At some point, every UK Amazon seller hits the same wall. Sales are ticking up, VAT registration looms or has already happened, and the spreadsheet you built in month two has turned into a monster nobody wants to touch. That’s usually when “I should probably get an accountant” starts crossing your mind on a weekly basis.
The trouble is that hiring the wrong one is expensive in ways that don’t show up immediately. I’ve seen sellers pay £150 a month to a generalist who didn’t understand FBA inventory accounting, only to discover eighteen months later that their COGS had been calculated wrong the entire time. Others went the opposite direction, paying premium rates for services they never actually needed as a sole trader doing £60k a year.
So here’s what actually matters when you’re picking an Amazon Accountant UK sellers can rely on, rather than someone who happens to also do tax returns.
Ask If They Actually Understand Amazon’s Reports
This sounds obvious, but it filters out most general practice accountants immediately. Amazon’s settlement reports are not intuitive. Between FBA fees, referral fees, storage costs, reimbursements, and currency conversion on international sales, a seller’s actual profit can look wildly different from what’s sitting in their bank account on any given day.
A good accountant should be able to explain, without hesitation, the difference between your Amazon payout and your actual revenue. If they’re nodding along vaguely or asking you to just “send over the bank statements,” that’s a signal they’re going to treat your Amazon business like a normal retail shop, and the numbers will end up wrong.
Ask them directly: how do you handle inventory valuation for FBA stock sitting in Amazon’s warehouses? If they can’t answer that in plain English, keep looking.
VAT Experience Isn’t Optional
This is where most horror stories start. UK VAT rules for Amazon sellers get complicated fast, particularly once you’re storing inventory in Amazon’s EU fulfillment centers or selling across borders. Distance selling thresholds, the VAT treatment of Amazon’s own fees, and the different rules that apply depending on whether Amazon is acting as the deemed supplier — none of this is standard fare for a high street accountant who mostly handles local trades and small retailers.
I’d go as far as saying VAT competence is the single biggest differentiator between a generic accountant and a proper Amazon accountant UK sellers should actually hire. Get this wrong and HMRC notices tend to show up twelve to eighteen months later, by which point the errors have compounded across several VAT return periods.
Fixed Fee vs Percentage-Based Pricing
Some accountants charge a flat monthly fee. Others charge based on your revenue, sometimes as a percentage. There’s no universally right answer here, but you need to understand which model you’re walking into and whether it scales sensibly as your business grows.
A percentage-based fee can look reasonable at £2,000 a month in revenue and then become genuinely painful once you’re doing £30,000 a month, even though the actual bookkeeping work hasn’t gotten ten times harder. Ask what happens to your fee as sales increase. If they can’t give you a straight answer, that’s worth noting.
Fixed fees are usually more predictable, but check what’s actually included. Some firms quote a low monthly rate and then bill separately for VAT returns, year-end accounts, and self-assessment, so the real cost ends up higher than it first appeared.
Software Compatibility Matters More Than People Think
Most decent Amazon-focused accountants will use something like A2X or Link My Books to pull settlement data into Xero or QuickBooks automatically. This isn’t a nice-to-have. Manual reconciliation of Amazon transactions is genuinely painful and error-prone, and an accountant still doing it by hand in 2026 is either charging you for hours that shouldn’t exist or making mistakes that a proper integration would catch automatically.
Ask what software stack they use. If the answer involves spreadsheets and manually copying numbers from Seller Central, that’s a red flag regardless of how nice they seem on the phone.
Check Whether They’ve Actually Worked With Sellers at Your Stage
An accountant who’s brilliant for a seller doing £500k a year might be overkill, and overpriced, for someone doing £40k. Conversely, someone used to handling small sole traders might be genuinely out of their depth once you’re VAT registered, running PPC campaigns across multiple marketplaces, and dealing with inventory across several fulfillment centers.
Ask for a rough sense of the size of clients they typically work with. It’s not about finding the most experienced person in the abstract — it’s about finding someone whose typical client looks roughly like your business right now, and ideally where you’re headed in the next year or two.
Don’t Just Go With the Cheapest Quote
I get the instinct. When you’re bootstrapping a business, £300 a month feels like a lot to hand over for something you could theoretically do yourself with enough YouTube videos and swearing. But the sellers I’ve seen get burned worst weren’t the ones who overpaid. They were the ones who went with whoever quoted the lowest price, got someone unfamiliar with marketplace accounting, and spent far more later fixing VAT errors or amending incorrect returns.
The right price isn’t the lowest one. It’s the one that matches the actual complexity of your business without paying for services you don’t need yet.
The Bottom Line
Picking the right accountant isn’t really about credentials or how polished their website looks. It’s about whether they’ve actually handled the specific mess that comes with Amazon selling — the fee structures, the VAT complexity, the inventory quirks — enough times to spot problems before they become expensive ones. A proper Amazon Accountant UK sellers trust with their numbers should be able to talk fluently about all of this in a first conversation, without you having to explain what a settlement report is.