Finance

What is earned value in construction?

Earned value is the budgeted cost of the work actually completed. Compared with planned value and actual cost, it shows whether a job is ahead or behind on both money and time.

Two construction professionals review paper plans beside a tablet at a jobsite workbench.
Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

Earned value (EV) is the budget amount for the work that is actually in place. If a $200,000 budget line is 40 percent complete, it has earned $80,000 of value, no matter what was spent. Earned value management (EVM) uses three numbers together: planned value (what should be done by now), earned value (what is done), and actual cost (what it cost). The gaps between them show cost and schedule performance in one view.

The core formulas

Earned value formulas
MeasureFormulaWhat it tells you
Cost variance (CV)EV minus ACNegative means over budget for the work done
Schedule variance (SV)EV minus PVNegative means behind plan
Cost performance index (CPI)EV divided by ACBelow 1.0 means each dollar buys less than a dollar of planned work
Schedule performance index (SPI)EV divided by PVBelow 1.0 means work is going slower than planned
Estimate at completion (one common method)Budget at completion divided by CPIProjected final cost if efficiency stays the same

How earned value works on a real job

A mechanical contractor has a $900,000 cost budget for ductwork and piping on a medical office building. At the end of month four:

  • Planned value: the schedule said $400,000 of budgeted work should be done.
  • Earned value: the PM measures installed quantities and finds 40 percent complete, so EV is $360,000.
  • Actual cost: the job cost report shows $410,000 spent.

Cost variance is $360,000 minus $410,000, or negative $50,000. CPI is about 0.88. Schedule variance is negative $40,000 and SPI is 0.90. The job is both over cost and behind. If the CPI holds, the estimate at completion is roughly $1,025,000, about $125,000 over budget. That is a forecast worth arguing about now, not after the last duct run. The SPI also warns the PM that adding a second crew may be cheaper than paying for a late finish.

Common mistakes

  1. Measuring percent complete by money spent. That makes EV equal AC and hides every overrun. Use installed quantities, milestones, or units.
  2. Letting planned value drift. PV should come from the baseline schedule, not the latest update.
  3. Applying one CPI to a whole job. Labor may run at 0.80 while subs run at 1.0. Track by cost type.
  4. Treating the CPI formula as gospel. It assumes past efficiency continues. A bad month from a one-time problem can overstate the overrun, so pair it with a real cost to complete.

Related terms

Earned value ties to the percentage of completion method, labor productivity, variance, and the work breakdown structure. The guide on how to find margin fade on construction projects puts these numbers to work.

Frequently asked questions

What is the difference between earned value and percent complete?

Percent complete is the fraction of work finished. Earned value turns that into dollars by multiplying it by the budget.

Is earned value only for large projects?

No. Large federal and owner-run projects often require formal EVM, but any contractor can use the three numbers on a single job or cost line.

What is a good CPI?

1.0 means the work is costing exactly what was budgeted. Above 1.0 is under budget for work done, below 1.0 is over.

How is planned value calculated?

Spread the budget across the baseline schedule by activity, then add up the budgeted cost of everything scheduled to be complete by the status date.

Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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