Global VAT/GST Tax Compliance Platform

Key Features

Tax determination across 100+ countries covering VAT, GST and US sales tax, applied per order line at checkout-time logic via the Shopify Admin GraphQL API

VAT ID validation (EU VIES and regional equivalents) with automatic B2B reverse-charge handling for verified business buyers

Webhook-driven capture of every taxable event — subscribes to orders/create, orders/updated and refunds/create so no transaction is missed

Multi-currency tax handling that reconciles each order to your registration currency with jurisdiction-correct rounding rules

Registration-threshold monitoring against EU OSS/IOSS, UK, and US economic-nexus limits, with proactive alerts before a new obligation is triggered

Per-jurisdiction periodic tax reports in filing-ready formats, exportable to CSV and your accounting platform

Order metafields written with the computed tax breakdown so invoices, exports and downstream systems stay in sync

Configurable product tax categories (standard, reduced, zero-rated, exempt) mapped to your catalog during build

Refund and partial-refund tax reversal so credit notes and returns report correctly

Audit log of every tax decision, rate version and VAT-ID check result for defensible record-keeping

Secure OAuth installation scoped to only the read/write permissions the app needs

Admin dashboard inside Shopify showing liability by jurisdiction, period and currency

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 Shopify.

Go live + support

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

About this Product

The Global VAT/GST Tax Compliance Platform is a Shopify app ECOSIRE builds to order for your store — not an instant App Store download. After you purchase, our engineers configure, install and connect it to your specific jurisdictions, registrations and accounting stack, then hand it over with documentation and support.

Cross-border selling means living with VAT in the EU and UK, GST in Australia, India, Canada, New Zealand and Singapore, and US sales tax — each with its own rates, rounding rules, invoice formats and filing calendars. Native Shopify Tax covers common cases but leaves gaps around B2B reverse-charge, VAT ID validation, multi-currency rounding and registration-threshold tracking. This platform closes those gaps.

It hooks into the Shopify Admin GraphQL API and subscribes to orders/create, orders/updated and refunds/create webhooks to capture every taxable event. Tax determination runs against a rate engine covering 100+ countries, with VAT ID validation (VIES for the EU, equivalent checks elsewhere) to apply reverse-charge correctly for verified B2B buyers. Results are written to order metafields so your invoices, exports and downstream systems stay consistent.

Multi-currency orders are reconciled to your registration currency at the booking rate, with jurisdiction-correct rounding. A threshold monitor tracks your turnover per country against registration limits (EU OSS/IOSS, UK, US economic nexus) and alerts you before you trip a new obligation. Period reports are generated per jurisdiction in filing-ready formats, with export to CSV and your accounting platform.

Because it is built to order, the data model, jurisdictions, invoice templates and report formats are tailored to your catalog and registrations — then supported by the people who built it.

What you get

A custom Shopify app built for your store, installed via OAuth with least-privilege scopes

Configured tax rate engine and product tax-category mapping for your catalog and registered jurisdictions

Webhook subscriptions wired to your store (orders/create, orders/updated, refunds/create) with delivery monitoring

VAT ID validation and B2B reverse-charge rules configured for your B2B markets

Threshold-monitoring rules set up for every country you sell into, with alert recipients configured

Filing-ready report templates per jurisdiction plus CSV/accounting-platform export

Admin handover documentation, an architecture overview, and a recorded walkthrough

Post-delivery support window with bug fixes and rate-update guidance

Who this is for

Cross-border DTC founder

Sells into the EU, UK, US and APAC from one Shopify store and needs accurate tax on every order without manually patching rates per country.

Finance / tax manager

Owns the filing calendar and wants filing-ready, per-jurisdiction reports, an audit trail of every tax decision, and early warning before a new registration threshold is crossed.

B2B and wholesale merchant

Ships to VAT-registered businesses across borders and needs reliable VAT ID validation and correct reverse-charge so B2B invoices are compliant.

How Global VAT/GST Tax Compliance Platform Compares

Criterion	ECOSIRE	Custom Build	Competitor
VAT/GST/sales-tax calculation across 100+ countries	Included	Partial support	Included
VAT ID validation and automated B2B reverse-charge	Included	Partial support	Partial support
Registration-threshold monitoring with proactive alerts	Included	Partial support	Partial support
Multi-currency reconciliation to registration currency	Included	Partial support	Partial support
Filing-ready per-jurisdiction periodic reports	Included	Partial support	Included
Tailored to your exact catalog, jurisdictions and accounting stack	Included	Included	Not included
Instant self-serve install from the App Store	Not included	Not included	Included
Dedicated support from the team that built it	Included	Partial support	Partial support

Frequently Asked Questions about Global VAT/GST Tax Compliance Platform

How long until the app is live on my store?

Because this is built to order, it is not an instant install. After purchase we confirm your registered jurisdictions, catalog and accounting stack, then build, configure and install the app. A typical first delivery is around 2 to 4 weeks depending on how many jurisdictions and B2B rules you need; we give you a firm timeline once scope is confirmed.

Do you keep it updated, and what support is included?

Yes. Purchase includes a post-delivery support window covering bug fixes and guidance on rate and threshold updates. Tax rules change constantly, so we offer an ongoing maintenance arrangement for rate updates, new-jurisdiction onboarding and Shopify API version upgrades. We build it and we support it — the same engineers stay with your store.

Why not just use Shopify's native tax settings?

Shopify Tax handles common rate calculation well, but cross-border sellers hit its limits around VAT ID validation, automated B2B reverse-charge, registration-threshold monitoring, multi-currency rounding to a registration currency, and filing-ready per-jurisdiction reports. This platform is built specifically to cover those gaps and integrate with your accounting workflow.

Is this a guarantee that my filings are correct?

No software is a substitute for a tax advisor, and we are honest about that. The platform automates accurate calculation, captures every taxable event, and produces filing-ready reports and a defensible audit trail — which dramatically reduces manual work and error. Your accountant or tax agent still reviews and submits the actual filings.

Will it work with my multi-currency and B2B setup?

Yes. Multi-currency orders are reconciled to your registration currency with jurisdiction-correct rounding, and B2B orders run through VAT ID validation so reverse-charge is applied only for verified business buyers. These rules are configured to your specific markets during the build, not assumed.