Quick facts
- Price
- $99.00 USD
- shopify versions
- —
- Setup time
- 90 min
- License
- One-time perpetual
- Languages
- 11 languages
One-time Purchase
EU B2B VAT Reverse-Charge & VIES Validator
A build-to-order Shopify app that validates EU VAT numbers against VIES at checkout and automatically removes VAT for verified B2B buyers under the reverse-charge mechanism.
$99.00USD
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Key Features
Real-time EU VAT number validation against the official VIES SOAP service at checkout
Automatic reverse-charge VAT removal once a VAT number is verified as valid
Country-match check — VAT number prefix is validated against the buyer's billing country
Support for both net (ex-VAT) and gross (inc-VAT) storefront pricing models
Per-transaction re-validation so expired or revoked VAT numbers are caught before order placement
Verified status persisted to a customer metafield via the Admin GraphQL API
Automatic customer tagging (e.g. vat-validated, reverse-charge) for segments and reporting
Graceful fallback when VIES is temporarily unavailable — configurable hold or manual-review behaviour
Order and checkout webhooks to keep validation state in sync with Shopify
Audit trail of each VIES lookup (number, country, result, timestamp) for compliance records
OAuth-based install scoped to only the permissions the app needs
Configurable per VAT region so domestic vs cross-border B2B rules apply correctly
About this Product
Selling across EU borders to VAT-registered businesses means you should zero-rate the sale under the reverse-charge mechanism — but only when the buyer's VAT number is genuinely valid. Get it wrong and you either overcharge B2B customers (and lose the sale) or absorb VAT you can't reclaim. Shopify's native tax engine does not validate VAT numbers against VIES (the EU's VAT Information Exchange System), so most merchants are stuck collecting numbers in a free-text field and hoping.
Why Choose EU B2B VAT Reverse-Charge & VIES Validator
Real-time EU VAT number validation against the official VIES SOAP service at checkout
Automatic reverse-charge VAT removal once a VAT number is verified as valid
Country-match check — VAT number prefix is validated against the buyer's billing country
Support for both net (ex-VAT) and gross (inc-VAT) storefront pricing models
Per-transaction re-validation so expired or revoked VAT numbers are caught before order placement
Verified status persisted to a customer metafield via the Admin GraphQL API
This is a build-to-order Shopify app, custom-built, installed, and supported by ECOSIRE — not an instant App Store download. We tailor it to your store's tax setup, checkout flow, and B2B segment before handing you a working install.
What it does: At checkout (or in the customer account), the buyer enters their VAT number. The app calls the VIES SOAP service in real time, confirms the number is registered and active, and matches the country to the buyer's billing country. On a valid match it removes VAT via Shopify's tax-override and discount/Functions layer, writes the verified status to a customer metafield, and tags the customer (e.g. vat-validated, reverse-charge) for segmentation and reporting. It supports both net and gross storefront pricing, and re-validates per transaction so an expired or revoked number is caught before the order is placed — never trusting a stale check from months ago.
Built on the Admin GraphQL API with OAuth install, order and checkout webhooks, and metafields so your data stays inside Shopify. We deliver it configured to your tax regions, document the install, and support it after go-live.
What you get
- A custom Shopify app built to your store's tax configuration and B2B checkout flow
- OAuth installation onto your live Shopify store by the ECOSIRE team
- VIES validation wiring with country-match and reverse-charge tax-removal logic
- Customer metafield + tagging schema configured for your segmentation needs
- Webhook setup for order/checkout sync and validation-state persistence
- Configuration of net/gross pricing behaviour for your storefront
- Admin documentation covering setup, the tagging scheme, and the VIES fallback policy
- Post-launch support window and a defined update/maintenance path
Who this is for
EU wholesale & B2B store owner
Sells to VAT-registered businesses across EU member states and needs cross-border sales correctly zero-rated under reverse-charge without manually checking every VAT number.
Finance / tax compliance manager
Owns VAT reporting and wants a verifiable VIES audit trail and exempt-customer tagging so reverse-charge sales reconcile cleanly and survive a tax authority review.
Shopify Plus operations lead
Runs a B2B-enabled storefront and needs VAT validation embedded in the native checkout and customer-account flow, synced via metafields and webhooks rather than bolted on with spreadsheets.
Installation overview
Download from ECOSIRE
Buy the license on ecosire.com and download the EU B2B VAT Reverse-Charge & VIES Validator module ZIP from your account dashboard.
Upload to Odoo
Extract the ZIP into your Odoo custom addons folder on the server (or upload via Apps > Install from file on Odoo.sh / runbot).
Install the module
Activate Developer Mode, open Apps, click Update Apps List, search for EU B2B VAT Reverse-Charge & VIES Validator, and press Install.
Configure settings
Open the new menu, paste your ECOSIRE license key, connect any external credentials (Shopify, Amazon, Stripe, etc.), and save.
Verify & go live
Run the built-in connection test, sync your first 10 records, and schedule the recurring cron. Contact support if anything fails.
How EU B2B VAT Reverse-Charge & VIES Validator Compares
| Criterion | ECOSIRE | Custom Build | Competitor | Odoo Native |
|---|---|---|---|---|
| Real-time VIES VAT number validation | ||||
| Automatic reverse-charge VAT removal for verified B2B buyers | ||||
| Country-prefix match against billing country | ||||
| Per-transaction re-validation (not a one-time check) | ||||
| Tailored to your exact tax regions and net/gross pricing | ||||
| VIES audit trail and exempt-customer tagging for reporting | ||||
| Built, installed and supported for you | ||||
| No engineering team required on your side |
Frequently Asked Questions about EU B2B VAT Reverse-Charge & VIES Validator
+Is this an instant App Store download?
No. This is a build-to-order app. ECOSIRE builds it around your store's tax setup and B2B checkout, then installs it on your Shopify store via OAuth. You are buying a custom build and installation, not a self-service download.
+How long does delivery take after I order?
Typical delivery is about 1 to 3 weeks from kickoff, depending on your tax-region complexity, whether you use net or gross pricing, and Shopify Plus checkout customizations. We confirm a firm timeline during the scoping call before any build work begins.
+What support and updates do I get after go-live?
Every build includes a post-launch support window for fixes and questions, plus a defined maintenance path. Because VIES endpoints and Shopify's APIs change over time, we offer ongoing update support so validation keeps working — the scope and term are agreed in writing before delivery.
+How does the reverse-charge VAT removal actually work?
When a buyer enters a VAT number, the app calls the VIES SOAP service in real time, confirms the number is active, and checks the country prefix matches the billing country. On a valid match it removes VAT through Shopify's tax-override/Functions layer, records the result to a customer metafield, and tags the customer. Invalid or mismatched numbers keep VAT applied.
+What happens if VIES is temporarily down?
VIES has occasional outages. The app is configured with a fallback policy you choose during scoping — for example, holding the order for manual review or temporarily keeping VAT applied — so you never silently zero-rate an unverified sale. Every lookup is logged so you can reconcile later.
+Does it work with Shopify's native checkout and B2B features?
Yes. It is built on the Admin GraphQL API with OAuth, order/checkout webhooks, and customer metafields, so validation lives inside Shopify's native checkout and customer-account flow rather than an external bolt-on. It supports both standard stores and Shopify Plus B2B configurations.
Why Customers Trust ECOSIRE
SOC 2 Aligned
GDPR Compliant
Secure Stripe Payment
30-Day Money Back
Lifetime Updates
LGPL-3.0 License
Related Modules
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EU B2B VAT Reverse-Charge & VIES Validator
A build-to-order Shopify app that validates EU VAT numbers against VIES at checkout and automatically removes VAT for verified B2B buyers under the reverse-charge mechanism.
- Real-time EU VAT number validation against the official VIES SOAP service at checkout
- Automatic reverse-charge VAT removal once a VAT number is verified as valid
- Country-match check — VAT number prefix is validated against the buyer's billing country
- Support for both net (ex-VAT) and gross (inc-VAT) storefront pricing models