VAT for Marketing Agencies: Registration, Schemes and What to Charge Clients

If you run a marketing agency in the UK, VAT is one of those topics that creeps up on you. You start trading, you invoice clients, you pay suppliers. Then one month your turnover crosses £90,000 and suddenly you have a 20% conversation with every client invoice you send.

This article covers the practical side of VAT for agencies. When you must register, which scheme to pick, what to charge your clients, and how to avoid the common mistakes that cost agency founders money. If you are a sole trader web designer turning over £65k or a 12-person digital agency billing £800k per year, the principles are the same. The details differ.

When Must a Marketing Agency Register for VAT?

The compulsory registration threshold in the UK is £90,000 of taxable turnover in any rolling 12-month period. Note: taxable turnover, not profit. And not just the current financial year. HMRC looks back over the last 12 months, every month.

So if your agency turns over £85,000 in the 11 months to February, then invoices £10,000 in March, you are over the threshold. You must notify HMRC within 30 days of the end of the month in which you exceeded it. Your effective date of registration will be the first day of the second month after you cross the threshold.

Real example: A Bristol-based PR agency hit £93,000 in a rolling 12-month period ending June. They notified HMRC in July. Their VAT registration became effective from 1 August. Every invoice raised on or after that date had to include VAT at 20%.

You can also register voluntarily before you hit the threshold. Some agencies do this deliberately. If your clients are all VAT-registered businesses themselves, they can reclaim the VAT you charge them. So registering early costs them nothing but lets you reclaim VAT on your own costs. More on that later.

Which VAT Scheme Should an Agency Use?

There are three main VAT schemes relevant to marketing agencies. Each has different rules and different outcomes for your cash flow and profitability.

Standard VAT Accounting

This is the default. You charge 20% on your invoices. You reclaim the VAT on your costs. Every quarter (or monthly, if you prefer) you file a VAT return and pay HMRC the difference between what you collected and what you reclaimed.

For a typical agency with a healthy gross margin of 50-65%, this works well. You collect a lot of VAT from clients but your main costs are salaries (no VAT), rent (usually VAT-inclusive), software subscriptions, and freelancers. The net payment to HMRC is manageable.

Example: A Shoreditch advertising agency bills £240,000 per quarter. They collect £48,000 in VAT. Their quarterly costs include £15,000 in VAT-inclusive software, £8,000 in freelancer fees (VAT-inclusive), and £4,000 in other VAT-inclusive costs. Total VAT reclaimed: £4,500. Net payment to HMRC: £43,500.

Flat Rate Scheme

The Flat Rate Scheme lets you keep a portion of the VAT you collect. Instead of reclaiming VAT on individual purchases, you pay HMRC a fixed percentage of your VAT-inclusive turnover. The percentage depends on your sector.

For marketing agencies, the flat rate is 12.5% (as of 2025/26). You charge clients 20%, pay HMRC 12.5% of the total invoice (including the VAT), and keep the difference.

On a £1,000 invoice: you collect £200 VAT. You pay HMRC 12.5% of £1,200 = £150. You keep £50.

But there is a catch. If you are a limited cost trader, the flat rate jumps to 16.5%. A limited cost trader is defined as someone whose relevant goods expenditure is less than 2% of their VAT-inclusive turnover, or less than £1,000 per year if the 2% calculation gives a lower figure. For most agencies, where the main cost is people (not goods), this applies. You buy software, not stationery. You pay freelancers, not manufacturers. So the 16.5% rate is common for agencies.

At 16.5%, the benefit shrinks significantly. On that same £1,000 invoice: you collect £200, pay HMRC 16.5% of £1,200 = £198, and keep £2. Hardly worth the paperwork.

The Flat Rate Scheme can still work for agencies with very low overheads. But check your goods spend before you opt in. If you are a limited cost trader, the standard scheme is usually better.

Cash Accounting Scheme

Under standard VAT accounting, you pay VAT to HMRC when you raise an invoice, regardless of whether the client has paid you. For agencies with 60-day payment terms, this creates a cash flow problem. You pay HMRC the VAT on a £20,000 invoice in month one, but the client pays you in month three.

The Cash Accounting Scheme fixes this. You account for VAT when you receive payment, not when you invoice. This is useful for agencies that work on project-based billing with extended payment terms.

You can use the Cash Accounting Scheme if your taxable turnover is under £1.35 million. Most agencies qualify.

What to Charge Clients: The Practical Reality

This is where many agency founders get stuck. You have just registered for VAT. Your standard retainer is £5,000 per month. Do you now charge £6,000? Or do you absorb the VAT?

The answer depends entirely on who your clients are.

If your clients are VAT-registered businesses: They can reclaim the VAT you charge them. So your invoice goes from £5,000 to £6,000. They pay £6,000, reclaim £1,000, and their net cost is still £5,000. No impact on them. You raise your prices by 20% on paper, but the client's real cost does not change.

If your clients are non-VAT registered businesses or consumers: They cannot reclaim the VAT. Your invoice goes from £5,000 to £6,000, and their cost genuinely increases by £1,000. You have effectively raised your prices by 20%. Some clients will accept this. Others will push back.

If you work mainly with small businesses or consumers, you have two options. Option one: absorb the VAT and reduce your margin. Option two: register for VAT and adjust your pricing so your VAT-inclusive prices match your previous VAT-exclusive prices. This means your actual revenue drops by 20% (the VAT element goes to HMRC), so your costs must drop too, or your profit margin shrinks.

Most agency founders in this position raise their headline prices by 20% and explain to clients that VAT is now chargeable. If clients are other businesses, it is usually a non-issue. If clients are consumers, expect some attrition.

VAT on International Work

Marketing agencies often work with overseas clients. The VAT rules here are different and worth understanding before you invoice.

Clients outside the UK but inside the EU: If you provide services to a business client in an EU country, the supply is usually outside the scope of UK VAT. You do not charge VAT. The client accounts for VAT in their own country (reverse charge). You must obtain their VAT number and include it on your invoice.

Clients outside the EU: Again, no UK VAT. The supply is outside the scope. You invoice without VAT.

Clients in the UK but the work is delivered overseas: If you are physically in the UK providing services to a UK client, you charge UK VAT regardless of where the work is used. The place of supply is where the supplier belongs, not where the customer uses the service.

If you do a lot of international work, your VAT position changes. You may find yourself in a repayment position (more VAT reclaimed than collected) because you are not charging VAT on overseas invoices but you are still paying VAT on UK costs. This is normal. HMRC will repay you.

Common VAT Mistakes Agencies Make

I have seen the same errors across dozens of agency clients. Here are the ones to avoid.

Mistake 1: Not registering on time. HMRC charges penalties for late registration. If you hit £90,000 in a rolling 12-month period and do not notify HMRC within 30 days, you can be fined. The penalty is calculated based on how late you are and how much VAT was due. It adds up fast.

Mistake 2: Using the wrong flat rate percentage. Many agencies sign up for the Flat Rate Scheme at 12.5% without checking their limited cost trader status. When HMRC reviews and finds you are a limited cost trader, they backdate the 16.5% rate and charge you the difference plus interest. I have seen bills of £8,000-£12,000 from this alone.

Mistake 3: Not issuing VAT invoices correctly. A VAT invoice must show your VAT registration number, the date of supply, a unique invoice number, a description of the services, the net amount, the VAT rate, and the total including VAT. If your invoices are missing any of these, your clients cannot reclaim the VAT, and they will ask you to reissue them.

Mistake 4: Ignoring the reverse charge on construction services. This is less common for marketing agencies but relevant if you do any work on physical premises (e.g. installing signage, AV equipment, exhibition stands). The Construction Industry Scheme (CIS) reverse charge for VAT applies. Get advice before you invoice for this kind of work.

Should You Register for VAT Voluntarily?

If your turnover is below £90,000, you can still register. The question is whether it benefits you.

Voluntary registration makes sense if:

• Your clients are all VAT-registered businesses (they reclaim the VAT, so it costs them nothing)
• You have significant VAT-inclusive costs (software, equipment, freelancers, rent) that you want to reclaim
• You want to appear larger and more established (some clients prefer working with VAT-registered suppliers)

Voluntary registration does not make sense if:

• Your clients are mainly consumers or non-VAT registered businesses (your prices effectively rise by 20%)
• Your costs are low (you have little VAT to reclaim, so you are just collecting VAT for HMRC with no benefit)
• You are close to the threshold anyway (you will have to register soon, so voluntary registration just accelerates the admin)

As ICAEW qualified accountants, we run this calculation for agency founders regularly. The answer depends on your specific client mix and cost base.

How to Handle the Transition

When you register for VAT, you need to decide how to handle existing contracts and invoices.

For work performed before your effective registration date, you cannot charge VAT. For work performed after, you must. If you have a retainer agreement that spans the registration date, you need to apportion the invoice. The portion relating to work before registration is VAT-exclusive. The portion after is VAT-inclusive.

This is fiddly but manageable. Most agencies simply agree with the client to start charging VAT from the first full month after registration. Make sure this is documented in writing.

You also need to update your contracts, your website terms, and your proposal templates. Every document that mentions pricing should clearly state whether prices are VAT-exclusive or VAT-inclusive.

VAT and Your Agency's Cash Flow

VAT is not your money. It belongs to HMRC from the moment you receive it. Many agency founders treat the VAT they collect as working capital and then struggle to pay the quarterly VAT bill. This is a fast route to HMRC debt collection.

Open a separate bank account for VAT. Every time a client pays you, transfer the VAT element into that account immediately. Do not treat it as revenue. Do not use it to pay salaries. It is not yours.

If you use accounting software like Xero or QuickBooks, set up a VAT control account and reconcile it monthly. Your accountant should review this as part of your management accounts. It is a simple discipline that prevents the most common VAT failure.

Getting Professional Help

VAT is straightforward for most agencies but the details matter. The wrong scheme choice, a missed registration deadline, or an incorrect invoice can cost you thousands. If your agency is approaching the £90,000 threshold, or if you are already registered and unsure whether you are on the right scheme, speak to a qualified accountant who works with agencies.

We handle VAT registrations, scheme reviews, and compliance for marketing agencies across the UK. If you want to check your current position, get in touch.