Workers can contribute up to $5,500 to an IRA in 2015 or $6,500 if they are age 50 and older. Saving this amount requires a contribution of $458 per month or $542 for people age 50 and older.orkers can contribute up to $5,500 to an IRA in 2015 or $6,500 if they are age 50 and older. Saving this amount requires a contribution of $458 per month or $542 for people age 50 and older.