The right tax rate. Every transaction. Everywhere.
One API. Every tax rule. Real-time tax calculation across 76 countries — from US state sales tax to EU VAT multi-band rates — accurate to the jurisdiction.
Tax is complex everywhere.
Most platforms only get one market right.
Calculate. Classify. Invoice. Report. Four steps, one API.
invoicing and real-time reporting — no copy-paste between systems, no
manual rate lookup, no reconciliation errors.
Send your line items
Product classification determines the rate
B2B/B2C and cross-border rules applied
Result feeds into your e-invoice
translation layer.
What Taxually Tax Calculation covers
US sales tax — all 50 states, all local jurisdictions
Canadian GST/HST/PST — every province handled
EU VAT — full Annex III multi-band support
AI-assisted product classification
EN16931 tax codes for e-invoicing
76 countries — all on one API
Tax calculated correctly. Invoice submitted. Return filed. One API.
Tax Calculation
E-Invoicing
Real-Time Reporting
See it in action
Form styling
Tax Calculation questions, answered
Does Taxually cover US sales tax across all 50 states?
Yes. Taxually calculates sales tax for all 50 US states and over 13,000 tax jurisdictions, including state, county, city, and special district rates. The API automatically determines the correct tax rate based on product type and destination address, applying jurisdiction-specific rules and exemptions in real time through a single API call.
How does Taxually handle Canadian tax — GST, HST, PST, and QST?
Taxually applies the correct Canadian tax type automatically based on the buyer's province. This includes 5% federal GST, combined HST rates in participating provinces such as 13% in Ontario, provincial PST where applicable, and Quebec's QST. The API handles interprovincial transactions and determines which taxes apply based on place of supply rules.
How does AI product classification work? Can I override it?
Taxually uses AI-powered product classification to assign the correct tax code to each item based on its description. The system maps products to jurisdiction-specific tax categories, including reduced rates and exemptions. You can override any AI-assigned classification manually, set fixed tax codes for specific products, or define custom rules to match your business needs.
Does Taxually support EU VAT and multi-band rates?
Yes. Taxually supports EU VAT across all 27 member states, including standard, reduced, super-reduced, parking, and zero rates. The API automatically applies the correct VAT rate based on product type, transaction location, and applicable EU directives. It handles distance selling thresholds, the One-Stop Shop (OSS) scheme, and country-specific VAT rules for digital services, goods, and B2C cross-border sales.
How does Taxually handle reverse charge for intra-EU B2B transactions?
Taxually automatically applies the reverse charge mechanism for intra-EU B2B transactions when both parties have valid VAT identification numbers. The API validates VAT IDs in real time through the VIES system, determines when reverse charge applies based on the transaction type and parties involved, and generates compliant invoices with the correct reverse charge notation.
Does tax calculation integrate directly with Taxually e-invoicing?
Yes. Taxually's tax calculation API integrates directly with its e-invoicing platform, creating a seamless compliance workflow. Calculated tax amounts, rates, and classifications flow automatically into e-invoices formatted to meet country-specific requirements such as EN16931, Peppol, and local mandates. This eliminates manual data transfer and ensures tax data consistency across calculation and invoicing.