Medius Integrated Avalara AvaTax for Automated Compliance

The new integration allows businesses to automatically verify sales and use tax accuracy on invoices before payment.

Updated on Sept. 28, 2026 in Software

Isometric editorial illustration featuring a brass scale and a geometric cube, representing automated tax compliance verification. — Medius has integrated Avalara AvaTax into its AP automation platform, enabling companies to automatically verify tax compliance on invoices prior to payment. AI Illustration. Upload story photo >

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Medius has integrated Avalara AvaTax into its AP Automation platform to streamline tax verification processes. This tool automatically checks vendor-charged sales and use taxes against Avalara services to ensure accuracy before invoices are posted to an ERP system.

Why it matters

Automating tax verification during the approval workflow helps companies avoid overpayments and unexpected tax liabilities. By identifying discrepancies early, businesses can eliminate the need for costly and time-consuming post-payment tax recovery efforts.

The integration processes invoice tax verification on a line-by-line and jurisdiction-by-jurisdiction basis. It is supported by a shared base of more than 250 mutual customers.

The players

Medius

Medius is a software company that provides cloud-based accounts payable automation and invoice processing solutions.

Avalara

Avalara is a technology company that specializes in providing automated tax compliance software and services.

The details

The integration flags potential tax overcharges or undercharges automatically within the Medius workflow. By validating taxes against Avalara services before payment approval, the system ensures compliance across various US tax jurisdictions.

Medius integrated Thomson Reuters ONESOURCE in September 2026.
The Medius team exhibited at Avalara CRUSH 2026 from September 20-24, 2026.
Medius announced the Avalara AvaTax integration on September 28, 2026.

The Tech Race

This integration follows a pattern set by the Medius AP Automation invoice approval workflow by embedding critical compliance steps directly into automated financial processing. It marks an expansion of Medius's tax strategy, which recently added integration support for Thomson Reuters ONESOURCE.

Finance teams can move away from manual tax reviews, reducing the administrative burden during invoice processing. This reduces the risk of human error in tax calculation, helping companies maintain cleaner accounting records.

The takeaway

Automating tax compliance at the point of invoice approval acts as a vital safeguard against tax leakage and regulatory audit risks. Businesses should prioritize integrating their tax engines directly with procurement platforms to maintain financial accuracy throughout the payment lifecycle.