A field experiment was conducted to evaluate the effect of different NPK fertility levels and split application schedules of nitrogen and potassium on nutrient uptake and nutrient-use efficiency in sweet corn (Zea mays var. saccharata). Three NPK fertility levels, viz., 50, 75 and 100% of the recommended dose, were evaluated in combination with three nutrient application schedules. Among the fertility levels, application of 100% recommended NPK (150:65:65 kg NP₂O₅K₂O ha⁻¹) recorded the highest uptake of nitrogen (130.59 kg ha⁻¹), phosphorus (27.45 kg ha⁻¹), potassium (127.90 kg ha⁻¹) and sulphur (14.20 kg ha⁻¹). Similarly, four-stage application of nitrogen and potassium at basal, 15, 30 and 45 days after sowing (DAS) resulted in the highest uptake of nitrogen (118.69 kg ha⁻¹), phosphorus (22.98 kg ha⁻¹), potassium (122.00 kg ha⁻¹) and sulphur (11.94 kg ha⁻¹). The highest nitrogen (50.39%) and phosphorus (32.99%) recovery efficiencies among fertility levels were recorded under 100% NPK, whereas potassium recovery efficiency was highest (161.73%) under 50% NPK. Among the application schedules, four-stage splitting recorded the highest recovery efficiencies of nitrogen (56.69%), phosphorus (34.23%) and potassium (164.18%). In contrast, 50% NPK recorded the highest agronomic efficiencies of nitrogen (33.36 kg kg⁻¹) and phosphorus (76.99 kg kg⁻¹), as well as the highest physiological efficiencies of nitrogen (69.52 kg kg⁻¹) and phosphorus (310.87 kg kg⁻¹). The interaction between fertility levels and application schedules significantly influenced agronomic efficiency, with L₁S₂ recording the highest values for nitrogen and phosphorus. Overall, higher NPK fertility enhanced nutrient uptake, while appropriately timed split application improved nutrient recovery and agronomic efficiency in sweet corn.