A P45 is an official UK tax document issued by an employer when an employee leaves their job. It provides details of the employee’s pay and income tax deductions for the current tax year up to the date of leaving.
The P45 ensures that an employee’s tax information is correctly transferred to a new employer or to HM Revenue & Customs (HMRC), helping to prevent overpayment or underpayment of tax.
A P45 contains key employment and tax details, including:
- Employee information: name and National Insurance (NI) number.
- Employer details: employer reference number.
- Leaving date: the employee’s final day of employment.
- Tax code: the tax code used up to the leaving date.
- Total pay to date: earnings in the current tax year.
- Tax paid to date: income tax deducted so far.
The document is divided into parts which are distributed to the employee, the new employer, and HMRC as required.
A P45 plays an important role in UK payroll and tax administration:
- Starting a new job: employees provide their P45 to their new employer to ensure correct tax deductions.
- Unemployment or benefits: HMRC may use the P45 to assess tax or benefit entitlements.
- Tax reconciliation: supports accurate year-end tax calculations.
- Payroll records: helps employers maintain compliant payroll documentation.
If an employee does not have a P45, alternative forms or starter declarations may be required.
- P45: issued when an employee leaves a job, covering pay and tax to date in the current tax year.
- P60: issued annually to employees still in employment at the end of the tax year, summarising total pay and tax for the year.
Both documents are essential for UK payroll and tax compliance but serve different purposes.
Mauve Group supports organisations employing staff in the UK through global payroll, Employer of Record (EOR), and payroll compliance services.
We help businesses:
- Issue P45s accurately and on time
- Maintain compliant payroll and tax records
- Manage employee leavers and payroll transitions
- Ensure correct reporting to HMRC
- Reduce payroll errors and compliance risks.
Our expertise ensures UK payroll processes remain accurate, compliant, and efficient.
- Payroll compliance: ensuring payroll processes meet legal and tax requirements.
- HM Revenue & Customs (HMRC): the UK authority responsible for tax administration.
- P60: annual tax summary provided to employees at the end of the tax year.
- Tax code: determines how much tax is deducted from an employee’s pay.
- Global payroll services: managing payroll operations across multiple countries.
- Employee leaver process: procedures followed when employment ends.