Key UK Tax Deadlines You Can’t Afford to Miss: July 2026
As the summer gets underway, it’s easy to let administrative tasks slip down the priority list. But when it comes to tax obligations, July is a critical month for employers and self-employed individuals alike. Missing key deadlines can lead to penalties, unnecessary stress, and avoidable complications with HMRC.
Here’s a clear breakdown of the important dates you need to have firmly marked in your calendar for July 2026, and what they mean for you.
📅 6 July 2026 – P11D and P11D(b) Deadline
The 6th of July is a significant date for employers across the UK. By this deadline, you must:
Submit P11D forms for each employee who has received benefits in kind (such as company cars, private medical insurance, or interest-free loans).
Submit the P11D(b) form, which summarises the total Class 1A National Insurance contributions due on those benefits.
Provide employees with their individual P11D forms, ensuring they are aware of the benefits reported and can account for them in their personal tax affairs.
Failing to meet this deadline can result in penalties from HMRC, so accuracy and timeliness are essential. It’s also good practice to communicate clearly with employees so they understand what the form includes and why they’ve received it.
💼 Why P11Ds Matter
P11D forms aren’t just paperwork, they directly impact how much tax employees may owe. Benefits in kind are treated as taxable income, and errors can lead to underpayments or overpayments of tax.
For employers, this is also about compliance. Ensuring all benefits are properly reported protects your business from fines and maintains trust with your workforce.
📅 31 July 2026 – Second Payment on Account
If you’re self-employed or receive income outside of PAYE, this is another crucial date.
By 31 July 2026, you must make your second Payment on Account for the 2025/26 tax year. This is essentially an advance payment towards your tax bill, based on your previous year’s liability.
What is a Payment on Account?
Payments on Account help spread the cost of your tax bill across the year. They are usually split into two instalments:
First payment: 31 January
Second payment: 31 July
Each payment is typically 50% of your previous year’s tax bill.
⚠️ What Happens If You Miss It?
Missing the 31 July deadline can lead to:
Interest being charged on late payments
Potential penalties if delays continue
Cash flow issues if the balance builds up
If your income has dropped and you believe your tax bill will be lower, you may be able to reduce your Payments on Account, but this must be done carefully to avoid underpayment penalties later.
🤝 How JSB Accountants Can Help
Staying compliant doesn’t have to be overwhelming. JSB Accountants can support both businesses and individuals with:
Preparing and submitting accurate P11D and P11D(b) forms
Ensuring employees receive correct documentation on time
Managing your Self Assessment and calculating Payments on Account
Providing proactive advice to help you plan and avoid unexpected tax bills
With expert guidance, you can focus on running your business or managing your finances with confidence, knowing your tax obligations are in safe hands.
✅ Final Thoughts
July might be a quieter month for many businesses, but tax obligations don’t take a holiday. Staying on top of these deadlines ensures:
Smooth compliance with HMRC
Better financial planning
Reduced risk of penalties
A little preparation now can save a lot of hassle later. Whether you’re an employer handling P11Ds or an individual managing your Self Assessment, make sure these dates don’t catch you off guard.
If you need support, reaching out to a trusted advisor like JSB Accountants could make all the difference.
As a family-run company, we pride ourselves on providing a bespoke service tailored to your particular needs.
Above all, our objective is to save you time, money and effort in managing your accounts, leaving you free to focus on building your business.
Remember, you’re not alone, we’re always here to help if you have an accounts problem or query
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