Penggunaan layanan paylater di Indonesia telah berkembang pesat, memungkinkan jutaan konsumen untuk melakukan pembelian tanpa pembayaran di muka. Meskipun memudahkan transaksi, layanan ini berpotensi mendorong perilaku pembelian impulsif, yang dapat berdampak negatif bagi individu. Penelitian ini bertujuan untuk menguji pengaruh neurotisme dan konformitas terhadap pembelian impulsif pada pengguna paylater. Data dikumpulkan dari 755 pengguna paylater berusia 18-40 tahun. Instrumen penelitian yang digunakan adalah Big Five Inventory (BFI) dimensi neuroticism, The Conformity Scale (TCS), Impulsive Buying Tendency Scale (IBT) dan Buying Impulsiveness Scale (BIS). Hasil menunjukkan bahwa neurotisme dan konformitas berpengaruh signifikan terhadap pembelian impulsif (F(2, 752) = 81.50; p < .001) dengan kontribusi sebesar 17,8%. / The use of paylater services in Indonesia has grown rapidly, allowing millions of consumers to make purchases without upfront payments. Although facilitating transactions, this service has the potential to encourage impulsive buying behavior, which may negatively impact individuals. This study aims to examine the influence of neuroticism and conformity on impulsive buying among paylater users. Data were collected from 755 paylater users aged 18-40 years. The research instruments used include the neuroticism dimension of the Big Five Inventory (BFI), The Conformity Scale (TCS), Impulsive Buying Tendency Scale (IBT) and Buying Impulsiveness Scale (BIS). Results indicate that neuroticism and conformity have a significant effect on impulsive buying behavior (F(2, 752) = 81.50; p < .001) with a contribution of 17.8%.