Filed Pursuant to Rule 433
Registration Statement No. 333-133966
Dated January 9, 2008
Commonwealth Edison Company
$450,000,000 FIRST MORTGAGE 6.45% BONDS, SERIES 107, DUE 2038
FINAL TERMS AND CONDITIONS
| Issuer: | Commonwealth Edison Company | |
| Ratings: | Baa2 (Stable) (Moody’s) BBB (Positive) (S&P) BBB (Stable) (Fitch) | |
| Principal Amount: | $450,000,000 | |
| Title of Securities: | First Mortgage 6.45% Bonds, Series 107, due 2038 | |
| Legal Format: | SEC-Registered (Registration No. 333-133966) | |
| Settlement Date: | January 16, 2008 | |
| Maturity Date: | January 15, 2038 | |
| Issue Price: | 99.698% of principal amount, plus accrued interest, if any, from January 16, 2008 | |
| Coupon: | 6.45% | |
| Benchmark Treasury: | 4.750% due February 15, 2037 | |
| Spread to Benchmark: | 215 basis points (2.15%) | |
| Treasury Yield: | 4.323% | |
| Reoffer Yield: | 6.473% | |
| Interest Payment Dates: | Semi-annually on January 15 and July 15, commencing on July 15, 2008 | |
Redemption Provisions: Make-whole call: | At any time at a discount rate of Treasury rate plus 35 basis points | |
| CUSIP: | 202795 HT0 | |
Joint Book-Running Managers: | Deutsche Bank Securities Inc. Merrill Lynch, Pierce, Fenner & Smith Incorporated UBS Securities LLC | |
| Senior Co-Managers: | BNP Paribas Securities Corp. Scotia Capital (USA) Inc. SunTrust Robinson Humphrey, Inc. Wedbush Morgan Securities Inc. | |
| Co-Managers: | Jackson Securities LLC Muriel Siebert & Co., Inc. | |
The issuer has filed a registration statement (including a prospectus) with the U.S. Securities and Exchange Commission (SEC) for this offering. Before you invest, you should read the prospectus for this offering in that registration statement, and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free by searching the SEC online database (EDGAR®) atwww.sec.gov. Alternatively, you may obtain a copy of the prospectus from Deutsche Bank Securities Inc. by calling 1-800-503-4611, Merrill Lynch, Pierce, Fenner & Smith Incorporated by calling 1-866-500-5408, or UBS Securities LLC by calling 1-888-722-9555, ext. 337-1088.
