How Is Rateable Value Calculated for UK Businesses?

A higher Rateable Value can mean thousands of pounds leaving your business each year before you have paid a supplier, member of staff or energy bill. So, how is rateable value calculated, and how can you tell whether the figure attached to your premises is fair? The short answer is that it is an estimate of rental value, not a direct measure of your turnover or your ability to pay. The detail is where expensive mistakes can happen.

How is rateable value calculated?

For most commercial properties in England and Wales, the Valuation Office Agency (VOA) sets a Rateable Value by estimating the annual rent the property could reasonably have achieved on a specific valuation date. This is often called the Antecedent Valuation Date, or AVD.

It is not necessarily the rent you pay today. It is a statutory valuation based on evidence from the rental market at that historic date, with assumptions about the property’s physical state, its use and the terms on which it could be let.

The current 2023 Rating List in England and Wales is based on rental values at 1 April 2021. That time lag matters. A property may have become harder to let, lost trade or been affected by building works since then, but those changes do not automatically alter the original valuation. Some may instead form the basis for a separate challenge or relief claim, depending on the circumstances.

Scotland has its own rating system and procedures, with assessors rather than the VOA responsible for valuations. The central principle is similar: the valuation reflects an estimate of the property’s annual rental value at the relevant valuation date. The evidence, rules and appeal route can differ, so businesses with sites in more than one nation should not assume one approach applies everywhere.

Rateable Value is not your business rates bill

This distinction catches many occupiers out. Your Rateable Value is the starting point used to calculate your rates bill. Your local authority then applies the relevant business rates multiplier and takes account of any reliefs, exemptions or transitional arrangements.

In simple terms, the calculation is:

Rateable Value x business rates multiplier = gross rates liability

From there, reliefs can reduce what you actually pay. Small Business Rates Relief, retail, hospitality and leisure relief, charitable relief, empty property relief and other schemes may all be relevant. Availability and eligibility vary, so a lower bill does not always mean the Rateable Value is correct, and a high Rateable Value does not always mean you are paying the final amount shown by that basic calculation.

Still, an inflated Rateable Value can affect your liability year after year. That is why it deserves attention. Reliefs can be temporary or limited. Correcting an inaccurate valuation addresses the underlying figure.

What evidence does the VOA use?

The valuation method depends on the type of property and the information available. For a standard shop, office, warehouse or industrial unit, rental evidence is usually the starting point. The VOA will review rents paid for comparable properties and adjust them to reflect meaningful differences.

Those differences can include location, floor area, layout, access, condition, parking, loading facilities, frontage, ceiling height and the quality of the surrounding commercial environment. A bright, well-configured unit on a busy high street is not directly comparable with an awkward unit behind it, even if the square footage looks similar on paper.

The VOA may also apply different values to different areas within a property. Ground-floor retail space can carry a higher rate per square metre than basement, storage or upper-floor accommodation. In offices, a reception area, open-plan workspace, storage room and parking spaces may each need to be treated differently.

This is one reason a valuation cannot be properly assessed by looking only at a postcode, an online estimate or the bill from a neighbouring business.

Rental comparison for common commercial premises

Rental comparison is the most familiar method. It is commonly used for shops, offices, warehouses, factories, salons, surgeries and similar properties where there is enough open-market rental evidence.

A valuer will analyse actual transactions, strip out unusual lease terms where appropriate and compare the subject property against genuinely similar premises. The crucial word is genuinely. A rent agreed for a newly refurbished unit with incentives, superior access and a long lease may not support the same Rateable Value for an older, constrained property nearby.

Receipts and expenditure for trade-based properties

For pubs, hotels, leisure venues and some other specialist trading properties, rental evidence may be limited. In those cases, a receipts and expenditure approach can be used.

This method looks at the property’s fair maintainable trade, deducts reasonable operating costs and considers the amount that could be available as rent. It does not simply rate a business on its actual takings. The exercise involves assumptions about the reasonably efficient operator, the property’s potential and market conditions at the valuation date.

That leaves room for dispute where a property has trading restrictions, poor visibility, limited customer parking, seasonal demand or local competition that has not been properly reflected.

Contractor’s basis for specialist buildings

Some properties are so specialised that there are few, if any, comparable rents. Examples may include certain factories, utilities, schools or large-purpose-built facilities. The contractor’s basis can then be used.

Put simply, it estimates the cost of rebuilding the property, adjusts for age and obsolescence, and converts that capital value into an annual rental equivalent. It is technical work, and small errors in measurement, specification or allowances can have a material impact on the final figure.

Why Rateable Values can be wrong

The VOA works with a vast amount of property data. It is not unusual for a valuation to contain assumptions that do not match the premises as occupied. The issue may be a straightforward factual error, such as an incorrect floor area, omitted access restriction or inaccurate description of the property. It may also be a more technical valuation issue, where the wrong tone of rental evidence or an unsuitable method has been used.

Common pressure points include shops affected by reduced footfall or nearby roadworks, offices with poor natural light or dated layouts, warehouses with limited loading access, and industrial units where part of the space is low-quality storage rather than usable production area. A dental surgery or other professional practice may have unusual layout constraints that make conventional office comparisons unreliable.

A change in the local area can matter too. Major construction, loss of parking, restricted access, persistent flooding or changes to the physical surroundings may affect value. Whether it can reduce your liability, and from what date, depends on the facts and the applicable rules. This is where treating every case as the same is a costly mistake.

Signs your valuation deserves a closer look

You do not need to become a rating expert to spot a potential problem. Start by checking the basic property information used for your assessment. Is the floor area right? Is the description accurate? Does it include areas you do not occupy, or value space as higher-quality accommodation than it really is?

Then compare your premises with local properties carefully. A higher Rateable Value than a neighbour is not proof of an error, because lease dates, size, use, fit-out and location may differ. But it is a sensible reason to investigate, especially where comparable units have similar characteristics.

You should also act if you have received an unexpected rates increase, moved into a property with known defects, experienced a material change affecting the premises, or simply never checked whether the valuation was defensible. Waiting can limit the period for which a reduction or overpayment rebate may be available.

What to do if you think you are paying too much

Gather your rates bill, lease, floor plans and any details that show how the property differs from the VOA description. Photographs, evidence of access issues, correspondence about building works and details of relevant local changes can all help build a clear picture.

But do not submit a challenge based only on the fact that your bill feels high. A successful case needs relevant property evidence and a valuation argument that stands up to scrutiny. In England, the process generally involves checking the facts, challenging the valuation and, where necessary, appealing. Other UK nations follow their own routes and deadlines.

For busy owners and finance teams, that is exactly why specialist representation can make sense. A qualified surveyor can test the valuation approach, identify usable evidence and manage the process without taking your attention away from running the business. Your Local Business Rates Saver offers a free initial eligibility review, so you can establish whether savings may be available before committing to a full case.

Your rates bill is not a figure to accept blindly. If the property details, local evidence or condition of your premises raise questions, get them checked while there is still time to protect your cash flow and pursue any reduction you are entitled to.