The formula involves ascertaining your former partner's equity stake, assessing the business worth, and determining the buyout sum. Buying out a business partner is a complicated process.You may use the conventional partnership buyout calculation to estimate the value of your partner's share in the business. This guide outlines the essential procedures for buying a stake from a business partner. These include creating the motivation behind the buyout. In this video, small business lawyer Sarah Holmes will guide you step-by-step on how to successfully buy out your business partner. What if a business partner wants to buy out your ownership? An Irvine business lawyer helps you to understand what to do in this situation. A partnership buyout agreement lets you plan what will happen when a partner leaves the business. The Offeror must fill out the following blocks on the form: (1).