Most creative agencies don't have a revenue problem. They have a profit-visibility problem.
You can be fully booked, invoicing well, and still wondering why the bank balance never grows. Usually it's because the numbers that matter, profit per project and the true cost of a retainer, are buried under a top-line turnover figure that tells you almost nothing.
This guide is for agency owners and finance leads who want to fix that. We'll cover how to account for retainers properly, how to measure whether a project actually made money, and how to price work so the margin is there by design rather than by accident. We'll keep the tax figures grounded in current HMRC rates and label every worked example clearly.
Why is creative agency accounting different?
A product business sells a thing. An agency sells time, expertise, and outcomes, often before any cash arrives and sometimes long after the work is done. That timing gap is where agency accounting gets interesting.
Three features make it tricky:
- Revenue and delivery rarely line up. You invoice a retainer on the 1st but deliver the work across the month. You bill a project up front but burn the hours over a quarter.
- Your biggest cost is people, not stock. Salaried staff get paid whether they're billable or idle, so utilisation drives profit more than headline fees do.
- Pass-through costs distort the top line. Media spend, print, freelancers, and licences can flow through your accounts but aren't really your income.
Get the bookkeeping right and these stop being problems. Get it wrong and you'll either overstate profit (and pay tax on money you haven't truly earned) or fly blind on which clients are worth keeping. Solid bookkeeping for your agency is the foundation everything else sits on.
How should you account for a retainer?
A retainer is money received for work you've promised to do over a period. The accounting principle is simple: recognise the income as you earn it, not when the cash lands.
If a client pays a £6,000 retainer covering three months, you don't book £6,000 of revenue in month one. You recognise roughly £2,000 a month as you deliver, and the unearned balance sits on your balance sheet as deferred income (a liability, because you still owe the work).
This matters for two reasons. First, it gives you an honest monthly profit figure instead of a lumpy one. Second, it stops you paying Corporation Tax early on income you haven't yet earned.
For 2025/26 the small profits rate of Corporation Tax is 19% on profits up to £50,000, and the main rate is 25% on profits over £250,000, per gov.uk's Corporation Tax rates. Booking a year's retainer as revenue in one quarter can shunt your profit into a higher effective band in that period, so the timing genuinely affects the bill.
A quick rule of thumb:
- Cash in, work not yet done = deferred income (liability).
- Work done, not yet invoiced = accrued income (asset).
Most decent agency-friendly bookkeeping software will handle this if you set retainers up as deferred revenue rather than one-off sales invoices.
Does cash or accrual VAT suit a retainer agency?
If you're VAT-registered (the registration threshold is £90,000 of taxable turnover, per gov.uk), you'll account for VAT under either the standard accrual basis or the Cash Accounting Scheme. They differ on timing.
| Basis | When you owe output VAT | Best for |
|---|---|---|
| Standard (accrual) | When you raise the invoice, paid or not | Agencies paid promptly, or reclaiming lots of input VAT |
| Cash Accounting Scheme | When the client actually pays you | Agencies carrying late-paying clients |
Under the Cash Accounting Scheme you pay VAT on sales only when your customers pay you, and reclaim VAT on purchases when you pay your suppliers, per gov.uk's VAT Cash Accounting Scheme guidance. To join, your VAT taxable turnover must be £1.35 million or less. You must leave the scheme if your VAT taxable turnover is more than £1.6 million, per gov.uk.
For an agency that bills retainers up front and gets paid on time, the difference is small. For one that does big project invoices and waits 60 to 90 days for payment, cash accounting can ease the squeeze of paying VAT on money you haven't collected yet.
One thing to keep separate in your head: the VAT timing rules are independent of how you recognise revenue in your accounts. You can defer income in your management accounts and still owe VAT on the invoice date under the standard basis. They answer different questions.
How do you measure project profitability?
Top-line revenue lies. Gross profit per project tells the truth.
The calculation is straightforward once you have the inputs:
Project gross profit = project revenue − direct delivery cost
Direct delivery cost is the time your team actually spent (at their fully-loaded cost, not their salary alone) plus any freelancers, licences, or media bought specifically for that job. Fully-loaded cost means salary plus employer's National Insurance, pension contributions, and a share of overhead.
For 2025/26, employer's (secondary) Class 1 National Insurance is charged at 15% on earnings above the Secondary Threshold of £5,000 a year, per gov.uk's rates for employers. That's a real cost of employing each fee-earner and it belongs in your cost-per-hour calculation, not as an afterthought.
To get there you need three things working together:
- Time tracked against jobs, even loosely. You can't cost a project you didn't time.
- A cost rate per person, derived from their fully-loaded annual cost divided by realistic billable hours.
- A clean split of pass-through costs so media and print don't inflate your apparent revenue or margin.
Do this and you can finally answer the question that should drive every pitch decision: which clients and which types of work actually make us money?
Worked example: is this retainer actually profitable?
Illustrative example. Northlight Studio (a fictional branding agency) runs a £4,000-a-month retainer for a client. The owner assumes it's a good earner. Let's test it.
In a typical month the team logs 38 hours against the account:
- A mid-weight designer: 24 hours at a fully-loaded cost of £45/hour = £1,080
- A senior creative: 10 hours at £70/hour = £700
- An account manager: 4 hours at £55/hour = £220
Direct delivery cost = £1,080 + £700 + £220 = £2,000
Northlight also pays a freelance copywriter £400 for the month on this account.
Total direct cost = £2,000 + £400 = £2,400
Gross profit = £4,000 − £2,400 = £1,600, a gross margin of 40%.
That's below where most studio-led agencies want to sit. Now look at the effective rate: the agency is delivering 38 internal hours plus freelance support for £4,000, so its blended effective rate on internal time is £4,000 ÷ 38 = roughly £105 an hour before the freelance cost, and the freelance work is eating into the margin further.
The fix isn't always "charge more". It might be capping the senior creative's hours, moving the copywriting in-house, or renegotiating scope. But you can only see the lever to pull once the job is costed. Run this across every client and the under-performers jump out immediately.
(Figures above are illustrative and chosen to show the method, not real client data.)
How should you price a retainer to protect margin?
Pricing backwards from cost is how you stop margin leaking. Work in this order:
- Start with the fully-loaded cost of the people who'll deliver the work, including the 15% employer's NIC noted above and a share of overhead.
- Estimate realistic billable hours. Creative staff are rarely 100% billable. Plan around the hours you can genuinely sell, not the hours in a contract.
- Apply a target gross margin. Decide the margin you need to cover overhead and leave a net profit, then set the fee so the costed delivery hits it.
- Cap the scope in writing. A retainer without a defined deliverable or hour cap is an open invitation to scope creep, which quietly turns a 50% margin into a 20% one.
- Review quarterly. Costs rise, scope drifts. A retainer priced 18 months ago is probably underpriced now.
If you're scaling and want a finance partner who thinks like a commercial director rather than just a bookkeeper, our outsourced CFO support builds this pricing discipline into your monthly numbers. We work with advertising and creative agencies and the wider media and creative sector on exactly this.
What numbers should an agency owner watch monthly?
You don't need a finance degree. You need four numbers in front of you every month:
- Gross margin by client. Which accounts are carrying the studio and which are draining it.
- Utilisation. The share of available staff time that's billable. Idle paid time is pure cost.
- Deferred income balance. How much work you've been paid for but still owe, so you don't mistake cash for profit.
- Debtor days. How long, on average, clients take to pay. Slow payers strangle cash flow even on profitable work.
Get these onto a one-page monthly dashboard and the conversations change. You stop guessing and start managing.
Frequently asked questions
Should retainer income be recognised when invoiced or when earned?
When earned. If a client prepays for several months, you recognise the income across the period as you deliver the work, and hold the unearned portion as deferred income on your balance sheet. This gives a truer monthly profit and avoids paying Corporation Tax early on income you haven't yet earned.
What is a good gross margin for a UK creative agency?
There's no single official figure, and it varies by agency type. As a working benchmark, many studio-led and design agencies aim for a gross margin around 50% or higher, with full-service and media-buying agencies often lower because of pass-through costs. The point is to measure your own margin by client rather than chase a headline number.
Do I have to register for VAT as a creative agency?
You must register if your VAT taxable turnover exceeds £90,000, the current threshold per gov.uk. Below that you can register voluntarily, which can make sense if you buy a lot of VAT-able services and want to reclaim the input VAT.
Is the VAT Cash Accounting Scheme worth it for an agency?
It can be if you carry late-paying clients, because you only pay output VAT once the client pays you. You can join if your VAT taxable turnover is £1.35 million or less. For agencies that bill retainers up front and get paid promptly, the benefit is smaller.
How do I cost a fee-earner's time properly?
Use their fully-loaded cost, not just salary. Add employer's National Insurance (15% above the £5,000 Secondary Threshold for 2025/26), pension contributions, and a share of overhead, then divide by the billable hours you can realistically sell. That cost-per-hour is what you compare against the fee to see if a project makes money.
