Don't neglect to write a business pre-nup before putting money into a venture.

But Sell Agreements are binding contracts between co-owners that control when owners can sell their interest, who can buy an owner’s interest, and what price will be paid. These agreements come into play when an owner retires, goes bankrupt, becomes disabled, gets divorced, or dies -- in other words, a buy-sell agreement is a sort of prenuptial agreement between business co-owners. Mainly these agreements guide buyouts between the owners themselves; that's why we like to call them buyout agreements.

Buy-sell, or buyout, agreements have also been used successfully to lower estate taxes in intergenerational businesses -- businesses where at least one co-owner plans to leave the interest to heirs who will remain active in the business. This can help a family business owner pass the business on to children or other relatives without burdening them with unnecessary estate taxes caused by an aggressive value of the business. The key for estate planning is choosing a conservative price or valuation formula for the business in the buy-sell or buyout agreement. The result can be to legally set the value of the ownership interest at an amount considerably lower than its sales value at the time of death.

Buy-sell agreement can be in the form of a cross-purchase plan or a repurchase (entity or stock-redemption) plan. For greater neutrality and effectiveness of the buy-sell arrangement, the service of a corporate trustee is recommended.