The umbrella of the support and maintenance team is a very necessary accessory after the custom software development that has taken place. Support and maintenance plan is like insurance, taking care of the software that is running in the nearby devices. It is like having repair personnel at hand if anything such as a browser update has happened or a change of operating system has occurred. This plan is necessary to protect you from any future mishaps. It is great to have a standby team for your investment. How much does it cost? It will be about 15-20% cost of the cost of your development.