Amsterdam has a great system of night buses. From 00.30 on the night buses depart at places where the people are, like Leidseplein and Central Station. They cover a large part of Amsterdam and its surroundings. They run about every 30 minutes until around 6.00 a.m., when the usual public transport starts again.
Always check the journey planner to find the quickest way home.
Tickets: € 4,50
You can buy your ticket with the bus driver
If you have a day ticket or an IAmsterdam card the nights are included of course