VAT registration decision
Crossing £90,000 forces you to register, but registering early can help or hinder depending on who your customers are. This weighs the cost against the reclaim and gives a verdict.
How the decision is modelled
The first test is simple. If your rolling 12-month turnover is at or above £90,000 you have no choice: registration is compulsory within 30 days. Below that, the answer turns on who buys from you. When your customers are VAT-registered businesses, the VAT you add is money they claim straight back, so adding it does not really raise your price. You then pick up the right to reclaim VAT on your own costs, which is a clear gain. That is why registering early often pays for business-to-business sellers.
When you sell to consumers, registering costs you. Hold your prices and every sale becomes VAT-inclusive, so one sixth of it goes to HMRC. Raise prices by 20% instead and you are dearer than unregistered competitors. The tool nets the input VAT you could reclaim against that loss, and only calls for voluntary registration when the reclaim actually outweighs the loss.
Worked example
On £78,000 of turnover you are £12,000 below the threshold, with £9,000 of reclaimable costs giving £1,800 of input VAT. Selling to consumers and holding your prices, the VAT inside each sale costs £13,000, so after the reclaim the net effect is -£11,200 a year. The verdict is wait.
Common questions
When must I register for VAT?
You must register once your taxable turnover over any rolling 12 months goes above £90,000, or if you expect to pass it in the next 30 days. It is a rolling test, not your accounting year, so watch a busy few months carefully. Registration then has to happen within 30 days.
Should I register before I have to?
Voluntary registration makes sense when your customers are VAT-registered businesses, because they reclaim the VAT you charge so your prices do not really rise, and you get to reclaim VAT on your own costs. If you sell to the public it is usually a disadvantage, because you either raise prices 20% or absorb the VAT within your margin.
On £78,000 turnover, should I register?
At £78,000 you are £12,000 below the threshold. The verdict here is wait: Registering would cut your margin more than the reclaim returns. Register only when turnover nears £90,000.
What happens to my prices if my customers are consumers?
You have two choices. Add 20% on top, which makes you dearer than an unregistered rival, or hold your price and treat it as VAT-inclusive, which hands one sixth of every sale to HMRC. Either way it costs you, softened only by the input VAT you can now reclaim on purchases.
Can I stay under the threshold on purpose?
Yes, and many small businesses do, by turning down work or closing for part of the year near the limit. It is legal but it caps your growth. If you are consistently approaching the threshold, registering and pricing VAT in properly is usually the cleaner long-term answer.