EU VAT, OSS & IOSS Compliance for WooCommerce

Key Features

Destination-based B2C VAT rates for all 27 EU member states, applied via WooCommerce tax hooks (woocommerce_product_get_tax_class, woocommerce_calculated_total) at cart and checkout

Real-time B2B VAT number validation against the EU VIES SOAP service, with graceful fallback and caching when VIES is temporarily unavailable

Automatic zero-rated reverse-charge handling for valid cross-border B2B orders, including the legally required 'VAT reverse charge' invoice annotation

€10,000 distance-sales threshold monitor that tracks rolling cross-border B2C turnover and warns in wp-admin when you must register for OSS

OSS (One Stop Shop) quarterly CSV report generation, grouped by destination country and VAT rate, ready for your national tax portal

IOSS (Import One Stop Shop) monthly CSV report generation for sub-€150 imports into the EU

Live ECB (European Central Bank) exchange-rate conversion so non-EUR sales report the correct EUR VAT base

Per-order VAT evidence capture (IP-derived country, billing country, rate applied, VIES result) stored as order meta for audit defence

Full HPOS / custom order tables compatibility — reads and writes order data through the WooCommerce CRUD layer, not direct post meta

Dedicated WooCommerce settings tab (under WooCommerce → Settings → Tax) for rate overrides, exempt categories, and merchant VAT registration numbers

WP-Cron scheduled refresh of EU rate tables and ECB rates so rates stay current without manual updates

WPML and multisite compatible, with VAT logic running independently of the active store language or sub-site

Configurable digital-goods vs physical-goods rules, since EU place-of-supply differs between them

Exposes order VAT data through the WooCommerce REST API for export to your accounting system

Built to order, done for you

No DIY setup — a working app, built, installed and supported by ECOSIRE.

You order

Start with a one-time build price. We scope it with you at kickoff.

We build & install

ECOSIRE builds, configures and installs it on your WooCommerce.

Go live + support

You go live in about 2–4 weeks, with a post-launch support window.

About this Product

EU VAT, OSS & IOSS Compliance for WooCommerce is a custom plugin that ECOSIRE builds, installs, and maintains on your own WordPress site — it is not an instant WordPress.org or WooCommerce.com download. You purchase the build, we scope your country mix and tax setup, then deliver a tested plugin wired into your live store.

Since the 2021 EU VAT reform, WooCommerce core only handles flat tax tables — it cannot determine the destination-based B2C rate for all 27 member states, validate a buyer's VAT number, or produce the quarterly OSS and monthly IOSS filings your accountant needs. This plugin closes that gap.

At checkout it resolves the customer's shipping country and applies the correct standard or reduced VAT rate for that destination, recalculating totals through standard WooCommerce tax hooks (woocommerce_product_get_tax_class, woocommerce_calculated_total). For B2B orders it calls the EU VIES SOAP service to validate the entered VAT number in real time; a valid cross-border number triggers a zero-rated reverse-charge line with the legally required invoice note.

A built-in €10,000 distance-sales threshold monitor tracks your rolling cross-border B2C turnover and flags when you cross into mandatory OSS territory. The plugin stores per-order VAT evidence (IP country, billing country, rate applied) and exports OSS and IOSS CSV reports ready for your tax portal. Live ECB exchange rates convert non-EUR sales for accurate VAT base amounts.

Built for HPOS (High-Performance Order Storage), WPML-compatible, and delivered with documentation. ECOSIRE handles installation, a staging-first rollout, and ongoing updates as VAT rules change.

What you get

A custom WooCommerce plugin (.zip) built to your country mix, product types, and B2B/B2C model

Installation and configuration on your live or staging WordPress site by ECOSIRE

A staging-first rollout with checkout VAT, VIES validation, and reverse-charge tested before go-live

Pre-loaded EU VAT rate tables plus the WP-Cron jobs that keep them and ECB rates current

OSS and IOSS CSV report templates configured for your tax jurisdiction

Admin documentation covering the settings tab, threshold monitor, and report export workflow

A post-launch support window for bug fixes and VAT-rule updates

Who this is for

Cross-border EU D2C store owner

Sells physical goods from one EU country to consumers across the bloc, has crossed (or is nearing) the €10,000 distance-sales threshold, and needs correct destination VAT plus quarterly OSS reporting without hiring a developer in-house.

B2B WooCommerce wholesaler

Ships to VAT-registered businesses across the EU and must validate VAT numbers through VIES and apply reverse-charge zero-rating correctly, with audit-ready evidence on every invoice.

Digital products / SaaS seller

Sells downloads, courses or subscriptions where EU place-of-supply rules tax at the buyer's location from the first sale, and needs IOSS-aware reporting and ECB currency conversion baked into checkout.

How EU VAT, OSS & IOSS Compliance for WooCommerce Compares

Criterion	ECOSIRE	Custom Build	Competitor
Destination-based B2C VAT for all 27 EU states	Included	Partial support	Included
Real-time VIES B2B VAT number validation	Included	Partial support	Partial support
Automatic B2B reverse-charge zero-rating	Included	Partial support	Partial support
€10,000 distance-sales threshold monitoring	Included	Not included	Partial support
OSS and IOSS CSV report generation	Included	Partial support	Partial support
Live ECB exchange-rate VAT conversion	Included	Partial support	Partial support
Built, installed and supported for you on your site	Included	Included	Not included
Tailored to your exact country mix and product types	Included	Included	Not included
Instant self-service download, no lead time	Not included	Not included	Included

Frequently Asked Questions about EU VAT, OSS & IOSS Compliance for WooCommerce

Is this an instant download from WooCommerce.com or WordPress.org?

No. This is a build-to-order plugin. ECOSIRE scopes your country mix and tax model, builds the plugin to fit, and installs it on your WordPress site. You are buying a built-and-installed solution plus support, not a self-service marketplace download.

How long does delivery take after I purchase?

Typical delivery is 2 to 3 weeks from the kickoff call, depending on how many EU destinations, product types, and B2B rules you need. Simpler single-country-of-origin B2C setups are faster; complex mixed digital/physical and multisite stores take longer. We confirm a firm timeline during scoping.

How does the VIES B2B validation actually work?

When a customer enters an EU VAT number at checkout, the plugin calls the official EU VIES SOAP web service to confirm the number is valid and registered. If valid and cross-border, the order is zero-rated as a reverse charge with the required invoice note. VIES results are cached and the plugin degrades gracefully if the EU service is temporarily down.

Do I get ongoing support and updates as EU VAT rules change?

Yes. Delivery includes a post-launch support window for bug fixes, and EU rate tables plus ECB exchange rates refresh automatically via WP-Cron. When VAT rules or rates change at the policy level, ECOSIRE can ship plugin updates under a support or retainer arrangement so your store stays compliant.

Will it work with HPOS, WPML and my existing theme?

Yes. The plugin is built for WooCommerce High-Performance Order Storage and reads and writes order data through the WooCommerce CRUD layer, not direct post meta. It is WPML and multisite compatible, and because the VAT logic runs through standard WooCommerce tax and checkout hooks, it works alongside your existing theme and most checkout setups.

Does this replace my accountant or tax registration?

No. The plugin charges correct VAT and generates the OSS and IOSS CSV reports you or your accountant submit to the tax portal. You still need to register for OSS/IOSS where required and file the returns. It removes the manual calculation and data-gathering work, not the legal filing obligation.