A lack of electricity has devastating consequences for any economy. Since early 2015, Zambia experienced a 2,100 gigawatt-hours (GWh) power deficit triggering countrywide power rationing. We assess the impact of power rationing on Zambia’s agricultural sector, and the costs to firms operating in the agricultural sector. Our analysis reveals economy-wide losses amounting to ZMW 32,496,100,813 (representing 18.8% of the GDP). Losses to the agricultural sector are estimated at ZMW 2,827,160,771 (representing 1.6% of the GDP), and are likely to stifle future economic growth.