VAT reverse charge Luxembourg: cases and setup

When does the reverse charge apply?

The reverse charge shifts liability for VAT from the supplier to the customer. The supplier invoices without tax, and the customer reports both the VAT due and, where entitled, the deductible VAT. The decisive condition is not the nationality of the parties but the place of supply combined with the customer's status.

What is the most common trap in practice?

The second row of the table. A Luxembourg company subscribing to software, buying consultancy or running an advertising campaign with a foreign supplier must reverse charge the VAT on that expense.

The omission is widespread on card-paid expenses that sit outside the normal supplier workflow. Those amounts never enter the accounting validation flow. They end up booked as a charge without any fiscal position check having taken place.

The useful control is to extract, at each quarter end, all suppliers established outside Luxembourg and confirm that each carries a reverse charge treatment in the corresponding VAT return.

What to verify before applying the reverse charge

Whether the treatment holds is settled before the invoice goes out. The customer's taxable status, since the B2B reverse charge presupposes it. The validity of its VAT number, verified on the European VIES platform as at the date of the transaction, with evidence retained. And the actual nature of the service, since some categories follow derogating place-of-supply rules, notably those connected with immovable property.

A VAT number invalid at the date of the transaction defeats the treatment. The VAT becomes due from the supplier, who will bear it unless it can recover the amount from the customer.

How to set up the reverse charge in an ERP

The mechanism relies on fiscal positions, rules that automatically substitute one VAT treatment for another based on the partner profile. The setup always follows the same order. Create the reverse charge taxes, which generate VAT due and deductible VAT simultaneously; define fiscal positions by zone, domestic, intra-EU B2B, non-EU; assign each partner to its position based on country and VAT number; then verify the mapping to the return boxes.

That last step is the one most often rushed. A treatment that is correct in the ledger can still feed the wrong box on the return. The final check is to confirm that the return reports reverse charge transactions both as VAT due and as deductible VAT, rather than as a net-of-tax base alone. The choice of accounting software directly conditions how reliable this setup can be.

Where does the reverse charge actually cost money?

The mechanism is neutral only where the right of deduction is full. That neutrality breaks in several situations. The partly taxable person, carrying out exempt transactions without right of deduction, who recovers only a fraction of the reverse charged VAT: it then becomes a real cost. Expenditure subject to restricted deduction, since the reverse charge does not remove the restriction. And late correction, which exposes the business to interest even though the transaction was net-neutral.

That is why checking the treatment cannot stop at observing a nil balance at the foot of the return.