Electronic commerce between companies (B2B e-commerce) has established itself as a strategic tool to optimise sales processes, reduce operating costs and expand commercial reach. However, unlike e-commerce aimed at the final consumer (B2C), B2B has specific characteristics that companies must be aware of, especially with regard to their tax, accounting and regulatory obligations. In this article we explain what defines B2B e-commerce and what legal and tax aspects you should take into account if you manage or are thinking about implementing a platform of this type.
What is B2B e-commerce?
B2B e-commerce (Business-to-Business) is the process of selling products or services between two companies through digital channels. Unlike the B2C model, where it is sold directly to the final consumer, in the B2B Transactions are carried out between manufacturers, wholesalers, distributors or service providers.
For example, an electronic components manufacturer that sells to other manufacturing companies, or a wholesale distributor that supplies office supplies to companies, operate under a B2B model. By digitizing these sales through online platforms, companies can automate orders, offer self-service to their corporate clients and free up valuable time of their sales teams for more strategic tasks.
Main characteristics of B2B e-commerce
B2B e-commerce differs from B2C in several fundamental aspects that determine both its operational functioning and its tax obligations:
Order volume and complexity
B2B transactions typically involve high-volume orders that can include hundreds or thousands of products and reach significant values. This requires robust technological systems capable of managing complex orders, large inventories and sophisticated logistics processes.
Negotiated prices and conditions
Unlike B2C, where prices are uniform for all consumers, in B2B it is common for each corporate client to have specific negotiated prices, volume discounts, particular payment conditions and personalised catalogs according to previous commercial agreements.
Longer purchasing cycle
B2B purchasing decisions involve multiple people within the buying organisation, require internal approvals and more extensive evaluation processes. The cycle from first contact to closing the sale is usually considerably longer than in B2C.
Long-lasting business relationships
B2B e-commerce is based on long-term business relationships with recurring customers. Buying companies place repetitive orders, which makes it essential to offer personalised shopping experiences and functionalities such as quick order repetition or favorite management.
Integration with business systems
B2B platforms must integrate with ERP, CRM, and accounting systems to automate order, billing, inventory, and customer relationship management. This integration is critical to avoid manual errors and ensure operational efficiency.
Tax obligations of B2B e-commerce in Spain
One of the most complex aspects of B2B e-commerce is compliance with tax obligations, which vary significantly depending on the customer's location and the type of operation.
Value Added Tax (VAT)
VAT is the tax that generates the most complexity in B2B e-commerce, especially in cross-border operations:
- Sales within Spain: The corresponding VAT applies (21%, 10% or 4% depending on the product). The selling company acts as tax collector and must submit form 303 quarterly and form 390 annually.
- B2B intra-community sales: When selling to companies in other EU countries, it is essential to check if the customer is registered as an intra-EU operator. If it is, the operation is invoiced without VAT through the mechanism of reversal of the passive subject (the buyer pays VAT in his country). To do this, the seller must be registered in the Registry of Intra-Community Operators (ROI) and present form 349.
- Sales to countries outside the EU: Exports are exempt from VAT, but require appropriate customs documentation.
Special regimes: OSS and IOSS
Although these regimes were primarily designed for B2C operations, B2B companies that also make sales to end consumers in other EU countries should be aware of them:
- OSS (One-Stop Shop): It allows you to declare VAT on B2C sales in other Member States using a single quarterly declaration (form 369).
- IOSS (Import One-Stop Shop): Facilitates the collection of VAT on low value imports (up to €150).
Corporate Tax or Personal Income Tax
Depending on the legal form adopted, B2B e-commerce must pay taxes on its benefits:
- Commercial companies: Corporate tax at 25%
- Self-employed: Personal income tax according to progressive sections
Mandatory electronic billing
Since 2024, electronic invoicing is mandatory for B2B operations in Spain when they exceed certain thresholds. B2B e-commerce systems must generate invoices in structured format (PDF is not enough), guarantee their inalterability and allow complete traceability of the cycle: order, invoice, acceptance and payment.
Failure to comply with these requirements may result in administrative sanctions and blocks to contract with the public sector.
Regulations applicable to B2B e-commerce
In addition to tax obligations, B2B platforms must comply with a specific regulatory framework:
Information Society Services Law (LSSI)
The LSSI regulates all commercial activities carried out on the Internet for profit. B2B companies must:
- Include complete identification on the website (company name, address, NIF)
- Show prices transparently (indicating whether they include VAT)
- Provide clear and accessible general contracting conditions
- Confirm purchases made
General Data Protection Regulation (GDPR)
There is a myth that corporate data is not protected by the GDPR. This is false. An email like nombre.apellido@empresa.com identifies a natural person and activates the obligations of the GDPR:
- Informed consent for the use of cookies and analytics
- Clear legal basis for the processing of business contact data
- Information about using AI for customer scoring or dynamic pricing
- Response procedures for the exercise of ARCO rights
lDigital Services Act (DSA)
If your B2B platform hosts third-party products, displays rankings, or uses recommendation algorithms, you must comply with the DSA:
- Clear process for reporting illegal content or errors
- Transparency in product ordering criteria
- Seller Verification (KYBC: Know Your Business Customer)
Advantages of B2B e-commerce for your company
Despite its tax and regulatory complexity, implementing a B2B platform offers significant benefits:
- Reduction of operating costs: Automating orders and reps frees up sales team time for higher-value tasks.
- Scalability: You can serve more clients simultaneously without proportionally increasing the workforce.
- Improved customer experience: 24/7 self-service allows customers to check availability, place orders and track without depending on business hours.
- Data to make better decisions: Digital platforms generate valuable information about purchasing behavior, preferences and trends.
- Facilitated geographic expansion: It is easier to reach new markets without the need for a physical presence.
Key technological aspects in B2B e-commerce
For a B2B e-commerce to function correctly from a tax and operational point of view, it must incorporate:
- Integration with ERP and accounting systems: To automate the generation of structured invoices and synchronize inventories.
- Automatic verification of intra-community operators: Real-time query with VIES systems to determine if VAT applies.
- Automatic VAT calculation according to client and product: Considering location, type of client (company/individual) and nature of the product.
- Management of multiple prices and conditions: Catalogs personalised by client with their negotiated conditions.
- Complete traceability: From order to payment, through billing and shipping.
Trust specialised advice for your B2B e-commerce
B2B e-commerce presents enormous opportunities, but its tax, accounting and regulatory complexity requires a professional approach from the beginning. An error in the application of VAT, lack of registration as an intra-community operator or failure to comply with electronic invoicing can lead to significant penalties and operational problems.
In Strengthen We are specialists in tax and accounting advice for B2B e-commerce and we offer you:
- Analysis of your business model: We determine your specific tax obligations based on your clients and markets
- Registration and registration in all necessary regimes: Intra-community operator, OSS/IOSS if applicable
- Tax configuration of your platform: We help you define the parameters so that the system automatically applies the correct VAT
- Electronic billing management: Implementation of systems in compliance with current regulations
- Presentation of tax models: 303, 349, 369, 390 and all that apply
- Advice on international expansion: Taxation on cross-border sales and regulatory compliance
Are you thinking about digitizing your B2B sales or do you need to regularize your current platform? Contact Afianza and our team of experts will guide you so that your e-commerce meets all obligations and you can focus on growing your business.
