Council Tax Reduction Non-Dependant Deductions Explained

What Is a Non-Dependant Deduction?

A non-dependant is anyone aged 18 or over who lives in your home but is not your partner and is not paying you rent on a commercial basis. Adult children, siblings, elderly relatives and friends all count. When your council works out your Council Tax Reduction (CTR), it assumes each non-dependant contributes towards the bill — even if they actually pay nothing — and takes a fixed weekly amount off your award.

The deduction is based on the non-dependant's gross weekly income, not on what they actually hand over. Under Birmingham City Council's 2026/27 published rates, for example, the tiers run from £5.20 per week for someone earning under £266 to £15.95 per week for someone earning £577 or more. Your own council's figures may differ: every English billing authority sets its own working-age scheme, and some use slightly different income bands or deduction amounts.

When the Deduction Does Not Apply

Some situations remove the non-dependant deduction under the local scheme. Because working-age rules vary by council, check your council's adopted scheme. Common exemptions include cases where you or your partner receive the middle or highest rate of DLA Care Component, the daily living component of PIP, or Attendance Allowance; these benefits can cancel all non-dependant deductions regardless of how many adults live with you or what they earn.

The deduction also does not apply if the non-dependant is:

• Under 18 years old
• A full-time student (including during summer vacation)
• Receiving Pension Credit (Guarantee Credit only)
• In receipt of Income Support, income-based JSA or income-related ESA (where the non-dependant has no earned income above the nil-deduction threshold)
• A member of the armed forces away on operations
• Someone who is themselves severely mentally impaired

If your council is applying a deduction for someone who falls into one of these categories, you have grounds to challenge the decision.

How It Interacts with Your CTR Calculation

In a means-tested scheme, the non-dependant deduction is subtracted after the taper reduction. The council works out your maximum eligible CTR, subtracts the taper (typically 20% of your excess income above the applicable amount), and then subtracts each non-dependant deduction. In an income-banded scheme, the deduction comes off the percentage discount — so if your band entitles you to 75% off and you have one non-dependant deduction, the weekly award drops by the fixed amount.

Multiple non-dependants each generate their own deduction. A household with two working adult children could lose £20–£30 per week from the CTR award before either one pays a penny towards the bill.

What to Do If the Deduction Seems Wrong

Check the decision notice your council sent when it assessed your CTR. It should list each non-dependant, their assumed income band, and the weekly deduction. If the council has the income wrong — perhaps an adult child lost their job or dropped to part-time hours — you need to report the change and supply evidence of their current earnings (or lack of them).

If the council refuses to remove a deduction for someone who should be exempt (a full-time student, for instance), ask for a written review. If the review upholds the deduction and you still disagree, you can appeal to the Valuation Tribunal for England at no cost within two months of the council's response.

The Council Tax Reduction in England guide includes a Decision Notice Review Worksheet that walks you through checking each line of the notice against the scheme rules — including non-dependant deductions.

Practical Steps to Reduce the Impact

If the deduction is correct but the lost CTR is causing hardship, consider whether any of these apply:

• Ask the non-dependant to contribute — the deduction exists because the council assumes they are helping with the bill, and getting an actual contribution can offset the reduction in support
• Check whether the non-dependant qualifies as a carer — if they provide 35 or more hours of care per week to a severely disabled person (not necessarily you), they may qualify for Carer's Allowance, and some councils exempt carers from the deduction
• Apply for discretionary relief under Section 13A(1)(c) if the combined effect of non-dependant deductions and other scheme restrictions is causing exceptional hardship

Councils will not volunteer these options. You have to ask.

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