Punctuality is a sign of professionalism and helps you stand out as a reliable and trustworthy employee. If you don’t get your part of a project completed on time, you keep others from being able to finish their tasks. Being punctual helps establish your reputation as a dependable and consistent worker. In an interdependent work environment, everything runs like a well-oiled piece of machinery. Being on time helps ensure that you’re doing your best to keep things running smoothly.