Capacity Utilization

Capacity utilization is released as part of the Federal Reserve's monthly Industrial Production and Capacity Utilization report. It is calculated by dividing actual industrial production output by an estimate of total sustainable production capacity, expressed as a percentage. A reading of 80% means the industrial sector is using 80 cents of every dollar of productive capacity available.

Historically, the long-run average capacity utilization rate for U.S. industry has hovered around 79% to 80%. When the rate climbs materially above this average — say, above 85% — it suggests that factories and utilities are operating near their limits, which can create bottlenecks, lead times for capital equipment stretch out, and upward pressure on producer prices builds. The Federal Reserve watches high utilization rates as a potential harbinger of inflationary pressure in the goods-producing sector.

Conversely, when capacity utilization falls sharply below its historical average — as it did during the 2008-2009 financial crisis when it dropped to approximately 66% — it signals significant slack in the industrial economy. Excess capacity discourages new business investment, as companies have no incentive to build new plants or buy new equipment when existing facilities are sitting idle. Prolonged low utilization can weigh on capital goods orders, employment in manufacturing, and corporate profitability in the industrial sector.

Analysts study capacity utilization alongside industrial production to distinguish between two scenarios: a drop in output caused by lack of demand (utilization falls with output) versus a drop caused by temporary disruptions such as severe weather or supply chain failures (utilization may fall even as capacity remains intact). Breakdowns by industry segment — auto assembly rates, semiconductor fabrication utilization, and oil refinery runs — are closely watched by sector analysts.

For equity investors, high and rising capacity utilization can support pricing power for industrial companies and signal a favorable environment for capital equipment makers, as businesses eventually need to expand capacity to meet sustained demand.