The VAT Line Is Closer Than You Think: A 30-Minute Readiness Audit for Sole Traders

VAT has a reputation for sneaking up on sole traders. One month you're comfortably under the threshold, the next your accountant is using words like 'compulsory registration' and your stomach drops. The truth is less dramatic. The VAT line is predictable if you watch the right number — and a 30-minute audit now can save you a messy scramble later.

Set a timer, open your accounting software and work through this in order. You don't need to become a tax expert. You just need to know where you stand.

Know which line you're actually watching

For most sole traders, the relevant figure is taxable turnover over a rolling 12-month period, not your profit and not your calendar-year sales. The current registration threshold is £90,000. Once your taxable turnover goes over that line in any rolling 12 months — or you expect it to in the next 30 days — registration comes into play.

That rolling bit matters. A strong quarter can push you over even if the year as a whole looks quiet. So don't wait for your year-end accounts to tell you something you could have seen months earlier.

Minute 0-5: Pull your rolling 12-month figure

Open your bookkeeping software or spreadsheet and run a sales report for the last 12 months. If you use cloud accounting, look for a turnover report or filter invoices by date. Write the total on a sticky note and put it somewhere visible. Then do the same for the previous 12 months, so you can see the direction of travel.

If you're within a few thousand pounds of £90,000, treat this as amber. Not red. Amber means pay attention, not panic.

Minute 5-10: Check your records can survive a closer look

HMRC doesn't expect perfection from a sole trader, but it does expect records that add up. Can you match sales to invoices, bank deposits and receipts? Are your invoices numbered and dated? Do you have a clear list of customers and what they paid for?

If your record-keeping is a shoebox and a hopeful memory, spend the next five minutes writing down the gaps. You don't have to fix everything today. You do need to know what you'd have to pull together if you registered.

Minute 10-15: Run the pricing maths

VAT is usually charged on top of your price, but the customer sees the total. That can change how your offer feels. If you invoice a business client £1,000 plus VAT, they may reclaim the VAT and care less about the 20%. If you sell to consumers, a £1,000 price can become £1,200 overnight unless you absorb some of it.

Jot down your three best-selling products or services. For each one, write the current price, the VAT-inclusive price at 20%, and what your margin looks like if you absorb the VAT instead. You don't need a final answer yet. You need to see which customers and contracts will feel the change most.

Minute 15-20: Check your invoicing and software

Can your current setup produce a VAT invoice with the right details? Does your accounting software handle VAT returns, or will you be wrestling a spreadsheet at midnight? If you're still invoicing from a word processor, this is the moment to look at a simple cloud package.

Also think about cash flow. VAT collected from customers isn't your money — it's a temporary loan that HMRC wants back. A separate savings pot or bank account for VAT makes that mental shift easier. Set one up now, even if it stays empty for a few months.

Minute 20-25: Understand the timing

Registration isn't instant, and the deadlines aren't something to guess at. HMRC has rules about when you must register and when your first VAT period starts. If you think you're close, speak to your accountant or check HMRC's guidance directly. The aim today is to know who you'd call and what you'd ask, not to memorise the legislation.

Put a date in your diary to recheck your rolling turnover in a month. If you're growing steadily, check monthly. If you're seasonal, check after your busy period.

Minute 25-30: Write a one-page readiness plan

Before you close the laptop, write five lines:

• My rolling 12-month taxable turnover today is £____.
• My amber trigger is £____ (a figure that gives me time to act).
• The first person I'll call is ____.
• The price or contract I need to review first is ____.
• The date I'll recheck this is ____.

That's it. You've turned a vague worry into a practical list.

The calm version

Crossing the VAT threshold isn't a failure or a sign that you've accidentally become a big business. It's an admin milestone. The founders who cope best are the ones who see it coming, ask for help early and give themselves room to adjust prices, systems and cash flow. Thirty minutes now is a lot cheaper than a panicked week later.