Vintro Pro Knowledge Base · Getting started

How to start a secondhand business without drowning in admin

From a passion for secondhand goods to a business with structure — before your stock catches up with you.

Which law? This page follows the Belgian rules. The Netherlands, France and the UK differ — you will find the comparison further down this page.

Almost every successful resale entrepreneur starts the same way: small.

🎪 Selling at antique or vintage markets 🪵 A passion for vintage furniture 🏺 A love of antiques 🚲 Or simply: a dream

You buy a few items, sell them at a profit, and get a taste for it. Stock grows, more customers come in — and it becomes a real business.

And that's exactly where the first problems tend to start.

The real challenge usually isn't selling

Many founders pour their energy into:

🔎 Finding products 🏷️ Setting prices 📣 Attracting customers 🛍️ Choosing sales channels

But far less attention goes to the organisation behind the scenes.

"What did I pay for this item? Where is it right now? Which goods actually make the most profit?"

Once those questions become hard to answer, you lose the overview.

How you actually start: registration, VAT number and the threshold

Before you sell a single piece, three things are already fixed: where you register, when you get a VAT number, and from what turnover you must charge VAT. All three differ per country, and the gap is wider than you would guess.

In Belgium it runs through an accredited business counter. You get a ten-digit company number in the Crossroads Bank for Enterprises, and that same number becomes your VAT number — but it has to be activated at the FOD Financiën before you begin trading. You will need NACE codes describing what you sell.

The turnover limit below which you charge no VAT runs from 20,000 euro in the Netherlands to 85,000 euro in France. That is more than four times as much. A dealer starting in the Netherlands lands in VAT far sooner than one starting in France — on identical turnover.

If you sell through an online platform, it often starts before that threshold: the platform reports your sales from 30 sales or about £1,700 a year. That is a report, not a tax bill — but it is the moment the question “am I trading?” gets asked. What that report means, and when you really are trading.

BE €25,000

Register at an accredited business counter (KBO). Your company number becomes your VAT number, and must be activated before you start.

NL €20,000

Register at the KVK, which passes you to the tax authority. Your VAT id follows within two weeks. The lowest threshold of the four.

FR €85,000

Everything through the INPI guichet unique: SIREN, SIRET and APE code. The VAT number is requested separately from the SIE.

UK £90,000

Register with HMRC for Self Assessment once you earn more than £1,000. VAT only starts at £90,000.

The large figure is the turnover limit below which you charge no VAT. Each anchor checked on 31 August 2026 with the authority itself: FOD Economie (KBO registration) and FOD Financiën (exemption scheme, €25,000); KVK and Belastingdienst (KOR, €20,000); INPI guichet unique and BOFiP BOI-TVA-DECLA-40-10-10, version 01/07/2026, CGI art. 293 B (€85,000, raised €93,500); gov.uk, Set up as a sole trader and VAT thresholds (£90,000).

⚠️ Be careful with what you read online about France. The much-discussed reform to a single €25,000 threshold has not taken effect: the BOFiP version of 1 July 2026 still holds 85,000 euro. Blogs quoting €25,000 are out of date.

Deliberately not covered here: the register obligation for second-hand goods — the opkopersregister, the livre de police, the stock book. That differs per country again and is explained separately in What belongs in your stock list?

One more obligation you meet later on is explained separately: whether the e-invoicing obligation touches you as a second-hand trader in Peppol e-invoicing: does it apply to you?

Secondhand goods are different from ordinary stock

A classic shop sells dozens of identical products. A secondhand business doesn't — almost every item is unique:

🪑 Vintage decor 🕰️ Antique furniture 📚 Books 🚲 Bicycles 🖼️ Artwork 🧿 Collectibles

So you need to track every item individually.

The biggest mistake founders make

Many entrepreneurs start with a spreadsheet, a notebook, loose photos on their phone, or paper labels. That works fine when you have twenty or thirty items.

But what happens once your stock grows?

100items — searching gets harder
500items — overview starts to slip
1,000items — admin takes more time than selling
📷 Photos go missing 💸 Purchase price forgotten 🔍 Can't find products again

Think in processes, not products

Every item goes through the same lifecycle.

STEP 1

Intake

An item comes in.

STEP 2

Registration

It gets a unique identity.

STEP 3

Photography

Photos are linked to the item.

STEP 4

Valuation

Purchase and sale price are recorded.

STEP 5

Storage

The item gets a fixed location.

STEP 6

Sale

The sale is recorded.

STEP 7

Analysis

You gain insight into revenue, margins and stock.

RESULT

Overview

Businesses that master this process grow more easily.

Why inventory management matters from day one

Many founders think: "We'll sort that out later." But later is often too late.

💸 Forgotten purchase prices 📷 Missing photos 🕵️ Lost items 📉 Unclear margins

Good structure from day one prevents a lot of frustration.

Admin isn't a necessary evil

Good record-keeping isn't administrative overhead — it's management data:

📈 Best-selling categories 🐌 Items sitting too long 💰 Profit per product 📍 Where your stock is 🏦 Capital tied up in stock

One piece of admin stopped being optional in Belgium: since 1 January 2026 an invoice to a Belgian trade colleague has to go electronically through Peppol — with no turnover threshold below which you are exempt. To a private buyer it is not required. What e-invoicing actually asks of you.

How does Vintro Pro help?

Everything above — knowing what you bought, where it is, how fast it sells and what the tax office expects of you — is exactly what this app was built for. Not a tool alongside your shop, but the place where your stock lives.

✅ Every piece separately, with photo and purchase price ✅ Label printing ✅ Purchase proof per piece ✅ Margin VAT overview per period ✅ Export to Vinted, 2dehands, Whoppah and Catawiki

How to start in the app: you add your first item with ➕, print a label for it, then try scanning at the point of sale. Those three steps appear as a starter list on your screen as soon as you have an account. From there the 📈 Dashboard tab fills up with your own figures on its own.

The Vintro Pro vision

Successful resale entrepreneurs don't manage chaos — they manage processes.

They know what they buy, where it is, and how fast it sells. That leaves more time for what really matters: helping customers and growing the business.

Need help organising your secondhand business?

Vintro Pro combines smart inventory software with personal guidance for entrepreneurs who want more oversight of their stock, admin, and processes.

Frequently asked questions

Do I need a VAT number to start a second-hand business?

In Belgium you register through an accredited business counter. You receive a ten-digit company number in the CBE, and that number becomes your VAT number — but it has to be activated with the FPS Finance before you start trading.

From what turnover do I have to charge VAT?

It differs sharply per country: 25,000 euro in Belgium, 20,000 euro in the Netherlands, 85,000 euro in France and £90,000 in the United Kingdom. Every figure was checked against the government itself on 31 August 2026.

When does an online platform report my sales to the tax office?

From 30 sales or 2,000 euro a year. That is a DAC7 report, not an assessment — but it is the moment the question of whether you are a trader gets asked.

Is France really moving to a single threshold of 25,000 euro?

No. That reform did not come into force: the BOFiP version of 1 July 2026 keeps 85,000 euro. Blogs reporting 25,000 euro are out of date.

When does Excel become too small for my stock?

Around a hundred items searching gets awkward, around five hundred the overview disappears, and around a thousand the admin costs more time than the selling itself.