Illustrative previewA custom-built WooCommerce plugin that applies the correct destination EU VAT rate,
validates B2B VAT numbers against VIES, exports OSS/IOSS returns and issues compliant sequential invoices — built, installed and supported on your site by ECOSIRE.
What is EU VAT, OSS & Tax Compliance Automation for WooCommerce?
A custom-built WooCommerce plugin that applies the correct destination EU VAT rate, validates B2B VAT numbers against VIES, exports OSS/IOSS returns and issues compliant sequential invoices — built, installed and supported on your site by ECOSIRE. Built to order by ECOSIRE for WooCommerce (build-to-order) — indicative price from $999.00 USD; request a quote for a scoped proposal.
Key Features
Built to order, done for you
No DIY setup — a working app, built, installed and supported by ECOSIRE.
- 1
You order
Start with a one-time build price. We scope it with you at kickoff.
- 2
We build & install
ECOSIRE builds, configures and installs it on your WooCommerce.
- 3
Go live + support
You go live in about one working week, with two weeks of go-live support. Defects in the code we deliver are fixed free of charge.
About this Product
Selling across the EU turns WooCommerce's basic tax tables into a liability. Since the 2021 VAT e-commerce reform, the rate you charge depends on the customer's destination country, your One-Stop-Shop (OSS) registration, and whether the buyer is a VAT-registered business entitled to the reverse charge. WooCommerce core can store flat tax rates, but it cannot validate a VAT number, switch between B2C and B2B logic, track the EUR 10,000 distance-selling threshold, or produce the quarterly OSS return your tax authority expects.
This is a build-to-order plugin, not a marketplace download. ECOSIRE designs, builds, installs and supports it directly on your WordPress site. We tailor it to your product mix (physical goods, digital goods/MOSS, or both), your registration state, your invoice format, and your existing checkout and theme.
The plugin hooks into WooCommerce at the right points: a woocommerce_calculated_total / tax filter layer applies the live EU VAT rate by ship-to country, a checkout field plus an AJAX action validates the buyer's VAT number against the EU VIES SOAP service and zero-rates qualifying B2B reverse-charge orders, and a WP-Cron job refreshes rates and rebuilds OSS datasets. Orders are stored cleanly under HPOS (custom order tables) with VAT metadata (rate applied, VIES result, B2B/B2C flag, evidence of customer location) so every line is auditable.
Reporting is first-class: a wp-admin settings screen under WooCommerce lets you export OSS and IOSS returns as CSV/XML grouped by destination country and rate, handle digital-goods VAT MOSS, and emit compliant sequential invoice numbering that never skips or duplicates. It is built to coexist with WPML and multisite stores. You get a documented, single-tenant plugin you own — no per-order SaaS fees.
What you get
- A custom-built WooCommerce/WordPress plugin (single-tenant, owned by you) installed on your site by ECOSIRE
- Configuration of your EU VAT rates, OSS/IOSS registration state and the EUR 10,000 threshold to your business
- VIES B2B validation wired into your existing checkout, tested against real EU VAT numbers
- Working OSS/IOSS export tooling in wp-admin producing files in your tax authority's expected layout
- Compliant sequential invoice numbering configured to your current numbering scheme with no gaps
- HPOS compatibility verification plus a staging-to-production deployment of the plugin
- Admin handover documentation and a screen-share walkthrough of settings, exports and edge cases
- A defined post-launch support and update window (see FAQ) covering WooCommerce/WordPress version changes
Who this is for
Cross-border DTC store owner
Ships physical goods from one EU country to consumers across the bloc, has crossed the EUR 10,000 threshold, and needs destination-correct VAT plus a clean OSS return without hiring an accountant to reconcile every quarter.
Digital-goods / SaaS seller
Sells e-books, templates, plugins or subscriptions to EU consumers where VAT MOSS rules apply from the first sale. Needs customer-location evidence, per-country digital rates and OSS exports that hold up to audit.
B2B and mixed-cart merchant
Sells to both businesses and consumers, so needs live VIES validation to apply the reverse charge for valid EU VAT numbers while still charging consumers correctly, all stamped on compliant invoices.
How EU VAT, OSS & Tax Compliance Automation for WooCommerce Compares
| Criterion | ECOSIRE | Custom Build | Competitor | WooCommerce Native |
|---|---|---|---|---|
| Live destination-country EU VAT rate at checkout | Included | Included | Included | Partial support |
| VIES B2B VAT validation with automatic reverse charge | Included | Partial support | Partial support | Not included |
| OSS / IOSS quarterly return exports | Included | Partial support | Partial support | Not included |
| Digital-goods VAT MOSS handling | Included | Partial support | Partial support | Not included |
| Gap-free compliant sequential invoice numbering | Included | Included | Partial support | Not included |
| HPOS / custom-order-table compatible VAT metadata | Included | Partial support | Partial support | Included |
| Installed, configured and supported on your site | Included | Included | Not included | Not included |
| Tailored to your registration state, product mix and invoice format | Included | Included | Not included | Not included |
| Instant self-service download | Not included | Not included | Included | Included |
| You own single-tenant code with no per-order SaaS fees | Included | Included | Partial support | Included |
Frequently Asked Questions about EU VAT, OSS & Tax Compliance Automation
How long does delivery take, and what does the build process look like?
This is built to order, so it is not an instant download. A typical build is delivered in about one working week. We start with a short scoping call to confirm your OSS/IOSS registration, product mix and invoice format, then build and configure the plugin on a staging copy of your site, run test orders against real EU destinations and VIES, and deploy to production after you sign off. Complex multisite or WPML setups may add a few days.
What ongoing support and updates are included?
Every build includes a post-launch support window (two weeks) covering bug fixes and adjustments, plus compatibility maintenance for WooCommerce and WordPress core updates during that period. After it ends, we offer an optional care plan that keeps the plugin compatible with new WooCommerce/HPOS and WordPress releases, refreshes VAT rates if EU rates change, and gives you a support channel. You own the plugin code either way.
Is this real-time VAT charging or does it just store rates like WooCommerce core?
It charges in real time. The plugin hooks into WooCommerce's tax calculation so the correct destination-country rate is applied live at cart and checkout, B2B orders with a valid VIES number are zero-rated on the spot, and digital goods use customer-location rules. WooCommerce core can only hold static tax-rate tables and cannot validate VAT numbers or build OSS returns.
Will it work with my theme, HPOS, WPML and other plugins already installed?
Yes. It is built against current WooCommerce with HPOS (custom order tables) and is theme-independent because it works through standard WooCommerce hooks and filters rather than editing templates. It is built to coexist with WPML/WooCommerce Multilingual and multisite. During scoping we check for conflicts with subscription, gateway or accounting plugins and adapt the build accordingly.
Does the OSS export actually match what my tax authority needs, and does it replace my accountant?
The export groups taxable sales by destination country and rate and outputs CSV/XML you can use to file your OSS/IOSS return, with full per-order evidence stored for audit. It removes the manual reconciliation work, but it is a compliance tool, not tax advice. We recommend your accountant or tax advisor reviews the first filing; many merchants then file the quarterly return themselves.
Do I need to be VAT/OSS registered before you build this?
Not to build it, but you should register for OSS (or IOSS for imports) before you start filing through it. We configure the plugin to your registration state and the EUR 10,000 distance-selling threshold. If you have not yet crossed the threshold, we set it to charge domestic VAT and switch to destination VAT automatically once you do.
Related Modules
Etsy Connector for WooCommerce
A custom-built WooCommerce plugin that keeps your listings, inventory, prices and orders in sync between WooCommerce and Etsy. Built, installed and supported on your site by ECOSIRE.
EU Digital-Goods VAT (MOSS) for WooCommerce
A build-to-order WooCommerce plugin that charges destination-country VAT on digital products sold to EU consumers, captures and stores the required two pieces of location evidence, applies VIES B2B reverse-charge exemptions, and generates MOSS/OSS return data.
Fawry Payment Gateway for WooCommerce
A custom-built WooCommerce payment gateway that adds Fawry pay-at-outlet reference codes, cards, mobile wallets and installments to your checkout. ECOSIRE builds, installs and supports it on your WordPress site.
Flutterwave for WooCommerce
A build-to-order Flutterwave payment gateway for WooCommerce that accepts cards, mobile money, bank transfer and USSD across 30+ African markets. ECOSIRE builds, installs and supports it on your WordPress site.
EU VAT, OSS & Tax Compliance Automation
A custom-built WooCommerce plugin that applies the correct destination EU VAT rate, validates B2B VAT numbers against VIES, exports OSS/IOSS returns and issues compliant sequential invoices — built, installed and supported on your site by ECOSIRE.
- Real-time EU VAT rate selection by ship-to country, applied via WooCommerce tax filters so totals, cart and checkout all stay correct
- VIES VAT number validation at checkout (EU SOAP service) with an AJAX field, caching, and graceful fallback when VIES is temporarily down
- Automatic B2B reverse charge: valid cross-border VAT numbers zero-rate the order and stamp 'VAT reverse charged' on the invoice
- OSS quarterly return exports (CSV/XML) grouped by destination country and rate, ready for your One-Stop-Shop filing