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Self Assessment Deadline Coming Soon: What to Do If You Can’t Pay Your Tax Bill!

Published Date: January 19, 2026

( Last Updated: February 19, 2026 )

As the 31 January Self Assessment deadline fast approaches, many are starting to feel the pressure, not because they don’t know how to complete the Self Assessment Tax Return or lack knowledge on requirements, but because they lack the funds to pay their tax liabilities.

This situation is more common than you might think. The key is not to panic or ignore the problem. Taking early, practical steps can help prevent it from escalating and becoming more stressful.

Missing the deadline or avoiding the issue can lead to penalties and extra costs. However, there are sensible actions taxpayers can take if paying the full amount by the end of January feels difficult.

Do You Know How Much You Owe?

The first step in addressing the non-availability of funds for taxes is to confirm the exact amount you need to pay. Many people plan around rough estimates, which can add unnecessary stress or lead to poor decisions.

Self Assessment bills can include more than just the tax for the year that just ended. In some cases, payments on account may also be included, making the figure higher than expected. Understanding exactly what the bill covers helps you plan more effectively and avoid surprises.

Review Your Tax Return Carefully

Before paying, it is worth reviewing your tax return carefully. Rushed submissions can sometimes include errors that inflate the final bill, particularly around income figures or allowable expenses.

Taking a little extra time to check the numbers can help ensure you are not paying more than you should. Once a return has been submitted and paid, correcting mistakes can be more complicated, so accuracy at this stage is important.

What If You Can’t Pay the Entire Tax Amount Due?

If paying the entire bill is not possible, making a partial payment can still be helpful. Paying something towards the balance shows engagement and can reduce the overall pressure of the situation.

Rather than seeing the bill as an all-or-nothing situation, breaking it down into manageable steps can make it feel more controllable. Even a partial payment can ease the mental burden and help prevent the issue from spiralling.

Exploring Time to Pay arrangements may prove helpful in this scenario.

Get Expert Advice Well Before the Self Assessment Deadline

Seeking advice early can make a significant difference. Speaking to expert accountants like UK Property Accountants before the self assessment deadline opens up more options and gives you time to understand what support may be available.

Waiting until the last minute limits your choices and increases stress. Early conversations tend to provide more breathing room and clearer guidance on the best next steps.

Speak to HMRC & Explain Your Situation

Engaging with HMRC early is generally better than staying silent. If you know you cannot pay what is due, it is advisable to make contact rather than wait until the deadline has passed.

HMRC has previously encouraged taxpayers who are struggling to come forward, and in many cases, they may be able to offer a time to pay arrangement based on what you can realistically afford. This approach can help spread the cost and avoid further complications.

Conclusion

If you cannot pay your Self Assessment bill in full, it is worth remembering that you are not alone. There may be many others like you who are facing cash-flow challenges at this time of year.

Treating the situation as a financial planning issue rather than a personal failing can help keep things in perspective. Getting clear on the numbers, making a plan and taking action early are often the most effective ways to stay in control and reduce the risk of penalties or added stress.

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