Payment on Account for UK Self-Employed Explained

If you're self-employed in the UK, understanding 'payment on account' is a necessary part of managing your tax obligations. In simple terms, payment on account is a way for HMRC to collect tax in advance from those who are self-employed. This ensures that your tax payments are spread throughout the year, rather than being a large sum due at the end of the tax year.

For 2026, it's important to note that these advance payments are typically based on your previous year's tax bill. This helps keep your tax affairs in order and can prevent any surprise large payments at the end of the year. Let's dig into how this works and what you need to keep in mind.

How it works in 2026

In 2026, if you are self-employed and your tax bill is over £1,000, you'll most likely be required to make payments on account. These payments are made in two instalments, each covering 50% of your previous year's tax bill. The due dates for these payments are 31 January and 31 July each year.

For example, if your tax bill for the 2025/26 tax year was £2,000, you would pay £1,000 on 31 January 2026 and another £1,000 by 31 July 2026. This ensures that HMRC receives tax payments in a more regular fashion, reducing the risk of late payments and penalties.

It's also important to note that these payments on account include Class 4 National Insurance Contributions if your self-employed profits are above the threshold, which is £12,570 in 2026.

Understanding Due Dates and Amounts

These payments are calculated based on your previous year's tax liability, meaning they are not directly related to your current year's income. However, if your income has significantly changed, you can request to adjust these payments.

What HMRC Checks / Common Mistakes

• Failing to pay by the due dates, leading to penalties and interest.
• Incorrectly estimating your current year's income, which can lead to overpayment or underpayment.
• Not accounting for National Insurance Contributions, which are part of the payment on account.
• Overlooking the need to request a reduction if your current year's income has decreased.
• Misunderstanding the impact of previous year's tax adjustments or reliefs on current payments.

Step by Step Guide

Managing payments on account can seem daunting, but breaking it down into steps can simplify the process. Here’s how you can organise your finances to stay compliant:

1. Calculate your previous year's tax bill to determine if payments on account are required. Use HMRC's online tools or consult your tax return for the exact amount.
2. Check the due dates and prepare to make two payments, 31 January and 31 July. Set reminders on your phone or calendar to stay on top of these deadlines.
3. Consider your current year's income. If it has significantly changed, contact HMRC to adjust the payment. This can prevent overpaying or underpaying, which can have financial consequences.
4. Ensure you have included Class 4 National Insurance Contributions if applicable. This is often overlooked but is crucial for accurate tax calculations.
5. Make your payments on time to avoid any penalties. Late payments can accrue interest, adding unnecessary costs.
6. Review any changes in your business expenses or income regularly to adjust your payments on account accordingly.
7. Keep meticulous records of all your financial transactions, as they will be invaluable for both tax calculations and in case of an HMRC inquiry.

Worked Example

Let's say John, a self-employed plumber from Bristol, had a tax bill of £3,000 for the year 2025/26. His payments on account for 2026 would be £1,500 due on 31 January 2026 and another £1,500 due on 31 July 2026.

If John's income in 2026 had significantly reduced, he could contact HMRC and request to lower the payments on account. However, if his income increased, he might need to pay a balancing payment by 31 January 2027 to cover any shortfall.

Consider another scenario where John's business expanded, and his income increased by 20%. He would need to calculate his additional income tax and Class 4 National Insurance Contributions to ensure his balancing payment is accurate. Failing to do so could result in a larger lump sum payment at the end of the tax year.

Adjusting Payments on Account

When your business experiences a shift in income, whether an increase or decrease, you have the option to adjust your payments on account. This flexibility is crucial for managing cash flow effectively.

To reduce your payments, you need to provide HMRC with a reasonable estimate of your current year's income. Be cautious with your estimates; underestimating can lead to penalties if you end up owing more tax than anticipated. Overestimating, on the other hand, could mean tying up funds unnecessarily, which could be invested back into your business.

It's worth noting that HMRC allows you to amend your estimated figures at any point during the tax year. This means if your circumstances change mid-year, you can still adjust your payments to better align with your financial situation.

Utilising Professional Help

While managing your finances independently can save money, hiring a professional can often save you headaches and potentially money in the long run. A qualified accountant can guide you through the complexities of payments on account and other tax obligations, ensuring compliance and optimising your tax efficiency.

For instance, if your business is growing rapidly, an accountant can help you manage your tax liabilities and advise on tax reliefs or allowances you might qualify for. The Institute of Chartered Accountants in England and Wales (ICAEW) is a reputable body that can help you find a qualified accountant suited to your business needs.

An accountant can also assist in maintaining accurate financial records, which are vital not only for tax purposes but for assessing the health of your business. They can offer insights on cost management and help you identify areas where you might reduce expenses or improve profitability.

When to Get Help

If you find yourself struggling with the concept of payment on account or if your financial situation is complex, it may be wise to seek professional advice. An accountant can provide clarity, ensuring you meet all deadlines and avoid unnecessary penalties. They can also help with making accurate estimates and adjustments where necessary. The Institute of Chartered Accountants in England and Wales (ICAEW) is a good starting point for finding a reputable accountant.

If your business has undergone significant changes, such as expansion or diversification, or if you have incurred unexpected expenses that impact your cash flow, consulting a financial advisor could be beneficial. They can help you devise strategies to manage these changes effectively.

Bottom Line

Understanding payment on account is essential for staying on top of your tax obligations as a self-employed individual in the UK. Make sure you keep track of due dates and payment amounts to avoid penalties. For more assistance, use our Payment Calculator to help manage your finances effectively.

For additional resources, check out our blogs on Self-Employed Tax Tips and Managing Cash Flow.

FAQs

• What happens if I can't pay on time? If you miss a payment deadline, HMRC will charge interest on the overdue amount. It's crucial to contact them as soon as possible to discuss your situation and arrange a payment plan if necessary.
• Can I reduce my payment on account? Yes, if you believe your income for the current year will be lower than the previous year, you can apply to reduce your payments. However, ensure your estimate is accurate to avoid underpayment penalties.
• What if my income increases? If your income has increased, your payments on account may not cover your liability. You will need to make a balancing payment by 31 January following the end of the tax year.
• Are there penalties for overpayment? No, HMRC does not penalise you for overpayment. Any overpaid amount will be refunded or credited to your next year's tax bill.
• Do I include National Insurance Contributions in payment on account? Yes, Class 4 National Insurance Contributions are included if your profits exceed the threshold, so ensure to calculate these into your payments.
• How do I apply to adjust my payments on account? You can apply online through your HMRC account. Ensure you have your estimated figures ready and any relevant documentation to support your application.