Are under-18s counted for Council Tax?
Anyone under the age of 18 is not counted as an adult for Council Tax, regardless of whether they work or study. This means a home where the only other residents are under 18 can qualify for the single adult discount. The council applies this automatically once it knows the household ages.
See everything you may qualify for — benefits, grants, reductions and reliefs — in about 3 minutes. Free to check.
Check what you're owed →Council Tax is built around the number of adults in a property, and adulthood for this purpose starts at 18. A person under that age is simply not part of the count, so a single parent or any sole adult living only with under-18s is treated as living alone for discount purposes.
This matters most around birthdays. When a young person turns 18 they normally start to count, which can remove a discount, although other rules may keep them disregarded for a while, such as if they remain at school or have just left and are still under 20.
Because the rule depends on the council knowing your household, it is worth making sure your details are correct so the right discount is applied. When a child approaches 18, check whether a school leaver or other disregard keeps the discount running, and review your wider entitlement.
How the under-18 rule affects your discount
- List the adults. Identify everyone aged 18 or over, since only they count for Council Tax.
- Apply for the discount. If you are the only counted adult, claim the single person discount from your council.
- Watch for 18th birthdays. As a child nears 18, check whether a school leaver disregard keeps the discount.
- Update the council. Tell the council when household ages change so the correct charge applies.
Frequently asked questions
- Do under-18s ever count for Council Tax?
- No. Anyone under 18 is not counted as an adult, whether or not they work or study, so they do not add to the adult total.
- What happens at 18?
- They normally start to count, which can end a discount, unless another disregard applies, such as for some young people still at or recently leaving school.
- Can a sole adult with teenagers get a discount?
- Yes. If the only other residents are under 18, the single adult is treated as living alone and can claim the single adult discount.
- Do I need to tell the council their ages?
- It helps. Make sure your household details are correct so the right discount is applied and review it as children approach 18.
MoneyFinder is an independent sign-posting service that helps you find financial support you may be entitled to. We are not a government body and do not provide financial advice. Figures are taken from the official sources cited above and were correct when last checked — always confirm current details on the linked GOV.UK pages.