Deep dive · Updated 08/07/2026

Equal care and regulation 50: the question the CMS must answer first

Equal care and shared care are not the same thing, and confusing them costs parents money and — more fundamentally — can result in a parent being made liable for maintenance when the law says no liability arises at all. This page explains the difference, and why regulation 50 of the Child Support Maintenance Calculation Regulations 2012 operates as a threshold provision that the CMS must work through before it can lawfully treat anyone as the "non-resident parent" and run a calculation.

Equal care vs shared care — the difference that matters

The two concepts sit in different parts of the legislation, ask different questions, and produce different outcomes:

The CMS's own Decision Makers Guide makes the separation explicit: "equal shared care differs to equal day to day care" (DMG Vol 1, Ch 11, note to para 11017, pointing decision-makers to Chapter 5 for day-to-day care). A parent can sit in shared care Band D (175+ nights) and still not have equal day-to-day care; conversely, a parent a night or two short of Band D may nonetheless share day-to-day care equally. Nights are the currency of shared care; responsibility is the currency of regulation 50. Full detail on the bands is in the shared care guide.

Regulation 50 as a threshold provision

Regulation 50 provides, in full effect:

(1) Where the circumstances of a case are that — (a) an application is made by a person with care under section 4 of the 1991 Act; and (b) the person named in that application as the non-resident parent of the qualifying child also provides a home for that child (in a different household from the applicant) and shares the day to day care of that child with the applicant, the case is to be treated as a special case for the purposes of the 1991 Act.

(2) For the purposes of this special case, the person mentioned in paragraph (1)(b) is to be treated as the non-resident parent if, and only if, that person provides day to day care to a lesser extent than the applicant.

(3) Where the applicant is receiving child benefit in respect of the qualifying child the applicant is assumed, in the absence of evidence to the contrary, to be providing day to day care to a greater extent than any other person.

Three consequences follow from that wording:

1. The special case is not optional

   Regulation 50(1) says the case "is to be treated as a special case" where its conditions are met. Once the named parent provides a home for the child in a different household and shares day-to-day care, the special-case machinery is engaged by operation of law — not at the CMS's discretion, and not only if someone asks nicely.

2. "If, and only if" is a condition precedent

   Regulation 50(2) does not say the named parent "may" be treated as the non-resident parent, or that lesser care is one factor among many. It says they are to be treated as the non-resident parent if, and only if, they provide day-to-day care to a lesser extent than the applicant. In a regulation 50 case, a "lesser extent" finding is therefore the legal foundation on which non-resident-parent status — and everything that follows from it: liability, the calculation, fees, enforcement — rests. No finding, no foundation.

3. The sequence is fixed: threshold first, calculation second

   It follows that where the regulation 50(1)(b) circumstances exist, the decision-making order is mandatory: first recognise the special case; second determine, on the evidence, whether the named parent provides day-to-day care to a lesser extent than the applicant; and only then — if the answer is yes — treat them as the non-resident parent and proceed to a statutory calculation under section 11. A calculation issued without the regulation 50(2) question ever being asked, in a case where the threshold facts were before the CMS, puts the cart before the horse: it assumes the very status the regulation requires to be established.

What "day-to-day care" means — the CMS's own manual

"Day-to-day care" has no statutory definition (DMG Vol 1, para 05046) — which is precisely why it is broader than a night count. The Decision Makers Guide directs caseworkers to weigh, among other things (DMG 05048):

• who the child spends most time with when not at school, nursery or childcare;
• who pays for most of the child's clothes and meals;
• who arranges and pays for childcare;
• who is the usual contact for the school or childminder;
• whose GP and dentist the child is registered with, and who arranges and attends appointments;
• who has the greatest involvement in recreational activities and pays for them;
• who already receives financial support for the child (benefits, local authority assistance).

A parent who does the same school runs, cooks the same number of meals, attends the same appointments, supports the same homework and clubs, and differs from the other parent only in where the children sleep on alternate Sunday nights is not, on any fair reading of those factors, providing day-to-day care "to a lesser extent". The factors are about responsibility carried, not beds occupied.

The Child Benefit presumption — and how to displace it

Regulation 50(3) gives the applicant who receives Child Benefit a rebuttable head start: absent contrary evidence, they are assumed to provide day-to-day care to a greater extent. The DMG confirms the mechanics: the onus is on the person challenging the presumption to evidence it (DMG 05049); verbal evidence suffices only if the other parent agrees, otherwise documentary evidence is required (DMG 05050); and the decision-maker must then decide on the balance of probabilities who provides the greater level of care, giving both parties the opportunity to comment on each other's evidence (DMG 05049, 05051).

Documentary evidence the DMG itself lists as capable of displacing the presumption: school, GP and dentist records showing equal contact; written evidence from childcare providers showing equal contact or an equal role in the childcare contract; and bank statements, receipts or contracts showing equal involvement in major spending decisions (DMG 05050). Add to that the practical staples: an agreed rota (however informal), a jointly maintained calendar, and club or activity records naming both parents.

Putting regulation 50 to the CMS in practice

1. Raise it explicitly, in writing, at first contact

   Regulation 50 is rarely applied spontaneously. Say the words: "I provide a home for the children and share their day-to-day care with the applicant. This case falls within regulation 50(1) of the Child Support Maintenance Calculation Regulations 2012 and must be treated as a special case. Under regulation 50(2) I can only be treated as the non-resident parent if I provide day-to-day care to a lesser extent than the applicant — which I do not. I require that determination to be made on the evidence before any liability decision or calculation is issued."

2. Evidence the DMG 05048 factors, point by point

   Structure your evidence around the CMS's own list: schooling, meals, appointments, activities, spending. A one-page table mapping each factor to your evidence is more persuasive than a narrative. Address nights too — equal or near-equal overnights support the picture — but do not let the CMS collapse the question into a night count; that is the shared-care question, not this one.

3. Anticipate the presumption

   Acknowledge that the applicant receives Child Benefit and state plainly that your evidence is submitted as the "evidence to the contrary" that regulation 50(3) contemplates. This forecloses the lazy answer that the presumption settles the matter — a presumption that operates "in the absence of evidence to the contrary" cannot survive the presence of it unexamined.

4. Demand a reasoned decision on the threshold question

   Ask the CMS to state, in its decision letter: whether it accepts the case is a regulation 50 special case; its finding on "lesser extent" and the evidence that finding rests on. Those findings carry full MR and appeal rights.

If the CMS skipped the question

Where you put equal-care evidence before the CMS and a calculation was issued without any regulation 50 determination, you have three converging grounds of challenge: the decision is wrong in law (a condition precedent to non-resident-parent status was never established); it is procedurally unfair (evidence going to the threshold question was ignored without reasons); and it is factually wrong (if your evidence is right, no liability arises). Put all three in the MR, and persist to the tribunal if necessary — the First-tier Tribunal re-decides the case in full, is comfortable with day-to-day-care evidence, and is not bound by the CMS's internal evidence preferences. If the failure caused you to pay maintenance that was never lawfully due, pursue repayment through revision and consider the complaints route for the maladministration alongside.