CMS ENERGY CORP — Capital/Financing Update 2010

Sep 20, 2010

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Filed under Rule 433 File No. 333-153353

Final Term Sheet September 20, 2010

Issuer:	CMS Energy Corporation
Security:	4.25% Senior Notes due 2015
Aggregate Principal Amount Offered:	$250,000,000
Maturity:	September 30, 2015
Annual Interest Rate:	4.25%
Yield to Maturity:	4.274%
Spread to Treasury:	285 basis points
Benchmark Treasury Security:	1.25% due August 31, 2015
Benchmark Treasury Yield:	1.424%
Interest Payment Dates:	March 30 and September 30
First Interest Payment Date:	March 30, 2011
Public Offering Price:	99.892%
Optional Redemption:	Make-whole call at any time at Treasury rate plus 50 basis points
Trade Date:	September 20, 2010
Settlement Date:	September 23, 2010 (T+3)
Ratings:	Ba1 / BB+ / BB+ (Moody’s / S&P / Fitch) Note: A securities rating is not a recommendation to buy, sell or
hold securities and may be subject to revision or withdrawal at any time
Joint Book-Running Managers:	J.P. Morgan Securities LLC Banc of America Securities LLC Barclays Capital Inc. Citigroup Global Markets Inc. Deutsche Bank Securities Inc.
Co-Managers:	KeyBanc Capital Markets Inc. SunTrust Robinson Humphrey, Inc.
CUSIP/ISIN:	125896BF6 / US125896BF61

CMS Energy Corporation has filed a registration statement (including a prospectus) with the Securities and Exchange Commission (“SEC”) for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents CMS Energy Corporation has filed with the SEC for more complete information about CMS Energy Corporation and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, CMS Energy Corporation, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling J.P. Morgan Securities LLC collect at (212) 834-4533, Banc of America Securities LLC toll-free at (800) 294-1322 , Barclays Capital Inc. toll-free at (888) 603-5847 , Citigroup Global Markets Inc. toll-free at (877) 858-5407 and Deutsche Bank Securities Inc. toll-free at (800) 503-4611.

Any disclaimers or other notices that may appear below are not applicable to this communication and should be disregarded. Such disclaimers were automatically generated as a result of this communication being sent via email or another communication system.

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