Collecting and using metrics may not be at the forefront of all medical writers’ minds, but they can be an important asset to writers and managers, from freelancers to those working within companies, large or small. Keeping a record of pertinent details of writers’ work and information about the department can help plan, determine resources, set timelines, assess budgetary needs, respond to new business enquiries, and update curriculum vitae, to name but a few of the benefits. This article explains what medical writing metrics are and how they can be used to the advantage of writers and managers.