Definition of '90-Age Formula '
An equation used by Canadian retirees to calculate how much money to withdraw each year from their Registered Retirement Income Funds (RRIFs), a type of tax-advantaged individual retirement plan. Retirees are required to withdraw a minimum amount from the plan each year and can calculate the amount to be withdrawn using one of two formulas: the 90-age formula or the 90-percentage schedule.
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