Monk automates invoice submission across 600+ AP portals

Monk automates invoice submission across 600+ AP portals

Most Fortune 500 companies no longer accept invoices by email. Instead, they require suppliers to submit through designated accounts payable portals—systems like Ariba, Coupa, Bill.com, Tipalti, and Workday that their own AP teams have chosen. For vendors serving hundreds of enterprise customers, that requirement creates a hidden operational burden: maintaining logins across dozens of different portals, manually keying in invoice data, and chasing down rejections and credential checks.

Monk, an AI-native accounts receivable platform, announced August 14 that it now automates that entire workflow. The company has built direct integrations to more than 600 corporate AP portals and can register suppliers as vendors, submit invoices into buyers' procurement systems, and resolve the exceptions that typically prevent invoices from being accepted. According to the company, the platform handles 87% of invoice uploads autonomously, with exceptions managed internally rather than escalated to finance teams.

Why it matters

The shift to mandatory portal submission is accelerating payment delays across B2B commerce. When an invoice isn't entered into a buyer's designated system, the payment clock never starts—no reminder email will trigger action, and the receivable simply ages. Monk's proprietary data shows that 92% of enterprise invoices it manages must now be submitted through a vendor portal rather than paid from an emailed PDF. Meanwhile, 43% of total U.S. B2B invoice value is overdue, and only 52% is paid on time, according to 2025 data from Atradius. As eight major economies mandate or expand e-invoicing requirements in 2026, the number of systems suppliers must navigate to collect payment is growing, not shrinking.

The manual cost of portal compliance

The scale of manual work remains significant. As of 2026, 68% of finance teams still manually key invoices into systems, and fewer than one-third have automated the process, according to DocuClipper. For a supplier with 200 enterprise customers, that can mean maintaining workflows across 30 to 40 different portals. The global e-invoicing market is projected to grow roughly 28% annually through 2028, per Tungsten Automation, suggesting the compliance burden will intensify.

Monk manages more than $2 billion in receivables and uses that dataset to train its automation. The platform now covers the full lifecycle of portal submission: vendor onboarding, invoice formatting to match each system's requirements, upload execution, and resolution of rejections or missing credentials.

Broader AR automation context

The announcement positions Monk within a broader wave of AI-driven finance automation, particularly in accounts receivable where payment friction has historically been high. Five percent of U.S. B2B invoice value is now written off entirely, underscoring the cost of collection failures. By removing the manual bottleneck at the point of invoice submission, Monk aims to compress days sales outstanding and reduce the operational overhead that grows with customer count.

Details were first reported in a press release distributed by Monk on August 14, 2026.