EXHIBIT 12 MICHIGAN BELL TELEPHONE COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Dollars in Millions) Nine Months Ended September 30 ------------- 1996 1995 ---- ---- 1. EARNINGS a) Income before interest expense, income taxes and undistributed equity earnings (3)................. $ 738.2 $ 675.8 b) Single Business Tax (2).............. 24.0 22.9 c) Portion of rental expense representative of the interest factor (1)(2).............. 9.3 9.9 -------- -------- Total 1(a) through 1(c)................. $ 771.5 $ 708.6 -------- -------- 2. FIXED CHARGES a) Total interest expense including capital lease obligations ......... $ 63.3 $ 68.6 b) Capitalized interest................ 1.5 1.2 c) Portion of rental expense representative of the interest factor (1)................ 9.3 9.9 -------- -------- Total 2(a) through 2(c)................ $ 74.1 $ 79.7 -------- -------- 3. RATIO OF EARNINGS TO FIXED CHARGES...... 10.41 8.89 ===== ==== (1) One-third of rental expense is considered to be the amount representing return on capital. (2) Earnings are income before income taxes and fixed charges. Since the Single Business Tax (the Tax) and rental expense have already been deducted, the Tax and the one-third portion of rental expense considered to be fixed charges are added back. (3) The results for the first nine months of 1995 reflect a $75.3 million pretax credit primarily from settlement gains resulting from lump sum pension payments from the pension plan to former employees who left the business in the nonmanagement work force restructuring.