Chapter 10: VAT -- When and Why It Matters

Tax year notice: This guide uses 2025/26 tax year figures (6 April 2025 -- 5 April 2026). Check gov.uk for the latest rates.

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VAT is not income tax

VAT (Value Added Tax) is a tax on consumption, not on your income or profit. It's added to the price of most goods and services. When you buy a 100 item with 20% VAT, the item costs 100 and the VAT is 20 -- making the total 120. The business collects that 20 and passes it to HMRC.

This is the critical concept: VAT isn't the business's money. It's tax collected on behalf of HMRC. The business is just the collection point.

As a sole trader, VAT only becomes your problem when your business reaches a certain size. Below the threshold, you don't charge VAT and you don't reclaim it. Above the threshold, you must register, charge VAT on your sales, and file VAT returns.

The 90,000 threshold

You must register for VAT if:

• Your taxable turnover in the last 12 months exceeded 90,000, OR
• You expect it to exceed 90,000 in the next 30 days alone

Turnover, not profit. This is where people get caught. If Sam sells 95,000 worth of clothes but only makes 20,000 profit, the turnover is 95,000 -- above the threshold. Sam must register.

You must register within 30 days of exceeding the threshold. Late registration means you owe VAT from the date you should have registered, not the date you actually did.

You can deregister if your turnover falls below 88,000 (the deregistration threshold).

Jargon Buster: Taxable turnover The total value of everything you sell that's not VAT-exempt. This is your income, not your profit. It includes zero-rated items (which are technically "taxable" at 0%) but excludes VAT-exempt items.

Voluntary registration

You can register for VAT even if your turnover is below 90,000. Why would you?

Reasons to register voluntarily:

• You buy a lot of VAT-inclusive supplies and want to reclaim the VAT (Steve buys materials, fuel, and tools -- all include 20% VAT)
• Your customers are VAT-registered businesses who can reclaim VAT anyway (B2B customers don't care about the VAT on your invoices -- they claim it back)
• It makes your business look more established

Reasons not to register voluntarily:

• If you sell to consumers (B2C), your prices effectively increase by 20% unless you absorb the VAT
• You must file quarterly VAT returns (more admin)
• You must keep more detailed records
• If you sell VAT-exempt items, the maths gets complicated

For Sam selling clothes to consumers on Unbought, voluntary registration would mean either raising prices by 20% (losing customers) or absorbing the VAT (reducing profit by 20%). Unless Sam's business expenses include a lot of VAT, it's not worth it.

For Steve, whose clients are a mix of consumers and businesses, it depends on how much VAT he pays on supplies. If Steve spends 15,000/year on VAT-inclusive materials, tools, and fuel, he's paying about 2,500 in VAT that he could reclaim.

The three VAT rates

Rate	Percentage	Applies to
Standard	20%	Most goods and services
Reduced	5%	Home energy, child car seats, some energy-saving products
Zero-rated	0%	Most food, children's clothing, books, newspapers, public transport

There's also VAT-exempt, which sounds the same as zero-rated but isn't:

• Zero-rated: Taxable at 0%. You still charge VAT (at 0%) and can reclaim VAT on related purchases.
• Exempt: Not taxable at all. You don't charge VAT, but you also can't reclaim VAT on related purchases.

Exempt items include insurance, financial services, education, and health services.

For most businesses, everything is standard rate (20%). Sam's clothing sales are standard rate. Steve's gardening services are standard rate. The distinction matters most if you sell a mix of differently rated items.

Jargon Buster: Zero-rated vs exempt Both mean no VAT is charged to the customer. The difference: zero-rated lets you reclaim VAT on your costs; exempt doesn't. If you sell exempt items, you can't reclaim the VAT on supplies related to those sales.

How VAT works in practice

Once registered, every sale and purchase has a VAT element:

Sales (output VAT): You charge VAT on top of your prices. A 100 item becomes 120 (100 + 20% VAT). You owe that 20 to HMRC.

Purchases (input VAT): When you buy supplies, you pay VAT. A 50 purchase might include 8.33 of VAT (50 / 1.2 x 0.2). You can reclaim that 8.33 from HMRC.

The VAT return: Each quarter, you calculate:

• Total output VAT (what you charged customers)
• Minus total input VAT (what you paid on purchases)
• = What you owe HMRC (or what HMRC owes you)

If you charged 4,000 in VAT on sales and paid 1,500 in VAT on purchases, you owe HMRC 2,500.

If your input VAT exceeds your output VAT (common in startup phases when you're buying a lot of equipment), HMRC refunds the difference.

The Flat Rate Scheme

If your turnover is under 150,000, you can use the Flat Rate Scheme instead of tracking input and output VAT separately.

You charge your customers the normal 20% VAT, but you pay HMRC a fixed percentage of your gross turnover (including VAT). The percentage depends on your trade:

Trade	Flat rate
Retailing (not food, vehicle, or computer)	7.5%
Computer and IT consultancy	14.5%
Hairdressing	13%
Gardening services	Not specifically listed -- check gov.uk
Labour-only building	14.5%

Example: Sam's VAT-inclusive turnover is 120,000. Under the Flat Rate Scheme (retail at 7.5%), Sam pays HMRC 9,000. Under standard VAT, Sam might pay more or less depending on input VAT.

First year bonus: In your first year of VAT registration, you get a 1% discount on the flat rate.

The Flat Rate Scheme is simpler (no tracking input VAT) but usually costs more than standard VAT if your business has significant purchases. It suits businesses with low costs and high margins (consultants, freelancers) more than those buying lots of stock.

Jargon Buster: Flat Rate Scheme A simplified VAT scheme where you pay HMRC a fixed percentage of your turnover instead of calculating input and output VAT separately. Simpler admin but potentially higher cost.

The 9 boxes

A standard VAT return has 9 boxes. The names are formal but the concepts are simple:

Box	What it is	Plain English
1	VAT due on sales	Output VAT -- what you charged customers
2	VAT due on acquisitions from EU	VAT on goods bought from EU countries
3	Total VAT due (Box 1 + Box 2)	Total you owe
4	VAT reclaimed on purchases	Input VAT -- what you paid on business purchases
5	Net VAT to pay or reclaim (Box 3 - Box 4)	The actual amount you pay HMRC or they refund
6	Total sales excluding VAT	Your turnover for the quarter
7	Total purchases excluding VAT	Your total purchases for the quarter
8	Total supplies to EU	Value of goods/services sold to EU
9	Total acquisitions from EU	Value of goods/services bought from EU

For most sole traders, boxes 1, 4, 5, 6, and 7 are the only ones that matter. Your accounting software fills these in automatically from your categorised transactions.

Cash accounting vs accrual

When you register for VAT, you choose an accounting method:

Cash accounting: You account for VAT when money actually changes hands. Sale counted when the customer pays you. Purchase counted when you pay the supplier.

Accrual accounting: You account for VAT when invoices are issued, regardless of when payment is received.

Cash accounting is better for most small businesses because you don't pay VAT to HMRC on sales you haven't been paid for yet. If a client is slow to pay, you're not out of pocket on the VAT.

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Real Scenario: Sam approaching the threshold

Sam's Unbought business has grown significantly. Monthly sales are now averaging 7,000. Over the last 12 months, total sales hit 84,000. Sam is watching the rolling 12-month total carefully.

At the current growth rate, Sam will exceed 90,000 within two months. Sam has three choices:

1. Wait and register when required. Sam must register within 30 days of exceeding 90,000. From that point, Sam must charge VAT on all sales.

2. Register voluntarily now. Sam starts charging VAT immediately, reclaiming VAT on purchases, and gets used to the system before the rush.

3. Slow growth to stay below. Not recommended -- artificially limiting your business to avoid admin is rarely the right answer.

Sam chooses option 2 and registers voluntarily at 84,000 turnover. Sam opts for the standard VAT scheme with cash accounting. A 100 dress on Unbought now shows as 120 (100 + 20 VAT). Sam's Unbought listing prices increase, but most competitors at this level are also VAT-registered, so it's a level playing field.

Real Scenario: Steve's voluntary registration decision

Steve's turnover is 36,000 -- well below the 90,000 threshold. Should Steve register voluntarily?

Steve's annual VAT on purchases:

• Materials: 2,400 (includes 400 VAT)
• Fuel: 3,600 (mileage -- no VAT reclaim with mileage allowance, but if Steve switched to actual costs, fuel includes about 600 VAT)
• Tools: 1,800 (includes 300 VAT)
• Van insurance: 1,200 (exempt -- no VAT)
• Total reclaimable VAT: approximately 700--1,300/year

Steve's VAT on sales: At 20%, Steve would charge 7,200 in VAT on 36,000 of services.

Net cost: 5,900--6,500 paid to HMRC. Steve's consumer clients would see a 20% price increase. Most of Steve's clients are homeowners, not businesses, so they can't reclaim the VAT.

Decision: Steve does not register. The reclaimable VAT (700--1,300) doesn't justify the 7,200 charged to clients. When Steve's turnover approaches 90,000, the equation will change.

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Decision Tree: Should I register for VAT voluntarily?

• Is your turnover above 90,000? -- You must register. No choice.
• Are most of your customers VAT-registered businesses? -- Yes: voluntary registration costs your customers nothing (they reclaim the VAT). Consider registering.
• Do you have significant VATable purchases? -- Yes: you could reclaim 20% of those costs. Weigh the reclaim against the admin burden.
• Are your customers consumers? -- Yes: registration effectively raises your prices by 20%. Usually not worth it below the threshold.

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Jargon Buster

Term	Plain English
VAT (Value Added Tax)	A 20% tax added to most goods and services, collected by businesses and passed to HMRC
Taxable turnover	Total value of sales that are subject to VAT (standard, reduced, or zero-rated)
Output VAT	VAT you charge on your sales
Input VAT	VAT you pay on your purchases
VAT return	A quarterly report to HMRC showing VAT collected and VAT paid, with the net amount owed
Flat Rate Scheme	A simplified VAT scheme where you pay a fixed percentage of turnover instead of tracking each transaction
Cash accounting	Accounting for VAT when money changes hands, not when invoices are issued
Accrual accounting	Accounting for VAT when invoices are issued, regardless of when payment is received
Zero-rated	Subject to VAT at 0% -- you still charge VAT (at zero) and can reclaim input VAT
Exempt	Not subject to VAT at all -- you don't charge VAT and can't reclaim input VAT on related purchases
VAT registration threshold	Currently 90,000 in taxable turnover over a rolling 12-month period