Learn the steps for a smooth business partner buyout. Our guide simplifies how to buy out a business partner effectively.This Addendum is used when the Seller is financing all or a part of the purchase price. 26-8 Redline 11.2022. In this guide, we will explain what buying out a business partner means, how to prepare to buy out a business partner, and more. Are you planning to purchase a business? Learn more about the process as well as your rights and responsibilities as a buyer. Once both parties have agreed to the terms of the buyout, get everything in writing, including any future payments. Finalize the Buyout Agreement: Make sure that all terms of the buyout are clearly laid out in a legally binding agreement. Here the buyer and seller work out an agreement where the buyer makes monthly payments to the seller in exchange for ownership of the company.