HMRC Partial Exemption And Input Tax Check: Method And Blocked Claims

A business that makes both taxable supplies (standard, reduced or zero-rated) and exempt supplies is partly exempt for VAT purposes. Input tax directly relating to taxable supplies is generally recoverable, input tax directly relating to exempt supplies is generally not, and input tax on costs used for both, known as residual input tax, must be apportioned using a method.

HMRC checks partial exemption because the calculations involve judgement, an annual adjustment that is easy to miss, and a standard method that does not suit every business, all of which create scope for over-recovery. A check typically starts with a request for the workings behind the residual input tax split for the periods concerned.

The standard partial exemption method apportions residual input tax broadly based on the value of taxable supplies compared with total supplies. Many businesses use this without formal agreement, since it applies by default, but HMRC will still check that it produces a fair and reasonable result and has been applied consistently.

A business can apply to use a special method better suited to its cost structure, but a special method must be agreed with HMRC in writing before it is used; retrospectively applying an unagreed method is a frequent finding in these checks. If your business uses something other than the plain standard method, confirm the agreement is on file and matches what has actually been applied on the returns.

Because partial exemption calculations are normally done provisionally each VAT period, the rules require an annual adjustment to true up the year's figures once full-year data is available, correcting any over- or under-recovery from the provisional calculations. HMRC frequently checks whether this annual adjustment was actually performed and included in the correct return, since it is one of the most commonly missed steps in partial exemption compliance.

HMRC will also check whether the de minimis limits were correctly applied where relevant, since a business whose exempt input tax falls within the de minimis thresholds can treat all of its input tax as recoverable for that year, and getting this test wrong in either direction affects the whole year's recovery position.

Certain categories of input tax cannot be recovered regardless of the business's overall taxable and exempt supply position. The most common blocked categories are VAT on business entertainment provided to non-employees, VAT on the purchase of most cars unless used exclusively for a qualifying business purpose such as taxis or driving instruction, and VAT relating to non-business use of costs.

HMRC checks often find input tax claimed on client entertainment or a car purchase where the exclusive business use condition was not actually met. These are strict, categorical rules rather than matters of apportionment, so the usual defence is evidence of how the item was actually used, not an argument based on partial business benefit.

HMRC typically wants the method calculation for each period under review, invoices for significant residual costs, evidence supporting how exempt and taxable supplies were valued, and confirmation of the annual adjustment calculation. For blocked input tax queries, evidence of the actual use of the item, such as a vehicle's insurance and usage records, is usually more persuasive than a general statement of intended use.

Keep a clear working paper trail showing how the method was applied consistently period by period, since inconsistent application, even where the underlying method is acceptable, is itself something HMRC will query.

Where HMRC concludes that input tax has been over-claimed, whether through an incorrect method, a missed annual adjustment or a blocked category error, it can raise an assessment for the excess together with interest. A behaviour-based penalty may follow depending on whether the error was careless or deliberate and whether it was disclosed before or after HMRC's intervention.

If you disagree with HMRC's view of the method or the treatment of a specific cost, the decision should carry review and appeal rights, generally within 30 days, and a proposal to agree a different method going forward can sometimes be discussed alongside resolving the historic position.