Tokens () are the currency in Bloons TD 5 Mobile and Steam used to purchase and upgrade the Monkey Lab. The player can obtain Tokens by completing tracks including Extreme Tracks or reaching round 101 on a track. The player does not receive tokens for beating the same track on the same difficulty for a second time. The amount of tokens you can earn in a level depends on the track played and the difficulty played on. It is also possible to receive tokens from Odysseys and Boss Bloon events.
Although the player does not receive tokens for beating the same level on the same difficulty twice, he/she does receive a token if they beat round 101 on a level on the same difficulty twice. This is useful for getting small amounts of tokens without playing new levels.