You're doing £5m. Your accountant just emailed you the year-end tax bill. It's the third time they've been in touch all year, and two of those were for the invoice.
That's not a dig at them. It's a structural fact. Most UK accountants are built to do one job: keep you compliant, file the returns, pay the tax. At £1m that's genuinely enough. At £5m it's like running a motorway with a driving instructor in the passenger seat. The instructor passed you years ago.
Here's the question I hear from founders every week, usually when they're about to spend £80,000 a year on the wrong answer: do I need a financial controller, or just a better accountant?
The honest answer is neither. As someone whose days are spent inside the books of UK brands scaling from £1m to £20m, I've watched this decision get made badly more often than it gets made well.
The Reality Check: Two Different Jobs, One Word
Let's start with what the titles mean, because the confusion is where the money goes.
An accountant, in the day to day sense, runs compliance. Statutory accounts, Corporation Tax, VAT, payroll, Companies House. It's a real job and at £5m a serious one: accounts are due at Companies House nine months after your year end, Corporation Tax nine months and one day after your accounting period ends, per GOV.UK. Miss either and there's a price. File the accounts late and Companies House levies an automatic late-filing penalty. Pay the Corporation Tax late and HMRC charges daily interest.
A financial controller runs the inside of the business. Management accounts every month. Cash forecasting. Stock and margin control. The banks and the lenders. The numbers the board should see before the year ends, not after.
In plain English? The accountant tells you what happened last year, in the format HMRC wants. The controller tells you what's happening now, in the format you need. One looks backwards at tax. The other looks forwards at cash.
And at £5m, backwards is a luxury you can no longer afford.
What Actually Changes at £5m
I keep saying £5m. It's not a magic number, it's the point where three things collide.
First, the business stops being simple. At £1m you probably have one channel, one currency, one warehouse. At £5m you have TikTok Shop, Amazon and Shopify running at once, each with its own settlement cycle, fee structure and returns pattern. You might have a second entity, an overseas warehouse, three currencies. The number of moving parts stops fitting in one spreadsheet, and the mistakes stop being small.
Here's the kicker. Under the digital platform reporting rules, TikTok and Amazon already report seller information to HMRC: who you are, what you're paid each quarter, fees withheld, transaction counts. Not the item-level detail of what you sell, but enough for your declared numbers to be cross-checked against it. Sloppy records used to be a private problem. Now they're a documented one.
Second, the tax bill stops being simple. Corporation Tax runs at 19% on profits under £50,000 and 25% on profits over £250,000, with marginal relief in between. That relief is worth real money. On a £150,000 profit year the effective rate is 24%, not 25%, which is £1,500 you keep if the calculation is done properly. Most software does this fine. The real question is whether anyone understands why it matters when you're deciding what the business spends, keeps or pays out.
Third, the team gets expensive. Employer National Insurance is 15% above a £5,000 threshold from April 2025, and that's before pensions, recruitment fees and the cost of a hire that doesn't work out. Every person you add is a fixed cost stepping up in stairs while your revenue grows in curves. The margins for error shrink at exactly the moment the decisions get bigger.
The £80,000 Question: Hire, Fractional, or Outsource?
You go looking for a financial controller, and the market gives you a number that makes you blink.
Payscale's UK data for 2026 puts the average financial controller on £55,351, with most salaries between £33,000 and £76,000. An experienced e commerce controller sits at the top of that band. Take £70,000. Add 15% employer National Insurance on everything above the £5,000 threshold, that's £9,750. Add a 3% pension, £2,100. You're at £81,850 before a bonus, software or recruitment fee.
That's the hire. So what does it actually buy you?
| Route | Year-one cost, worked | What you get | The catch |
|---|---|---|---|
| Full-time financial controller | £82k plus recruitment fee, software, bonus | Someone in the building, five days a week | One person, one business. If they leave, you start again. |
| Fractional controller | Typically well under half the all-in hire cost | The function, two or three days a week | Availability at month end, when everyone wants them. |
| Specialist ecommerce accountant with a management pack | A fixed monthly retainer, less than the hire, often much less | The function plus compliance plus tax, one team | Only if the firm actually delivers the pack. |
Here's my contrarian take, the one I give every founder who asks: most £5m brands don't need a financial controller. They need financial control. The title is not the job. The job is a monthly pack that tells you where the money went, a cash forecast that stops you over-ordering stock, and a stock and margin view that kills the SKUs quietly bleeding you dry.
If you hire a controller and they produce reports nobody reads, you've bought an £82,000 printer. If you buy the function from a team that already runs it for twenty other e commerce brands, you skip the recruitment risk, the notice period, and the year of training.
What the Function Must Deliver, Whoever Does It
Whether you hire, go fractional, or outsource, five things are non-negotiable. Can't deliver them? Then the answer isn't a new job title, it's a new supplier.
1. A management pack within two weeks of month end. Revenue, gross margin by channel, contribution after ads, EBITDA, cash. Every month, without being chased. If your accountant only talks to you at year end, you don't have an accountant, you have a filing service. We covered the difference in You've Outgrown Your Accountant.
2. A rolling cash forecast. Thirteen weeks minimum, and it must be tied to real stock commitments, not hope. The brands that die at £5m don't die from lack of sales. They die from a stock order placed in September that the January cash can't cover. Our cashflow guide shows the shape of it.
3. Stock and margin by SKU, by channel. Which product makes money on TikTok Shop and loses it on Amazon? You can't know unless the numbers are split. This is where most compliance-only accountants stop and most e commerce controllers earn their keep.
4. Reconciliation you can defend. Every marketplace settlement ties to the bank, every fee is explained. HMRC's platform reporting means the data is already with the taxman. It should be with your board too.
5. A finance person in the room for the big calls. The hire, the price rise, the new market, the funding round. Not a report after the fact, a voice before the decision. That's the difference between a function and a filing service, and it's the whole game.
The Tax Calendar Is Not Going to Get Easier
One more thing to price in. The compliance load is rising, not falling. Making Tax Digital for Income Tax went live in April 2026: sole traders and landlords with qualifying income over £50,000 must keep digital records and file quarterly updates, with the threshold dropping to £30,000 from April 2027 and £20,000 coming after. HMRC says more than 436,000 people have already filed their first quarterly update. If you built this brand as a sole trader, or you hold property personally, that regime is already on you.
It doesn't touch your limited company directly, but it sets the tone. Digital, quarterly, verified. That's the direction of travel for every return you file. The accounting that worked in 2021 is being legislated out of existence. The brands that thrive are the ones whose books are always ready to be looked at.
Frequently Asked Questions
At what revenue should I hire a financial controller?
There's no fixed rule, but £5m is where the complexity usually arrives: multi-channel settlements, multi-currency, stock funding, a team to manage. Below that, a good e commerce accountant with a management pack covers most of the function. Above it, you may genuinely need someone full-time in the building.
What's the difference between a financial controller and a management accountant?
Overlapping, but roughly: the management accountant builds the reports, the controller owns and acts on them. The controller runs cash, stock, controls and the banks. The management accountant is the analyst, the controller is the operator.
Can my existing accountant provide management accounts?
Ask them for a monthly pack within two weeks of month end, split by channel, with a cash forecast attached. Their answer tells you everything. Most compliance firms will say they can do it annually, or quarterly if pushed. That's not a management pack, that's a recap.
Is a financial controller the same as a CFO?
No. A controller runs the numbers day to day. A CFO owns strategy, fundraising, board reporting and the big calls. A controller is a cost centre that saves you money. A CFO is an investment that raises it. At £5m you usually need the first. At £20m you need both.
What should a £5m brand pay for good finance support?
A full-time controller costs £82,000 all-in before recruitment and software. A specialist e commerce accounting firm delivering the same function typically costs less, often much less, and scales down the month you don't need it. A hire doesn't scale down.
Summary: Buy the Function, Not the Title
Your accountant is not the problem. Your expectation of them is. They were hired to file, and they file. The gap at £5m isn't a compliance gap, it's a control gap: nobody in the building is watching cash, margin and stock month by month, and the tax bill arrives like a verdict instead of a forecast.
The fix isn't automatically an £82,000 hire. It's financial control, from whoever can actually deliver it, and the non-negotiables above are the test. If you're doing £1m to £20m across TikTok Shop, Amazon or Shopify and you're not sure whether your finance function is doing its job, that's exactly the conversation we should have. Book a call and we'll look at your real numbers, not a generic checklist. See how we help TikTok Shop sellers, run your numbers through our free tools, and read what we actually do for e commerce brands on our case studies page.