イメージプレビュー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.
EU VAT, OSS & Tax Compliance Automation for WooCommerceとは？
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.
主な機能
受注生産、すべておまかせ
自分での設定は不要 — ECOSIRE が構築・インストール・サポートする実働アプリです。
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ご注文
一回限りの構築料金から始めます。キックオフで一緒に範囲を決めます。
- 2
構築とインストール
ECOSIRE がお客様の WooCommerce 上で構築・設定・インストールします。
- 3
本番稼働 + サポート
約1週間（営業日ベース）で稼働し、本番稼働後2週間のサポートが付きます。納品したコードの不具合は無償で修正します。
この製品について
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.
得られるもの
- 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
これは誰のためのものですか
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.
EU VAT, OSS & Tax Compliance Automation for WooCommerce の比較方法
| 基準 | エコシエール | カスタムビルド | 競合他社 | WooCommerce 標準機能 |
|---|---|---|---|---|
| Live destination-country EU VAT rate at checkout | 付属 | 付属 | 付属 | 部分的なサポート |
| VIES B2B VAT validation with automatic reverse charge | 付属 | 部分的なサポート | 部分的なサポート | 含まれていない |
| OSS / IOSS quarterly return exports | 付属 | 部分的なサポート | 部分的なサポート | 含まれていない |
| Digital-goods VAT MOSS handling | 付属 | 部分的なサポート | 部分的なサポート | 含まれていない |
| Gap-free compliant sequential invoice numbering | 付属 | 付属 | 部分的なサポート | 含まれていない |
| HPOS / custom-order-table compatible VAT metadata | 付属 | 部分的なサポート | 部分的なサポート | 付属 |
| Installed, configured and supported on your site | 付属 | 付属 | 含まれていない | 含まれていない |
| Tailored to your registration state, product mix and invoice format | 付属 | 付属 | 含まれていない | 含まれていない |
| Instant self-service download | 含まれていない | 含まれていない | 付属 | 付属 |
| You own single-tenant code with no per-order SaaS fees | 付属 | 付属 | 部分的なサポート | 付属 |
EU VAT, OSS & Tax Compliance Automation に関するよくある質問
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.
関連モジュール
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.
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