Quaderno-Style Global Tax & Invoicing for WooCommerce

Key Features

Worldwide automatic tax determination at checkout (EU VAT, UK VAT, GST for AU/NZ/IN/CA, US sales tax) keyed off billing country, IP geolocation, and product tax class via woocommerce_calculate_totals and tax-class filters

Compliant invoice and receipt generation as a locked, gap-free sequential custom post type, rendered to PDF and delivered through WooCommerce transactional email on woocommerce_order_status_completed

Automatic credit notes / refund documents generated when an order is refunded or partially refunded, keeping your audit trail consistent

B2B reverse-charge handling with live VIES VAT-number validation for EU buyers, applying the correct 0% rate and statutory exemption wording on the invoice

Per-country registration-threshold tracking via a scheduled WP-Cron job (EU OSS €10,000, UK, and US economic-nexus thresholds) with wp-admin dashboard warnings before you cross

Multi-currency, multi-jurisdiction tax reporting with CSV export grouped by country and tax type for VAT/OSS returns and sales-tax filings

HPOS (High-Performance Order Storage / custom order tables) compatible, plus legacy post-meta order support detected automatically

Digital-goods and SaaS aware: applies place-of-supply rules for downloadable/virtual products and supports subscription renewals via WooCommerce Subscriptions hooks

WPML / Polylang multilingual invoices and WordPress multisite network support so each store or language gets correctly localized tax documents

Configurable wp-admin settings screen for tax rules, invoice templates, company VAT IDs, fallback rates, and per-country overrides — no code edits needed for routine changes

Customer-facing invoice download from the My Account → Orders endpoint, plus admin re-issue and bulk export from the order list

Exposes data through the WooCommerce REST API and custom endpoints so invoices and tax totals can sync to your accounting tool or be pulled by a bookkeeper

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

Selling digital goods or SaaS across borders means WooCommerce core can't keep up: it ships flat, manual tax tables, no concept of EU VAT MOSS/OSS thresholds, no reverse-charge logic, and no compliant invoice numbering. Quaderno-Style Global Tax & Invoicing for WooCommerce is a custom plugin ECOSIRE builds to your store's exact rules — a Quaderno-class tax and invoicing engine that lives inside your own WordPress install, with no third-party SaaS subscription required.

At checkout, the plugin hooks into woocommerce_calculate_totals and woocommerce_product_get_tax_class to determine the correct rate from the customer's billing/IP country, product type, and B2B status — applying VAT, GST, or US sales tax automatically. For B2B EU orders it runs VIES VAT-number validation and applies reverse-charge with the right exemption note. Every paid order triggers a sequential, gap-free compliant invoice (custom post type, locked numbering) rendered to PDF and emailed via WooCommerce's transactional mail, with credit notes on refund.

It is HPOS-aware (custom order tables), works with WPML/Polylang for multilingual invoices, and is multisite-friendly. A WP-Cron job tracks your registration-threshold progress per country (e.g. EU OSS €10,000, UK, US economic nexus) and warns before you cross. Tax and revenue reports export per jurisdiction (CSV) for filing.

ECOSIRE builds, installs, and configures this on your site, then provides ongoing support and rate-table updates. It is not an instant marketplace download — it is engineered to your catalog, gateways, and the countries you actually sell into. Tax determination is software, not legal advice — final filings stay with your accountant.

What you get

A custom WooCommerce plugin packaged as a standard WordPress plugin (zip), installed and activated on your site by ECOSIRE

Configuration of tax rules, registration numbers, and invoice templates for every country and product type you sell into

Branded invoice, receipt, and credit-note PDF templates matching your company details and logo

WP-Cron threshold-tracking and reporting set up and verified against your current sales data

Staging-first deployment with HPOS/WPML/multisite compatibility checks before go-live on production

Handover documentation plus an admin walkthrough, with a defined post-launch support and rate-update window

Who this is for

Cross-border digital-goods seller

Sells ebooks, templates, plugins, or downloads worldwide on WooCommerce and is now liable for EU VAT, UK VAT, and other place-of-supply rules they can't track manually.

WooCommerce SaaS / subscription founder

Runs recurring billing via WooCommerce Subscriptions and needs correct tax on renewals, B2B reverse-charge, and clean compliant invoices for every billing cycle.

Finance lead at a scaling store

Owns VAT/OSS and sales-tax filings, wants per-jurisdiction reports, threshold alerts, and gap-free invoice numbering instead of reconciling spreadsheets each quarter.

How Quaderno-Style Global Tax & Invoicing for WooCommerce Compares

Criterion	ECOSIRE	Custom Build	Competitor
Worldwide automatic tax determination (VAT/GST/sales tax) at checkout	Included	Partial support	Partial support
Compliant, gap-free sequential invoice + receipt PDFs	Included	Partial support	Included
B2B reverse-charge with live VIES VAT validation	Included	Partial support	Partial support
Per-country registration-threshold tracking & alerts	Included	Not included	Partial support
Multi-jurisdiction tax reporting / CSV export for filings	Included	Partial support	Included
Built to your exact catalog, gateways & countries	Included	Included	Not included
No per-transaction or monthly third-party SaaS fee	Included	Included	Not included
Installed, configured & supported for you (HPOS/WPML/multisite)	Included	Partial support	Not included

Frequently Asked Questions about Quaderno-Style Global Tax & Invoicing for WooCommerce

How long does delivery take, since this isn't an instant download?

This is built to order. After a short scoping call to confirm the countries you sell into, your gateways, and whether you use HPOS, WPML, or Subscriptions, ECOSIRE typically delivers a configured, staging-tested build in about 2 to 4 weeks. We install and verify it on a staging copy of your site first, then schedule production go-live with you. There is no marketplace link — you receive the plugin installed and working on your own WordPress site.

What ongoing support and updates do I get?

Every build includes a post-launch support window for bug fixes and configuration help, plus periodic tax-rate-table updates as jurisdictions change rates or thresholds. We test compatibility against new WooCommerce and WordPress releases (including HPOS changes) and can extend support under a maintenance arrangement. Because the plugin lives on your server with no third-party SaaS dependency, there is no per-transaction or monthly tax-engine fee.

Does it work with HPOS, WPML, and WooCommerce Subscriptions?

Yes. The plugin is built HPOS-aware (it reads and writes the custom order tables and falls back to legacy post-meta when HPOS is off), generates localized invoices through WPML or Polylang, and hooks into WooCommerce Subscriptions renewal events so tax is recalculated correctly on each renewal. We confirm your exact extension stack during scoping.

Is this real legal tax compliance, or just rate calculation?

It automates tax determination, compliant invoice numbering, reverse-charge logic, and per-jurisdiction reporting based on the rules and registrations you provide. It is software, not legal or accounting advice. We configure it to current rules and keep rate tables updated, but registering for VAT/GST, validating thresholds, and submitting returns remain the responsibility of you and your accountant.

Can it handle B2B EU sales and VAT-number validation?

Yes. For B2B EU orders the plugin validates the buyer's VAT number against the VIES service at checkout, and when valid applies the reverse-charge mechanism — a 0% rate with the correct statutory exemption note printed on the invoice. Invalid or missing numbers fall back to standard destination-country VAT so you stay compliant either way.

Will it slow down my checkout or store?

Tax determination runs on the existing WooCommerce totals calculation, and heavy work like threshold tracking and report aggregation is offloaded to a scheduled WP-Cron job rather than the checkout request. VIES lookups are cached to avoid repeated external calls. On a properly hosted store the customer-facing checkout impact is negligible.