Tax Engines x Virto Commerce
B2B enterprises with complex tax requirements across multiple jurisdictions need a dedicated tax engine, not tax logic hardcoded into commerce. Virto Commerce’s pluggable tax provider architecture allows any tax engine to connect through a standard interface, keeping tax calculation in a specialized system where it belongs.
About Tax Engines
A tax engine is a specialized platform that calculates indirect taxes — sales tax, VAT, GST, excise tax — across jurisdictions, product types, and transaction contexts. Unlike ERP or commerce platforms that handle tax as a secondary function, dedicated tax engines maintain continuously updated rate and rule databases across thousands of jurisdictions, handling the complexity that comes with operating in multiple markets.
For B2B commerce specifically, tax engines handle scenarios that generic tax tables cannot: exemptions, reseller certificates, use tax, product-specific taxability, and account-level tax treatment that varies by buyer type or location.
How Virto Integrates with Tax Engines
Virto Commerce’s tax module is built around a pluggable ITaxProvider interface that allows any tax engine to connect to Virto’s checkout and order workflows without modifying the commerce platform itself. Tax engines implement this interface to receive transaction data from Virto at checkout and return calculated tax amounts in real time.
Virto includes a built-in FixedRateTaxProvider for simple, fixed-rate tax scenarios. For enterprises needing real-time jurisdiction-aware tax calculation, an external tax engine connects through the same interface. Avalara AvaTax is the confirmed native integration, officially certified by Avalara as compatible with the Avalara API. Other tax engines including ONESOURCE can connect through the same ITaxProvider architecture.
Tax providers are configured at the store level in Virto’s admin interface, allowing different tax engines to be used for different stores where required.
Note: Speak with a solution partner to confirm integration approach and availability for your specific tax engine.
Implementation Approach
Virto Commerce integrates with enterprise systems through a combination of APIs, middleware, and integration accelerators — designed to reduce implementation effort while preserving the flexibility that enterprise-specific workflows require.
Key considerations: which tax engine is already in use or being evaluated, which jurisdictions and tax types need to be covered, how product taxability is mapped between Virto’s catalog and the tax engine, and whether the built-in FixedRateTaxProvider is sufficient for simpler tax scenarios.
Use Cases
Automating tax calculation across multiple jurisdictions
B2B enterprises on Virto selling across multiple states or countries need tax calculated accurately on every transaction without maintaining rate tables internally. Connecting a tax engine through Virto’s ITaxProvider interface routes each transaction to the engine for real-time calculation, with rates and rules maintained by the tax engine provider.
Tax calculations are accurate across jurisdictions without Virto’s commerce layer holding or maintaining tax logic, and without commerce teams monitoring regulatory changes manually.
Handling B2B-specific tax complexity
B2B transactions often involve exemptions, reseller certificates, use tax, and account-specific tax treatment that fixed-rate tables cannot handle. A dedicated tax engine connected to Virto through the ITaxProvider interface handles that complexity at the engine level rather than requiring custom logic inside commerce.
Complex B2B tax scenarios are handled by a purpose-built tax engine, keeping commerce logic clean and reducing compliance risk on transactions with non-standard tax treatment.
Replacing a fixed-rate tax setup as the business scales
Organizations that started with Virto’s built-in FixedRateTaxProvider for simple domestic tax scenarios can connect a dedicated tax engine as their market footprint grows, without changing Virto’s commerce architecture. The same ITaxProvider interface handles both.
Tax capability scales alongside business growth without requiring a commerce platform change or a rebuild of the tax integration layer.