The amount of time required for bespoke CRM development will vary greatly depending on the size and scope of the project. Developing CRM software for a small business could take as little as a few weeks depending on various factors such as the number of developers dedicated to the project. Building a large scale CRM system on the other hand could take as long as a year with a dedicated CRM development team. Another factor to consider is what departments your CRM solution will be integrating and mediating. The more departments your CRM will be tracking, the more work involved in the development of your software.