Under the agreement, you'll make monthly payments toward your unpaid tax balance. A payment plan agreement outlines an installment plan to repay an outstanding balance over a specified time frame.A payment agreement should always be in writing and include information regarding the type of payment to be given, when it should be given, how it will be paid. Use our free payment plan agreement form to spell out all the terms and conditions of a loan if you need to establish a payment schedule with someone. Use Form 9465 to request a monthly installment plan if you cannot pay the full amount you owe shown on your tax return (or on a notice we sent you). This letter is to let you know that I'm currently having some financial difficulties. I'm not able to pay the complete monthly payment on my account because . I am hoping you will accept a reduced payment of per month. Amounts will be increased as soon as possible until the debt is totally paid. ENF003 Installment Payment Order.