What is B2B self-billing and why it matters for SMEs
Self-billing is a B2B invoicing arrangement in which the customer, rather than the supplier, issues the billing document for a service received and sends a copy to the supplier. In Switzerland this practice is permitted and falls within the framework of the Value Added Tax Act (VAT Act; MWSTG).
It is a model widely used in structured supply chains: large retailers, the automotive industry, wholesale trade and electronic procurement platforms. The customer centralises document issuance to simplify reconciliation with orders, deliveries and payments, reducing the risk of duplicates or administrative delays.
For an SME supplier, accepting self-billing means delegating document preparation without delegating tax liability: the VAT shown remains the supplier's responsibility, who must include it in their own accounting and periodic return. This guide explains legal requirements, VAT treatment and accounting entries, with references updated to 2026.
Swiss legal framework: VAT Act and terminology
Swiss VAT law treats the self-billing document as an ordinary invoice issued by the supplier. In commercial practice and FTA documentation the document is often referred to as a Gutschrift. Under Art. 3 para. 1 let. k of the VAT Act it falls within the definition of an «invoice», regardless of the designation used; in this context it should not be confused with a correction or cancellation document for an invoice already issued (Art. 41 VAT Act), but rather denotes the document prepared by the recipient of the supply on behalf of the supplier.
Legal basis
Art. 26 of the VAT Act defines invoice requirements. The self-billing document must meet the same mandatory elements as a standard invoice: clear identification of supplier and recipient, description of the supply, consideration and indication of VAT.
The law does not impose additional specific formal conditions to activate self-billing. In commercial practice, however, the parties almost always conclude a written agreement governing responsibilities, document flows and control obligations.
Agreement between the parties
The self-billing agreement should specify that the supplier will not issue its own invoices for covered transactions, that the customer will prepare documents compliant with Art. 26 of the VAT Act and that both parties undertake to promptly report changes (VAT number, rates, termination of the relationship).
A well-drafted agreement protects the supplier in particular: it allows amounts or incorrect rates to be disputed in writing and documents consent to the billing arrangements in the event of a tax audit.
Self-billing, standard invoice and reverse charge
Confusing self-billing with other VAT mechanisms is one of the main sources of accounting errors. Here is a concise comparison:
| Aspect | B2B self-billing | Standard invoice | Reverse charge (Art. 45 VAT Act) |
|---|---|---|---|
| Who issues the document | The customer (recipient) | The supplier (service provider) | The supplier, with reverse charge notation |
| Main legal basis | Art. 3 para. 1 let. k and Art. 26 VAT Act | Art. 26 VAT Act | Art. 45 VAT Act and ordinance |
| Prior agreement | Strongly recommended in practice | Not required | Not required (statutory rule) |
| VAT debtor | The supplier (subject to objection for errors) | The supplier | The recipient (buyer) |
| Duplicate invoice for the same supply | Must be avoided at all costs | Single issuing document | Single document with specific notation |
| Typical context | Large B2B customers, EDI, supply chains | Standard transactions between SMEs | Specific supplies (e.g. certain foreign services) |
Requirements for the self-billing document
The document prepared by the customer must be equivalent to a VAT invoice compliant with Art. 26 of the VAT Act. There are no additional formal conditions to activate self-billing; the main risk is the customer's inability to deduct input tax (Art. 28 VAT Act) and, for the supplier, the obligation to remit the VAT shown unless a timely written objection is raised.
| Element | Required content | Practical note |
|---|---|---|
| Supplier | Name, address, registration in the taxpayers' register, UID/VAT number | Format CHE-xxx.xxx.xxx with MWST, TVA or IVA suffix |
| Recipient | Customer name and address | Mandatory except for reduced-amount receipt exceptions (Art. 26 para. 3 VAT Act) |
| Supply | Type, subject matter, extent, date or period of supply | Link to purchase order and delivery note |
| Consideration | Net or gross amount with rate indication | If gross, indicate at least the applicable rate |
| VAT | Rate and amount of tax due | 2026 rates: 8.1% (standard), 2.6% (reduced), 3.8% (accommodation) |
| Document identification | Document date; supply date or period if different | Unique customer-side numbering recommended for audit and traceability |
Retain originals or compliant copies for at least ten years (Art. 70 VAT Act), generally from the end of the relevant tax period, in paper or digital format, ensuring readability and integrity. The supplier archives the document received as proof of its taxable turnover.
VAT treatment: obligations of supplier and customer
The VAT shown on the self-billing document is owed by the supplier to the Federal Tax Administration (FTA), except in cases linked to errors in the document. The supplier includes it under the effective method or the flat-rate tax (TAS) method, depending on the applicable regime.
If the customer is subject to VAT and the supply is used for taxable purposes, they may deduct the input tax shown on the document, provided all formal requirements under Art. 26 of the VAT Act are met. Deduction takes place in the customer's periodic return under Art. 28 of the VAT Act, not in the supplier's accounts.
Supplier's written objection
If the document shows VAT not due (supplier not subject to VAT or partially exempt) or an excessive amount (standard rate instead of reduced rate), the supplier must raise a written objection with the customer. In the absence of an objection, the VAT shown remains final for legal purposes.
Risk of duplicate documentary taxation
While the agreement is in force, the supplier must not issue its own invoice for the same supply. Duplicate documentation creates inconsistencies in turnover, input tax deduction and bank reconciliations, with possible corrections and penalties.
Accounting integration: from document to entries
Self-billing affects both sets of accounts. The correct workflow links procurement, inventory, accounts payable and receivable, and the periodic VAT return.
Supplier side (SME selling to a self-billing customer)
| Stage | Accounting action | Typical account (example) |
|---|---|---|
| Delivery of supply | Record revenue net of VAT if accounting at delivery | Debit receivables / Credit revenue |
| Receipt of self-billing document | Confirm amounts; no new sales invoice | External sales document linked to customer |
| VAT entry | Tax due on taxable revenue | Credit VAT payable (2200) |
| Collection | Clear receivable from customer | Debit bank / Credit receivables |
Customer side (document issuer)
| Stage | Accounting action | Typical account (example) |
|---|---|---|
| Receipt of goods/service | Charge expense or activate inventory | Debit expenses or goods / Credit payables |
| Issuance of self-billing document | Purchase document with deductible VAT | Debit input tax (1170) |
| Transmission to supplier | Compliant copy for supplier's archive | EDI, PDF or supplier portal workflow |
| Payment | Settle liability to supplier | Debit payables / Credit bank |
Automation with Accountex
In Accountex, self-billing documents received can be recorded as external sales invoices: the software links the customer, taxable amount, VAT code and accrual period, generating period-end entries and feeding the VAT return without duplicating active invoice issuance.
For customers issuing self-billing documents, purchase recording with the correct VAT code enables automatic reconciliation with open orders and bank statements. Setting rules per supplier (default rate, expense account, profit centre) reduces manual errors on high volumes.
Practical implementation for SMEs and fiduciary firms
Before accepting or activating self-billing with a B2B partner, it is advisable to define a clear internal process:
- Preliminary check: confirm that both parties are subject to VAT (or document exceptions) and that applicable rates for the supplies are agreed.
- Written agreement: include duration, transmission methods, supplier's obligation not to invoice, correction procedures and liability in case of errors.
- ERP configuration: disable automatic sales invoice generation for the relevant customer; enable import of received documents (PDF, EDI, CSV).
- Periodic controls: reconcile self-billing documents received, orders, deliveries and payments monthly; report discrepancies within contractual deadlines.
- Communication with fiduciary: inform the accounting firm of the regime adopted, to align VAT returns and trial balance.
When it makes sense to accept it
- The customer is an anchor buyer with established EDI processes
- Document volumes justify standardisation
- The supplier has adequate internal controls
- Payment terms are clear and monitored
When to proceed with caution
- Supplies with mixed rates or complex exemptions
- Supplier not subject to VAT or on TAS regime with limitations
- Lack of written agreement or correction channels
- Foreign customers with different VAT rules in their country of residence
Compliance checklist and common errors
| Check | Supplier | Customer |
|---|---|---|
| Signed self-billing agreement | Filed and kept up to date | Filed and kept up to date |
| No duplicate invoicing | Active invoicing disabled for customer | Single issuance process |
| Correct supplier VAT data | Verify UID and rates | Updated supplier master data |
| Quarterly VAT reconciliation | Revenue = sum of period self-billing documents | Costs and input tax consistent |
| 10-year document retention | Copy received from customer | Original issued and transmitted |
Errors to avoid
- Treating self-billing as reverse charge (Art. 45 VAT Act): different mechanisms and liable parties
- Not raising a written objection when the VAT shown is incorrect: the supplier remains liable for payment
- Recording the document on the customer side only or supplier side only, creating double-entry imbalances
- Confusing the self-billing document with a credit note for cancellation or post-invoice discount (Art. 41 VAT Act)
- Applying Italian or EU rules (self-billing Art. 17 DPR 633/72) to the Swiss context without verification
B2B self-billing in Switzerland is an efficient tool for simplifying document flows between business partners, but it shifts responsibility for formal correctness to the joint process. With a clear agreement, periodic controls and integrated accounting in tools such as Accountex, SMEs can benefit from standardisation without compromising VAT compliance.