If you sell digital services to consumers in the EU, you must usually charge VAT at the rate that applies in the customer’s own country, and the simplest way to manage this is registering for the non-Union One Stop Shop. Business-to-business sales are normally handled through the reverse charge instead. Your first task this quarter is working out whether your EU customers are mainly consumers or businesses, then deciding between OSS registration and separate registrations in each member state, using the HMRC guidance and the EU’s OSS portal as your starting points.
TL;DR:
- Registering for the EU’s non-Union OSS simplifies VAT compliance by allowing single quarterly filings for all B2C digital sales across the bloc.
- Accurate evidence collection at checkout, such as billing address and IP address, is crucial for proving customer location and avoiding disputes.
- Digital services are taxed in the customer’s country, with special rules for onboard, mobile, and landline services that depend on location.
- Reverse charge rules apply for B2B sales, provided you can verify your customer’s VAT number through the EU database with proper documentation.
- Future EU reforms like ViDA will increasingly require structured digital reporting, making early system preparation essential for compliance.
The EU treats a defined group of offerings as telecoms, broadcasting and electronically supplied services, usually shortened to TBE. This category covers software subscriptions, streaming platforms, mobile apps, online courses that run without human tutoring, and cloud-based tools such as SaaS products. If your fintech app charges UK and EU users a monthly fee with no manual delivery involved, it almost certainly falls under TBE rules.
The rule that matters most is simple to state and harder to apply: VAT is due where the consumer is located, not where your business is based. A UK company selling a subscription to a customer in Germany owes VAT at the German rate, even though the business itself never sets foot there.
A few situations need special handling:
These edge cases matter more than they might seem for a startup, particularly if your product has an offline or travel-related use case. Getting the location wrong at the point of sale is the root cause of most compliance problems that surface later.
Whether you charge VAT at all depends heavily on who is buying. For B2C sales, that is, sales to private consumers, you generally must charge and collect VAT at the customer’s local rate. For B2B sales, the reverse charge usually applies: your EU business customer accounts for the VAT themselves, and you issue an invoice without VAT.
This distinction only works if you can actually prove your customer is a business. According to HMRC’s guidance, the practical checks are:
Pro Tip: Build VAT number validation into your checkout flow rather than checking it manually after the sale. A failed or missing check at the point of purchase is far easier to fix than reconstructing evidence months later during an audit.
There are exceptions worth flagging early. Digital platforms and marketplaces are sometimes treated as the “deemed supplier” for VAT purposes, meaning the platform, not the underlying business, becomes liable for charging and remitting VAT. If you sell through a marketplace rather than direct to consumers, check whether that marketplace has already assumed this responsibility, because assuming it has when it has not is a common and costly mistake.
Most UK businesses selling B2C digital services into the EU face a genuine choice: register once for the non-Union OSS, or register separately in every member state where you have customers. The European Commission’s OSS scheme lets a business not established in the EU declare all its B2C digital service sales across the bloc in a single quarterly return, picking any member state to act as its “Member State of identification.”
The benefits are significant for a startup running lean finance operations:
Local registration in a specific member state becomes necessary in narrower circumstances, chiefly if you have a fixed establishment there. A UK company that opens an EU office or otherwise becomes established in a member state may need to file domestic returns for supplies originating from that location, on top of or instead of using OSS for other sales.
Practically, registering for non-Union OSS means choosing your Member State of identification, receiving an OSS-specific VAT identification number, and then filing returns on a quarterly basis, matching the EU’s OSS filing cycle. There is no minimum sales threshold that exempts UK suppliers from this: as HMRC’s guidance confirms, no threshold applies once you make any taxable digital sale to an EU consumer, VAT is due regardless of the amount involved.
Once you know a sale is B2C, you need two things: the correct rate and evidence that justifies using it. EU member states set their own VAT rates, and these are published in the Taxes in Europe Database, which is the practical reference point when your billing system needs to map a country to a percentage.
Evidence is where most disputes with tax authorities actually happen. HMRC’s guidance on supplying digital services to private consumers sets out the accepted proof points:
Relying on a single field, say, billing address alone, is a weak position if challenged. The safer approach combines at least two independent, non-contradictory pieces of evidence, such as billing address plus IP address or bank location.
Pro Tip: Store the evidence, not just the conclusion. An auditor wants to see the raw billing address and IP data behind each transaction, not simply a note saying “customer confirmed as German.”
Under OSS rules, this evidence must be retained for ten years from the end of the year in which the transaction took place, in a format that can be produced on request.
OSS returns follow a fixed rhythm. You file quarterly, and payment is due by the end of the month following the end of each quarter, as confirmed in the EU’s guidance on declaring and paying through OSS. Your Member State of identification collects the total payment and distributes the relevant portions to each country where your customers were located.
Several mistakes come up repeatedly among businesses new to this system:
None of these are complicated in isolation, but they compound quickly for a growing business processing hundreds of transactions a month without a system built to catch them.
It is easy to confuse the UK’s Digital Services Tax with EU VAT obligations, but they are separate regimes aimed at entirely different targets. DST is a 2% tax on revenues that large digital businesses earn from specific activities such as search engines, social media platforms and online marketplaces, and it only applies to groups with over £500 million in global revenues and over £25 million in UK revenues from those activities.
If your business is nowhere near those DST thresholds, and most SMEs are not, your compliance attention belongs entirely on EU VAT and OSS.
The EU adopted its “VAT in the Digital Age” reforms, known as ViDA, on 11 March 2025, alongside Directive (EU) 2025/516. Together they set out a phased rollout of digital reporting and e-invoicing requirements running through to 2035.
One EU regulatory package to watch: the ViDA reforms will progressively require structured e-invoicing and transaction-level digital reporting, changing how OSS filings interact with day-to-day invoicing systems.
For a UK business, the practical impact is likely to show up first in invoicing format requirements and possibly mandatory data fields on cross-border B2B transactions. The sensible move now, well before any deadline bites, is making sure your billing and accounting systems capture structured, consistent data rather than free-text fields that would need retrofitting later. If you already use Xero, that means checking your integrations capture VAT-relevant fields, such as customer country and VAT status, in a structured way from the outset.
Turning the rules above into action does not need to wait for a formal registration deadline. A practical sequence looks like this:
Complex situations, multiple platforms in your sales chain, marketplace deemed-supplier questions, or a mix of B2B and B2C sales through the same product, are where it is worth bringing in an adviser rather than guessing. Specialist firms provide VAT compliance support similar to this kind of VAT compliance work, alongside the bookkeeping and reporting needed to keep the numbers consistent once OSS is running.
The most common error is not a wrong rate, it is missing evidence. Founders often set up billing correctly on day one, then change payment providers or add a new checkout flow and quietly stop capturing the fields that prove customer location. By the time a review happens, months of transactions carry no defensible paper trail.
Automated evidence capture, built into checkout rather than bolted on afterwards, removes this risk almost entirely and saves the far larger cost of reconstructing records under time pressure. Treating VAT compliance as part of growth planning, not an afterthought once revenue arrives, is the difference between a routine quarterly task and a scramble.
— Rahamut
Working out OSS registration, evidence rules and quarterly filings alongside product development is a lot to carry alone. Some accounting firms work with UK tech and fintech founders on combinations of these tasks, so compliance runs quietly in the background rather than eating a week each quarter.
The result is audit-ready evidence, filings submitted on time, and VAT treated as a predictable line in your cash flow rather than a quarterly surprise. Visit our VAT compliance service page or check current plans and pricing to get started.
The guidance above draws on primary sources, and it is worth bookmarking them directly:
Checking a checkout page for accurate location data capture is also worth doing alongside a specialist in ecommerce conversion, such as through ecommerce SEO and site services, since the same fields that support VAT evidence often affect checkout performance too.
The Digital Services Act is a separate piece of EU regulation covering online platform content and safety obligations, not VAT. It is distinct from the VAT and OSS rules described in this article, and UK businesses should not confuse the two when assessing their EU digital sales obligations.
Digital services such as software subscriptions, apps, streaming and online courses delivered automatically are subject to standard UK VAT rules when sold domestically. For sales to EU consumers, VAT is instead due in the customer’s own member state under the rules HMRC sets out for cross-border digital supplies.
The most significant near-term change is the EU’s ViDA reform package, adopted in March 2025, which phases in digital reporting and e-invoicing requirements between 2027 and 2035. UK businesses selling into the EU should expect stricter data and invoicing standards to apply progressively over that period rather than a single cut-off date.
VAT on digital services is the tax charged on products such as apps, software and streaming content, based on where the customer is located rather than where the seller is based. UK suppliers must generally charge this VAT to EU consumers and account for it through the non-Union OSS scheme or local registrations.
Not usually. Registering once for the non-Union OSS scheme lets most UK businesses declare all their EU B2C digital sales in a single quarterly return, avoiding separate registrations in each member state unless you have a fixed establishment there.
