All of our contracts come with lifetime updates! Simply login to your contract portal and download the latest version of your template.A business contract is a legally binding agreement between at least two parties that relates to some aspect of business operations. I've never made a contract or been paid before, so I'm not quite sure how to draw up a contract. What should I include? List of all current AIA Contract Documents. Learn how to craft effective client contracts in just 10 simple steps. Protect your business and foster trust with clear, concise agreements. In most practical cases, it's the main contractor who has the pre-prepared contract document before contracting the subcontractor.