Exhibit 23.2

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Registration Statement on Form S-1 of our report dated March 16, 2018 (May 10, 2018 as to the effect of the reverse stock split described in Notes 2 and 13), relating to the consolidated financial statements of Avalara, Inc. and subsidiaries appearing in the Prospectus, which is part of this Registration Statement.

We also consent to the reference to us under the heading “Experts” in such Prospectus.

/s/ Deloitte & Touche LLP

Seattle, Washington

June 4, 2018