Basware Analysis shows UK businesses are sitting on an e-invoicing compliance landmine

UK businesses are heading towards an e-invoicing compliance crunch, with new Basware analysis revealing widespread reliance on outdated invoicing methods and a growing risk of fines, rejected invoices and stalled growth.

London, May 27 – Over half (56%) of finance leaders claim compliance failures have already prevented overseas expansion for their business, with pressure ramping up for UK businesses, in particular, ahead of the 2029 mandatory e-invoicing mandate.

Led by HMRC, the proposed mandate will require all VAT-registered UK businesses to issue and receive structured electronic invoices, replacing PDFs and paper-based systems. With more guidance expected later in 2026 autumn budget, finance leaders have a narrowing window to assess readiness and act or risk being forced into rushed, reactive change.

Businesses in the UK face a growth crossroads, where unlocking greater efficiency is becoming a competitive advantage. Yet, 57% of invoices globally still arrive in PDF or paper format, according to an analysis of 272 million invoices conducted by Basware.

The readiness gap facing businesses

Thousands of businesses are unprepared for the mandate, facing the need for a fast overhaul of invoicing systems to prevent significant legal and financial damage.

Over one-third (36%) of businesses have already incurred fines due to incorrect tax audits, while 39% have had invoices rejected due to tax or invoicing compliance errors, according to Basware’s Beyond the Checkbox: Compliance as Strategy research of 400 global finance leaders, conducted with FT Longitude.

Abigail Myers-Antiaye, VP of Global Compliance, Basware commented:

“UK businesses are significantly underestimating what this shift means, with PDF, email and paper still being widely used as a common invoicing method. Many finance teams are effectively building compliance risks into their day-to-day operations. As e-invoicing becomes mandatory, this is no longer a future concern, but a present-day readiness gap, which will directly impact operational continuity, cross-border trade, and growth opportunities if left unaddressed.”

Overcoming the compliance risks

Visibility is one of the most significant challenges facing CFOs, with 91% citing it as a major operational risk.

Leaders reported reputational harm due to compliance failures, fines and penalties from regulatory failures and fraudulent activity related to invoicing or reporting as their most common outcome from subpar e-invoicing.

“When finance teams lack visibility across the full invoice lifecycle, compliance risks multiply. E-invoicing gives organizations the control and clarity they need to reduce avoidable errors and strengthen financial governance,” Myers-Antiaye, added.

As HMRC moves closer to formalizing the UK’s e-invoicing framework, Basware is urging finance leaders to treat compliance as a strategic business priority rather than a back-office obligation. Those that act early stand to improve efficiency, strengthen resilience and unlock international growth opportunities, while late adopters risk mounting penalties, rejected invoices and costly operational disruption.

Media Contact

Basware
Abs Hassanali
Global Head of PR & Communications
abs.hassanali@basware.com

About Basware

Basware is how the world's best finance teams gain complete control of every invoice, every time. Our Intelligent Invoice Lifecycle Management Platform ensures end-to-end efficiency, compliance and control for all invoice transactions. Powered by the world's most sophisticated invoice-centric AI – trained on over 2 billion invoices – Basware's Intelligent Automation drives real ROI by transforming finance operations. We serve 6,500+ customers globally and are trusted by industry leaders including DHL, Heineken and Sony. Fueled by 40 years of specialized expertise with $10+ trillion in total spend handled, we are pioneering the next era of finance. With Basware, now it all just happens.