In the Tatric Unit (Western Carpathians, Slovakia), high-temperature molybdenite mineralisation was formed contemporaneously with Variscan granitic rocks hosting economically important Au–Sb mineralisation. In this work, four molybdenite separates were taken from representative samples of mineralised granite at the Pezinok – Trojárová and Dúbrava deposits. Re–Os ages of 368.6±1.4 and 356.7±2.6 Ma (Trojárová) together with Re–Os ages of 349.2±1.3 and 348.3±1.3 Ma (Dúbrava) suggest a long-lived mineralisation processes. Our Re–Os molybdenite ages are in agreement with recently published U–Th–Pb single-grains zircon and/or electron-microprobe monazite magmatic ages from hosting granite intrusions. These Re–Os ages mirror the principal periods of granite-forming processes connected with Variscan subduction-collision in the Tatric Unit of the Western Carpathians, that are: subduction stage (369–360 Ma), collision peak (357–349 Ma), and post-collisional extension (345–332 Ma).