To start dealing watches in the UK you need trading capital you can afford to have tied up for months, a registered business (sole trader with HMRC or a limited company), a per-item stock book from the first purchase so you can use the VAT margin scheme when you cross the £90,000 registration threshold, a decision about cash - accepting £10,000 or more in cash for goods makes you a High Value Dealer who must register with HMRC before taking it - a serial-number check and photographed ID on every watch you buy, insurance that actually covers stock and transit, and one selling channel whose fees you have modelled. Nothing on that list is optional; the order is roughly the order below.

How much capital do I actually need?

Enough to hold stock without needing to sell it this week. A dealer who must sell to pay next month's bills prices to move, and pricing to move is where the margin goes.

The arithmetic is simple. Decide your average purchase price and how many pieces you want available at once. Six watches at £4,000 is £24,000 in stock; add a float for the next opportunity, a servicing reserve and three months of fixed costs. Most people starting part-time begin smaller - two or three pieces in the £1,500 to £5,000 band, where the deepest buyer pool sits - and recycle the same capital.

What kills new dealers is not one bad watch; it is capital stuck in four slow watches while the fifth opportunity walks past. The number to watch from day one is how many days each piece sits. We cover pricing against the market in how to price a pre-owned watch.

Do I need to register anything before I buy my first watch?

Registration When Where
Self-employment (sole trader) Once you are trading with a view to profit, and in any case by 5 October after the end of the tax year in which you started HMRC, Self Assessment
Limited company Optional; common once stock value or liability makes it worth it Companies House
VAT When taxable turnover in any rolling 12 months exceeds £90,000 - and for a margin-scheme dealer the full selling price of each watch counts towards that, not the margin HMRC
High Value Dealer (Money Laundering Regulations) Before you accept or make a cash payment of £10,000 or more for goods, in one go or in linked payments HMRC, £300 application plus £400 per premises
Data protection fee If you hold customer personal data (you will) ICO, unless exempt

Two of those catch people out. The VAT threshold is hit far sooner than new dealers expect, because it is measured on turnover, not profit - twenty watches at £5,000 is £100,000 of taxable turnover even if you made £400 on each. And the High Value Dealer registration has to be in place before the cash is on the counter, not after - HMRC's guidance says register "straight away" if you decide you will accept such payments. The £10,000 figure is sterling, in force since 30 June 2026; it replaced the old €10,000 test.

How does VAT work for a watch dealer?

Until you are VAT registered, you charge none and reclaim none. Once registered, the second-hand margin scheme in VAT Notice 718 lets you account for VAT on the margin rather than the full price of a watch you bought without recoverable VAT - from a private seller, at auction on the hammer, in part-exchange, or from another dealer under the scheme. The VAT is one sixth of the margin (paragraph 3.3). Buy at £7,500, sell at £9,000, and the VAT is £250, not £1,500.

The price of that concession is the stock book: one record per watch with the stock number, purchase and sale dates and invoice numbers, both parties' names, description, prices, margin and VAT (paragraph 5.2), kept six years, with the sales invoice showing no separate VAT and the words "Margin scheme - second-hand goods". If HMRC cannot verify your margins from your records, VAT is due on the full selling price (paragraph 5.1). Start the stock book before you are registered; reconstructing eighteen months of purchases from WhatsApp threads is the most common avoidable mess in this trade. Full detail in what the VAT margin scheme means for second-hand watches and margin scheme stock book requirements.

Two more VAT points. Watches you buy from a VAT-registered dealer on a normal VAT invoice are outside the margin scheme for that piece - you reclaim the input VAT and charge output VAT on the full sale. And general accounting software does not handle any of this natively; see accounting software for watch dealers.

Where do dealers actually source watches?

Five places, in rough order of how a new dealer encounters them.

Private sellers. The core of the trade. Collectors selling to fund the next piece, estates, people who need money. You compete with Watchfinder-type buyers and with the owner's option of selling it themselves on Chrono24 at 6.5% commission, so your offer has to be explainable: fast, certain, no returns, cash in the bank in a day.

Part-exchange. Once you have sold a few watches you will be offered others against them. Part-exchange stock is bought at your valuation from a motivated seller, and it arrives without a sourcing cost. It is also where most undisclosed-fault and wrong-title risk arrives.

Auction. Fellows (Birmingham and London), Bonhams, Sotheby's and the regional rooms. You pay the hammer plus buyer's premium - Bonhams' UK premium is 28% on the first £40,000 of hammer, plus VAT on the premium - so the hammer has to be well under trade value. Auction purchases are margin-scheme eligible, and the auction house's invoice is your purchase record.

Trade. Other dealers, WhatsApp groups, trade-only platforms. Thin margins, fast turnover, the place to fill a specific request rather than to build stock.

Marketplaces as a source. Private listings on Chrono24 and eBay. Occasionally useful; rarely the cheapest route.

Whatever the source, the purchase record is the same: seller's name and address, photographed ID, serial number, price, date, photographs of the watch and papers, and the theft-database result.

How do I avoid buying a stolen or fake watch?

Buying in good faith does not give you title to a stolen watch. The original owner can reclaim it and you lose both the watch and the money you paid. So before any money moves:

  1. Search the serial against The Watch Register, the largest commercial database of lost and stolen watches. A single search is £16 and bulk rates start at £2.00 per watch, both ex VAT, with a PDF certificate on a clear result.
  2. Photograph the seller's ID at the point of purchase and keep it with the record. You need customer due diligence records anyway once cash is involved.
  3. Check the watch physically and on paper - case, movement, serial and reference, box and papers against the watch. What to check, and the authentication services that exist, is in how to authenticate a watch.
  4. Hold funds until the result is back. A seller who will not wait fifteen minutes for a database check is telling you something.

Full process in how to check if a watch is stolen. Do it on every watch, including the ones from people you like.

What insurance does a watch dealer need?

At minimum: stock cover at the premises, stock in transit (the post and the courier are where watches disappear), and public liability. If you take in customers' watches for servicing or on consignment you also need cover for goods in trust, which a standard shop policy frequently excludes - see is customer jewellery insured in my workshop. Specialist jewellers' block policies exist for exactly this trade; the insurer will want to know your stock limit, your safe rating, your alarm and how you send watches. Home insurance will not cover a dealing stock held at home, whatever the schedule says about personal jewellery. Get this in place before the first watch arrives, not after.

Which selling channel should I start with?

One you understand, and whose fees you have put into a spreadsheet against a real watch. Figures below are as of August 2026; the full comparison, including auction and dealer-to-dealer routes, is in best place to sell a watch in the UK.

Channel What it costs a UK business seller Who buys there
eBay (business account) Final value fee in Watches, Parts & Accessories of 12.9% up to £750 per item and 3% on the portion above £750, plus £0.40 per order and a 0.35% regulatory operating fee, all ex VAT; Authenticity Guarantee via Stoll & Co. on watches sold at £1,500 and over, at no cost to the seller Broad UK and international retail, price-sensitive
Chrono24 (dealer) Monthly package from €199 for up to 25 listings on the last published table, plus a per-sale commission that Chrono24 does not publish - see what Chrono24 costs a dealer Global luxury-watch buyers; the deepest audience for Swiss pieces
Your own site Platform and payment fees only Repeat customers and referrals; slow to build
Trade Thin margin, no fees Other dealers filling requests

Do not sell as a private individual on eBay or Chrono24 once you are trading. The private-seller terms are for private sellers, and trading under them is a misdescription with consumer-law consequences. As a business seller you are also bound by distance-selling rights, including the 14-day cancellation period for online sales, which belongs in your pricing model.

The first ten watches

A plan that survives contact with the market:

  • Watches one to three: references you already know well, in the £1,500 to £5,000 band, bought from private sellers or at auction, sold on eBay with Authenticity Guarantee or to trade. The aim is to get the purchase record, the stock book, the photographs and the despatch process working, not to make money.
  • Watches four to six: start taking part-exchange. Record the part-exchange value as the purchase price in the stock book; it is a purchase for margin-scheme purposes.
  • Watches seven to ten: decide whether Chrono24's dealer package pays for itself at your volume. At €199 a month it needs to sell you roughly one extra watch a quarter at a normal margin to break even; model it before you sign.
  • Throughout: days in stock per piece, written down. If a watch is still there after ninety days, it is priced wrong or bought wrong, and both are information.

By watch ten you should know your average margin, your average days to sell, which channel your buyers came from, and whether you are within a year of the £90,000 VAT threshold. Those four numbers decide whether this is a hobby, a side business or a business.

What we could not verify

  • Watchfinder, Subdial and other buyers' current offer levels against trade value. Not published; they depend on the piece. Get three quotes on a real watch before you assume your sourcing margin.
  • Chrono24's dealer commission and whether the September 2024 package table is current. Not published. Ask in writing.
  • Typical jewellers' block premiums for a start-up stock limit. Not published; broker-quoted.
  • Auction buyer's premiums other than Bonhams'. Fellows and Sotheby's publish theirs, but rates and bands change; check the sale's terms.

Sources

This is general information, not legal, tax or financial advice. Thresholds and fees change, and your position depends on your own facts. Check the GOV.UK pages linked above and take advice from an accountant before you register, and from an insurance broker before you hold stock.

Milleso is built for exactly this sequence: every watch is a serialised record with its all-in cost and VAT treatment decided at intake, the AML file and theft check sit on the purchase, cash is totted towards the £10,000 line per customer, and the stock book, invoices and Xero or Sage export come out of the same record - so the first ten watches are kept the way HMRC will eventually ask to see them.