Exhibit 99.1

The expenses to be incurred by CMS Energy Corporation relating to the offering of $400,000,000 principal amount of its 3.75% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2050, under CMS Energy Corporation’s Registration Statement on Form S-3 (Registration No. 333-236742) and a related prospectus supplement filed with the Securities and Exchange Commission and dated November 19, 2020 are estimated to be as follows:

Estimated Fees

SEC Registration Fee		$	45,000
Services of Independent Registered Public Accounting Firms			45,000
Trustee Fees and Expenses			15,000
Legal Fees and Expenses			75,000
Rating Agency Fees			654,000
Printing and Delivery Expenses			8,000
Miscellaneous Expenses			15,000
Total		$	857,000