What is council tax actually based on, and why are the bands so old?
A property tax based on the estimated capital value of a home on 1 April 1991 in England — a valuation date that has never been updated, so the entire system rests on what a property would have sold for more than three decades ago.
How it works. Every domestic property is placed in one of eight bands, A to H, reflecting its 1991 value. The council sets a rate for band D, and the other bands are charged as fixed proportions of it — so band A pays six-ninths of band D and band H pays twice band D, regardless of actual values.
Why that matters: the system is regressive. The ratio between the cheapest and most expensive band is capped at three to one, while actual property values across those bands differ by far more. A home worth twenty times another may pay three times the tax.
Why the bands were never revalued. Revaluation creates losers as well as winners, and the losers are numerous, identifiable and vocal. Wales revalued in 2003; England has not, and planned revaluations have been repeatedly abandoned. The political cost has consistently outweighed the appetite for reform. Scotland retains 1991 values with adjusted multipliers for higher bands.
What follows practically:
New properties are given a 1991 value that never existed, by comparison with similar homes — a genuinely strange exercise.
Improvements do not trigger rebanding while you own the property, but can on sale.
Banding errors exist and are common, dating from the rapid original valuation exercise.
You can challenge your band, and comparing with neighbouring similar properties is the usual evidence. The band can go down or up, and a successful challenge can affect neighbours.
Discounts and exemptions worth knowing: 25% for a single adult occupant; full exemption where all occupants are students; disregards for certain people including carers and those with severe mental impairment — the last of which is significantly under-claimed and can be backdated; and reductions for disability adaptations.
Council tax support exists for those on low incomes and varies by council.
General information, not financial advice.