You can expect to pay around $10 a pound for beef tenderloin throughout the year, as of July 2014. However, the cost of grain, weight at slaughter, consumer demand and rarely, instances of mad cow disease, cause the price of tenderloin -- and all other cattle-industry products -- to fluctuate as much as $4 to $5 on a week-to-week basis.
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Factors Affecting Price
For example, during the week of July 25, 2014 to July 31, 2014, tenderloin averaged $11.64 across 820 stores, according to the U.S. Department of Agriculture's weekly retail beef activity report. The week prior, tenderloin averaged $8.59 across 120 stores. There was a greater demand, possibly due to grilling season during the week of July 25, 2014 that caused prices to drop. You usually find lower prices during the summer and higher prices in cold months, but it isn't a hard-and-fast rule.