Where their income exceeds what CMS fully accounts for, you can consider legal advice about asking the court for “top‑up” maintenance above the CMS amount.

If your situation involves sensitive issues like control, financial abuse or safety worries, it can help to speak to a family law solicitor or a support charity before trying to negotiate directly.

Bottom line: To know how much child maintenance you should get, you need the paying parent’s gross weekly income, the number of children, and the number of overnight stays, then apply the CMS percentages and reductions. Online calculators and the official CMS guidance can turn that into a concrete weekly figure you can compare with what you actually receive.

Information gathered from public forums or data available on the internet and portrayed here.