End of Tax Year Checklist for UK Small Business Owners

Why the End of Tax Year Matters for UK Small Businesses

The UK tax year runs from 6th April to 5th April, and getting your records in order before the deadline can save you significant time, money, and stress. Whether you are a sole trader, limited company director, or VAT-registered business, there are specific steps you should take every year to stay compliant with HMRC.

With Making Tax Digital (MTD) now firmly embedded in UK tax compliance, having the right accounting software in place is no longer optional — it is essential. This checklist walks you through the key actions to take before and after the tax year closes.

Step 1 — Reconcile Your Accounts and Bank Feeds

Before anything else, ensure your bookkeeping is fully up to date. Every transaction should be categorised, and your software's bank feed should match your actual bank statements to the penny. Unexplained discrepancies are a red flag for HMRC and can cause costly delays.

If you are using Xero (from £15/mo), its UK bank feed integrations connect directly with major UK banks including Barclays, HSBC, and Lloyds, making reconciliation straightforward. FreeAgent (from £19/mo) and Sage Accounting (from £15/mo) both offer similarly robust real-time bank feeds tailored to UK businesses.

Step 2 — Check Your VAT Compliance and MTD Submissions

If your business is VAT-registered, confirm that all VAT returns for the tax year have been submitted correctly via Making Tax Digital-compatible software. HMRC now requires digital links throughout the entire VAT process, so manually keying figures between systems is no longer acceptable.

Xero, FreeAgent, and Sage Accounting are all fully MTD-compliant, with built-in VAT submission tools that file directly to HMRC. FreeAgent in particular has HMRC submission built in, which is ideal for sole traders and small limited companies who want an all-in-one solution without additional bridging software.

Step 3 — Review Your Invoices, Expenses, and Outstanding Payments

Chase any unpaid invoices before the tax year ends, as outstanding debts can affect your tax position. Equally, ensure all allowable business expenses have been logged — missing even small deductions adds up over time.

For service-based businesses managing multiple clients and jobs, Jobber (£49/mo) is an excellent choice for keeping invoices and job records tidy throughout the year. If you are in the trades — such as plumbing or electrical work — Commusoft (£119/mo) combines scheduling, invoicing, and CRM so nothing slips through the gaps. For businesses with simpler needs, Square's free tier covers payments and invoicing with no monthly fee.

Step 4 — Prepare Key Financial Reports

Your accountant or tax adviser will need several core reports to complete your Self Assessment or Corporation Tax return. Make sure these are ready and accurate before your year-end meeting.

• Profit and Loss (P&L) statement — summarises income and expenses for the year
• Balance sheet — shows your assets, liabilities, and equity at year end
• Aged debtors and creditors report — highlights outstanding invoices owed to and by you
• Mileage and expenses log — essential for sole traders claiming vehicle costs
• Payroll records — if you employ staff, ensure RTI submissions are complete

All three recommended accounting platforms — Xero, FreeAgent, and Sage Accounting — generate these reports automatically, saving considerable time at year end.

Step 5 — Review Your Payment Processing Records

If you take card payments in person or online, ensure your payment processor records reconcile with your accounting software. Zettle and SumUp are both popular UK card reader solutions for small businesses, and both integrate with leading accounting platforms. Square goes a step further by combining payments, invoicing, and scheduling in a single free-to-use platform, which simplifies year-end reconciliation considerably.

Cross-referencing payment records with your invoicing software helps identify any transactions that were processed but never invoiced — a common source of lost revenue for small businesses.

Step 6 — Plan Ahead for the New Tax Year

Once the current year is closed, take time to review your software setup. Are you still on a manual spreadsheet? Is your current tool actually MTD-compliant? Could you save hours each month with better automation?

All of the platforms mentioned in this guide offer free trials with no credit card required — Xero offers 30 days, and FreeAgent also provides a free trial period. Use the start of the new tax year as an opportunity to switch to a system that genuinely supports your business, keeps you GDPR-compliant in how it handles client data, and grows with you throughout the year.