This type of tax code is usually applicable when the employee is paying tax that they owe from a previous year through their wages or pension, or receiving benefits that the employee needs to pay tax on - these can be state benefits or company benefits.
Did you know?
Employers and pension providers cannot take more than half the employees pre-tax wages or pension when using a K tax code.
Emergency Tax Codes
If an employee's tax code ends in ‘W1’ or ‘M1’ or ‘X’, this means that they are on an emergency tax code.
For example:
- 1257L WI
- 1257L MI
- 1257L X
An employee may be put on an emergency tax code if HMRC does not receive an employees income details in time after a change in circumstances such as:
- A new job.
- Working for an employer after being self-employed.
- Receiving company benefits or the State Pension.
Emergency tax codes are temporary. HMRC will usually update the tax code when the employee or their employer provides them with the correct details.
If the change in circumstances means the employee has not paid the right amount of tax, they will remain on the emergency tax code until the correct tax has been paid for the year.
Why would an employee's Tax Code change?
HMRC may change/update an employees tax code due to the following circumstances:
- The employee starts a new job.
- The employee receives taxable state benefits.
- The employee begins to receive income from an additional job or pension.
- The employees weekly State Pension amount changes.
- The employer informs HMRC that the employee has started or stopped getting benefits from their job.
- The employee claims Marriage Allowance.
- The employee claims expenses that they get a tax relief on.