Your council can reduce this bill to nothing. Almost nobody is told that.

Because a percentage of your refund is a fee for work that has already been done by Parliament. The claim is free to make, the form is published by your council, the doctor’s certificate is free, and the entitlement existed whether or not anyone helped you find it. The going rate in this trade is a quarter to two-fifths of whatever comes back — so on a backdated award of four thousand pounds, somewhere between a thousand and sixteen hundred pounds for a letter and two phone calls. We charge £120 and we take 0% of the refund, whatever its size. There is a second reason, less flattering to us: a contingency fee gives the adviser an interest in the largest possible claim rather than the correct one, and on backdating that is exactly the wrong incentive. A fixed fee means that when we tell you the honest answer is six years rather than fourteen, you can believe us.

Probably not, and it is worth saying so politely and in writing. There is no statutory time limit on backdating a discount, exemption or disabled band reduction. Entitlement arises by operation of law the moment the conditions are met — the application is how the council finds out, not how the right comes into existence. The six-year figure is borrowed by analogy from the general limitation period, and the Valuation Tribunal has held that where it applies at all it runs from the date you knew you had a claim, not from each year you overpaid; one award on that basis ran back to 2003. Councils also have a positive duty to take reasonable steps to find out whether a discount applies, and a tribunal has found that duty unmet where a council never told the taxpayer the disregard existed. The genuine hard limit is a different one: for a cognitive impairment discount the High Court has held it runs from the date the qualifying benefit came into payment, not from diagnosis or first symptoms. So the honest position is that backdating is often much longer than six years, that it has to be argued rather than granted, and that the tribunal — which is free — is where the argument gets settled. What does not work this way is Council Tax Reduction, which is three months at pension age and whatever the local scheme says below it.

Maybe, and this is the one question on the page where we would rather talk you out of it than into it. The upside is real: about a fifth of formal proposals in England produce a lower band, informal reviews do better still, and a reduction backdates to when you moved in or to 1 April 1993 if that is later, so the refund can be very large. The problem is the mechanism. You cannot ask for your band to be lowered. You can only ask for it to be revalued, and the Valuation Office is then obliged to put it in the correct band, which may be a higher one. Its own guidance lists your challenge as the first of four routes to an increase — and the second is a neighbour’s challenge, which can raise yours with no action from you at all. Increases are rare, well under one in a hundred of resolved proposals, and they are not backdated. But the neighbour effect is not captured in any published statistic, and a street where one person challenges and everybody’s band goes up is a documented outcome. If you are in band A there is nothing below you and you should simply not do it. Otherwise: check the free VOA comparables first, and only proceed if five genuinely similar properties nearby sit in a lower band.

It is one subsection of the Local Government Finance Act 1992, and it says a billing authority may reduce a council tax bill to such extent as it thinks fit. That includes to nothing. There is no list of qualifying circumstances, no means test written into it, no requirement that you be in arrears, and no statutory cash limit. It has been used for fire and flood, terminal illness, domestic abuse, care leavers, foster carers, and simply for people whose circumstances do not fit any other box. Three things make it useful rather than theoretical. Each application must be considered on its own merits, so a blanket policy of refusal is unlawful. “We have no budget for this” is not a lawful reason to refuse, because the power is not cash-limited by statute. And a refusal — or two months of silence — can be appealed to the Valuation Tribunal, free. The reason nobody has heard of it is that the whole cost falls on the council’s own collection fund, so there is no incentive whatsoever to advertise it. Freedom of information work has turned up authorities that rejected every single application over a three-year period, which is very hard to square with considering each on its merits.

Possibly two things at once, and most families claim neither. The first is the disregard for severe cognitive impairment — renamed from “severe mental impairment”, which was long overdue. It needs two things: a certificate from a registered doctor, usually the GP, who cannot charge you for it, confirming a permanent severe impairment of intelligence and social functioning; and entitlement to a qualifying benefit, most often Attendance Allowance, the daily living component of PIP, or the middle or higher rate care component of DLA. Once granted, your mother is not counted as a resident at all. If she lives alone that makes the property exempt outright. If she lives with one other adult, that adult is now the only countable resident and the bill drops by 25%. The second is the carer disregard, which can apply to you: thirty-five hours a week or more, living in the same property, caring for someone on a qualifying disability benefit, and not their spouse or, if they are a child, their parent. If both apply and there are only the two of you, every resident is disregarded and you are looking at a 50% discount — or a full exemption if she is the only resident who counts at all. Then ask, in the same letter, for it to be backdated to when the benefit started.

It should be, and you will have to ask — nobody is going to do it for you. From roughly 2020 the Valuation Office was systematically splitting shared houses into separate band A dwellings, one per bedroom, frequently backdated, and in a good many cases the resulting bills landed on individual tenants. Regulations in force from 1 December 2023 ended the practice: a house in multiple occupation is a single dwelling with a single band, and the owner is the liable person for it. The catch is that the change was not applied retrospectively to properties already split, and there was no systematic review of the existing stock. The route is a formal proposal to the Valuation Office to merge the entries, citing the 2023 regulations and the definition of an HMO in the Housing Act 2004, with an appeal to the Valuation Tribunal if it is refused. Two honest caveats. Genuinely self-contained units — own kitchen, own bathroom, own entrance — can still be banded separately and probably should be. And aggregation is a mixed blessing: one band instead of six is a much smaller bill, but it lands on you rather than on your tenants, and you lose the per-room student exemptions unless every occupier is a student. We charge £595 for the proposal and the evidence, and we will tell you before you instruct us whether the arithmetic favours you.

It may be lawful and still be avoidable, and there are two separate things to attack. The first is the mandatory exception for a dwelling undergoing or requiring major repair work or structural alteration, which excepts it from the empty homes premium for twelve months. Mandatory means what it says — the council has no discretion to refuse one that applies. The second is the discretionary local discount for a property that is unoccupied and undergoing major repairs, which can run up to twelve months but which every council sets for itself and which a great many now set at nil. Two traps to know about. The premium clock attaches to the property rather than to you, so if you bought it empty you inherited whatever had already accrued, and a spell of occupation of six weeks or less does not reset it. And if the renovation is stalled rather than proceeding, consider whether the property is genuinely better placed under the exception for one being actively marketed for sale, which also runs twelve months. Beyond those, section 13A is available to anyone, for any reason, including this one.

Yes, and it matters. An appeal does not suspend liability, and stopping payment while you dispute a band or a discount is the fastest way to turn a winnable argument into a liability order and a set of costs. Keep the instalments going, win the point, and take the refund. There is a related change worth knowing about if you are already behind: from April 2027 councils must wait sixty-three days — three missed instalments — before demanding the whole year’s balance, rather than the twenty-one days that applies now, and the costs a court can add on a liability order are being capped at £100. Default instalments also move from ten months to twelve. None of that helps today, which is why the advice today is to pay and argue rather than to argue instead of paying.

The checker is free and so is everything it tells you to do. If a route is open and obvious — a single person discount, a student exemption — we will say so and you should do it yourself in ten minutes; taking money for that would be indefensible. Where we charge, it is £120 for a claim prepared, submitted and argued, including the backdating argument, which is the part people lose on their own. A band challenge is £250 and includes assembling the comparable evidence and an honest view beforehand on whether to do it at all. A refusal taken to the Valuation Tribunal is £450 — the tribunal itself is free, so that fee is entirely preparation and representation. For landlords, a portfolio audit is £35 a property and an HMO re-aggregation proposal is £595. All fixed, all quoted before anything starts, and 0% of whatever comes back to you. If you signed something with somebody else at your door or over the phone, check the date — distance and off-premises contracts carry a fourteen-day cancellation right, and that period extends by up to a year if they never told you it existed.