Off-payroll working (IR35)

Phone

Before you call

This helpline may ask you some security questions. Make sure your personal details and address are up to date in your personal tax account or you could fail telephone security. If you do not already have a personal tax account, you can set one up.

Call HMRC for:

  • help with enquiries about the off-payroll working rules
  • a full run-through of the Check Employment Status for Tax (CEST) tool

Telephone:
0300 123 2326

Fax:
03000 533 124

Opening times:

Monday to Friday: 8.30am to 4.30pm

Closed on Saturdays, Sundays and bank holidays.

You can also find out information in:

Webchat

You’ll need to have your National Insurance number to use webchat.

Speak to an adviser online.

Use this service for help with straightforward enquires about the:

  • off-payroll working rules
  • questions in the Check Employment Status for Tax (CEST) tool

Find out about call charges

Post

Write to HMRC for help with enquiries about the off-payroll working rules.

HM Revenue and Customs
IR35 Customer Service Unit
S0733
Newcastle Upon Tyne
NE98 1ZZ
United Kingdom