EXHIBIT 12 PEOPLES BANCORP INC. AND SUBSIDIARIES COMPUTATION OF RATIOS RETURN ON AVERAGE STOCKHOLDERS' EQUITY Net income/Average stockholders' equity RETURN ON AVERAGE ASSETS Net income/Average assets NET INTEREST MARGIN Fully tax equivalent net interest income/Average earning assets NON-INTEREST INCOME LEVERAGE RATIO (Non-interest income less securities and asset disposal gains and/or losses)/(Non-interest expense less intangible asset amortization) EFFICIENCY RATIO (Non-interest expenses less intangible asset amortization)/(Fully tax equivalent net interest income plus non-interest income securities and asset disposal gains and/or losses) AVERAGE STOCKHOLDERS' EQUITY TO AVERAGE ASSETS Average stockholders' equity/Average assets AVERAGE LOANS TO AVERAGE DEPOSITS Average gross loans/Average deposits DIVIDEND PAYOUT RATIO Dividends declared/Net income NONPERFORMING LOANS AS A PERCENTAGE OF PERIOD (Nonaccrual loans plus END LOANS loans past due 90 days or greater plus renegotiated loans)/Gross loans net of unearned interest NONPERFORMING ASSETS AS A PERCENTAGE OF TOTAL (Nonaccrual loans plus ASSETS loans past due 90 days or greater plus renegotiated loans plus other real estate owned)/Total assets ALLOWANCE FOR LOAN LOSSES TO PERIOD END TOTAL Allowance for loan LOANS losses/Gross net of unearned interest loans TIER 1 CAPITAL RATIO Stockholders' equity less intangible assets and securities mark-to-market capital reserve ("Tier 1 Capital")/Risk adjusted assets TOTAL CAPITAL RATIO Tier 1 Capital plus allowance for loan losses/Risk adjusted assets TIER 1 LEVERAGE RATIO Tier 1 Capital/Quarterly average assets CASH DIVIDENDS PER SHARE Cash dividends paid/Common shares outstanding at date of declaration BOOK VALUE PER SHARE Total stockholders' equity/Common shares outstanding at quarter-end TANGIBLE BOOK VALUE PER SHARE (Total stockholders' equity less goodwill and other intangible assets)/Common shares outstanding at quarter-end