Old Age Security (OAS) is a federal income support program providing monthly payments to Canadians aged 65 and older who meet residency requirements. Unlike the Canada Pension Plan based on employment contributions, OAS is funded from general tax revenue and available to most seniors regardless of work history. Low-income seniors may receive additional Guaranteed Income Supplement (GIS) payments. OAS amounts are indexed to inflation and may be reduced (clawed back) for higher-income recipients. These payments help seniors maintain income in retirement, affecting local economies as seniors spend in their communities. Municipal services often support senior populations who rely partially on OAS income.