Money

"Remember to spend your money"

- Round 5 on Bloons Tower Defense 1

"Building up a bit of a nest egg are we? Think carefully about what to spend it on - Money tends to get a bit tighter the higher you go in this game. Just sayin'."

- Round 47 on Bloons Tower Defense 5

"Spend your money wisely. You get less after round 50, and even less after 60."

- Round 48 in BTD4

Money, also known as Cash, is the main currency in the Bloons Tower Defense series. You use money to buy towers, upgrades, and other special items. In Bloons TD 4 and Bloons TD 5, the player can buy a Premium Upgrade called Double Cash Mode, which gives the player twice the money for each bloon popped and also starts the player out with twice the regular amount. You can't get money in Deflation Mode. It is unconfirmed that Money has a "maximum limit", as the maximum limit could be somewhere beyond 1,500,000+, if the player has that amount of money, money could only be obtained via Abilities (such as Supply Drop Ability), and not from pops.

How to get
There are three ways you can get money:
 * One way is by popping bloons:

! align="left" |Type ! align="center"| BTD3 ! align="center"|  BTD4 ! align="center"|  BTD5
 * Red Bloons
 * align="center" | 1
 * align="center" | 1
 * align="center" | 1
 * Blue Bloons
 * align="center" | 2
 * align="center" | 2
 * align="center" | 2
 * Green Bloons
 * align="center" | 3
 * align="center" | 3
 * align="center" | 3
 * Yellow Bloons
 * align="center" | 4
 * align="center" | 4
 * align="center" | 4
 * Pink Bloons
 * align="center" | -
 * align="center" | 5
 * align="center" | 5
 * Black Bloons
 * align="center" | 9
 * align="center" | 11
 * align="center" | 11
 * White Bloons
 * align="center" | 9
 * align="center" | 11
 * align="center" | 11
 * Camo Bloons
 * align="center" | -
 * align="center" | 11
 * align="center" | -
 * Lead Bloons
 * align="center" | 19
 * align="center" | 23
 * align="center" | 23
 * Zebra Bloons
 * align="center" | -
 * align="center" | 23
 * align="center" | 23
 * Rainbow Bloons
 * align="center" | 37
 * align="center" | 47
 * align="center" | 47
 * Ceramic Bloons
 * align="center" | 73
 * align="center" | 92
 * align="center" | 95
 * M.O.A.B.
 * align="center" | 292
 * align="center" | 302
 * align="center" | 381
 * B.F.B.
 * align="center" | -
 * align="center" | 1525
 * align="center" | 1525
 * Z.O.M.G.
 * align="center" | -
 * align="center" | -
 * align="center" | 6101
 * }
 * The actual yield depends on the round: in BTD5 it is
 * 100% in rounds 1-51
 * 50% in rounds 52-61
 * 20% in rounds 62-85
 * Examples:
 * For the B.F.B. in round 60 you earn only $762.
 * For the M.O.A.B. in round 46 you earn $381, for the 9 M.O.A.B. in round 64 you earn 9 * $381 * 0.2 = $685 (truncated to the next integer).
 * align="center" | 1525
 * align="center" | 1525
 * Z.O.M.G.
 * align="center" | -
 * align="center" | -
 * align="center" | 6101
 * }
 * The actual yield depends on the round: in BTD5 it is
 * 100% in rounds 1-51
 * 50% in rounds 52-61
 * 20% in rounds 62-85
 * Examples:
 * For the B.F.B. in round 60 you earn only $762.
 * For the M.O.A.B. in round 46 you earn $381, for the 9 M.O.A.B. in round 64 you earn 9 * $381 * 0.2 = $685 (truncated to the next integer).
 * Examples:
 * For the B.F.B. in round 60 you earn only $762.
 * For the M.O.A.B. in round 46 you earn $381, for the 9 M.O.A.B. in round 64 you earn 9 * $381 * 0.2 = $685 (truncated to the next integer).


 * Another way is earning Bonus Money by winning rounds:
 * In BTD5 you get 99 plus the number of the round, e.g. 100 for round 1, 101 for round 2 ...
 * You also earn double the in between round cash if you have Double Cash Mode.


 * The third way is by using Banana Farms (BTD4 & BTD5) or Sniper Monkeys with the Supply Drop upgrade (BTD5). Supply drop snipers can be used in a strategy where you have 1-2 Sun temples, 5-7 sun gods, and 50-70 supply drop snipers. This is extremely expensive but will earn the player about 450k per round in rounds 150+/
 * Bloons that get popped by towers within the range of a Monkey Town give you 50% more cash than normal.