•Pesticides have been determined in nutraceutical products from green tea.•More than 90 polar pesticides have been analyzed by UHPLC–QqQ-MS/MS.•American and European QuEChERS methods were tested to extract the compounds.•No clean-up steps are needed.•Acetamiprid and carbendazim were detected in the analyzed samples. A QuEChERS (quick, easy, cheap, effective, rugged, and safe) based method has been evaluated and validated for the determination and quantification of approximately 100 LC-amenable pesticides in nutraceutical products obtained from green tea (Camellia sinensis). Extraction was performed with acidified acetonitrile (acetic acid 1% (v/v)), and additional clean-up steps were not necessary. Pesticides determination was achieved using ultra high performance liquid chromatography coupled to triple quadrupole tandem mass spectrometry (UHPLC–QqQ-MS/MS). Total running time was 11min. Pesticides were quantified using matrix-matched calibration. Recoveries ranged from 70% to 117% and relative standard deviation (RSD) was lower than 20% at concentration levels of 25, 50 and 100μg/kg for intra-day precision and equal or lower than 25% for inter-day precision. Limits of quantification (LOQ) were equal or lower than 25μg/kg. The validated method was applied to commercial nutraceutical products, detecting acetamiprid (56μg/kg) and carbendazim (13μg/kg) in two samples.