Don’t miss the self-assessment deadline: last-minute checklist
Essential reading before the 31 January deadline
With the 31 January Self-Assessment deadline fast approaching, many business owners and sole traders, as well as anyone else with sources of income necessitating submission of a tax return, are entering the familiar rush to get everything completed on time. Whether you’ve been gradually preparing throughout the year or you’re only just getting started, there is still time to file accurately, avoid penalties and reduce unnecessary stress. A clear plan over the coming days can make all the difference.
The first step is to bring all your income information together. HMRC requires you to declare all taxable income for the year, so it’s important to ensure your paperwork is complete. Employment income, dividends, bank interest, rental income and self-employment earnings must all be included, as well as any other sources that contribute to your total taxable position. You can check what HMRC expects on the Self-Assessment overview page. Missing information can delay the process or lead to errors, so taking the time to gather everything properly is essential.
Next, if applicable, review the expenses you’ve incurred through your business. Claiming legitimate business expenses reduces your tax bill, and many business owners underestimate what they may be entitled to deduct. Office costs, professional fees, travel for business purposes and staff-related costs all contribute to your overall expense position. If you’re unsure what you can claim, our team can help you maximise your position through our personal tax services and Self-Assessment tax return support. It’s worth revisiting your records, receipts and bank statements to ensure you haven’t overlooked anything, especially smaller costs that can add up.
It’s also important to check your payments on account, if they apply to you. Many people forget what they’ve already paid or fail to consider whether their income has increased or decreased over the year. HMRC provides helpful guidance on payments on account, which can assist you in preparing for the payment due in January and avoiding unwelcome surprises to your cash flow.
Before submitting your return, take a moment to review your personal allowances and reliefs. Pension contributions, Gift Aid donations and certain types of investment relief may reduce your overall liability, while any capital allowances or trading losses should be included to ensure you receive the full benefit you’re entitled to. Our tax planning for business owners page includes advice on using reliefs effectively, along with tips that can help you plan ahead for the new tax year.
One common misconception is that you must pay your tax bill at the same time you file your return. However, you can submit your return even if you’re not ready to pay immediately. Filing early gives you time to arrange a Time to Pay instalment plan with HMRC if needed, and it helps you understand your cash flow with more clarity. You can learn more about this option through HMRC’s Time to Pay guidance. If you expect to need an instalment arrangement, dealing with it before the deadline is always easier.
If you are filing yourself, make sure you can log into the HMRC portal without issues. Government Gateway login details, access codes and two-factor authentication are often stumbling blocks for last-minute filers. If you’re working with an accountant, now is the ideal time to provide any remaining information so your return can be finalised without delay. If you need further assistance, our team at Moore offers comprehensive accounting services for small businesses, designed to streamline your financial processes and support you throughout the year.
Missing the deadline can be costly. HMRC applies an automatic £100 penalty the moment the deadline passes, even if you have no tax to pay. Additional penalties and interest begin to accumulate after three months, meaning a late return can quickly become expensive. Details on fines are listed on HMRC’s deadlines and penalties page. Filing on time is the simplest way to avoid unnecessary charges.
The Self-Assessment deadline doesn’t have to be stressful. With a final review and a clear approach, you can submit confidently and on time. And if you need help with the final stages, whether you’re unsure about expenses, concerned about accuracy or simply want expert reassurance, our specialist team is ready to assist. You can get in touch with us today for tailored support.