CMS considers the number of qualifying overnight stays with the paying parent over a year. The total is converted to an average number of nights per week. In eligible cases, at least 52 nights can reduce child maintenance. Holidays and alternating weekends can count, provided the paying parent is responsible for the child overnight.
What Are Overnight Stays for Child Maintenance?
Overnight stays describe nights when a child is in the paying parent's care after the parents have separated. Under the Child Maintenance Service (CMS), qualifying overnight care can affect the amount of maintenance the paying parent must pay.
Overnight care may happen regularly or occasionally. Some children stay with a parent on fixed weekdays, others alternate weekends, while some spend longer periods together during school holidays.
CMS considers the overall pattern rather than requiring every week to be identical. Where the relevant statutory conditions are satisfied, the annual total determines the applicable shared-care reduction band.
The main Child Maintenance Calculator UK page provides information about estimating maintenance payments. You can also visit the free child maintenance calculator to explore supported scenarios.
How Does CMS Calculate Overnight Stays?
CMS generally totals the qualifying overnight stays for a year and divides the total by 52. This produces the average nights per week used to identify a shared-care band.
What Counts as a Qualifying Night?
Usually, the child stays overnight with the paying parent at their home or elsewhere, including while on holiday. A night away from both parents can sometimes count if the paying parent remains responsible and would be contacted in an emergency.
Where another person is responsible and would deal with an emergency, that night may not count as the paying parent's overnight shared care. Daytime visits alone do not count.
CMS example: Two nights every fortnight give approximately 52 nights in a 52-week year, equal to an average of one night per week.
CMS Overnight Stays Reduction Table
The following bands apply to qualifying ordinary Reduced, Basic and Basic Plus assessments. The reduction is generally applied to the relevant child's share of the maintenance liability.
| Nights per year | General deduction | Approximate percentage |
|---|---|---|
| 0–51 | None | 0% |
| 52–103 | 1/7 | 14.29% |
| 104–155 | 2/7 | 28.57% |
| 156–174 | 3/7 | 42.86% |
| 175 or more | 50% plus £7 weekly for that child | Special calculation |
In eligible income-based cases, a minimum weekly liability of £7 generally applies after shared-care reductions. Qualifying benefit-based Flat-rate cases follow different rules.
For more about the legal distinctions between shared overnight care and equal day-to-day care, read our Child Maintenance and Shared Care guide.
Free Overnight Stay Counter
Use this simple tool to estimate the total nights in a recurring care schedule and identify the corresponding general CMS band. Only include additional holiday nights that are not already counted in your regular schedule.
Count Your Annual Overnight Stays
Choose your recurring overnight arrangement, then add any additional qualifying nights.
Average: 0 nights per week.
This counter assumes a 52-week recurring schedule. Adjust extra nights to avoid overlaps or cancelled stays. It identifies a general overnight band, not an official CMS assessment.
Once you know the approximate overnight band, visit the main child maintenance calculator to estimate a supported payment using relevant income and family information.
Do Alternating Weekends Count Towards Child Maintenance?
Yes. Alternating weekends can count towards shared care if the child has qualifying overnight stays with the paying parent.
Friday to Sunday Every Other Weekend
If the child arrives on Friday, sleeps with the paying parent on Friday and Saturday nights, and returns on Sunday, that is two overnight stays per alternating weekend.
Alternating Weekend Example
Friday night: 1 night
Saturday night: 1 night
Weekends in 52 weeks: 26
26 × 2 = 52 nights
In a qualifying income-based CMS case, 52 nights reaches the first shared-care band, which generally reduces the relevant maintenance share by one-seventh.
Saturday Night Only, Every Other Weekend
A child who stays only Saturday night on alternating weekends has approximately 26 qualifying nights annually. That alone does not reach the usual 52-night threshold.
Friday evening to Sunday afternoon is normally two nights, not three. Returning the child on Sunday does not add a Sunday overnight stay.
Do School Holidays Count as Overnight Stays?
Qualifying overnight care during school holidays can count towards the yearly total. The stays do not need to happen every week. Christmas, Easter, half-term and summer holidays can all contribute where the paying parent has overnight responsibility.
Six Weeks in Summer and Two Weeks at Christmas
Holiday-Only Arrangement
Summer holidays: 6 × 7 = 42 nights
Christmas holidays: 2 × 7 = 14 nights
Total: 42 + 14 = 56 nights
This example matches the pattern described in GOV.UK's overnight shared-care guidance. In an eligible case, 56 nights generally falls within the first reduction band.
What If Holidays Overlap Regular Weekends?
Do not count the same night twice. If the child already stays every other weekend and some of those weekends fall within a two-week holiday visit, count each qualifying calendar night once.
Practical method: Use a calendar to mark every actual or agreed qualifying overnight stay. Then count the unique dates rather than adding overlapping estimates together.
Common Overnight Stay Arrangements and Annual Totals
Different care schedules can produce similar annual totals. The table shows illustrative recurring arrangements before additional holidays or missed stays.
| Care arrangement | Estimated nights | General CMS band |
|---|---|---|
| One night every other weekend | 26 | No reduction |
| Two nights every other weekend | 52 | 1/7 |
| One night every week | 52 | 1/7 |
| Two nights every week | 104 | 2/7 |
| Three nights every week | 156 | 3/7 |
| Six summer weeks + two Christmas weeks | 56 | 1/7 |
| 52 weekend nights + 20 additional nights | 72 | 1/7 |
These are simplified patterns. Different holiday schedules, leap years, cancelled visits and changes to the arrangement can alter actual totals.
How Do Overnight Stays Change Maintenance Payments?
CMS first establishes a weekly maintenance amount from income and other relevant circumstances. Qualifying shared care can then reduce that amount.
For an ordinary case involving one qualifying child, consider a weekly amount of £84 before any shared-care adjustment.
| Annual nights | Reduction | Illustrative weekly amount |
|---|---|---|
| 0–51 | None | £84.00 |
| 52–103 | £12.00 | £72.00 |
| 104–155 | £24.00 | £60.00 |
| 156–174 | £36.00 | £48.00 |
| 175+ | £42 + £7 | £35.00 |
These figures are examples of the ordinary income-based method, not a guarantee of an actual CMS decision.
If there are two or more children, CMS may apply reductions to their individual shares. Read our CMS Calculation Guide for the overall six-step method.
How Are Overnight Stays Counted for Multiple Children?
Every qualifying child can have a different overnight arrangement. One child might stay two nights each week, while a sibling stays only on alternate weekends.
The appropriate deduction is generally assessed for each child's share of the weekly maintenance amount, rather than automatically applying one band to the whole family.
Example: Two Children
Starting combined maintenance: £140
Initial share: £70 per child
Child 1: 52 nights — reduction of £10
Child 2: 104 nights — reduction of £20
For child-specific rates, see Maintenance for One Child , Maintenance for Two Children and Maintenance for Three Children .
What Happens with 50/50 Overnight Stays?
Equal overnight stays do not automatically eliminate child maintenance. CMS also considers who provides the child's main day-to-day care.
Where parents genuinely provide equal day-to-day care, there may be no maintenance payable for that child. However, approximately half the overnight stays alone does not prove this.
Entering approximately 182 nights into an independent calculator is not enough to determine whether the statutory liability is £0. An official CMS decision may be needed.
What If Parents Disagree About Overnight Nights?
Parents may disagree about the actual care schedule or whether some stays should count as overnight shared care. CMS can request information and consider relevant evidence.
If both parents accept that overnight shared care exists but cannot agree on the number of nights, CMS may use an assumed one-night-per-week arrangement in qualifying circumstances.
Useful Records to Keep
- An agreed parenting calendar showing overnight dates.
- Written messages confirming holiday and weekend stays.
- A relevant court order.
- Records of agreed changes or cancelled overnight stays.
- Other evidence CMS requests.
An agreement or court order may be important evidence, but CMS determines the applicable maintenance calculation using the relevant rules.
When Should You Report Changes to Overnight Stays?
GOV.UK advises notifying CMS when overnight stays start, stop or change sufficiently to affect the average and relevant care band.
For example, an arrangement changing from 140 to 150 nights usually remains in the same band. A change from 150 to 160 nights moves into another band and should be reported.
The timing and effective date of any change depend on the official case and applicable rules. Continue following an existing CMS payment plan until it is changed.
Report a Change on GOV.UK →Do Overnight Stays Affect Flat-Rate Benefit Cases?
In certain qualifying benefit-based Flat-rate assessments, 52 or more agreed overnight stays can reduce maintenance to £0 for the relevant child. Other children in the same receiving household may also be affected.
A Flat rate arising solely from low income of £100 or less is treated differently. Overnight care does not normally reduce that Flat-rate liability.
See our Child Maintenance on Benefits guide for further explanation.
Common Mistakes When Counting Overnight Stays
An incorrect annual night total may lead to a misleading maintenance estimate. Avoid these common counting errors.
- Counting daytime contact as an overnight stay.
- Counting Friday to Sunday as three nights instead of two.
- Counting the same holiday and regular weekend nights twice.
- Assuming every year follows exactly the same calendar.
- Applying one child's overnight band to all siblings.
- Assuming 50/50 nights always mean £0 maintenance.
- Reducing payments without an official CMS decision.
For a wider explanation of child maintenance, visit our Complete Child Maintenance Guide .
Official CMS Sources and Calculation Limitations
The guidance on this page concerns ordinary CMS shared-care rules used in England, Wales and Scotland. Northern Ireland operates a separately administered service.
- GOV.UK — Living Arrangements and Overnight Care
- GOV.UK — Detailed CMS Calculation Guide
- GOV.UK — Maintenance Calculation Overview
- GOV.UK — Official Maintenance Calculator
Independent website: Child Maintenance Calculator UK is not affiliated with GOV.UK, DWP, HMRC or CMS. The night counter and payment examples are illustrative and are not official maintenance decisions.
More information is available in our Calculation Methodology and Disclaimer .