Classify every transaction with AI. Apply deterministic tax rules across 103+ jurisdictions. Return ERP-ready tax codes via API.
Plus optional modules for SaaS: EU VAT exposure analysis & Non-Union OSS filing.
Legacy engines like Avalara and Vertex depend on static rule tables and manual tax-code mapping maintained by analyst teams. DeterminedAI uses AI to characterize each transaction in context — goods, digital services, consulting, financial services, place of supply, reverse charge — and then applies deterministic tax rules across 103+ jurisdictions. The result: accurate tax codes returned to your ERP in milliseconds, with a fraction of the implementation cost.
Built on top of the determination engine, this module is tailored for US-based SaaS companies selling into the EU. Connect Stripe to get a free VAT exposure dashboard, then upgrade to handle Non-Union OSS registration with Irish Revenue and automated quarterly EU OSS returns via your ROS Digital Certificate.
Try the free exposure check →The core product is a VAT/GST determination engine for ERP systems. SaaS-specific exposure and OSS filing are optional add-ons.
Submit your transactions. Our AI classifies each one for VAT/GST treatment — goods, digital services, consulting, financial services — based on the full transaction context, not a static rule table.
Returns tax calculations in the exact format your ERP expects. NetSuite (SuiteTax), SAP S/4HANA, Microsoft Dynamics 365, Xero, Sage Intacct, and QuickBooks Online — plus a Raw API for any system.
Real-time VAT/GST calculations on every transaction across 103+ jurisdictions. Place-of-supply rules, reverse charge, exemptions, and zero-rating — all handled automatically.
Every determination returns the applied rule, citation, and confidence score. Full audit trail for finance and tax teams — no more manual tax code reconciliation.
For SaaS companies: connect Stripe and see which EU jurisdictions you have crossed VAT registration thresholds in. Free tier available.
For SaaS companies selling into the EU: guided Non-Union OSS registration with Irish Revenue and automated quarterly return filing via your ROS Digital Certificate.
Integrate via native connector or our Raw API — NetSuite, SAP, Dynamics, Xero, and more
Each transaction gets a VAT/GST supply-type classification with citations
Review AI suggestions, approve or override — the engine learns your conventions
Your ERP calls our API for instant, ERP-ready tax codes across 103+ jurisdictions
Practical guides for US SaaS founders and finance teams handling EU VAT.
Complete walkthrough of VAT obligations for US-based SaaS companies selling internationally.
Union OSS vs. Non-Union OSS vs. IOSS — which scheme applies to you and how to register.
Place-of-supply, B2B vs B2C treatment, destination-principle VAT rates for digital services.
How to reconcile Stripe data against EU VAT obligations and automate OSS filings.
When the buyer accounts for VAT instead of the seller, and why VIES validation matters.
Honest comparison of four tax-tech approaches — which fits a US SaaS selling into the EU.
Yes. If you sell digital services (SaaS, downloads, cloud subscriptions) to EU consumers (B2C), you must register for VAT on the very first sale — there is no turnover threshold for non-EU sellers. The Non-Union OSS scheme lets a single registration cover all 27 member states with one quarterly return.
Non-Union OSS is an EU VAT simplification for businesses established outside the EU. Instead of registering for VAT in every EU member state where you have customers, you register once (typically in Ireland via ROS) and file a single quarterly return covering all EU B2C supplies. DeterminedAI automates both the registration and the quarterly filings.
For B2C digital services, you charge the VAT rate of the customer's country (the "destination principle"). Standard rates range from 17% (Luxembourg) to 27% (Hungary). For B2B sales to a VAT-registered business, the reverse-charge applies — you do not charge VAT, but you must validate the buyer's VAT number via VIES.
Legacy engines (Avalara, Vertex) rely on static rule tables and manual tax code mapping. DeterminedAI uses AI to characterize each transaction in context, then applies deterministic tax rules — faster onboarding, broader coverage, lower cost. Fonoa focuses on e-invoicing; DeterminedAI focuses on VAT determination plus end-to-end OSS compliance for US SaaS. See full comparison →
Yes. Our free Exposure Dashboard reads your Stripe transactions to surface which jurisdictions you've crossed registration thresholds in. Paid plans use the same feed to calculate VAT owed per EU member state and auto-file your quarterly OSS return.
Irish Revenue grants OSS registration effective from the first day of the quarter in which you submit the application. They do not backdate. Any EU B2C sales before your effective date fall outside OSS and may need separate resolution — DeterminedAI surfaces this gap during the wizard.
NetSuite (SuiteTax), Xero, Sage Intacct, QuickBooks Online, Microsoft Dynamics 365, and SAP S/4HANA. We also expose a Raw API that accepts standard transaction payloads and returns ERP-ready tax codes for any system.
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