While some small U.S. dairy farms earn profits and some large farms incur losses, financial performance in the dairy sector, on average, is linked to herd size. Data from 2010 (the latest available for dairy farms by herd size) show that a majority of dairy farms with milking herds of at least 1,000 cows generate gross returns that exceed total costs, while most small and mid-size dairy farms do not earn enough to cover total costs.
Total costs include annualized capital recovery as well as the cost of unpaid family labor (measured as what the farm family could earn off the farm), in addition to cash operating expenses. Many more small and mid-sized farms are able to cover total costs, except for costs associated with capital recovery.
Farms can operate in this way for years, covering operating expenses and providing a reasonable income for a farm family, until the expense of maintaining aging equipment and structures begins to erode the incomes that a family can earn from the farm. At that point, many families may decide to close the farm. Some—particularly those where a younger generation intends to continue the business—may seek financing to expand the dairy herd and realize lower costs through scale economies.
Source:usda.gov