Navigating P45s can be a tricky part of UK payroll. This comprehensive guide will provide you with everything you need to know about P45s in 2026, covering employer responsibilities, automation with payroll software, and common pitfalls to avoid. We’ll focus on UK-specific regulations and available software solutions.
As an Amazon Associate, we earn from qualifying purchases. This means we may receive a small commission at no extra cost to you when you buy through links on this page.
Table of Contents
What is a P45?
A P45 is an official document issued by an employer to an employee when they leave a job. It provides a summary of their pay and tax deducted during their employment. Crucially, it’s not just for departing employees; it’s a vital piece of information for HMRC (Her Majesty’s Revenue and Customs) to ensure tax is accurately reported.
Why is it essential?
- For Employees: The P45 allows employees to demonstrate to a new employer (or HMRC) that tax has already been paid on their income. It ensures they aren’t taxed twice on the same earnings.
- For Employers: Issuing a P45 is a legal requirement demonstrating compliance with HMRC regulations.
- For HMRC: P45 information contributes to the overall picture of UK income tax collection.
The P45 contains details such as the employee’s National Insurance number, total pay earned, tax deducted, and details of any student loan repayments. It’s split into three parts (detailed later in this guide).
P45 Responsibilities for Employers (2026 Update)
Employer obligations regarding P45s remain largely consistent, but it’s vital to stay updated with any HMRC changes anticipated for 2026. HMRC is expected to further refine its digital reporting requirements, potentially streamlining the P45 submission process through enhanced Real Time Information (RTI) systems.
Key Responsibilities:
- Timing: A P45 must be issued to the employee on or before their last day of employment. Delays can lead to penalties.
- Record Keeping: Employers are legally required to keep copies of P45s for at least three years after the end of the tax year in which the employee left. Digital copies are acceptable, provided they are readily accessible.
- Accuracy: Ensuring the P45 contains accurate information is paramount. Errors can cause issues for both the employee and HMRC.
- RTI Reporting: Information from the P45 must be reported to HMRC through the RTI system. The final submission should be made by the date of the employee’s leaving.
Potential Penalties for Non-Compliance (2026): HMRC penalties for late or inaccurate P45 submissions are expected to remain in line with current practices. These can range from fixed penalties for minor infractions to more substantial fines for persistent non-compliance. Expect increased scrutiny of digital submissions to ensure data integrity.
How Payroll Software Automates P45 Generation
Modern payroll software significantly simplifies the P45 process. Gone are the days of manual calculations and paper forms! Here’s how:
- Automatic Calculations: Software automatically calculates pay, tax, and National Insurance contributions, ensuring accurate P45 figures.
- Digital P45 Creation: P45s are generated electronically, ready for immediate distribution to the employee.
- RTI Integration: Seamless integration with HMRC’s RTI system allows for automatic submission of P45 information.
- Leaver Workflows: Dedicated leaver workflows guide employers through the necessary steps, reducing the risk of errors.
Benefits of Automation:
- Reduced Errors: Automation minimizes human error, ensuring accurate P45s.
- Time Savings: Automated processes free up valuable time for payroll staff.
- Improved Compliance: Software ensures compliance with HMRC regulations.
- Enhanced Efficiency: Streamlined workflows improve overall payroll efficiency.
Handling Different Leaver Scenarios with P45s
The P45 process can differ slightly depending on the reason for an employee’s departure:
- Resignation: Standard P45 process, covering pay to the last working day.
- Dismissal: Similar to resignation, but ensure adherence to employment law regarding final pay.
- Redundancy: P45 issued as normal, but consider statutory redundancy pay and its tax implications. This needs to be correctly reflected in the P45.
- Temporary Leave: No P45 is issued for temporary leave (e.g., sick leave, maternity leave) as employment continues.
Final Pay Calculations: Ensure final pay includes all accrued holiday pay, bonuses, and any other outstanding entitlements. Statutory payments (e.g., redundancy pay, statutory sick pay) must be correctly calculated and reported on the P45.
Understanding the Different Parts of a P45
The P45 form is divided into three parts:
- Part 1 (For HMRC): This section is submitted directly to HMRC, either electronically through RTI or by post. It contains aggregated payroll data for the leaving employee.
- Part 2 (For the Employee): This is the part given to the employee. It details their total earnings and tax paid during their employment. The employee provides this to their new employer (or HMRC if self-employed).
- Part 3 (For the Employee’s Records): This section is for the employee’s own records and provides a summary of their tax position.
Each section contains specific information, including:
- Employee’s Name and Address
- National Insurance Number
- Tax Code
- Gross Pay
- Tax Deducted
- National Insurance Contributions
- Student Loan Repayments (if applicable)
P45 and Auto-Enrolment Pensions
When an employee leaves, their auto-enrolment pension contributions need to be addressed. The P45 should not include pension information directly, but employers need to:
- Inform the Pension Provider: Notify the pension provider of the employee’s departure.
- Communicate Pension Options to the Employee: Explain the employee’s options regarding their pension (e.g., leaving it invested, transferring it to a new provider).
- Provide Relevant Pension Statements: Supply the employee with their latest pension statements.
Ensure the departing employee understands their pension rights and options before they leave.
Common P45 Errors and How to Avoid Them
Common mistakes include:
- Incorrect National Insurance Number: Double-check the employee’s NI number.
- Inaccurate Pay Figures: Ensure all earnings, including bonuses and holiday pay, are included.
- Incorrect Tax Code: Use the correct tax code for the relevant tax year.
- Late Submission: Issue the P45 on or before the employee’s last day of employment.
- Missing Information: Ensure all required fields are completed.
How to avoid them:
- Utilise payroll software with built-in validation checks.
- Train payroll staff thoroughly.
- Regularly review P45s before issuing them.
P45s and HMRC Reporting in 2026
As mentioned, P45 information is reported to HMRC through the Real Time Information (RTI) system. In 2026, expect HMRC to continue to refine its digital reporting requirements. This may involve:
- Enhanced data validation checks.
- More frequent RTI submissions for leavers.
- Increased use of Application Programming Interfaces (APIs) for data exchange.
Staying up-to-date with HMRC guidance is crucial to ensure compliance.
Choosing Payroll Software with Robust P45 Functionality
When selecting payroll software, consider these features:
- Automated P45 Generation: Essential for efficiency and accuracy.
- RTI Integration: Seamless reporting to HMRC.
- Leaver Workflows: Guided processes for managing employee departures.
- Error Checking: Built-in validation to prevent mistakes.
- Reporting Capabilities: Comprehensive reports for auditing and compliance.
Here’s a comparison of popular UK payroll software options:
| Software | Price (GBP – 2026 Estimate) | P45 Functionality | RTI Integration | Overall Rating (out of 5) |
|---|---|---|---|---|
| BrightPay | £169 | Excellent – Fully automated generation and submission. | Yes | 4.5 |
| Sage 50cloud Payroll | £240 | Good – Comprehensive, integrates well with other Sage products. | Yes | 4.0 |
| QuickBooks Payroll | £195 | Good – User-friendly, suitable for small businesses. | Yes | 3.8 |
| Xero Payroll | £270 | Very Good – Cloud-based, strong integration with Xero accounting software. | Yes | 4.2 |
| Paycircle | £99 | Good – Affordable, good for basic payroll needs. | Yes | 3.5 |
Questions to ask potential vendors:
- Does the software automatically calculate and generate P45s?
- Is the software fully compliant with the latest HMRC regulations (including anticipated 2026 updates)?
- What level of support is available?
- What are the data security measures in place?
FAQ
What happens if I issue an incorrect P45?
If you issue an incorrect P45, you should contact HMRC immediately to rectify the error. You may need to issue a corrected P45 to both the employee and HMRC. Penalties may apply depending on the severity of the error.
Can an employee request a P45 if they have left the company some time ago?
Yes, an employee can request a P45 from their former employer at any time. Employers are legally obligated to provide it, even if a significant amount of time has passed.
What if I don’t have the employee’s correct National Insurance number?
You should attempt to obtain the correct NI number from the employee. If you are unable to do so, contact HMRC for assistance. Incorrect NI numbers can cause issues with tax reporting.
Is it acceptable to send a P45 via email?
Yes, sending a P45 via a secure email is generally acceptable, provided the employee consents. Ensure the email is password-protected or sent using a secure platform.
What are the implications of not submitting P45 information correctly to HMRC?
Failure to submit P45 information correctly can result in penalties from HMRC, ranging from fixed fines to more substantial charges for persistent non-compliance. It can also lead to inaccuracies in employee tax records.