A payment plan agreement outlines an installment plan to repay an outstanding balance over a specified time frame. How to fill out the Installment Purchase Agreement Template for Users?1. Read through the agreement thoroughly. 2. Due date for Rent payment shall be the ______ day of each calendar month and shall be considered advance payment for that month. The Buyer agrees to pay. Download our free blank purchase agreement template in Word or PDF format: sample real estate purchase agreement template. This Agreement is made at City of Berea, Cuyahoga County, State of Ohio, on this ____ day of.