What Businesses and Self- Employed Individuals Need To Know
July is one of the busiest times in the UK tax calendar and is a critical month for self-employed individuals, employers, VAT registered businesses, and those operating under the Construction Industry Scheme (CIS). Missing a deadline can result in penalties, interest, and unnecessary stress.
This blog breaks down the key July 2025 tax deadlines UK businesses need to know, helping you stay compliant and avoid surprises. We will also explain what each obligation means and how to prepare effectively.
Why July Matters in the UK Tax Calendar
Whether you are a sole trader, limited company director, or run payroll for employees, July 2025 comes with several important tax deadlines. These include responsibilities related to Self-Assessment, P11D forms, VAT payments, and CIS returns.
Staying on top of these deadlines isn’t just good practice, it is essential for cash flow, record-keeping, and avoiding HMRC penalties.
Key July 2025 Tax Deadlines UK
Here is a breakdown of the major July 2025 tax deadlines UK businesses and individuals need to meet:
6 July 2025 – P11D and P11D(b) Submission Deadline
If your business provides employees or directors with benefits-in-kind (such as company cars, health insurance, or interest-free loans), you must file P11D forms with HMRC. You are also required to submit a P11D(b) form to declare any Class 1A National Insurance due on these benefits.
By 6 July 2025, you must:
Submit P11D forms for each employee or director receiving benefits
Submit the P11D(b) form for Class 1A NICs
Provide each employee with a copy of their P11D
Missing this deadline may result in penalties, including fines of £100 per late form (per 50 employees) and potentially additional daily fines.
19 July 2025 – Class 1A National Insurance Payment Due
Once your P11D(b) is submitted, the related Class 1A NIC must be paid by 19 July 2025 if paying by post. For electronic payments, the deadline is 22 July 2025.
Class 1A NIC is payable by the employer based on the total value of taxable benefits provided. Late payments can lead to interest charges and penalties, so ensure this deadline is met.
31 July 2025 – Second Payment on Account for Self-Assessment
The second payment on account for the 2024/25 tax year is due by 31 July 2025. This deadline applies to those who file a Self Assessment tax return, such as:
Sole traders
Landlords
Company directors with untaxed income
Payments on account are advance tax payments based on the previous year’s bill. Usually, each payment is 50% of your prior year’s tax liability. For example, if your 2023/24 bill was £10,000, you would pay £5,000 in January 2025 and £5,000 in July 2025.
If your income for 2024/25 is lower than in the previous year, you can apply to HMRC to reduce your payments on account. However, be mindful that underestimating may result in interest charges on any shortfall.
VAT Returns and Payments – Deadlines in July
If your business operates under the standard VAT scheme and your VAT quarter ended on 31 May 2025, your VAT return and payment are due by 7 July 2025. This applies to electronic filers.
It is important to:
Submit your VAT return by the due date
Make sure your payment is received by HMRC on time
VAT penalties and interest can apply to late returns or payments. Use MTD-compliant software and automate reminders to avoid missing this deadline.
19 July 2025 – Monthly CIS Return Submission
Contractors registered under the Construction Industry Scheme (CIS) must submit their monthly return for subcontractor payments made in June 2025 by 19 July 2025.
You must:
Submit your monthly CIS return by the 19th
Pay any CIS deductions to HMRC by 22 July if paying electronically
Provide subcontractors with deduction statements
Late filing penalties start at £100 and increase with continued delays. This is a key July 2025 tax deadline UK contractors must plan for.
Additional Considerations for July 2025
Apart from the statutory deadlines, July is also a strategic time to conduct a mid-year financial review. Evaluating your business’s performance halfway through the year allows you to adjust your budget, forecast tax liabilities, and prepare for upcoming regulatory changes, including Making Tax Digital (MTD) for Income Tax. Read more about Making Tax Digital here
If you’re a director drawing a salary from your limited company, July is a good opportunity to reassess your remuneration strategy. Ensuring your salary is tax-efficient and compliant with NI thresholds can save you and your business money. National Insurance thresholds have changed this year so make sure you are up to date with the latest information here.
How to Prepare for July 2025 Tax Deadlines
To stay ahead of July’s requirements, follow these best practices:
Use accounting software like Xero, QuickBooks, or Rhino to track deadlines.
Set calendar reminders at the start of each month for key obligations.
Work with a qualified accountant who understands your business.
Keep digital records in line with Making Tax Digital (MTD) rules.
Review past payments on account and request reductions if needed.
Consequences of Missing July 2025 Tax Deadlines
Missing one or more July 2025 tax deadlines can result in:
Interest on unpaid tax
Fixed penalties for late filing
Surcharges for repeat offences
Disruptions to cash flow and financial planning
If you think you may miss a deadline, contact your accountant or HMRC immediately. They may offer flexibility in genuine cases, especially where a reasonable excuse is provided.
Stay Ahead with Professional Support
July can be a hectic month for tax compliance, especially if your business is juggling payroll, Self Assessment, VAT, and CIS obligations. The key is preparation and communication.
At Smart Accountants, we specialise in helping small businesses and self-employed individuals navigate the UK tax system. From VAT filing to Self-Assessment planning, our expert team ensures you never miss a deadline.
Final Thoughts on July 2025 Tax Deadlines
The July 2025 tax deadlines businesses must meet are some of the most important dates on the financial calendar. From P11Ds to Self-Assessment and VAT returns, keeping track of everything can be overwhelming without proper support.
Start preparing early, stay organised, and use this guide to stay compliant. If you are unsure about your obligations or need help managing your July 2025 tax deadlines, speak to a professional today.
Need Help With July’s Tax Deadlines?
Contact Smart Accountants to schedule a free consultation and get ahead of your July 2025 tax deadlines.
