The amount that a Canadian taxpayer contributes to his or her RRSP. This amount can be deducted from the taxpayer's annual income to arrive at his or her taxable income for the year.

The RRSP deduction amount is found on line 208 of the annual income tax return filed with Canadian Revenue Agency. As this is a tax deduction from personal income, it is advantageous for taxpayers to maximize the value of their RRSP deduction - as they minimize the amount of money that is subject to personal income tax.