Flyvbjerg et al. (2026)
Most IT projects stay near budget, but a small minority run spectacularly over
Across 5,360 IT projects, 59% finished on or below budget. But the severe-overrun group averaged 453% above budget, creating a fat tail: rare outcomes so large that ordinary averages become dangerously reassuring.
- 59.14%
- of IT projects finished on or below budget
- 18.26%
- ran more than 50% over budget