Cash contributions: The entire amount of a cash contribution is deductible up to 50 percent of your adjusted gross income in the tax year of your contribution. (abendowment.org)
And up to $ 2,500 per year of contributions benefit from a 20 % government grant. (moneysense.ca)
Entitlement to CPP is based on years of contributions, while OAS is based on years of residency in Canada. (moneysense.ca)