The promise of workplace AI was always time: hours handed back to employees buried in routine work. A new study suggests the hours are real and that most companies are quietly losing them again.
According to research from Workday, surveying 3,200 business leaders, 85% of employees now save between one and seven hours a week using AI, and nearly 40% of that saved time is immediately lost to rework.
Rework is the quiet villain of the AI-productivity story. The time an employee saves by having a model draft a document or summarise a dataset is real, but if the output then has to be checked, corrected and partly redone, much of the saving evaporates. Workday’s finding puts a number on an experience many knowledge workers will recognise: the AI is fast, and then you spend the time you saved making sure it was right.
The pattern shows up across the wider 2026 research, not just Workday’s. Stanford and BetterUp researchers have described “workslop,” AI-generated content that looks polished but lacks substance, estimating that 40% of US workers received some in a recent month and putting the cost at millions a year in lost productivity for a large organisation. The throughput goes up; the quality does not always follow; and somebody downstream pays for the gap.
