When parents separate, caring responsibilities are frequently split between two households. Under Regulation 46 of the Child Support Maintenance Calculation Regulations 2012, the law formally recognises the financial burden of providing accommodation, food, and day-to-day essentials during overnight stays.

If the child stays overnight with the paying parent for an average of at least one night per week (52 nights per year), a statutory fraction is deducted from the baseline child maintenance assessment.

The Statutory Overnight Bandings

The regulations divide overnight care into four discrete tiers:

Annual Overnight Stays Typical Schedule Statutory Fraction Discount Effective Saving
0 to 51 nights Daytime contact only 0/7 (Nil) 0%
52 to 103 nights Alternate weekends 1/7th ~14.3% reduction
104 to 155 nights 2 nights per week 2/7ths ~28.6% reduction
156 to 174 nights 3 nights per week 3/7ths ~42.9% reduction
175+ nights Equal shared care (approx. 50/50) 50% plus £7/child/wk deduction >50% reduction

The Special Rule for Equal Shared Care (175+ Nights)

When overnight care reaches or exceeds 175 nights annually (averaging 3.36 nights per week, commonly treated as equal 50/50 care), the statutory formula applies a special two-step reduction:

  1. The baseline child maintenance order is halved (50% reduction).
  2. An additional statutory discount of £7.00 per child per week is deducted from the remaining balance.

    3. Example: Equal Care on a £50,000 Income

    • Paying parent earns £50,000 gross with 1 child.
    • Baseline weekly maintenance: £105.77/week.
    • Step 1 (50% reduction): £52.88/week.
    • Step 2 (Less £7 extra deduction): £45.88 / week.

    Proving Shared Care to the CMS

    In the event of a dispute between parents regarding the actual number of overnight stays:

    • A formal Child Arrangements Order (CAO) from the Family Court serves as definitive statutory evidence.
    • Written parenting agreements or confirmed WhatsApp/calendar schedules are given substantial evidentiary weight.
    • If no agreement or court order exists and parents dispute the overnight count, the CMS applies an assumed minimum 52 nights (1/7th reduction) pending formal resolution.