VAT isn’t based on your year-end: how the threshold actually works

One of the most common VAT misunderstandings I see is this:

“I’ll check VAT at my year-end.”

Totally understandable, but VAT registration isn’t based on your accounting year-end. For most UK businesses, the key test is your rolling 12-month taxable turnover.

That means you need to keep an eye on your sales throughout the year, not just when you do your accounts.

What is the VAT threshold?

The UK has a VAT registration threshold, currently £90,000. If your taxable turnover goes over the threshold, you may need to register for VAT.

Two important points:

• It’s based on taxable turnover (not profit).

• It’s based on a rolling 12-month period, not a fixed January–December or April–March year.

  
  

(Threshold amounts can change over time, so always check the current figure if you’re close.)

What does “rolling 12-month turnover” mean?

Rolling 12 months means:

At the end of every month, you look back at the previous 12 months and total your taxable turnover.

So you’re constantly “rolling” forward.

Example:

• At the end of April, you check turnover from May to April

• At the end of May, you check turnover from June to May

• At the end of June, you check turnover from July to June

…and so on.

This is why businesses can get caught out: you can cross the threshold mid-year without realising.

Why your year-end doesn’t matter for VAT threshold checks

Your accounts might run:

• January to December, or

• April to March, or

• any other 12-month period you’ve chosen

  
  

But VAT threshold monitoring doesn’t care about that date range.

You could hit the threshold in (say) October even if your year-end is March and VAT rules still apply based on the rolling 12-month test.

What counts as “taxable turnover”?

Taxable turnover generally includes sales that are:

• Standard-rated

• Reduced-rated

• Zero-rated

  
  

It does not include:

• Exempt income (different from zero-rated)

• Sales outside the scope of VAT

  
  

If you’re not sure whether what you sell is taxable, zero-rated, or exempt, it’s worth checking,  it can make a big difference.

The “expected turnover” rule (the forward look)

There’s also another trigger: if you expect your taxable turnover will go over the threshold in the next 30 days alone, you may need to register immediately.

This often catches businesses with:

• A big contract landing

• A large invoice due

• A busy launch period

Practical tip: how to keep an eye on it (without it taking over your life)

A simple habit:

• At the end of each month, run a quick report of your last 12 months’ sales

• Keep a running total (spreadsheet or bookkeeping software report)

  
  

If you’re using software like QuickBooks or Xero, you can usually pull this info quickly, but it still needs a human eye on it.

If you’re close to the threshold…

Don’t panic, but don’t ignore it either.

This is the point where it’s helpful to get advice, because VAT registration can affect:

• Your pricing

• Your cash flow

• Your admin workload

• Whether you can reclaim VAT on costs

  
  

Sometimes registering is a no-brainer, sometimes it needs planning.

Want me to sense-check where you are?

If you’re unsure whether you’re approaching the VAT threshold (or you think you might have already crossed it), I can help you:

• work out your rolling 12-month turnover

• confirm what counts as taxable in your business

• plan next steps so there are no surprises

  
  

It’s also worth noting that some businesses choose to voluntarily register for VAT despite not reaching the VAT threshold. This can sometimes be more beneficial if you pay out lots of VAT and if you’re nearing the threshold so you don’t accidentally miss it. 

If you’d like to chat it through, you can book a call in with me here….

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