Dorset Council Tax Reduction: Change of Circumstances and the 21-Day Rule

The 21-Day Reporting Duty

Under Section 58.0 of Dorset Council's Council Tax Reduction Scheme, you must report any change in circumstances that could affect your award within 21 days of it happening. This isn't a suggestion — it's a legal obligation that applies to every CTR claimant.

Miss the window and Dorset Council can recalculate your award retrospectively, adding the excess discount back onto your bill as increased liability.

What You Must Report

Four categories of change trigger the duty:

Income changes. Pay rises or drops, new or ended employment, changes to self-employed earnings, revised benefit awards, or new tax credit decisions. This includes changes to your Universal Credit — even though the DWP sends automated updates to councils, system delays mean the council may not receive the information in time. Reporting to the DWP doesn't discharge your obligation to Dorset Council.

Capital changes. If your savings, investments, or bank balances cross the £6,000 threshold — in either direction — that needs reporting. An inheritance, a redundancy payout, or selling a vehicle could all push you over.

Household changes. Someone moves in or out, a child turns 18 (becoming a potential non-dependant), a new baby, or a partner joins or leaves the household.

Address changes. Moving within Dorset, moving out of the Dorset Council area entirely, or changing which property is your main home.

How to Report

Use the change-reporting portal on dorsetcouncil.gov.uk. Log into your council tax account and submit the change through the dedicated form. Keep the portal confirmation receipt number — it's your proof of timely reporting if there's ever a dispute.

What Happens When Income Changes Under the Banded Scheme

Dorset's income-banded structure has a built-in buffer. If your income fluctuates but stays within your current band's boundaries, nothing changes — same discount, same bill, no recalculation. A rebill only triggers when your income crosses a band threshold.

For a single person, Band 3 runs from £135.01 to £171 per week. If your income moves from £145 to £165, you stay in Band 3 at 60% and your bill doesn't change. But if it rises to £175, you've crossed into Band 4 (40%), and the council recalculates.

Over-Award Recovery

Council Tax Reduction is classified as a discount, not a benefit payment. If Dorset Council discovers an unreported change resulted in too much discount being applied, they cancel the excess and add the difference to your council tax balance. A revised bill is issued, and the increased debt gets spread across your remaining monthly instalments.

There's no separate overpayment recovery process like Housing Benefit — the money simply appears as extra council tax owed.

For the full change-reporting checklist and the income band thresholds, see the Dorset Council Tax Reduction guide.

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