| CILCORP      INC.Computation      of Ratio of Earnings to Fixed Charges(Thousands      of Dollars, Except Ratios) |                |
|-------------------------------------------------------------------------------------------------------------------|---------------------|
|                                                                                                              |                |   |   |   |   |
|                                                                                                              |                |   |   |   |   |
|                                                                                                              | 6      Months Ended |   |   | Year      Ended |   |
|                                                                                                              | June      30,       |   |   | December      31, |   |
|                                                                                                              | 2008                |   |   | 2007 |   |
| Net      income from continuing operations                                                                        | $                   | 24,450 |   |   | $ | 49,402 |   |
| Less-      Change in accounting principle                                                                         |                | - |   |   |   | - |   |
| Add-      Taxes based on income                                                                                   |                | 12,325 |   |   |   | 21,018 |   |
| Net      income before income taxes and change in accounting    principle                                         |                | 36,775 |   |   |   | 70,420 |   |
|                                                                                                              |                |   |   |   |   |   |   |
| Add-      fixed charges:                                                                                          |                |   |   |   |   |   |   |
| Interest on long term      debt (1)                                                                          |                | 27,457 |   |   |   | 62,824 |   |
| Estimated      interest cost within rental expense                                                                |                | 186 |   |   |   | 343 |   |
| Amortization      of net debt premium, discount,and      expenses                                                 |                | 697 |   |   |   | 1,322 |   |
| Subsidiary      preferred stock dividends                                                                         |                | 918 |   |   |   | 1,869 |   |
| Adjust      preferred stock dividends to pre-taxbasis                                                             |                | 463 |   |   |   | 812 |   |
| Total      fixed charges                                                                                          |                | 29,721 |   |   |   | 67,170 |   |
|                                                                                                              |                |   |   |   |   |   |   |
| Less:      Adjustment of preferred stock dividends to pre-tax basis                                               |                | 463 |   |   |   | 812 |   |
|                                                                                                              |                |   |   |   |   |   |   |
| Earnings      available for fixed charges                                                                         | $                   | 66,033 |   |   | $ | 136,778 |   |
|                                                                                                              |                |   |   |   |   |   |   |
| Ratio      of earnings to fixed charges                                                                           |                | 2.22 |   |   |   | 2.03 |   |
|                                                                                                              |                |   |   |   |   |   |   |
| (1)  Includes      FIN 48 interest expense                                                              |                |   |   |   |   |   |   |