Council Tax Single Person Discount — Adult Child Living at Home

The Birthday That Changes Everything

Children under 18 do not count at all for council tax. They are invisible to the system — not even disregarded, just not included. If you are a single parent with children under 18, you qualify for the 25% single person discount.

The day your child turns 18, they become an adult resident under Section 6(5) of the Local Government Finance Act 1992. Unless they qualify for a statutory disregard, the household now has two countable adults, and your single person discount disappears.

When Your Adult Child Is Disregarded

Your child turning 18 does not automatically mean losing the discount. If they fall into one of these categories, they are disregarded and you keep the 25%:

Full-Time Student

Enrolled on a course lasting at least one academic or calendar year, requiring at least 21 hours of study per week across at least 24 weeks. University students, full-time college students, and students on sandwich courses all qualify. The university or college must issue an official Student Certificate — send it to the council.

Students remain disregarded during vacation periods. They do not lose the disregard over summer.

School Leaver or Under-20 in Education

If your child is aged 18 or 19 and still in non-advanced education — sixth form, college A-levels, BTECs requiring at least 12 hours of daytime study per week — they are disregarded. School leavers who finish between 30 April and 1 November remain disregarded until 1 November after the course ends.

This is the safety net for the gap between finishing sixth form and starting university.

Apprentice

An apprentice earning no more than £195 per week gross in 2026/27, undertaking a programme leading to an accredited qualification. If your child starts an apprenticeship on a low wage, they are disregarded. If their pay rises above the threshold, they become a countable adult.

Severe Mental Impairment

If your adult child has a condition causing permanent severe impairment of intelligence and social functioning, certified by a doctor, and they receive a qualifying benefit (PIP Daily Living, Attendance Allowance, DLA Middle or Higher Care, Universal Credit LCWRA element, or Employment and Support Allowance), they are disregarded.

When Your Adult Child Counts

An adult child counts as a full resident if they are:

• Working (not as an apprentice under the threshold)
• Unemployed and not in education
• In part-time education (under the 21-hour or 12-hour thresholds)
• An apprentice earning above £195/week

In these cases, the household has two countable adults and no single person discount applies.

The Gap Year Problem

A common trigger: your child finishes A-levels in June, turns 18 in August, and takes a gap year before starting university in September the following year. From 1 November after their course ends, they lose the school leaver disregard. Between November and the following September, they are a countable adult.

If they are travelling during the gap year, consider whether your home remains their sole or main residence. If they establish a main residence elsewhere (e.g., a long-term stay abroad), they may not count — but this is a factual assessment, and the bar for shifting main residence is high.

For most families, the gap year months mean losing the single person discount temporarily. Budget for the difference and reclaim the discount when they start their degree.

What About Adult Children Who Work and Pay Rent?

An adult child who works full-time and pays you rent is a countable adult. Some parents wonder whether this makes the child a lodger or licensee who might not count — but it does not change their status. A person paying rent to a parent in the same dwelling is still a resident. The single person discount is lost.

The only question is whether they might qualify for a disregard in their own right (student, apprentice, SMI, carer providing 35+ hours to someone in the household who receives a qualifying benefit).

Reporting the Change

When your child turns 18, the council's records may not update automatically. If they qualify for a disregard, send the evidence (student certificate, apprenticeship agreement) proactively. If they do not qualify and you have been receiving the single person discount, you must report the change within 21 days under Regulation 16 of SI 1992/613 — or risk a £70 penalty.

The England Single Person Discount guide includes a disregard audit worksheet that maps every household member to their category, plus a timeline for handling the transitions at 18 and after education ends.

See more England guides →