How long does it typically take an organisation to see measurable productivity returns from AI investment?

The sources indicate that most organizations have not yet seen measurable productivity returns from AI investments, with over 80% of companies reporting no gains despite significant spending [1][8]. Micro-level improvements, such as faster task completion, exist but fail to translate into firm-wide productivity enhancements, often offset by issues like rework costs (nearly 40% of expected gains) and system complexity [2][3][10]. While some firms claim short-term wins in areas like product development, these are not widespread, and 95% of AI pilots fail to deliver broader results [4][5][6]. Expectations point to potential gains over the next three years, with average projected productivity increases of 1.4% and output growth of 0.8%, though only 25% of AI experiments have reached production so far, with 54% anticipating this in the coming months [1][7][11]. However, the sources do not specify a typical timeline for measurable returns, as current data shows gains remain elusive and heterogeneous across sectors, with strengthening expected in 2026 [9][12].