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Louise R. Summerhill



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Admitted to the Ontario Bar: 1990

Louise Summerhill has been with the firm since 1990 and a partner since 1994. She is a member of the Tax Group, the Co-Chair of the Tax Litigation Team, and Co-Chair of the Charity and Not-for-Profit Law Group.

PracticeLouise practises almost exclusively in the area of tax litigation. She provides support and advocacy at the audit stage, through the objection procedure and in court if necessary. She has appeared in the Tax Court of Canada, the Federal Court of Appeal, the Ontario Superior Court and the Ontario Court of Appeal. Louise also has extensive experience advising clients on transfer pricing, goods and services tax, provincial tax and federal income tax and charity law issues. Louise was formerly the Chair of the Student Committee for the firm and is currently Co-Chair of the firm's Women's Initiative.

Special Designations

Recognized in Who’s Who Legal Corporate Tax: Controversy as a leading Canadian tax lawyer

Named in Legal Media Group's Tax Advisors Expert Guide and Guide to the World's Leading Women in Business Law

Recognized for legal ability and high ethical standing by Martindale-Hubbell

Teaching EngagementsCo-creator and former adjunct professor of "The Course of a Transaction," Osgoode Hall Law School

MembershipsThe Advocates' Society
Canadian/Ontario Bar Association
Canadian Tax Foundation
Thomas More Lawyers' Guild of Toronto
Women Presidents' Organization (2004 - 2009)

Community InvolvementBenefAction Foundation, Board of Directors
Birthright International, Board of Directors
Philip Aziz Centre for Hospice Care, Board of Directors


LL.B., University of Windsor, 1988
B.A. (Hons., with Distinction), English, Glendon Campus, York University, 1984
B.A., English, St. Michael's College, University of Toronto, 1983

*Practising as a professional corporation