Capacity UtilisationCU
Capacity utilisation is the share of an economy’s or industry’s productive capacity that is in use. High readings suggest little spare capacity, which can add to inflationary pressure.
Capacity utilisation measures how much of an economy's or an industry's sustainable production capacity is actually being used. High readings suggest factories are running hot and prices may face upward pressure; low readings point to slack. In the US the Federal Reserve publishes it monthly, while in Europe it comes from business surveys.
- Category
- Fundamentals and Macroeconomics
- Reading time
- 4 min
- Also called
- Capacity utilization rate, Operating rate, Plant utilisation
- Updated
Capacity utilisation in plain words
In the US, the Federal Reserve publishes capacity utilisation alongside industrial production, covering factories, mines and electric and gas utilities.1
The rate is seasonally adjusted output divided by capacity, shown as a percentage.1 Capacity here means the output a sector could sustain, not its absolute maximum.1
Central banks watch it because demand pressing hard against an economy's capacity tends to push up prices.2
How to read a capacity utilisation figure
Find the release
In the US, use the Fed's monthly G.17 release; it covers manufacturing, mining, and electric and gas utilities.1
Understand the ratio
Divide the seasonally adjusted output index by the capacity index and express it as a percentage.1
Compare with history
Judge the level against the series' own long-run average rather than against 100%.
Check the trend
Several months of rising readings matter more than one move.
Look at Europe too
For the euro area, use the European Commission's quarterly business surveys, which measure utilisation directly.2
Link it to inflation
Read it together with other slack measures, such as the output gap and how far unemployment sits from its non-inflationary level.2
Worked examples
Example 1 — Computing the rate
85% utilisationA hypothetical industry has an output index of 102 and a capacity index of 120.
| Output index | 102 |
| Capacity index | 120 |
| Utilisation | 85% |
102 ÷ 120 = 85%: output as a share of capacity is the utilisation rate.1
Example 2 — Tight capacity
Rising inflation riskA hypothetical reading rises from 78% to 84% over a year.
| Start | 78% |
| End | 84% |
| Change | +6 points |
Rising utilisation hints at building price pressure, which is why policymakers watch it.2
Example 3 — Survey answer
80% utilisationA hypothetical European firm says it could raise output by 25% with present resources.
| Possible increase | 25% |
| Formula | 100/(1+0.25) |
| Utilisation | 80% |
The survey turns a firm's answer into a rate with CU = 100 ÷ (1 + expected increase ÷ 100); a firm that could not raise output scores 100%.3
US and euro-area measures
| Aspect | Fed G.17 (US) | EC survey (euro area) |
|---|---|---|
| Method | Output index vs capacity index | Firms' survey answers |
| Frequency | Monthly | Quarterly |
| Coverage | Manufacturing, mining, utilities | Industry and services |
| Main use | Inflation and cycle tracking | Euro-area slack assessment |
Where capacity utilisation is used
Inflation outlook
High readings can foreshadow Inflation pressure.
Policy expectations
Traders link tight capacity to Central Bank tightening.
Business cycle
Falling readings often appear near a Recession.
Sector analysis
Industry readings help judge pricing power and capex needs.
Advantages and disadvantages
Advantages
- Directly measures slack in industry.
- Published regularly by official bodies.
- Useful for inflation and policy forecasts.
- Available by industry.
Disadvantages
- Capacity is estimated, not observed.
- US data cover only part of the economy.
- Survey measures depend on firms' judgement.
- Data are revised after release.
Going deeper
Read as far as you need. Each level builds on the one before it.
What capacity means
Beginner
Capacity is not a hard ceiling but an estimate of output that could be sustained over time.1
Survey-based measures
Intermediate
Slack and inflation
Advanced
Policymakers combine several slack measures — the output gap, unemployment relative to its non-inflationary rate, and capacity use.2 The link to inflation is loose: globalisation and new investment can let utilisation run high without prices rising much.
Common mistakes
Expecting 100%
Normal readings sit well below 100%.
Mixing measures
Fed and EC numbers use different methods and are not directly comparable.
Ignoring revisions
Early readings are often revised.
Treating it as the whole economy
US data leave out most services, unlike Gross Domestic Product.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- Utilisation is output as a share of capacity.
- The Fed publishes it monthly in G.17.
- Euro-area data come from EC business surveys.
- High readings hint at inflation pressure.
- Compare readings with history, not with 100%.
Frequently asked questions
What is a high reading?
How often is it published?
Does it move markets?
Further learning
- Economic Indicator
How macro data are used.
- Inflation
The main risk tight capacity signals.
- Gross Domestic Product
The broader output measure.
- Federal Reserve
Publisher of the US data.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- Board of Governors of the Federal Reserve System. About the G.17 Industrial Production and Capacity Utilization release (opens in a new tab) Checked .
- European Central Bank. Capacity utilisation in the euro area: measures and implications (Monthly Bulletin, October 2007, Box 5) (opens in a new tab) Checked .
- European Commission (DG ECFIN). Business and consumer surveys – Methodological concepts (opens in a new tab) Checked .
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