DEADLINES

The self-assessment deadline survival guide for busy businesses

Miss the 31 January deadline and HMRC charges you £100 on day one — then more. Here’s how to have every receipt filed and ready months ahead, automatically.

1 Jul 2026 · 6 min read · Reviewed by a chartered accountant

The easiest way to survive self-assessment is to stop treating January as the month when bookkeeping begins. Give every invoice and receipt a home as soon as it arrives, and the return becomes a review exercise instead of a rescue mission.

Set a monthly cut-off for checking uncategorised transactions, missing receipts and mileage. If somebody else prepares your return, give them access early enough to query unusual items while the context is still fresh.

Baxter captures documents from email and WhatsApp, organises them by date and flags anything it cannot read. That keeps the evidence beside the numbers and makes the final accountant hand-off much cleaner.

QUICK CHECKLIST
  • Capture receipts throughout the year
  • Review exceptions once a month
  • Share records before the January rush
General information only, not tax or accounting advice. Ask a qualified adviser about your circumstances.