Ending the COVID-19 pandemic requires effective implementation of vaccination programs in all countries. Information on the cost of vaccine procurement and delivery is paramount for effective planning and budgeting, especially in low- and middle-income countries (LMICs) given their budget constraints. We estimated regional and national costs to scale up COVID-19 vaccinations in 132 LMICs under different scenarios. We defined three priority groups: 1) healthcare workers; 2) population at high risk of severe COVID-19; and 3) adults with low risk of mortality and morbidity. We assumed that 70% of the population needs to be vaccinated to reach vaccine herd immunity. We used publicly available data on procurement pricing, delivery costs, and population size. We compared the price tag estimates to the countries’ historical annual immunization spending. We estimated a total cost of USD74 billion to reach vaccine herd immunity in LMICs. Of this total, 67% (USD50 billion) is for vaccine procurement, 33% (USD24 billion) is for vaccine delivery, 6% (USD4·2 billion) is to vaccinate high-risk populations, and 0.6% (USD0·46 billion) is to vaccinate healthcare workers. Twenty percent of LMICs have a price tag that is at least 10 times their baseline annual immunization spending.