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Winkel Factuur Blog

Expert tips, guides and best practices for e-commerce automation, invoicing and multichannel selling via Shopify, WooCommerce, bol.com and Amazon.

Taxation

Dutch VAT Guide for International Sellers: Rates, Registration, and Rules

Selling into the Netherlands from abroad? Dutch VAT (BTW -- Belasting over de Toegevoegde Waarde) is one of the first hurdles international sellers face. Whether you sell via your own webshop, through marketplaces like bol.com or Amazon.nl, or provide services to Dutch businesses, you need to understand the VAT rates, registration requirements, OSS scheme, and filing obligations. This guide covers everything an international seller needs to know about Dutch VAT in 2026.

14 min
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E-invoicing

PDF to UBL Conversion: The Complete Guide to E-Invoicing Compliance

Still sending invoices as PDF attachments? Across the European Union, e-invoicing mandates are accelerating fast. UBL (Universal Business Language) is the structured XML format that governments and large enterprises now require. This guide walks you through everything: what UBL is, why it matters, how the EU e-invoicing landscape is evolving, and exactly how to convert your existing PDF invoices to UBL format -- including a free converter tool you can use right now.

12 min
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Compliance

Required Invoice Information: Complete Checklist for Legally Valid Invoices

A correct invoice is not just a payment request; it's a legal document that must meet specific requirements. Missing or incorrect information can lead to rejected invoices, VAT that cannot be reclaimed, and even fines. In this article, we give you a complete checklist of required invoice data and explain how our free tools help you comply with all regulations.

9 min
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Practical Tools

IBAN Validation: Prevent Payment Problems with Our Free IBAN Checker

An incorrect IBAN number on your invoice can lead to failed payments, delays, and frustration. With an IBAN validator, you can quickly check whether an account number is correct. In this article, we explain how IBAN works, what can go wrong, and how to use our free IBAN checker to prevent problems.

7 min
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E-invoicing

UBL Invoices: Complete Guide to PDF to UBL and UBL to PDF Conversion

E-invoicing is becoming increasingly important in business. UBL (Universal Business Language) is THE standard for electronic invoices. In this guide, we explain what UBL is, how to convert PDF invoices to UBL, how to convert UBL files to readable PDFs, and how to validate UBL invoices. With our free tools, you can get started quickly.

10 min
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Guides

Free Invoice Generator: Complete Guide to Creating Professional Invoices

Creating professional invoices doesn't have to be complicated or expensive. With the right online tools, you can generate a correct, legally compliant invoice within minutes. In this guide, we explain step by step how to create free invoices online, what information is required, and how our free tools can help you.

12 min
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Amazon

Amazon FBA and VAT: A Survival Guide for Sellers

Selling via Amazon FBA (Fulfillment by Amazon) is a great way to reach all of Europe. You send your stock to Amazon and they handle the rest. But fiscally, it is a minefield. As soon as your stock is abroad, you immediately have to deal with local VAT rules. In this guide, we explain what you need to look out for.

10 min
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WooCommerce

The Best WooCommerce Invoice Plugin for 2026: Automate Your Administration

WooCommerce is a fantastic platform, but the default invoicing options are limited. You want professional PDF invoices that meet tax authority requirements, are sent automatically, and land directly in your accounting. In this article, we compare the options and show why Winkel Factuur is the smartest choice for serious webshops.

8 min
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Dropshipping

Dropshipping and VAT: A Complete Guide for E-commerce Sellers

Dropshipping is a popular business model: you sell products via your webshop (e.g., Shopify), but the supplier (often in China via AliExpress or Oberlo) ships the package directly to the customer. You don't need inventory and run little risk. But fiscally, dropshipping is complex. What about VAT? Who pays import duties? And how do you create a correct invoice? In this article, we explain it in detail.

9 min
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Shopify

Shopify Costs 2026: A Complete Overview of Prices and Rates

Shopify is one of the most popular e-commerce platforms in the world, but what does it really cost to run a Shopify webshop? Besides the monthly subscription costs, there are transaction fees, app costs, and costs for themes. In this article, we list all the costs so you won't face any surprises.

9 min
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FAQ

Invoicing FAQ: The Answers You Are Looking For

There are many questions and misunderstandings about invoices. Do I always have a right to an invoice as a consumer? What should I do if a company does not send an invoice? And how long can I wait to pay? In this article, we answer the 15 most frequently asked questions about invoicing, for both entrepreneurs and consumers.

8 min
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Guides

How to Make an Invoice: Everything You Need to Know

As an entrepreneur, you want to get paid for your work. A correct invoice is the foundation for this. But how do you create an invoice that meets all regulations? In this complete guide, we explain step-by-step how to create a professional invoice, what details are mandatory, and how to automate this process.

10 min
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Automation

E-commerce Automation: The Complete Guide to Smarter Webshops

Successful e-commerce entrepreneurs have one thing in common: they automate everything they can. While you're manually processing orders, creating invoices, and tracking inventory, your competitors are scaling effortlessly. In this comprehensive guide, you'll learn which e-commerce processes you can automate, which tools you need, and how to start automating today.

15 min
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Invoicing

Automatic Invoicing: Why Smart Webshops Automate Their Invoicing

Creating invoices manually is time-consuming, error-prone, and frankly: a waste of your time. Yet many webshop entrepreneurs still do it themselves. In this article, we explain why automatic invoicing is a game-changer for your e-commerce business, how much time you can save, and how you can start automating today.

10 min
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bol.com Tips

bol.com Buy Box Guide: The Complete Guide to Selling More

The buy box (koopblok) on bol.com is the holy grail for every seller. Whoever has the buy box gets the most sales. But how does it work exactly? And more importantly: how do you make sure you win the buy box? In this comprehensive guide, we explain everything about the bol.com buy box, from basic principles to advanced strategies to beat your competitors.

11 min
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Integrations

Accounting Integrations for E-commerce: The Complete Guide to Twinfield, Exact Online & AFAS

As an e-commerce entrepreneur, you know how time-consuming manual accounting can be. Entering each order separately, checking VAT percentages, matching invoices with payments... it costs hours per week. Fortunately, accounting integrations exist that automate this. In this comprehensive guide, we explain which integrations are available, how to set them up, and which one best fits your situation.

14 min
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Integrations

Shopify bol.com Integration: The Complete Guide to Multi-Channel Selling

Are you selling on Shopify and want to expand to bol.com? Or are you already on both platforms but want to automate your processes? In this comprehensive guide, we explain step-by-step how to connect your Shopify store to bol.com, which tools you need, and how to automatically sync inventory, orders, and invoices.

12 min
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bol.com

Optimally Manage Your bol.com Store: From Setup to Automation

Do you sell via bol.com or are you considering starting as a seller? This complete guide helps you manage your bol.com store professionally, from product uploads to automated invoicing and integration with your own webshop. Discover how Winkel Factuur, with direct bol.com API integration, helps you save time and prevent errors.

8 min
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Software Reviews

Compare Invoicing Software: Which Fits Your Webshop Best?

Looking for the best invoicing software for your webshop or marketplace? This complete comparison guide helps you make the right choice between free tools, paid solutions, and enterprise platforms – with a focus on e-commerce integrations.

10 min
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Technology

What is UBL? Everything about UBL Invoices and Electronic Invoicing

UBL (Universal Business Language) is an international standard for electronic invoices. More and more companies and governments require UBL invoices. But what exactly is UBL, when is it mandatory, and how do you create a UBL invoice? This complete guide explains everything.

9 min
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Taxation

What is VAT? Complete Guide to Value Added Tax

VAT (Value Added Tax) is one of the most important taxes for businesses. But what exactly is VAT, how does it work, and what are your obligations as an entrepreneur? This comprehensive guide explains everything you need to know about VAT.

10 min
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Basics

What is an Invoice? Everything You Need to Know

An invoice is one of the most important documents for any business. But what exactly is an invoice, what must be on it, and when should you issue one? This complete guide explains everything you need to know about invoices.

8 min
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