Why Some Costs Are Not Included in Your Calculation

Many parents are surprised that some real-life expenses are not included in Child Maintenance calculations.

This page explains why that happens and provides guidance on what you can do next.

Dont rush --> understand your situation first.

Why Certain Costs Are Not Included

The calculation you received is based on standard Child Maintenance rules. These rules do not automatically take into account certain expenses such as:

This can sometimes result in a figure that does not fully reflect your real financial situation.

What You Should Do First

Before You Take the Next Step

Choose the correct route based on your situation. This avoids delays and unnecessary costs.


--> If Your Issue Is About MONEY (Calculation)

  • Weekly payment is wrong
  • Income used is incorrect
  • Shared care not applied properly
  • Overpayments not recognised

--> This is a decision issue --> Use the 3-tier packages below: (MR --> Tribunal if needed).


--> If Your Issue Is About HOW YOUR CASE WAS HANDLED

  • Evidence ignored
  • Delays or no response
  • Incorrect advice
  • Missing or incorrect records

--> This is a handling issue
--> Follow the 13-step process (ICU/ICE / complaints route) View full 13-step process


--> If You Are Not Sure

Start with Steps 1 --> 4 to confirm your position before taking further action.

View Steps 1 --> 4 (Build Your Evidence First)

Choosing the correct route is important. Calculation issues follow the MR process, while handling issues follow the complaints process.

Most successful outcomes come from understanding your position and acting on it correctly.

Already gathered your evidence or confident in your position? You can move straight to the next stage below.

Choose Your Next Step

If you have reviewed your calculation and understand your position, choose the level of support you need below.

Each option is designed to help you move forward --> whether you need clarity, structure, or a complete solution.

Package Tier 1 --> £9.99

Clear explanation of your next steps you should take. Best if you are confident handling the process yourself.

Get Tier 1 --> £9.99

Package Tier 2 --> £24.99

Step-by-step guidance to organise your evidence, identify key issues, and build a stronger position before taking action.

Get Tier 2 --> £24.99

Package Tier 3 --> £44.99

Complete structured solution with templates and guidance to help you present your case clearly for a review or tribunal.

Most Complete Option

Get Full Package --> £44.99

Common Questions About Your Child Maintenance Calculation

Why is my child maintenance payment so high?

Child maintenance is based mainly on gross income, number of children, and shared care. Many everyday expenses are not included, which can make the final amount feel higher than expected.

Why are my travel or childcare costs not included?

Standard CMS calculations do not automatically include costs such as travel, school fees, or voluntary financial support. These are only considered in specific circumstances and usually require further review or evidence.

Can I challenge my child maintenance calculation?

Yes. You can click a package above for guidance on how to review or challenge the calculation.

What evidence do I need to challenge a calculation?

You should gather documents that support your situation, such as proof of income, travel costs, childcare expenses, or communication records. Strong evidence can improve the chances of a successful review.

Will CMS ever take my extra costs into account?

In some cases, certain expenses may be considered, but this is not automatic. Each case depends on the evidence provided and whether the situation meets specific criteria.

What should I do if I disagree with the result?

Start by reviewing your calculation carefully, then consider using the guidance in the packages above to take further steps.