Quick answer: VAT group registration lets two or more eligible businesses under common control register as a single taxable person for VAT. The group gets one VAT number, files one VAT return through a representative member, and normally charges no VAT on supplies between its members. Every member is jointly and severally liable for the group's VAT debts, and the group's old individual VAT numbers are cancelled. You apply online by uploading form VAT50/51 with your VAT registration application, and HMRC has 90 days to make enquiries and may refuse the application.
What VAT group registration actually does
Normally, every VAT-registered business is a taxable person in its own right: it charges VAT on its sales, reclaims VAT on its purchases, and files its own returns. VAT grouping changes that. Under section 43 of the VAT Act 1994, two or more eligible persons can elect to be treated as a single taxable person. HMRC's guidance is VAT Notice 700/2. Once the group exists, three things follow:
- One VAT number. The registration is made in the name of the representative member, and that single number is used by every member. Any previous individual VAT numbers are cancelled.
- One VAT return. The representative member files a single return for the whole group and pays any VAT due or receives any repayment.
- Intra-group supplies are normally disregarded. No VAT is charged on supplies between members, because the group is one person and a person cannot supply to itself.
Each member keeps its separate legal identity; only its VAT identity is merged.
Who can join a VAT group
Eligibility has two hard conditions, and both must be met by every member:
- UK establishment. Each member must be established, or have a fixed establishment, in the UK. A company with no UK presence cannot join a UK VAT group.
- Common control. All members must be controlled by one member of the group, or by a single other person who is not a member. "Control" here has a specific legal meaning, based on the holding-company and subsidiary definitions in the Companies Act 2006 — in practice, a parent company controlling its subsidiaries, or one person controlling several companies, is the classic pattern.
Companies of all types and limited liability partnerships (LLPs) are the usual members. Individuals and partnerships can also join, but only if they control the UK body corporate or corporates in the group and are carrying on a business with a UK establishment. A person can only be in one VAT group at a time. One extra layer applies to large groups: since 1 August 2004, "specified bodies" in groups with turnover over £10 million a year must pass two further tests (the benefits condition and the group-accounts consolidation condition).
The pros: why groups register
No VAT on supplies between members
This is the main prize, and it matters most where one member cannot fully recover input VAT. Suppose a property group has a management company that provides services to a sister company that lets residential property (an exempt supply). Outside a group, the management company charges VAT on its services and the letting company cannot reclaim it. Inside a group, the supply is disregarded and no VAT arises at all.
A management company charges a sister company £60,000 a year for administration services. Outside a VAT group, that invoice carries 20% VAT: £60,000 × 20% = £12,000. If the sister company recovers only 40% of its input VAT because most of its supplies are exempt, it loses 60% of that £12,000 — £7,200 a year of irrecoverable VAT. Inside a VAT group, the £60,000 charge is disregarded, no £12,000 of VAT arises, and the £7,200 annual cost simply disappears. Over five years, that is £36,000 saved on a single internal charge.
One return, one registration threshold, one set of limits
The group is a single taxable person, so several administrative limits apply to the group as a whole rather than to each member:
| Rule | How it applies to the group |
|---|---|
| Registration threshold (£90,000) | Tested on the group's external taxable turnover as one person — two £60,000 subsidiaries (£120,000 combined) cross it as a group, though neither does alone |
| Partial exemption de minimis | Applies to the group as a whole, not to each member individually |
| Cash accounting limit (£1.35m) | Group-wide |
| Payments on account (£2.3m) | Group-wide |
| Error-correction disclosure limit | Group-wide |
The cons: what grouping costs you
Joint and several liability
This is the biggest downside. The representative member files and pays, but every member is jointly and severally liable for the group's VAT debts. If the group owes HMRC £48,000, HMRC can pursue any single member for the full £48,000 — not just for that member's share. A profitable, well-run subsidiary can end up paying for another member's failure. Groups usually manage this with internal agreements and cash controls, but no internal agreement binds HMRC.
One VAT number, one identity
When the group is formed, every member's old VAT number is cancelled and replaced by the group number, so invoices, supplier records and customer systems all need updating. If the group is later disbanded, the group number is cancelled and members that still need to be registered must register again for new numbers. The group number stays the same even if the membership or the representative member changes.
You cannot pick and choose members freely
A company cannot be in two VAT groups, and a company registered in the names of its divisions cannot have a division inside a VAT group — the two facilities cannot be combined. Adding or removing a member requires a fresh application, and HMRC can refuse changes for the protection of the revenue. If a member stops being under common control — for example, it is sold — it must leave the group.
Group-wide limits can hurt
The same group-wide application of limits that helps some groups hurts others. A partly exempt member that would have passed the de minimis test on its own may fail it as part of a group, because the test is applied to the group's total exempt input tax. Likewise, a small member that could have used cash accounting on its own may be blocked because the group's turnover exceeds the £1.35 million limit.
How to apply: VAT50/51 step by step
- Confirm eligibility first. Check that every proposed member is UK-established and under common control, and that no member is already in another VAT group. Choose the representative member.
- Register for VAT online. Most businesses must register online, including groups. As part of the online VAT registration application, complete form VAT50/51 (the group registration form) and upload it.
- If you cannot register online, contact HMRC to request a paper VAT1 form, complete it alongside VAT50/51, and send both by post.
- Authorise an agent if needed. If your accountant will register the group or make changes on your behalf, you must authorise them using form VAT53.
- Wait — and act as if approved. HMRC will write to you within 40 working days to confirm the date your application was received, and has 90 days from receipt of the complete application to make enquiries. While waiting, treat the application as provisionally accepted from the date HMRC received it and account for VAT accordingly. One trap: you cannot charge or show VAT on invoices until the group VAT number has been assigned, even though you still owe HMRC VAT for the period — HMRC advises increasing prices to allow for this and reissuing invoices once the number arrives.
- If refused, it is as if approval never happened. A refused application is treated as annulled.
Timing and backdating
An application normally takes effect from the date HMRC receives it, or from a later date you specify. Backdating is possible but narrow: normally only up to 30 days before HMRC received the application, and only if that date is the start of the current accounting period of the existing group or of a member joining or leaving. Backdating beyond 30 days requires exceptional circumstances — for example, HMRC losing your application — and HMRC expressly says that wishing you had grouped earlier does not count.
Changing the group later
Once registered, you can add members, remove members, change the representative member, or disband the group. Disbanding can be done online; other changes require forms sent to HMRC by post — VAT50/51 for adding or removing members, and VAT56 to change the representative member if the new representative is not already a group member. When a group is disbanded, the group VAT registration is cancelled and any members still liable (or wanting voluntary registration) must register again for new numbers.
When VAT grouping is not the right move
Grouping is designed for genuine groups under common control — it is not a tool for unrelated businesses to share a VAT number, and HMRC may refuse any application where grouping would result in VAT avoidance or significantly decrease the VAT paid. If the members are not under common control, if one member's creditworthiness worries the others, or if the only benefit is administrative, separate registrations are simpler and safer. If your structure involves overseas establishments, take advice: supplies between a UK group member and its overseas establishment are not always disregarded, following the Skandia judgment.
See also our when to register for VAT and how to file a VAT return guides.
Frequently asked questions
Can a sole trader join a VAT group?
An individual can join a VAT group, but only if they control the UK company or companies in the group and are carrying on a business with a UK establishment. Grouping needs two or more eligible persons under common control.
Do group members keep their own VAT numbers?
No. When the group is registered, each member's previous VAT number is cancelled and one new group number is issued. That number is used by all members, and it stays the same even if members join or leave or the representative member changes.
What happens to VAT on supplies between group members?
Supplies between members are normally disregarded for VAT — no VAT is charged and none is reclaimed on them. There are exceptions, notably where a member has an overseas establishment.
Who pays if the group owes HMRC money?
The representative member files the return and pays, but all members are jointly and severally liable. HMRC can recover the full debt from any one member, regardless of which member generated it.
Can HMRC refuse a VAT group application?
Yes. HMRC will refuse if the eligibility conditions are not met, and may refuse any application to form, change or disband a group for the protection of the revenue — for example, where grouping would give rise to VAT avoidance or significantly decrease the VAT paid. A refused application is treated as if it had never been approved.
How do I leave or disband a VAT group?
Use form VAT50/51 to add or remove members or to disband the group; use form VAT56 to change the representative member if the new representative is not already a member. Disbanding cancels the group VAT number, and members that still need registration must register again.
Use our free VAT calculator to check the VAT on any transaction, and read our how to pay VAT and zero-rated vs exempt VAT guides for the payment mechanics and the taxable-versus-exempt distinction behind the grouping decision.
Educational information and estimates. These tools do not submit VAT returns or determine the treatment of a specific transaction.