If you can pay your credit within 120 days, setting up a payment plan won`t cost you anything. Although interest and late payment penalties continue to be imposed on imputed taxes, non-payment of the tax rate is halved, while a phased agreement is in effect. The usual penalty rate of 0.5 per cent per month is reduced to 0.25 per cent. For the calendar quarter from 1 July 2020, the interest rate for underpayment is 3 per cent. Clarification and extension of the conditions of form 9465 temp tation contracts. The waiver or refund of user fees applies only to taxpayers with adjusted gross income, as for the last year for which such information is available, at or less than 250% of the current federal poverty line (low-income taxpayers) who enter into long-term payment plans (instalment payment agreements) on or after April 10, 2018. . .