For UK small businesses, 2027 is shaping up to be a busy year for finance and admin. New late payment rules are moving through Parliament, Making Tax Digital for Income Tax reaches hundreds of thousands more sole traders and landlords, and HMRC’s work on digital invoicing moves from planning to detailed rules.
Together, these changes push small firms in the same direction: faster payments, digital records and invoices that flow through software rather than inboxes. Here is what is coming and how to prepare.
A New Era for Late Payments
Late payment is one of the biggest problems for UK SMEs. The government estimates that small businesses spend an average of 86 hours a year chasing overdue invoices. In May 2026, it introduced the Small Business Protections (Late Payments) Bill, first announced as the Commercial Payments Bill, describing it as the largest crackdown on late payments in over 25 years.
The bill is not yet law, and most measures will need start dates set by regulations. The government has said the main payment cap will start no earlier than 2027. The key proposals are:
- A 60-day cap on payment terms for large businesses paying smaller suppliers, with limited exemptions.
- Compulsory statutory interest on late payments at 8% above the Bank of England base rate, with no option to contract out of it.
- Clearer rules on invoice disputes, so customers cannot use late or vague disputes to delay payment.
- Stronger powers for the Small Business Commissioner, including the ability to investigate, adjudicate disputes and fine persistent late payers.
- Greater transparency, with boards of persistently late-paying large companies required to explain their performance.
For small suppliers, this is good news. But it also raises the bar for their own invoicing. To benefit from tighter payment terms, an invoice must be correct, complete and easy for the customer to approve. An invoice with a missing purchase order number or the wrong VAT detail gives a customer a legitimate reason to pause payment.
Many small businesses are also buyers. Those that supply larger firms may sit in long supply chains where payment discipline will tighten from the top. Getting supplier invoices approved and paid on time will matter more for supplier relationships.
Making Tax Digital for Income Tax Expands
Making Tax Digital (MTD) for Income Tax started on 6 April 2026 for sole traders and landlords with qualifying income above £50,000. From 6 April 2027, the threshold falls to £30,000, based on income in the 2025 to 2026 tax year. It will fall again to £20,000 in April 2028.
Those in scope must keep digital records of income and expenses, use compatible software and send quarterly updates to HMRC. For many sole traders, this is the first time their bookkeeping must be fully digital.
The practical lesson is simple: records are easiest to keep when they are created digitally from the start. Invoices issued from accounting software, and supplier bills captured electronically, flow straight into the records MTD requires.
Digital Invoicing Moves From Plan to Detail
HMRC confirmed in October 2026 that structured e-invoicing will eventually become the standard for VAT invoices between VAT-registered businesses. The longer-term start date is still some way off, but 2027 is when much of the important detail will be settled.
A technical consultation and enabling legislation are planned for spring 2027. From October 2027, HMRC expects to start publishing detailed requirements, including scope, exemptions, technical standards and the business identifiers that will be accepted. The UK has already chosen Peppol, an international network for exchanging invoices, as its core standard.
Some small businesses are already using it. Suppliers to NHS England, for example, are expected to invoice through Peppol-compatible systems. For others, 2027 is the right time to understand what their accounting software plans to offer, rather than waiting for final deadlines.
What These Changes Have in Common
Late payment reform, MTD and digital invoicing share one theme: the move from documents to data. A PDF invoice has to be read, typed into a system and checked by a person. A structured invoice can be validated, matched and approved by software in minutes.
For small finance teams, this is the biggest opportunity of 2027. On the sales side, accurate digital invoices reduce disputes and support faster payment. On the purchasing side, ap automation tools can capture supplier invoices, match them to orders, route them for approval and schedule payments on time. Both sides feed clean data into the digital records that HMRC increasingly expects.
A 2027 Checklist for Small Businesses
- Review your payment terms. Check the terms you offer and receive. Identify large customers who pay later than 60 days and prepare for conversations once the new rules apply.
- Tighten invoice quality. Make sure every invoice includes purchase order numbers, correct VAT details and clear payment terms. Fewer errors mean fewer excuses for delay.
- Know your interest rights. Understand how statutory interest on late payments works today, and how compulsory interest will change it.
- Check your MTD position. If you are a sole trader or landlord, compare your 2025 to 2026 qualifying income with the £30,000 threshold and choose compatible software early.
- Digitise supplier bills. Stop retyping invoices from email attachments. Capture them electronically and connect them to your approval process.
- Ask your software provider about Peppol. Find out whether your accounting system can send and receive structured invoices, and what its plans are as HMRC’s rules develop.
- Clean your customer and supplier data. Accurate company names, VAT numbers and addresses underpin MTD, faster payments and digital invoicing alike.
Choosing the Right Tools
Most small businesses will meet these changes through the accounting software they already use. As volumes grow, or as firms trade with larger customers and across borders, specialist tools for invoice exchange and accounts payable can add more automation and control. Providers such as RTC Suite, which follow UK and European e-invoicing developments closely, are among the options growing businesses can compare when they review their finance processes.
Conclusion
2027 will not bring one single deadline for UK SMEs, but several changes that point the same way. Late payment reform will reward businesses that invoice accurately and pay suppliers on time. MTD for Income Tax will bring many more sole traders into digital record-keeping. HMRC’s e-invoicing work will set the rules for the next stage of digital tax. Small businesses that start digitising their invoices and approvals now will be better protected, better paid and better prepared.
