Various tools are available today to aid in the culling decisions that dairy producers are faced with on a daily basis. In order to objectively and economically cull cattle in a manner that is profitable for the dairy farm, it is essential to consider some basic health and production parameters. Determining the net present value of a dairy cow is valuable for decisions made on farm that have more than a year time horizon. It is important to consider aspects such as current and future milk production, reproductive status and health events. Current applications assess the net present value of a dairy cow in relation to that of an average fresh heifer to determine whether replacement would be more profitable. Using Dairy Comp 305, an on-farm computerized record analysis system, I analyzed various components used to determine the relative net present values of dairy cattle for a local dairy farm, McGarr Farms, currently interested in substantially downsizing their herd. This gave the producer a guideline to use when selecting cows to cull while transitioning down to a smaller herd size.