How much productivity is lost on a 50 or 60 hour week?

Per MCAA Bulletin OT1 (2011), which synthesizes four construction studies, a 50-hour week starts at about a 5 percent productivity loss in week one and reaches about 28 percent by week ten. A 60-hour week starts at about 9 percent and reaches about 39 percent by week ten. The loss compounds the longer the schedule is sustained.

What is the "point of no return" for scheduled overtime?

The Business Roundtable (Report C-2, 1980) placed the point of no return at about seven weeks for a 50-hour schedule and nine weeks for a 60-hour schedule. Past that point, cumulative output no longer exceeds what a standard 40-hour week would have produced, so the extra hours buy nothing while still costing the premium.

Where do these overtime productivity numbers come from?

MCAA Bulletin OT1 Revised (2011) is the common reference; it synthesizes the Business Roundtable (1980), NECA (1989), the U.S. Army Corps of Engineers (1979), and Dr. H. Randolph Thomas / Penn State (1997). They are directional estimates applied to your hours, not a measurement of a specific crew; the real loss depends on trade, duration, and site conditions.

Does overtime ever make sense?

Yes, for short, occasional bursts to recover a slipped milestone, where the schedule value of finishing sooner outweighs the premium and the modest early-week productivity loss. Overtime becomes a losing trade when it is sustained for weeks, because the productivity decay and rework compound while the premium never goes away.

Construction labor data

The true cost of overtime.

You pay time-and-a-half. Fatigue takes some of it back. Here is what four decades of construction research say sustained overtime actually costs, with the numbers you can cite.

The true cost of overtime is more than the premium hours. You pay a premium (typically 1.5 times base), output per hour falls as fatigue builds across consecutive long days, and the errors it causes add rework. Add the premium, the lost productivity, and the rework, and the real cost of sustained overtime often reaches 2 to 2.5 times the base rate.

Productivity falls the longer overtime runs

MCAA Bulletin OT1 (2011) synthesizes four construction studies into a productivity index that drops as weekly hours rise and consecutive weeks accumulate. The published anchor points:

Schedule	Week 1 loss	Week 10 loss
50-hour week	5%	28%
60-hour week	9%	39%

Source: MCAA Bulletin OT1 Revised (2011). Productivity index 0.95 (5% loss) to 0.72 (28% loss) for 50-hour weeks; 0.91 to 0.61 for 60-hour weeks, week 1 to week 10.

The point of no return

The Business Roundtable (Report C-2, 1980) found that after working overtime for six to eight weeks, labor cost is inflated by about 50 percent with productive returns no greater than a 40-hour week would have delivered. It set a point of no return, after which cumulative output no longer exceeds the standard week:

Schedule	Point of no return
50-hour week	~7 weeks
60-hour week	~9 weeks

Source: Business Roundtable, Report C-2, "Scheduled Overtime Effect on Construction Projects" (1980).

Run these numbers on your own project

Overtime ROI calculator

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Measured-mile explorer

Price lost productivity three ways, including the live MCAA overtime-decay curve, and put a defensible number on the loss.

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What it means for a schedule

Short and occasional wins

A brief burst to recover a milestone keeps the productivity loss small, so the schedule value can outweigh the premium.

Sustained overtime loses

Week after week, the decay compounds and rework climbs while the premium never goes away. Past the point of no return the extra hours buy nothing.

Measure, do not guess

The strongest number is your own measured mile, an unimpacted stretch of the same work compared against the overtime stretch.

Questions & answers

More than the time-and-a-half. You pay the premium, output per hour falls as fatigue builds across consecutive long days, and the errors it causes add rework. Widely cited construction studies put the real cost of sustained overtime at roughly 2 to 2.5 times the base rate once the lost productivity and rework are included.

Sources

MCAA Bulletin OT1 Revised (2011), "How to Estimate the Impacts of Overtime on Labor Productivity" — synthesizing the four studies below. mcaa.org
The Business Roundtable, Report C-2 (1980), "Scheduled Overtime Effect on Construction Projects."
National Electrical Contractors Association (NECA, 1989), "Overtime and Productivity in Electrical Construction."
H. Randolph Thomas et al., Penn State (1997), "Scheduled Overtime and Labor Productivity: Quantitative Analysis," ASCE.
U.S. Army Corps of Engineers (1979), "Modification Impact Evaluation Guide."

Track overtime before it costs you.

POD keeps overtime, output, and the rework that trails them live per crew, from the timecards and reports your team already files, so you watch the fatigue tax accrue instead of finding it at payroll close.

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Last updated: July 2026