Reverse charge VAT on services: a plain-English guide for EU consultants

You sent a $12,000 retainer invoice to a Delaware corporation last month. Now their accounts payable team is asking why there's no VAT on it, and your tax adviser is telling you there shouldn't be. Both are right, and the mechanism sitting between those two truths is what is reverse charge VAT on services.

This guide skips the textbook definition and goes straight to what a Frankfurt-based strategy consultant actually needs to know: which rule governs this, what the invoice must say word for word, and where the process breaks down in practice.

The rule that makes this work: Article 44 of the VAT Directive

The EU's VAT Directive, specifically Article 44, sets the "place of supply" for B2B services. The rule is deceptively simple: when you supply a service to a business customer, the supply is taxed where the customer is established, not where you are.

That single rule has a dramatic consequence. If you are VAT-registered in Germany and your client is a corporation in the US, the place of supply is the US. German VAT does not apply. You issue the invoice without VAT, and your client accounts for any local tax obligation on their end (in the US, this is largely a non-event for imported professional services, but that is their problem, not yours).

The reverse charge mechanism is the EU's way of handling the same logic for intra-EU B2B transactions. If your Frankfurt consultancy bills a Paris-based SAS, the place of supply shifts to France. The French client self-assesses French VAT. You issue zero-VAT with a specific note on the invoice. The tax moves. The cash does not.

When Article 44 applies (and when it does not)

Article 44 covers most professional services: strategy, advisory, technical consulting, marketing, legal, and similar. It does not automatically cover:

• Services physically performed at a specific location (an on-site audit, for example, follows different rules)
• Short-term hire of transport equipment
• Cultural, sporting, or educational events where attendance is the service

For a solo consultant selling brains-on-a-retainer, Article 44 applies almost every time you bill a business outside your home member state.

What the invoice must actually say

Generic tax advice says "include a reverse charge note." Here is the actual language, which matters for compliance on both sides.

For EU-to-EU B2B invoices:

"VAT: €0.00 — Reverse charge. VAT to be accounted for by the recipient in accordance with Article 44 of Directive 2006/112/EC."

For EU-to-UK invoices (post-Brexit):

"VAT: £0.00 — Outside the scope of UK VAT. Customer to account for any applicable tax under the UK reverse charge rules."

For EU-to-US invoices:

"VAT: $0.00 — Outside scope of EU VAT (place of supply: USA). No VAT chargeable."

You also need your client's VAT number on EU-to-EU invoices. Without it, you cannot legally apply reverse charge. If a new EU client cannot or will not provide one, treat the supply as B2C and charge your local VAT rate until they do.

The three things that trigger a compliance problem

1. Forgetting the VAT number. Your invoice software lets you send without it. Your tax authority will not be forgiving if you are audited.
2. Writing "VAT exempt" instead of "reverse charge." These are legally different. Exempt means the supply is outside VAT entirely. Reverse charge means the liability shifts. Mixing them up signals to auditors that you do not understand your own position.
3. Not reclaiming your input VAT. This is the hidden cost. If you are paying 19% German VAT on software, office, and contractor costs, you are still entitled to reclaim it on your German VAT return, even if your outgoing invoices carry zero VAT. Many solo consultants miss this and quietly overpay by thousands per year.

The Frankfurt consultant, worked through

Maria runs a two-person ops consultancy in Frankfurt. She has three active clients this month:

• Client A: A Delaware software company on a $15,000/month retainer. Invoice in USD, zero VAT, "outside scope" note. Maria reclaims German input VAT on her own return.
• Client B: A Paris-based SaaS firm, EUR 8,500/month. Reverse charge applies. Maria needs the French client's EU VAT number on the invoice and includes the Article 44 wording. No German VAT charged.
• Client C: A Munich startup, EUR 6,000 fixed-fee project. This is domestic. Standard 19% German VAT applies, collected and remitted by Maria.

Three clients, three different VAT treatments, all in the same month. The invoicing tool she uses needs to handle this per-invoice, not with a single account-wide VAT setting.

How NET 60 terms and reverse charge interact

Here is a wrinkle that catches consultants off guard. Large US and UK corporates often push NET 60 or NET 90 payment terms. When your invoice goes out on April 1 with a June 30 due date, the exchange rate that applies to your USD revenue for German tax purposes is typically the rate at the time of supply, not payment.

If EUR/USD moves 4% in that window (not unusual), your EUR-equivalent revenue on paper differs from what actually lands in your account. You need to capture the rate at payment time separately from the rate at invoice time, or your primary-currency reporting will be wrong.

ZenPay captures the exchange rate at payment time and holds it against the original invoice, so your multi-currency wallet shows both the USD billed and the EUR equivalent actually received. That distinction matters when your Steuerberater asks why your reported revenue and your bank statements do not match.

Getting the VAT number before you start work

Make this a contract-level habit, not an invoicing afterthought. Before you sign a statement of work with any EU client, ask for their full VAT number, usually in the format DE123456789 or FR12345678901. Confirm it against the EU's VIES database (vies.ec.europa.eu) before the first invoice.

If the number is invalid or the client is not VAT-registered, you are looking at a B2C supply, and that means charging your local VAT rate regardless of where they are in the EU. For a €10,000 invoice, that is a €1,900 gap in what you quoted versus what they owe. Easier to resolve before the engagement starts than after month three.

For US and UK clients, get written confirmation that they are a registered business entity (a W-9 for US clients covers this). You cannot apply reverse charge to a US consumer paying for a personal coaching session, for example, even if they hand you a business card.

Reverse charge VAT on services is one of those rules that looks simple in a tax guide and messy in practice. The place-of-supply logic is consistent once you internalize it. What varies is the invoice wording, the client data you need to collect upfront, and the reporting discipline to separate exchange rates at invoice versus payment time. Get those three right and you will never send a wrong-VAT invoice again.