Robotic milking raised US dairy net returns by $3.15 per hundredweight, ERS finds

Dairy farms in the United States that had adopted robotic milking earned net returns $3.15 per hundredweight of milk higher, on average, than farms that had not, according to the US Department of Agriculture's Economic Research Service (ERS). The finding was published on 9 June 2026 in the ERS Chart of Note series by ERS economist Jonathan McFadden. In US measure a hundredweight is 100 pounds, about 45.36 kilograms.

ERS economists analysed US dairy operations using data from the Agricultural Resource Management Survey (ARMS), USDA's primary source of information on the production practices, resource use and economic well-being of America's farms and ranches. After accounting for farm attributes and operator characteristics, they found that robotic milking increased dairy net returns by $3.15 per hundredweight on average, relative to non-adopters.

Farms using more than one type of precision dairy technology, such as data support, breeding or non-robotic milking systems, did fractionally better, with net returns $3.18 per hundredweight above non-adopters. Net returns here measure profit, not revenue: they subtract a dairy's operating costs and overhead expenses from milk sales, cattle sales and other dairy-related income.

The figures come from the ERS report Precision Dairy Farming, Robotic Milking, and Profitability in the United States (ERR-356), by Jonathan McFadden and Zach Raff, published on 22 January 2026. Its summary states that robotic milking, or the use of two or more of the precision technologies studied, increases US farmers' dairy net returns by 13 percent on average.

ERS defines precision dairy farming as using technology to help manage cows more efficiently. Some of the tools are long established, such as production records for each cow and artificial insemination. Others are newer, robotic milking among them: the cow walks into a box-like stall, is milked automatically with no manual labour, and walks out again. ERS notes that US adoption of precision technologies for milking, breeding and data systems has risen steadily since 2000.

Automatic milking systems have been commercially available since the early 1990s, and much of their research and development took place in the Netherlands. When a cow enters the unit, a sensor reads her identification tag; a teat position sensor, usually a laser, guides a robotic arm that attaches and removes the teat cups. Because cows come to be milked on their own schedule, milking frequency typically settles at about 2.5 times a day, and one unit usually serves 50 to 70 cows.

An analysis in the ERS magazine Amber Waves in February 2026 showed how the sector had changed. The number of licensed US dairy herds fell by 63 percent, from 66,825 in 2004 to 24,811 in 2024, while milk production rose by 32 percent, from 170.8 billion pounds to 225.9 billion pounds. There were fewer farms, but more cows on each.

Costs differ widely by size. In 2021 the total cost of producing 100 pounds of milk was $42.71 for herds of fewer than 50 cows and $19.14 for farms with 2,000 or more. Technology spread over the same period: between 2000 and 2021 the share of milk sales coming from farms using computerized milking systems rose from 20 to 45 percent, and from farms milking cows three or more times a day from 19 to 50 percent.

Photo: Ieneach fan 'e Esk / Wikimedia Commons (CC BY-SA 4.0)

Sources: USDA Economic Research Service (Chart of Note, 9 June 2026; report ERR-356; Amber Waves), Wikipedia