5.6 Million Taxpayers Face Self Assessment Countdown

With less than four weeks remaining, over 5.6 million UK taxpayers have yet to file their self assessment tax returns. Missing the deadline triggers immediate penalties—don’t delay.
January 5, 2026
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Sophie Turner
January 5, 2026
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Time Is Ticking: Contractors, Don’t Get Caught Out

The clock is merciless. With less than a month to go before the self assessment deadline on 31 January, a staggering 5.65 million UK taxpayers have yet to file their 2024-25 tax returns. The message is crystal clear: If you’re a contractor, it’s time to act or pay the price.

Government figures show that over 6.36 million have already submitted their returns. But the rest? They’re gambling with their finances and their future.

The Brutal Cost of Delay

Let’s not sugar-coat it. Missing the self assessment deadline isn’t just a minor slip-up—it’s a direct hit to your wallet and your reputation. Here’s what you face:

Delay Period Penalty
1 day late £100 immediate fine
3 months late £10/day up to £900 extra
6 months late 5% of tax due (min. £300)
12 months late Additional 5% or £300 minimum

Don’t hand your hard-earned money to HMRC because of procrastination.

New Year, Same Excuses—But No Mercy

Every year, thousands scramble to file just before the bell. This year was no different:

  • 54,053 taxpayers submitted returns over New Year’s Eve and New Year’s Day.

  • 342 people filed in the final hour before midnight.

  • The most popular filing slot? 11am to 11:59am on New Year’s Eve, with 3,927 returns.

It’s clear: some thrive on last-minute pressure. But for UK contractors, that’s a reckless risk.

Why Contractors Are Vulnerable

Contractors, freelancers, and the self-employed often juggle multiple clients, variable income, and complex expenses. Mistakes or missing paperwork lead to costly delays. And let’s face it, HMRC is relentless when it comes to penalties, regardless of your workload or good intentions.

Key warning:

“Missing the deadline is an expensive business.”

Five Steps to File Without Fear

  1. Gather Your Records: Invoices, bank statements, expense receipts, pension contributions, and any relevant income.

  2. Log In Early: Don’t wait for the site to crash. File online at HMRC’s portal.

  3. Double-Check Everything: Avoid errors that trigger investigations or corrections later.

  4. Pay Any Tax Due: Filing late is bad; paying late is worse. Interest piles up quickly.

  5. Keep Confirmation: Save your submission receipt. You may need it to contest penalties or prove compliance.

The Bottom Line: Take Action Now

Procrastination is not a strategy. HMRC won’t offer sympathy—and neither will your bank balance. The sooner you file, the sooner you can focus on what really matters: growing your business, not dodging penalties.

“With under four weeks until the deadline for self assessment, 5.65 million taxpayers still have to complete their 2024-25 tax returns.”

Related Reading for Contractors

What’s Next?

  • Prioritise your tax return today.

  • If you’re unsure or overwhelmed, seek professional advice—don’t stumble at the final hurdle.

  • Share this with any contractors or colleagues who might be at risk.

The January 31st deadline isn’t moving. Are you ready, or are you willing to pay the penalty?

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