Under the agreement, you'll make monthly payments toward your unpaid tax balance. The fastest and easiest way to request an IPA is through your Online Services account.You can make your request online. The IRS Online Payment Agreement system lets you apply and receive approval for a payment plan to pay off your balance over time. 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. How do I fill this out? A payment agreement is a simple document that explains how money will change hands between two people or two parties. No organization should have to fill out the entire Data Form more than once. A payment plan agreement outlines an installment plan to repay an outstanding balance over a specified time frame. Oral agreements won't be acceptable in a court of law.