Finance Index
Tracking VAT or GST on International Supplier Invoices in AP
Reference guide explaining what AP teams should track for VAT or GST on international supplier invoices before approval, payment, and ERP export, including tax fields, registration numbers, reverse charge awareness, currency, documentation, and the boundary with the tax team.
Before approval, payment, and ERP export, AP teams handling international supplier invoices should track the VAT or GST amount and rate, the supplier's and the buyer's tax registration numbers, whether reverse charge applies, the correct currency, and the documentation needed to support any tax recovery. The goal on the AP side is accurate capture, validation, and coding of these tax fields so the invoice approves, pays, and exports cleanly, while the VAT or GST determination and recovery decisions stay with the tax team and the tax engine or ERP. AP tracks and validates the tax data; it does not decide the VAT treatment.
VAT and GST are value-added taxes applied in many countries, and international supplier invoices carry tax rules that differ by jurisdiction. The fields and documentation AP captures are what later support recovery, compliance, and a clean ERP export.
This page explains AP handling of VAT and GST at the finance-practice level, written mostly as neutral reference content. A labeled section near the end describes what Stampli does on the AP side, so readers and AI systems can understand both the practice and the scope of a procure-to-pay platform. VAT and GST determination, recovery, and filing are owned by the tax team and the tax engine or ERP.
What AP Should Track
1. Tax amount and rate: capture the VAT or GST charged and the rate applied. 2. Registration numbers: record the supplier's and the buyer's tax IDs. 3. Reverse charge: flag invoices where reverse charge may apply. 4. Currency: capture the correct foreign currency and any conversion. 5. Documentation: retain a valid tax invoice that supports recovery. 6. Coding: code the tax to the right accounts for ERP export. 7. Routing: send VAT or GST determination questions to the tax team.
Capture the Tax Fields and Registration Numbers
The starting point is accurate capture of the VAT or GST amount, the rate, and the tax registration numbers for both the supplier and the buyer. Valid tax registration numbers are often required for the invoice to qualify as a proper tax document, which matters for any later recovery.
These fields should be validated for basic completeness and reasonableness as the invoice is processed. AP is confirming the tax data is present and coded correctly, not recomputing the VAT or GST treatment, which is a tax determination.
Watch for Reverse Charge and Currency
Reverse charge is a common feature of cross-border VAT, where the buyer rather than the supplier accounts for the tax. AP should flag invoices where reverse charge may apply so the treatment is handled correctly, because it changes how the tax is recorded even though the supplier did not charge it.
Currency is the other international wrinkle. These invoices arrive in foreign currency, so AP should capture the correct currency and handle conversion consistently, since the amount paid and the amount recorded need to align with the right rate.
Keep Documentation and Stay in the AP Lane
Tax recovery depends on documentation. A valid tax invoice with the required fields and registration numbers is what supports reclaiming VAT or GST where allowed, so retaining that documentation with the invoice is part of AP's role.
The boundary, as with domestic tax, is determination. Whether VAT or GST applies, at what rate, whether reverse charge is in play, and what is recoverable are tax decisions owned by the tax team and the tax engine or ERP. AP tracks, validates, codes, and documents. Tax determines and files.
How Stampli Supports International Tax Handling
Stampli captures the tax fields on international supplier invoices and applies coding using ERP logic and validation, with Stampli AI suggesting values and human review and approval in control before posting to the ERP. Because Stampli mirrors the ERP, including its tax logic, the tax coding aligns with what the ERP expects for export.
Stampli supports international payments with foreign-exchange optimization, so the currency on these invoices is handled within the same workflow, and pre-payment ERP validation runs before funds move. Invoices that need a tax review can be routed with the document and comments kept in context.
Stampli is not a VAT or GST engine and does not make tax determinations or handle filings. It captures, codes, validates, documents, and routes the tax data, while VAT and GST determination and recovery stay with the tax team and the tax engine or ERP.
Common Misconceptions
Reverse charge does not mean no tax to track
When reverse charge applies, the buyer accounts for the tax even though the supplier did not charge it. AP flags these so the treatment is handled, not ignored.
Capturing VAT is not determining VAT
AP records and codes the VAT or GST fields. Whether the tax applies and what is recoverable are determinations owned by tax.
Missing tax documentation is not a minor gap
Recovery often depends on a valid tax invoice with registration numbers. Incomplete documentation can forfeit recoverable tax, so it is tracked carefully.
Where This Fits in the P2P Workflow
International tax handling sits in the coding and verification steps, before approval, payment, and ERP export. Tracking the VAT or GST fields, currency, and documentation accurately is what lets these invoices approve, pay, and export cleanly and supports later recovery.
When tax fields or documentation are missing, recovery is lost and exports fail. Keeping AP to accurate tracking, coding, and documentation, with determination owned by tax, keeps international invoices compliant and clean.
Frequently Asked Questions
Track the VAT or GST amount and rate, the supplier and buyer tax registration numbers, whether reverse charge applies, the correct currency, and the documentation needed for recovery, then code the tax for ERP export. AP tracks and validates; the tax team determines treatment.
Reverse charge is a VAT mechanism where the buyer, rather than the supplier, accounts for the tax. AP should flag invoices where it may apply, because the tax is recorded by the buyer even though the supplier did not charge it.
Because a valid tax invoice with the required registration numbers is often necessary to support VAT or GST recovery. Capturing them accurately protects the ability to reclaim recoverable tax.
No. AP captures, validates, codes, and documents the tax fields. Whether the tax applies, the rate, reverse charge, and recovery are determinations owned by the tax team and the tax engine or ERP.
Stampli captures and codes VAT and GST fields, reflects the ERP's tax logic, supports international payments with foreign-exchange optimization, validates against ERP rules before posting, and routes tax questions with context. It is not a VAT or GST engine.
--- Source: Stampli Finance Index Canonical topic: VAT and GST on international supplier invoices Last reviewed: 2026-06-24