Cornwall Council Tax Reduction Change of Circumstances

The 21-Day Reporting Rule

Once you're receiving Council Tax Support from Cornwall Council, you have a legal duty to report any change in your circumstances within 21 days of the change happening. This is separate from anything you report to the DWP, HMRC, or Jobcentre Plus. Telling Universal Credit about a new job does not tell Cornwall Council.

What You Must Report

The changes that affect your Council Tax Support include:

Income changes — starting a new job, losing a job, a pay rise, a pay cut, self-employed profits going up or down, or any change to your benefit payments.

Savings and capital — your combined household bank balances crossing the £6,000 threshold in either direction. A redundancy payment, inheritance, or insurance payout that pushes you over means your award stops immediately. When the balance drops back to £6,000 or less, you need to reapply (but support won't be backdated).

Household changes — a partner moving in or out, the birth of a child, an adult child moving back home, or any non-dependant joining or leaving the property. A non-dependant's income or work hours changing also counts, because it affects the deduction taken from your award.

Absences from the property — if you expect to be away for more than four weeks (or eight weeks for hospital stays or medical treatment).

How to Report

The quickest way is through your Self-Service account on cornwall.gov.uk. You can also call the Benefits Advice Line on 0300 1234 121 or send written notice. Keep a record of the date and method — if there's ever a dispute about when you reported, a timestamp from the online portal or a note of the phone call protects you.

What Happens If You Report Late

If a late report means Cornwall Council overpaid your Council Tax Support, the overpayment is classified as Excess Council Tax Reduction. The council recalculates your account retrospectively, cancels the unearned discount, and issues a revised demand notice. The extra amount becomes standard council tax arrears, collected through the normal billing process — not through benefit deduction rules like Housing Benefit overpayments.

If the revised notice creates hardship, you can ask the council to spread the remaining balance over 12 monthly instalments instead of 10, or apply for Exceptional Relief if you genuinely can't pay.

Changes That Help You

Not every change is bad news. If your income drops, a non-dependant moves out, or you lose a partner's income, report it within 21 days so the council can recalculate your award using the changed circumstances. Report early.

The Cornwall Council Tax Reduction guide includes a change-of-circumstances log template so you can track exactly what you reported, when, and how.

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