The Ending Of Trainspotting Explained

In the film's final scene, Renton is in bed sleeping next to Begbie after the gang have managed to score £16,000 selling heroin. Renton is essentially bullied into covering the remaining cost for the heroin, but despite his reluctance, the deal manages to go off without a hitch. Before bed at the pub, Renton approaches Spud and floats the idea that they simply take the money from Sick Boy and Begbie and get the hell out, but Spud refuses out of a combination of fear and loyalty. Sick Boy posits he'd happily take the money and run, and the brooding and chaotic Begbie gets into a violent altercation where he viciously beats a man.

Renton decides that Sick Boy and Begbie can't be trusted, and he takes the money while the others are seemingly asleep. He's about to leave when he notices Spud is still awake, watching him. Spud doesn't alert the others though, and allows Renton to escape.