Old Age Security

High Quality Content by WIKIPEDIA articles! The Old Age Security pension (or OAS or OAS-GIS) is a taxable monthly social security payment available to most Canadians 65 years of age or older. As of July, 2011, the basic amount is C$533.70 per month. At tax time, recipients with 2010 incomes over C$67,668 must pay back a portion of their Old Age Security at a rate of 15% of net income. This is often referred to as a clawback. The OAS pension is fully clawed back for people with incomes over C$110,038.