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Self-Assessment Make It Work For You

  • Jun 24
  • 3 min read

For many people, the words Self-Assessment tax return immediately trigger stress. Forms, deadlines, calculations, and uncertainty over what needs to be declared often leave taxpayers feeling overwhelmed.

A man with hands to his face overlayed by tax words and rules.
The stress and worry of tax rules!

Understanding Self-Assessment should'nt be complicated, understanding your obligations early and preparing properly, gives you the best chance of tax efficiency.


Self-Assessment Make It Work For You

Self-Assessment is HMRC’s system for collecting Income Tax from individuals whose tax cannot be automatically deducted through PAYE. Instead of tax being taken directly from wages or pensions, you are responsible for reporting your income and calculating what you owe.

You may need to complete a tax return if you:


  • Are self-employed or a sole trader

  • Earn rental income from property

  • Receive dividends above your allowance

  • Have foreign income

  • Are a company director (in certain situations)

  • Receive capital gains from selling assets

  • Earn untaxed income over HMRC thresholds


Even if you’ve submitted tax returns in previous years, it’s important to review your circumstances annually, as changes in your income may affect your filing requirements.

If this is your first Self-Assessment tax return, you may also need to make Payments on Account. These are advance payments towards your next year's tax bill and apply where your tax liability exceeds £1,000.


This means you will pay the tax due for the year just ended in full, plus a first Payment on Account equal to 50% of that amount. A second 50% payment is then due on 31 July, against your next years tax bill!


Key Deadlines

Missing deadlines can lead to unnecessary penalties, so knowing the important dates is essential.


  • 5 October – Deadline to register for Self-Assessment if you’re filing for the first time

  • 31 October – Deadline for paper tax returns

  • 31 January – Deadline for online tax returns and payment of any tax owed


If you miss the 31 January deadline, HMRC may issue an automatic late filing penalty, even if no tax is due and the clock starts ticking on further penalties/interest.

 

Common Mistakes Cost You Money

Many taxpayers end up paying more tax than necessary or face penalties, because of avoidable mistakes.

Some of the most common issues include:


  • Forgetting to declare all sources of income

  • Missing allowable expenses

  • Filing too close to the deadline

  • Failing to keep accurate records

  • Not setting money aside for tax payments


For self-employed individuals, keeping organised records throughout the year can make filing significantly easier and reduce the chance of errors.


Filing Early Helps

Many people leave their tax return until January, creating unnecessary pressure during an already busy time of year. Filing early offers several advantages:


  • More time to identify tax-saving opportunities

  • Reduced risk of errors

  • Greater clarity over your tax bill

  • More time to budget for payment


Even if your payment isn’t due until 31 January, submitting your return earlier allows you to plan ahead.


Could You Be Paying More Tax Than Necessary?

One of the biggest concerns we see is individuals overpaying tax because they aren’t claiming all available allowances, reliefs, or deductions.


This can apply to:


  • Landlords

  • Self-employed individuals

  • Higher earners

  • Those with investment income

  • People with multiple income streams


Professional tax advice can often uncover opportunities that are easily missed when filing alone.


Whether your affairs are straightforward or involve multiple income sources, professional tax advice/preparation can help identify tax saving opportunities at the same time make the process simpler and far less stressful.


Don’t leave your tax return until the last minute. Early action can save time, stress, and potentially money.

 
 

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