What is VAT architecture for e-commerce and SaaS?

It is the alignment of the sales model with VAT obligations: where tax arises, whether OSS and IOSS regimes are applicable, and whether warehouses create fixed establishment. In e-commerce and SaaS, sales take place across several countries at once, and VAT logic must match how the business actually sells, stores and delivers, not only its registration documents.

When do OSS and IOSS regimes apply?

OSS and IOSS are simplified VAT reporting regimes for sales in the EU. The key question is whether the regime applies to the specific sales model and whether the model creates any exceptions. A common error is to choose a regime formally, when the actual sales and logistics structure does not match it, leaving the risk open.

Does a warehouse create fixed establishment for VAT?

It can. A warehouse, inventory or fulfilment centre in another country can create VAT registration and fixed establishment for VAT purposes. Therefore, in e-commerce, the location of warehouses and logistics must be analysed in advance: it changes the VAT profile of the model more than registration and contractual documents may suggest.

DEEP DIVE · VAT

VAT Architecture for e-commerce and SaaS
OSS, IOSS and fixed establishment

How to build a VAT model so that it aligns with operating logic, warehouses, people and banking perception.

VAT logic differs from CIT

VAT is a tax on turnover and flow. It responds to the physical movement of goods, the place of consumption of the service and the operational footprint.

It is possible to have no PE for corporate tax, but still have VAT obligations.

OSS — when it works

OSS allows B2C sales within the EU to be reported through a single registration.

Sales from one EU country
No warehouses in other countries
No fixed establishment

OSS is a reporting mechanism. It does not eliminate registration obligations where a local nexus arises.

IOSS — imports up to €150

It applies to the import of low-value consignments of goods directly to the consumer.

But IOSS does not solve the problem of warehouses inside the EU.

Fixed Establishment (VAT)

FE arises if a country has:

human resources
technical resources
the ability to provide services

This does not necessarily require a company. Sometimes people and infrastructure are enough.

Warehouses and fulfilment

Estonian OÜ

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Warehouse

Germany

The presence of a warehouse almost always creates an obligation to register locally for VAT.

SaaS and digital services

B2C SaaS in the EU is taxed at the place of consumption.

OSS may apply, but if there is a team in another country, the question of FE arises.

Alignment of VAT, PE and Banking

A common error is to analyse VAT separately.

Where warehouses are located
Where employees work
Where decisions are made
How the bank sees this

VAT architecture must be aligned with the overall structural logic of the group.

Need to rebuild your VAT model?

We will audit the flows and align the architecture with the tax and operational reality.

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Related Materials

This material is analytical and does not constitute tax advice.

VAT Architecture for e-commerce and SaaS OSS, IOSS and fixed establishment