People's United Financial (PBCT) 10-K 2015 FY Annual report

Exhibit 99.1

Impact of Inflation

The Consolidated Financial Statements and other financial information presented in the Annual Report (on Form 10-K) have been prepared in conformity with U.S. generally accepted accounting principles, which require the measurement of financial position and operating results in terms of historical dollars without considering changes in the relative purchasing power of money over time due to inflation. Unlike most industrial companies, virtually all of the assets and liabilities of a financial institution are monetary in nature. As a result, interest rates have a more significant impact on a financial institution’s performance than the effects of general levels of inflation. Interest rates do not necessarily move in the same direction or in the same magnitude as the prices of goods and services.