COVID-19 school closures initially revealed more than 75 per cent of children lacked access to critical digital learning opportunities. Three out of four were living in the poorest 40% of households. Digital learning is impossible without connectivity and electricity. However, in places like Chad, Malawi and Niger, the proportion of people with access to electricity is below 1 in 5. What efforts will ensure these children are not further left behind in future crises if schools are again closed? How much will universal access to digital learning cost? The answer is US$1.4 trillion. This paper estimates the cost of universalizing digital learning by 2030, in alignment with the conceptual framework of the Reimagine Education initiative. It provides a rationale for cost assumptions; classifies costs into enabling digital learning and delivering digital learning; and, finally, discusses financing achievability by comparing the estimated costs with current spending in education and other sectors.