Child Maintenance Details
📊 CMS Calculation Breakdown
Child maintenance is a financial arrangement between separated parents to help cover living costs for a child under 16 (or under 20 if in full-time non-advanced education).
The Child Maintenance Service (CMS) uses a statutory formula based on the paying parent’s gross weekly income, the number of qualifying children, and the number of overnight stays spent with the paying parent.
⚙️ CMS Statutory Rates & Shared Care Discount Rules
1. CMS Percentage Rate Bands (Gross Weekly Income)
- Basic Rate (£200 to £800/wk):
- 1 Child: 12% of gross weekly income.
- 2 Children: 16% of gross weekly income.
- 3+ Children: 19% of gross weekly income.
- Basic Plus Rate (£800 to £3,000/wk):
- Additional income between £800 and £3,000 is taxed at reduced percentages (9% for 1 child, 12% for 2 children, 15% for 3+ children).
- Reduced Rate (£100 to £200/wk): Fixed base plus reduced percentage.
- Flat Rate (£7 to £100/wk): Fixed flat payment of £7.00 per week.
2. Shared Care Overnight Discounts
If the child stays overnight with the paying parent on average at least 1 night a week (52 nights a year), maintenance payments are discounted:
- 52 to 103 nights/yr: 1/7th deduction (14.3% discount).
- 104 to 155 nights/yr: 2/7ths deduction (28.6% discount).
- 156 to 174 nights/yr: 3/7ths deduction (42.9% discount).
- 175+ nights/yr: 50% deduction plus extra £7/week reduction per child.
📊 Practical Child Maintenance Worked Examples
Below are two worked calculation examples demonstrating statutory CMS calculations:
- Gross weekly income: **£600.00**
- Qualifying children: **1 Child**
- CMS Basic Rate: **12%**
Calculation: £600.00 × 12% = £72.00 per week. Shared care discount = £0.00.
- Base weekly calculation: **£72.00 / week**
- Overnight stays: **60 nights / year** (52 to 103 band)
- Shared care discount: **1/7th deduction** (£72.00 ÷ 7 = £10.29 reduction)
Calculation: £72.00 - £10.29 = £61.71 per week.
📑 Common Pitfalls & Legal Warnings
- Calculating on Net Salary Instead of Gross Income: The CMS scheme introduced in 2012 calculates maintenance using gross weekly income (before Income Tax and NI) as reported to HMRC via PAYE, not net take-home pay.
- Ignoring Pension Contributions: Contributions to a pension scheme are deducted from gross income before the CMS percentage is applied. Increasing workplace pension contributions reduces your statutory child maintenance liability while increasing your retirement fund.
- Failing to Document Shared Care Overnight Stays: If parents disagree on overnight care frequencies, the CMS may ask for utility bills, school calendars, or medical records to verify claims. Keeping a clear shared care log is essential.
❓ Frequently Asked Questions (FAQ)
The Child Maintenance Service (CMS) has legal enforcement powers to collect unpaid maintenance directly from wages via a Deduction from Earnings Order, take money from bank accounts, or take legal action through the courts.
Child maintenance must be paid until the child reaches age 16, or age 20 if they remain in full-time non-advanced education (such as A-levels or college courses). Payments stop if the child enters higher university education or full-time employment.
No. Child maintenance received by a caring parent is completely ignored as income when calculating Universal Credit payments. You keep 100% of your Universal Credit alongside child maintenance.
No. Child maintenance payments are completely tax-free for the receiving parent. You do not need to report child maintenance income on a Self Assessment tax return.