The Interpublic Group of Companies, Inc. (IPG) 10-K 2013 FY Annual report

EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (333-28029, 333-42675, 333-59254, 333-89896, 333-115923, 333-115924, 333-159544, 333-134498, 333-134497, 333-159546) and Form S-3 (333-179667) of The Interpublic Group of Companies, Inc. of our report dated February 24, 2014 relating to the consolidated financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

New York, New York

February 24, 2014