Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statements No. 333-188929, 333-213602 and 333-218388 on Forms S-8 and Registration Statement No. 333-191522 on Form S-3 of our report dated March 9, 2018 relating to the consolidated financial statements of PennyMac Financial Services, Inc., and subsidiaries (the “Company”) and the effectiveness of the Company’s internal control over financial reporting appearing in this Annual Report on Form 10-K of the Company for the year ended December 31, 2017.

/s/ Deloitte & Touche LLP

Los Angeles, California

March 9, 2018