Advanced Taxation (UK) · Value added tax

VAT Registration and Deregistration for ACCA ATX-UK

Updated 11 October 2026 · Fact-checked

You must register for VAT when taxable turnover in the last 12 months exceeds £90,000 (historic test) or is expected to exceed it in the next 30 days alone (future test). You may apply to deregister if expected taxable turnover in the next 12 months will not exceed £88,000. Voluntary registration is allowed below the limit.

Understand VAT Registration and Deregistration

VAT is charged on taxable supplies made by a taxable person in the UK. A business becomes a taxable person once it is registered, or is required to be. Registration lets it charge output VAT and reclaim input VAT.

Compulsory registration applies when taxable turnover passes the registration limit. The tax tables give this as £90,000, with a deregistration limit of £88,000. Taxable turnover includes standard-rated, reduced-rated and zero-rated supplies. It excludes exempt supplies, sales of capital assets and outside-the-scope supplies.

Voluntary registration is allowed even if turnover is below the limit. It suits a business that makes mainly zero-rated supplies or sells to VAT-registered customers, because it can reclaim input VAT and customers can recover the output VAT charged. It is less attractive if customers are private individuals who cannot reclaim VAT, because prices rise or margins fall. It also adds administration.

There are two compulsory tests. The historic test looks back at the last 12 months at the end of each month. The future test looks at whether turnover will exceed the limit in the next 30 days alone. You must apply both. Whichever gives the earlier date of liability applies.

Group registration lets companies under common control register as one VAT group. Supplies between members are ignored for VAT. One return is filed. This saves administration and can help where some members make exempt supplies. The drawbacks are joint and several liability for the VAT debts of all members, and that the group's partial exemption position is calculated together, which may worsen recovery.

Key rules to remember

Registration limit: Taxable turnover in the last 12 months > £90,000; Historic test. Applied at the end of every month. The tax tables give £90,000.
Historic test deadline: Notify HMRC within 30 days of the end of the month in which the limit is exceeded. Registered from the first day of the second month after that month, or an earlier agreed date.; Example: limit exceeded in March, notify by 30 April, registered from 1 May.
Future test: Expected taxable turnover in the next 30 days alone > £90,000; Notify HMRC by the end of the 30-day period in which the expectation arises. Registration takes effect from the start of that 30-day period.
Deregistration limit: Expected taxable turnover in the next 12 months ≤ £88,000; Voluntary deregistration is available only where taxable turnover is expected to stay at or below £88,000 in the next 12 months. A temporary fall in turnover is not a basis for deregistration. If the business ceases to make taxable supplies, it must notify HMRC within 30 days and deregister.
Late VAT payment penalties: Up to 15 days late: none. 16 to 30 days: 3%. More than 30 days: 6% plus daily penalty at an annual rate of 10%; From the tax tables.
Late registration: VAT is due from the date registration should have taken effect, whether or not it was charged to customers; A penalty for late notification also applies. State this without a rate unless the question gives one.

How to solve VAT Registration and Deregistration questions

Use this method for any registration or deregistration question.

1Identify what is asked: compulsory registration date, voluntary registration advice, deregistration, or group registration.
2List taxable supplies month by month. Exclude exempt and outside-scope supplies and sales of capital assets. Include zero-rated supplies.
3Apply the historic test. Accumulate the last 12 months at each month end and find the first month the total exceeds £90,000.
4Apply the future test separately. Check any 30-day period where large expected sales alone exceed £90,000.
5Work out the dates. For the historic test, notification is due 30 days after the month end and registration starts on the first day of the second month after. For the future test, notification is due by the end of the 30-day period and registration takes effect from the start of that period.
6Take the earlier date. State the notification deadline and the consequences of being late.
7For advice questions, weigh up the pros and cons for this client, using their customer type and supplies, and give a clear recommendation.

Quickest way: Rolling total scan

When to use it: When you are given a list of monthly or annual sales and asked for the registration date.

Write the monthly taxable sales in a row, ignoring exempt items.
Keep a running 12-month total and mark the first month it exceeds £90,000.
Date: month end plus 30 days notification, effective the first day of the second following month.
Check for any single large sale that triggers the future test earlier.
State the earlier date and quote the £90,000 and 30-day rules.

Common mistakes in VAT Registration and Deregistration

Including exempt supplies in taxable turnover.
Students add up total sales without checking the VAT status of each.
Fix: Tag each supply as standard, reduced, zero or exempt first. Only the first three count.
Treating registration as starting on the day of notification.
Confusion between the notification deadline and the effective date.
Fix: For the historic test, effective date is the first day of the second month after the month the limit is exceeded. Notification is by the 30th day after that month end.
Forgetting the future test.
The historic test is more familiar.
Fix: Always scan for a large expected contract or sale. If it alone is expected to exceed £90,000 in a 30-day period, the trader must notify HMRC by the end of that 30-day period, and registration takes effect from the start of that period.
Using £88,000 for compulsory registration.
The two limits are close and easily swapped.
Fix: £90,000 is for registration. £88,000 is for deregistration.
Assuming late registration only means a penalty.
Students overlook that VAT itself is owed.
Fix: VAT is due from the date registration should have started, even if not charged to customers. The business must absorb it or try to recover it, and a late notification penalty is added.
Saying group registration has only advantages.
Focus on simpler admin.
Fix: Mention joint and several liability and the effect on partial exemption as disadvantages.

Worked examples

Example 1

A trader began selling in January. Monthly taxable sales were: January to June £10,000 each, then July onward £12,000 each. Find the date the trader must be registered under the historic test, and the notification deadline.

Show the solution

Running total after June: 6 × £10,000 = £60,000.
July: £72,000. August: £84,000. September: £96,000.
September is the first month the total exceeds £90,000.
Notification deadline: 30 days after the end of September, so 30 October.
Registration effective: the first day of the second month after September, which is 1 November.

Answer: The limit is exceeded in September. Notify HMRC by 30 October. Registered from 1 November, or earlier if agreed.

Example 2

Mia is unregistered and has taxable turnover of £60,000 in the last 12 months. On 10 June she wins a one-off contract for £95,000, to be delivered and invoiced within 20 days. Advise on registration, and on what happens if she registers late.

Show the solution

Historic test: £60,000 is below £90,000, but the contract changes the position, so check the future test.
Future test: expected taxable turnover in the next 30 days alone is £95,000, which exceeds £90,000.
Mia must register. The 30-day period in which she expects the turnover starts on 10 June and ends on 9 July. She must notify HMRC by 9 July.
Registration takes effect from the start of that 30-day period, which is 10 June.
If she notifies late, she owes VAT from 10 June on her taxable supplies even if she did not charge customers.
She must also pay a late notification penalty, so she should notify promptly.

Answer: Mia must register under the future test. She must notify HMRC by 9 July, and registration takes effect from 10 June. Late notification means VAT is due from 10 June plus a penalty.

Exam tips

Draw a small table of monthly sales and a rolling total. It earns method marks and prevents slips.
Always state both limits, £90,000 and £88,000, and say which test applies.
For voluntary registration, link the advice to the customer type: business customers favour registration, private customers do not.
For group registration, give both advantages and disadvantages, then conclude for the client.
If a question mentions late VAT payment, use the tax table penalty bands: none up to 15 days, 3% for 16 to 30 days, 6% plus daily penalty beyond 30 days.

Practice questions from Value added tax

VAT Registration and Deregistration in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

ACCA Applied SkillsDeregistration from VAT

VAT Registration and Deregistration: frequently asked questions

What is the VAT registration threshold for ATX-UK?

The tax tables for June 2026 to June 2027 give a registration limit of £90,000 and a deregistration limit of £88,000. You must learn which limit is which, as the tables only list them.

What is the difference between compulsory and voluntary VAT registration?

Compulsory registration is required when taxable turnover passes the limit under the historic or future test. Voluntary registration is a choice made below the limit, often to reclaim input VAT. A voluntary registrant must then charge VAT and follow the same rules.

How does the future test differ from the historic test?

The historic test looks back over the last 12 months at each month end. The future test looks forward and asks whether turnover in the next 30 days alone will exceed £90,000. Under the future test, the trader must notify HMRC by the end of the 30-day period, and registration takes effect from the start of that period.

What are the pros and cons of VAT group registration?

Advantages include one return and ignoring supplies between members. Disadvantages include joint and several liability for all members' VAT and a possible reduction in input VAT recovery under partial exemption. You should tie the advice to the facts in the question.