Child Maintenance Calculator (Estimate)
Disclaimer: This is an estimate based on general CMS guidelines and is not an official calculation.
Additional Financial Contributions (Do NOT reduce CMS automatically)
What This Result Means
This is an estimated CMS-style calculation based on the information entered.
If your real-life situation includes additional payments, shared care variations, or informal arrangements, your actual position may be different.
Some extra payments may appear as overpayments in this calculation. However, under strict CMS rules, not all additional payments are automatically recognised.
To understand whether your result is accurate — and what you can do next — continue below.
How CMS Payment Bands Work
Nil Rate: £0 if income is very low or certain benefits apply.
Flat Rate: Around £7 per week if on benefits.
Reduced Rate: Lower payments for income roughly £100–£200/week.
Basic Rate: Standard calculation used for most working parents.
What To Do After You Get Your Result
Once you calculate your estimated child maintenance, you have 3 possible situations:
- Your result looks correct → you can use it as a guide for budgeting or CMS comparison
- Your result seems too high or too low → this may mean shared care, income, or other children are not fully reflected
- You are already paying more than expected → this may indicate overpayments or a need for reassessment
To understand whether your result is accurate — and what you can do next — continue below.
If your payments don’t match your real situation, this is where most parents start.
Want More Insight?
Get a clear breakdown of your result, understand whether it is accurate, and learn what steps to take next if it does not match your real situation.
Learn More About Your Calculation