The UK’s move to mandatory e-invoicing by April 2029 marks a major shift for SMEs, but businesses do not need to overhaul systems immediately. Instead, the priority should be building strong foundations now by improving invoice data, VAT processes, software capability, supplier and customer records, approval workflows, and payment controls. While many SMEs believe they understand e-invoicing, HMRC research shows adoption remains low and that emailed PDFs are still widely mistaken for true structured e-invoicing. Businesses that prepare early will be far better placed to adapt once the final UK rules and standards are confirmed.
