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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsShort answer: The AIB Ireland Construction PMI is a monthly, seasonally adjusted survey index. A reading above 50 means construction companies reported more activity than in the previous month overall; below 50 means activity fell; 50 means no overall change. It is a direction and breadth signal, not a percentage growth rate or an official measure of total construction output.
The latest report available at the stated publication date is August 2026. Its Total Activity Index was 50.7, down from 53.0 in July. That means activity expanded for a second month, but only slightly and at a slower pace.
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What the AIB Construction PMI measures
The AIB Ireland Construction PMI is compiled by S&P Global from a monthly survey of construction companies in Ireland. Its headline measure is the seasonally adjusted Total Activity Index, often called the Construction PMI. Survey respondents compare business conditions with the previous month, so the index is designed to show month-on-month direction.
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The panel contains about 150 construction companies. S&P Global stratifies the panel by workforce size, using each group’s contribution to gross domestic product as part of the design. Responses are collected during the second half of each month. The August 2026 survey, for example, collected responses from 12 to 27 August and was released on 8 September 2026.
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Because respondents report whether activity was higher, unchanged or lower, the index describes how widespread a change is among firms. It does not add up the tonnes of materials installed, the value of contracts completed or the euro value of national output.
How to interpret 50, readings above it and readings below it
| Headline reading | Meaning for the month compared with the previous month | What it does not tell you |
|---|---|---|
| Above 50 | More respondents reported higher activity than lower activity after unchanged responses are weighted. | The percentage increase in construction output. |
| Exactly 50 | Reports of increases and decreases balance out after the index calculation. | That every company was unchanged. |
| Below 50 | More respondents reported lower activity than higher activity after unchanged responses are weighted. | The percentage decline in output. |
A reading of 53.0 does not mean construction output grew 3 percent. It means the survey balance was three index points above the no-change threshold. Similarly, 49.9 is not a 0.1 percent contraction. It indicates a marginally negative balance of responses.
The distance from 50 is useful for judging the strength of the reported balance, but it is not a percentage scale. A move from 50.7 to 53.0 means the balance became more positive; it does not establish that output grew by a particular number of percent.
How the diffusion-index calculation works
For each survey variable, the basic calculation is:
Index = percentage reporting “higher” + half the percentage reporting “unchanged.”
The resulting series is seasonally adjusted. If 40 percent of firms report higher activity, 20 percent report unchanged activity and 40 percent report lower activity, the unadjusted balance would be 40 + (20 ÷ 2) = 50. That is a no-change reading even though individual firms moved in opposite directions.
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This is why economists call the PMI a diffusion index. It captures the extensive margin—the share of firms experiencing a change—rather than the intensive margin, which is the size of each firm’s change. The Central Bank of Ireland makes this distinction explicitly in its analysis of the housing PMI.
Seasonal adjustment removes recurring calendar patterns so that a monthly reading is easier to compare with other months. S&P Global states that underlying survey responses are not revised after publication. Seasonal-adjustment factors can change, however, and those changes can affect the adjusted series.
Reading the August 2026 result
The August 2026 Total Activity Index was 50.7, compared with 53.0 in July. The two facts must be read together:
- The index remained above 50, so overall activity increased from July to August.
- The fall from 53.0 to 50.7 shows that the expansion became much less widespread or less decisively positive among respondents.
- Because 50.7 is only slightly above the threshold, the August increase was marginal rather than a strong acceleration.
This was the sector’s second consecutive monthly rise. It was not a return to contraction, but neither does it show that every part of construction was growing.
John Fahey, AIB Senior Economist, described the result as a second consecutive month of growth while noting that the headline eased to 50.7 from 53.0, indicating that the pace of growth slowed midway through the third quarter.
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The Total Activity Index combines several areas of construction. In August, the components moved in different directions:
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| Subsector | August 2026 direction |
|---|---|
| Commercial activity | Rose modestly. |
| Civil engineering | Was broadly unchanged. |
| Housing activity | Decreased solidly. |
A slightly positive headline can therefore coexist with a meaningful contraction in housing. When assessing the sector, first identify the aggregate direction and then inspect the subsector balances. A reader interested in residential building should not treat a 50.7 total reading as a description of housing conditions.
A practical method for reading any monthly release
- Start with the threshold. Record whether the Total Activity Index is above, at or below 50. This establishes the month-on-month direction.
- Compare with the previous month. A higher reading farther above 50 generally signals a stronger balance of positive reports; a move toward 50 signals weakening momentum even if the index remains positive.
- Separate direction from pace. Describe 50.7 as a slight expansion, not 0.7 percent growth. Describe a fall from 53.0 to 50.7 as slower expansion, not falling output.
- Check the subsectors. Review housing, commercial and civil-engineering readings before drawing conclusions about a particular market.
- Read the supporting indicators separately. New orders, employment, input prices, delivery times and expectations provide context, but none replaces the Total Activity Index.
- Check the survey dates and release date. A PMI is timely, but it describes the conditions reported during its collection window, not all activity in the month after publication.
- Pair the signal with official output data. Use the Central Statistics Office’s Production in Building and Construction Index to examine measured production and value-added changes.
What the other August indicators add
The August release contained several signals that help explain the headline without changing its meaning:
- New orders: New orders expanded for a second month and did so at a faster rate. This points to stronger incoming work in the survey, but it is not a guarantee of completed output in a later period.
- Business confidence: Confidence reached a six-month high. Expectations can influence hiring and purchasing decisions, yet confidence is a separate survey variable.
- Employment: Hiring growth slowed to a marginal pace. A positive employment balance does not imply that total activity accelerated.
- Input costs: Input prices rose more sharply, a potential margin pressure for contractors and subcontractors.
- Supplier delivery times: Delivery times lengthened. Longer waits can constrain projects even when demand indicators are improving.
These measures should be reported as supporting evidence, not folded into the headline number. A rise in new orders, for example, does not turn a 50.7 activity reading into a higher output estimate.
Does the PMI measure actual construction output?
No. The PMI measures the direction of change reported by surveyed construction companies. It does not measure the total quantity or value of work produced by every Irish construction enterprise.
For realized production, the relevant official complement is the CSO’s Production in Building and Construction Index. The Central Statistics Office describes that series as monthly statistics on the value and volume of production, with the primary purpose of measuring changes in value added at constant prices. It covers Irish enterprises in NACE Rev. 2 construction Sector F.
The two measures answer different questions:
| Measure | Question answered | Nature of evidence |
|---|---|---|
| AIB Ireland Construction PMI | Did surveyed firms report higher, unchanged or lower activity than in the previous month? | Timely, seasonally adjusted survey diffusion index. |
| CSO Production in Building and Construction Index | How did measured production and value added change? | Official monthly production statistics for Irish construction enterprises. |
Using both avoids a common error: treating a positive survey balance as proof that national output rose by the same amount.
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How reliable is the PMI as a forecast?
The PMI is valuable because it arrives quickly and can reveal turning points before official production data. It is not, however, a guarantee of the next quarter’s result.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteThe Central Bank of Ireland examined whether the housing component helps forecast housing output. In-sample model fit improved when the housing PMI was included. But a one-year pseudo-out-of-sample comparison covering 2017–2025 produced varying and inconclusive results; on average, the model without the PMI performed marginally better.
The bank’s conclusion is conditional: housing PMI readings can lead output during expansions, while the relationship weakens during contractions. The practical implication is to treat the PMI as one input alongside structural indicators, financing conditions, planning and housing-market data, not as a standalone forecast.
When a PMI signal deserves more confidence
- The headline stays clearly above or below 50 for several months.
- Subsector readings move in the same direction as the aggregate.
- New orders and employment support the activity signal.
- Official CSO production data subsequently confirm the direction.
When to be cautious
- The index is very close to 50, as 50.7 was in August.
- Housing, commercial and civil engineering diverge sharply.
- Expectations improve while current activity remains weak.
- Supply delays or cost pressures could prevent orders from becoming completed work.
- The economy is in a regime where historical PMI-output relationships have weakened.
Which index should you compare with construction?
S&P Global cautions that the construction Total Activity Index is not comparable with the headline manufacturing PMI figure. The appropriate cross-sector comparisons are the construction Total Activity Index with the Manufacturing Output Index or the Services Business Activity Index.
This distinction matters because the headline manufacturing PMI may combine output, orders, employment, suppliers and inventories in a way that differs from the construction headline. Comparing unlike index families can create a false impression that one sector is expanding more quickly simply because the measures have different definitions.
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Common mistakes and their corrections
| Mistake | Correct interpretation |
|---|---|
| “53.0 means output grew 3 percent.” | 53.0 is three index points above the no-change threshold; it is not a growth percentage. |
| “49.9 means output fell 0.1 percent.” | It signals a slightly negative survey balance, not a measured percentage decline. |
| “A positive total means housing grew.” | Subsectors can diverge; August housing activity contracted while the total remained above 50. |
| “The PMI is the official output series.” | The CSO production index measures realized production and value added; the PMI reports survey direction. |
| “One strong month proves a trend.” | Look for persistence, supporting components and confirmation from official data. |
| “The construction PMI can be compared directly with the headline manufacturing PMI.” | Use construction Total Activity against manufacturing output or services business activity measures. |
What the August reading means for different readers
For contractors and suppliers
August’s 50.7 suggests that surveyed activity was still edging higher, while the weaker headline and longer delivery times argue for caution in capacity and procurement decisions. The rise in input-cost pressure is relevant to bids and margins, but the PMI alone cannot quantify a company’s cost exposure.
For housing analysts
The housing component’s solid decrease is more relevant than the positive total. Track housing readings over subsequent releases and compare them with CSO production data and structural housing indicators.
For policymakers and investors
The combination of slight total growth, faster new-order expansion, marginal hiring growth and higher input costs presents a mixed picture: demand indicators improved, but current activity was near stagnation and cost pressures intensified. The survey is an early signal, not a complete assessment of construction output or profitability.
For anyone following the Irish economy
Use the PMI to identify turning points and changes in business sentiment, then verify the direction and scale with official statistics. Keep the month-on-month nature of the measure in mind when converting a headline into a broader economic claim.
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How to report a PMI number accurately
A precise news or business sentence should include the index, its comparison and its interpretation. For example: “Ireland’s seasonally adjusted construction Total Activity Index rose for a second consecutive month in August 2026, registering 50.7 versus 53.0 in July; activity therefore expanded slightly, but the pace of expansion weakened.”
Avoid phrases such as “construction grew 0.7 percent” or “the sector contracted because the index fell from 53.0 to 50.7.” The first converts an index into an unsupported output rate; the second confuses slower growth with contraction.
Bottom line
The AIB Construction PMI is best read as a traffic light for the direction and breadth of monthly activity. Above 50 means expansion relative to the previous month, below 50 means contraction, and the distance from 50 describes the survey balance rather than a percentage change in output. In August 2026, the 50.7 reading indicated a second, but very slight, monthly expansion after July’s 53.0. Commercial work rose modestly, civil engineering was broadly unchanged and housing fell solidly. To judge actual production or make a forecast, combine the PMI with the CSO’s official construction output index and other structural indicators.
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