Exhibit 23.1 

Deloitte LLP

Bay Adelaide East

8 Adelaide Street West

Suite 200

Toronto ON M5H 0A9

Canada

Tel: 416-601-6150

Fax: 416-601-6610

www.deloitte.ca

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in this Registration Statement on Form F-1 of our report dated February 22, 2021, relating to the financial statements of TELUS International (Cda) Inc. appearing in the Annual Report on Form 20-F for the year ended December 31, 2020. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ Deloitte LLP

Chartered Professional Accountants

Licensed Public Accountants

Toronto, Canada

September 21, 2021