Exhibit 99.1

Orrick, Herrington & Sutcliffe LLP 

51 WEST 52^ND STREET

NEW YORK, NEW YORK 10019-6142

October 1, 2015

Credit Suisse
11 Madison Avenue
New York, New York 10010

Ladies and Gentlemen:

We have acted as special tax counsel to Credit Suisse AG, a corporation incorporated under the laws of Switzerland (the “Company”), in connection with the preparation and filing of each pricing supplement or term sheet, as applicable, identified in Exhibit A attached hereto (each, a “Pricing Supplement”), to the underlying supplement and product supplement referenced therein, if applicable, to the prospectus supplement dated May 4, 2015 for the Company’s Senior Medium-Term Notes and Subordinated Medium-Term Notes relating to the prospectus dated May 4, 2015 contained in the Company’s Registration Statement (No. 333-202913) (the “Registration Statement”). This opinion is being furnished in accordance with the requirements of Section 601(b)(8) of Regulation S-K of the Securities Act of 1933, as amended (the “Act”).

In our opinion, the discussions under the headings “Material U.S. Federal Income Tax Considerations” in each Pricing Supplement and “Material United States Federal Income Tax Considerations” in each related product supplement, subject to the conditions and limitations described therein, set forth the material U.S. federal income tax considerations applicable generally to holders of the securities offered pursuant to each Pricing Supplement as a result of the ownership and disposition of such securities.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement and to the references to us in each Pricing Supplement and related product supplement. By such consent we do not concede that we are an “expert” for the purposes of the Act.

Very truly yours,

/s/ Orrick, Herrington & Sutcliffe LLP

Exhibit A

Title of Securities	Date of Pricing Supplement	Pricing Supplement No.
Accelerated Return Notes® Linked to an International Equity Index Basket	September 24, 2015	ARN-42
Accelerated Return Notes® Linked to the JPX-Nikkei Index 400	September 24, 2015	ARN-43
Accelerated Return Notes® Linked to the S&P 500® Index	September 24, 2015	ARN-44
Autocallable Market-Linked Step Up Notes Linked to the S&P Oil & Gas Exploration & Production Select Industry Index	September 24, 2015	SUN-77
Market-Linked Step Up Notes Linked to the S&P 500® Index	September 24, 2015	SUN-78
Absolute Return Barrier Securities due October 1, 2020	September 28, 2015	T625