Differenzbesteuerung (§ 25a UStG) for watch dealers

Most pre-owned watches in Germany are sold under § 25a UStG, the margin scheme. If you trade watches professionally and you have bought from a private seller, another § 25a dealer, or a non-VAT business, you are almost certainly operating under it. The rules are not optional, and the consequences of getting them wrong run from awkward to expensive.

This guide is for working dealers, not tax advisors. It covers the practical questions: when the scheme applies, how the VAT calculation actually works, what your invoice has to say (and what it cannot say), and the mistakes we see new dealers make repeatedly.

What § 25a actually does

Standard German VAT (Regelbesteuerung) is calculated on the full sale price. § 25a Differenzbesteuerung calculates VAT only on the margin, the difference between what you paid for the watch and what you sold it for.

The benefit is obvious. A used Rolex you bought from a private seller for €8,500 and sold for €9,500 has a €1,000 margin. Under Regelbesteuerung, you would owe VAT on the full €9,500. Under § 25a, you owe VAT only on the margin, calculated as a gross figure (so you back out the VAT from the €1,000): roughly €160 of VAT instead of €1,520.

When the scheme applies

§ 25a applies when all of these are true:

• You are a dealer (gewerblicher Wiederverkäufer) regularly buying and selling watches in your own name.
• The watch was acquired in the EU.
• The seller you bought from did not (or could not) charge VAT to you: a private individual, another § 25a dealer, a tax-exempt business, or a Kleinunternehmer under § 19.

If the watch came with a VAT-deductible invoice from a regular VAT business, you are in Regelbesteuerung territory for that piece.

The invoice rules

A § 25a invoice has specific requirements and prohibitions.

• No VAT line. You do not show separate VAT. The total is the total.
• Legal note required. You must state that the margin scheme applies, e.g. "Gebrauchtgegenstände / Sonderregelung" or "Differenzbesteuerung gemäß § 25a UStG".
• No VAT deduction for the buyer. Your customer cannot claim input VAT from your invoice. This is the trade-off they accept for the lower total.

If you accidentally print VAT on a § 25a invoice, you owe it to the tax office regardless. Storno and reissue, but the audit trail matters.

How ChronoDesk handles it

The scheme is decided once, at purchase, on the watch object itself. Every downstream document (Ankaufsrechnung, sale invoice, Storno) inherits that decision. The legal note appears automatically. The VAT calculation runs on the margin. Your DATEV monthly export lists margin-scheme transactions in their correct accounts.

The mistakes that get expensive

We see four patterns repeatedly.

• Mixing schemes mid-watch. You bought as private (so § 25a) but then put a service through with VAT on the invoice. The service VAT does not unlock Regelbesteuerung for the watch. You cannot deduct it.
• Forgetting the legal note. Invoices missing the required text are formally defective. A buyer can request reissue, and an audit will flag the omission.
• Not separating the income streams in your books. § 25a and standard VAT transactions land in different DATEV accounts. Lumping them is a reconciliation nightmare at year-end.
• Re-importing without paperwork. A § 25a watch that leaves the EU and returns needs careful documentation, otherwise the scheme can break.

The practical takeaway

If you trade watches in Germany, you spend more time in § 25a than in any other VAT mode. Get it correct at the purchase step and the rest takes care of itself. Get it wrong at the purchase step and you are cleaning it up for years.

For dealers running through ChronoDesk: the scheme picker is the very first field on a new watch. It is not optional, and it is not in the small print. That choice carries forward to every invoice you will ever cut for that piece.

Two specific guides are coming next: when to use § 13b reverse charge for B2B transactions, and how to handle exports under § 4. Both are easier than they look once you have internalised § 25a.