What Is Partial Exemption for a Multi-Site Dental Group?

If you run a multi-site dental group in the UK, VAT is rarely straightforward. Most dental treatment is exempt from VAT under Schedule 9, Group 7 of the VAT Act 1994 [1]. But your group also buys goods and services that carry VAT, chairs, compressors, X-ray equipment, lab fees, rent, utilities, professional fees. When you make both exempt supplies (dental treatment) and taxable supplies (cosmetic treatments, retail sales of dental products), you enter the territory of partial exemption.

Partial exemption means you can only recover the VAT on costs that relate to your taxable supplies. The VAT on costs that relate to exempt supplies is irrecoverable. For a multi-site group with a mixed NHS/private income split, the calculation can become complex quickly. A group with 15% NHS and 85% private income, for example, will have a different recovery position than one with a 50/50 split [2].

This article explains the core rules, the cost sharing exemption, and the practical steps a multi-site dental group should take to stay compliant and avoid a surprise VAT bill.

When Does a Dental Group Need to Register for VAT?

The VAT registration threshold is £90,000 of taxable turnover in a rolling 12-month period [1]. For a dental group, "taxable turnover" means the value of supplies that are not exempt. Exempt dental treatment, whether NHS or private, does not count towards the £90,000 threshold. Only your standard-rated or zero-rated supplies count.

Common examples of taxable supplies in a dental group include:

  • Purely cosmetic treatments without a medical purpose (tooth whitening is a known borderline case HMRC scrutinises)
  • Retail sales of toothbrushes, toothpaste, mouthwash, and other dental products
  • Dental laboratory services supplied to third parties
  • Rental income from sub-letting surgeries to associates (if structured as a taxable supply)

If your group's taxable turnover exceeds £90,000, you must register for VAT. But because most of your income is exempt, you will be a partially exempt business. That means you cannot recover all the VAT on your costs.

How Partial Exemption Works for a Dental Group

Under the partial exemption rules, you calculate how much input VAT you can recover using a standard method or a special method agreed with HMRC. The standard method uses the proportion of taxable supplies to total supplies.

For a multi-site dental group with a turnover of £2,100,000 and an 85% private / 15% NHS split, the calculation might look like this [2]:

  • Total supplies: £2,100,000
  • Exempt supplies (dental treatment): £1,785,000 (85%)
  • Taxable supplies (cosmetics, retail, etc.): £315,000 (15%)
  • Recovery percentage: 15%

If the group incurs £200,000 of input VAT in a quarter, it can recover only £30,000 (15%). The remaining £170,000 is irrecoverable and becomes a real cost to the business. That is why getting the partial exemption calculation right, and considering a special method, matters so much for a multi-site group.

There is a de minimis rule. If your total input VAT is below £625 per month on average and your exempt input VAT is below £625 per month, you can recover all of it. But for most multi-site groups with significant overheads, the de minimis threshold is too low to help.

Cost Sharing Exemption: Can a Multi-Site Group Use It?

The cost sharing exemption (CSE) under Article 132(1)(f) of the EU VAT Directive is implemented in UK law. It allows groups of exempt businesses to share costs without triggering a VAT charge on the recharged costs. The idea is that a cost sharing group (CSG) can provide services to its members at cost, and those supplies are exempt from VAT.

For a multi-site dental group, the CSE could apply if you set up a separate entity that provides shared services, such as centralised billing, HR, IT support, marketing, or procurement, to the individual practice sites. The key conditions are:

  • The CSG must be a separate legal entity (typically a company or LLP)
  • All members must be carrying on exempt or non-taxable activities
  • The CSG's services must be directly necessary for the members' exempt activities
  • The CSG must only recharge the exact cost of the services (no profit margin)
  • The CSG must not distort competition

If these conditions are met, the recharges from the CSG to the practice sites are exempt from VAT. That means the practice sites do not have to pay VAT on the recharged costs, and the CSG does not have to charge VAT. This can save a multi-site group a significant amount of irrecoverable VAT.

However, HMRC scrutinises cost sharing arrangements closely. The exemption is not automatic. You need to document the arrangement properly and ensure the CSG is genuinely operating at cost. A poorly structured CSG can result in HMRC assessing VAT on the recharges, plus interest and penalties.

Practical Steps for a Multi-Site Dental Group

If you operate a multi-site dental group, here are the practical steps to take:

1. Map your income streams. Identify every source of income across all sites. Separate exempt dental treatment from taxable supplies. Include associate rent, lab fees, retail sales, and cosmetic treatments. This mapping is the foundation of your partial exemption calculation.

2. Review your cost base. List all costs that carry VAT. Group them into three categories: costs used wholly for taxable supplies (fully recoverable), costs used wholly for exempt supplies (irrecoverable), and costs used for both (partially recoverable). Common "both" costs include rent, utilities, professional fees, and marketing.

3. Consider a special method. If the standard method produces an unfair result, for example, if your taxable supplies are a small proportion of total supplies but your taxable activities use a disproportionate share of overheads, you can apply to HMRC for a special method. A special method might use floor space, headcount, or direct attribution to allocate input VAT more fairly.

4. Evaluate a cost sharing group. If your group has three or more practice sites and significant shared costs, a CSG could save tens of thousands of pounds per year in irrecoverable VAT. But the setup costs and ongoing compliance burden are real. Work with a dental-specialist accountant to model the numbers before committing.

5. Keep clear records. HMRC can request a partial exemption calculation for any VAT period. If you cannot demonstrate how you arrived at the recovery percentage, HMRC may disallow the recovery and issue an assessment. For a multi-site group, the records should be centralised and auditable.

Common Pitfalls for Multi-Site Dental Groups

Several issues arise repeatedly when we review multi-site dental group VAT positions:

  • Treating all private income as exempt. Not all private dental work is exempt. Cosmetic treatments without a medical purpose can be standard-rated. Tooth whitening is a known borderline case. HMRC looks at the medical purpose, not just whether the treatment is NHS or private [1].
  • Ignoring associate rent. If you sub-let surgeries to associates, the rent may be a taxable supply for VAT purposes. This can push your taxable turnover over the £90,000 threshold and trigger a registration requirement.
  • Using a single VAT registration for multiple sites. A multi-site group can use a single VAT registration, but the partial exemption calculation must cover all sites. You cannot cherry-pick which sites to include.
  • Failing to review the de minimis threshold regularly. The de minimis limits are £625 per month on average for total input VAT and exempt input VAT. If your costs fluctuate, you might fall in and out of de minimis from quarter to quarter.
  • Not documenting the cost sharing arrangement. If you set up a CSG, you need a formal agreement, a clear cost allocation methodology, and evidence that the CSG is operating at cost. HMRC will ask for this documentation if they review the arrangement.

How a Dental-Specialist Accountant Can Help

VAT partial exemption and cost sharing are specialist areas. A general practice accountant may not have the dental-specific knowledge to get the calculation right. A dental-specialist accountant understands the nuances of Schedule 9 Group 7, the £90,000 threshold, and the cost sharing exemption [1].

We can help you:

  • Map your income streams across all sites
  • Model the standard method versus a special method
  • Evaluate whether a cost sharing group makes financial sense
  • Prepare and submit a special method application to HMRC
  • Set up and document a cost sharing arrangement
  • Review your quarterly partial exemption calculations
  • Defend your position in a VAT inspection

If you are a multi-site dental group owner, do not leave VAT to chance. A mistake in the partial exemption calculation can cost tens of thousands of pounds in irrecoverable VAT, or trigger an HMRC assessment with interest and penalties.

Contact us for a free practice health check to review your VAT position. We also offer practice accounting services tailored to multi-site groups. For more on the fundamentals, see our dental guides on VAT and compliance.

Speak to a dental-specialist accountant for advice specific to your group's circumstances.

Sources

  1. gov.uk: Health professionals and pharmaceutical products (VAT Notice 701...
  2. retiring-dentist.co.uk: Multi-Site Mixed Dental Group for Sale with... - Retiring Dentist