How much are UK small businesses really overpaying on business rates?

If you run a shop, café, gym or office in England, your business ratesThe tax most non-residential properties in England pay to their local council, similar to council tax but for shops, offices, warehouses and other business premises. bill is built on one number: your property's Rateable Value (RV)The official estimate of a property's annual rental value on a fixed valuation date. Your rates bill is based on this figure, not on what you actually pay in rent., set by the Valuation Office AgencyThe government body that sets every property's Rateable Value. From April 2026 the VOA is part of HMRC (see below), but 'VOA' is still the common name for the valuation side of the work. (VOA — now part of HMRCHis Majesty's Revenue and Customs — the UK tax authority. Since 1 April 2026 it also includes the VOA's valuation function.). It's meant to reflect what your property would rent for. In practice, it's often an estimate based on assumptions and historic data, not a physical inspection of your unit. That gap between estimate and reality is where overpayment creeps in — and it's more common than most business owners realise.

The system runs on assumptions, not inspections

It isn't practical for the VOA to visit every commercial property in England before setting a Rateable Value. Instead, valuers group similar properties together — same type of business, similar location — and apply a standard rate per square metre, with retail units valued zone by zone (the front of the shop, "Zone AIn shops, the first 6.1 metres of depth from the shop front — the most valuable trading space, and the benchmark rate (£ per m²) used to value the whole unit.", is worth more per square metre than the space behind it). That's a sensible shortcut at national scale, but it means two nearly identical shops on the same street can end up with noticeably different rates, simply because one was grouped or measured slightly differently. Neither the VOA nor your local council will flag this for you — the system relies on you noticing and challenging it yourself.

The government's own numbers show the scale of it

Each year, the government sets aside an estimated £1.5 billion for business rates rebates — money set aside specifically because ratepayers are expected to be found to be overpaying and entitled to money back. That's not a marginal rounding error; it's a standing acknowledgement that a meaningful share of bills don't match what properties should actually be paying.

Most businesses never check — and the ones who do face a slow, technical process

Challenging your Rateable Value goes through three stages: CheckThe three-stage official process for disputing your Rateable Value: 'Check' the facts held about your property, 'Challenge' the valuation with evidence, then 'Appeal' to an independent tribunal if it's still unresolved. (confirm the facts held about your property), Challenge (submit evidence for a lower value), and Appeal (an independent tribunal, if it's still unresolved). Official statistics for the first twelve months of the current rating list show how few challenges actually get resolved quickly:

• 63,100 Checks were registered in the first year — but only 7,810 (around 12%) progressed to an actual Challenge.
• Of those Challenges, only 990 (12.6%) were resolved within the year, while nearly as many — 890 (11.4%) — were struck out as "incomplete" rather than assessed on the merits.
• Looking at the previous rating list, even seven-plus years after it started, 12% of Challenges were still unresolved and a further 11.8% had been struck out.

In other words: the process rewards businesses that build a properly evidenced case from the start, and quietly filters out the ones that don't. That's a structural reason genuine overpayment can sit unclaimed for years — not because the case wasn't there, but because the paperwork wasn't strong enough to survive the first hurdle.

Why the timing matters right now

The 2026 revaluationThe periodic exercise where the VOA updates every property's Rateable Value to reflect current rents. The most recent revaluation took effect 1 April 2026. reset every property's Rateable Value from 1 April 2026, using rental evidence from April 2024. For this list, the government has set a six-month window to lodge a Challenge from the point a Check is accepted, dropping to three months after that. Miss it, and you may have to wait until the next revaluation cycle to correct an inflated valuation — while continuing to pay the higher bill in the meantime.

The upside: if a challenge succeeds, the lower valuation is backdatedIf a challenge succeeds, the lower Rateable Value is usually applied from when the list started (or when the issue arose), so you can reclaim the difference for the period already paid. to the start of the list, not just applied going forward — so a successful case can mean a refund for the period you've already overpaid, on top of a lower bill from here on.

What this means for you

You don't need to take our word — or anyone else's — for whether your rates look right. The fastest first step is comparing your rate per square metre to similar, nearby properties valued on the same basis. That comparison is exactly what Business Rate Checker does automatically: pop in your postcode, and we'll show you how your property stacks up against comparable premises nearby, free, in about two minutes.