Knowledge Base

Practical articles on inventory management, margins, and admin — written for antique and secondhand dealers.

Looking for how to use the app itself? → To the guide

Rather try it yourself first? → To the demo

Rather news than explanation? → Found in the press

Looking for the tax office, an auction house or a fair? → Useful links by country

Need a quick answer?

58 short questions, each at its own address — with the source and the date it was checked. The long version is in the articles below.

VAT and margin

The margin scheme, imports, and what happens to VAT when you buy or sell across a border.

Stock and method

What you record per piece, how your stock turns over, and when a spreadsheet stops being enough.

Starting out and earning

Starting a second-hand business, and what you need to turn over to live on it — country by country.

Rules and admin

Obligations that are not about VAT: reporting to the tax office, e-invoicing, and trading at markets.

DAC7: when do you become a trader?

Your platform reports you from 30 sales or about £1,700. That is a report, not a tax bill — and here is where the line really runs.

Peppol e-invoicing: does it apply to you?

Belgian law since January 2026 — but only between businesses. Selling to a private buyer falls outside it; selling to a colleague does not.

Can you trade at an antiques market as a dealer?

Two countries scrapped their permit, France wants a four-year card and the UK a licence from each council.

Can a private seller sell to a dealer?

Yes — and that sale is what makes the margin scheme possible. Which purchase record each of the four countries asks for.

Do you have to take stock once a year?

In four countries it is written into law. What to count, at what value, and why your asking price does not belong in it.

Stock management for a second-hand shop: the complete guide

The whole chain in one guide: from numbering the piece to the VAT return. Seven links, four countries, with a calculator.

What belongs on the label of a unique piece?

In the UK antiques are exempt from price marking. What still belongs on a label, and how big a QR code has to be to scan.

When is Vintro Pro not right for you?

Four times you do not need us, with the reason. A comparison in which we win everywhere convinces nobody.

When does an antique dealer fall under money laundering rules?

Two thresholds that get confused: 10,000 euros makes you regulated, 3,000 euros caps cash. With a calculator per country.

Can a dealer claim work clothing as a business expense?

A dust coat yes, a suit for the fair nowhere, and a sweater with your logo only in the Netherlands. Country by country, from the rules.

What guarantee do you owe on a second-hand piece?

No fixed period in the UK and the Netherlands, two years in Belgium and France. And who has to prove the fault was there? Country by country, from the statute.

Frequently asked questions

What is in the Vintro Pro knowledge base?

Practical articles on margin VAT, margin scheme goods, stock management, importing and exporting after Brexit, and starting a second-hand business — written from the daily practice of an antique business.

Do the articles apply outside Belgium?

The articles cover Belgium, the Netherlands, France and the United Kingdom. Wherever the rule differs per country, that difference is spelled out.

Are the articles tax advice?

No. They explain how the rules work and point to the source, but they do not replace your accountant.

Are the articles kept up to date?

Yes. Every figure is checked against the government source itself, with the date of that check alongside it, and an article is updated as soon as a rule changes.

Does the knowledge base cost anything?

No. Every article is free to read, without an account.