Do you earn interest on your bank balance at the end of each wave? I know I get some amount of money after completing each wave, but I'm not sure if it's a fixed amount or variable, whether or not it increases as the game progresses or if it's tied to clearing a wave without letting any bloons through.

  • 1
    I removed the ios tag because it's not needed; platform tags are only used when the game mechanics differs from platform to platform. I don't believe this is true for this one.
    – Frank
    Oct 17, 2014 at 20:14
  • @Frank Thanks. I believe it's ChaseC's answer that was so far off from what I was expecting that threw me. Oct 17, 2014 at 20:46
  • @FreeAsInBeer Do you mean the money in the bank tower or your own money? Oct 20, 2014 at 4:52
  • @EpicGuy I mean the balance of all your money available to spend, at the end of each level. Not the money stored inside the Monkey Bank. When I asked this question, I didn't have the Monkey Bank unlocked yet. I wasn't even aware of it's existence. Oct 20, 2014 at 12:26

2 Answers 2


In BTD5 you get $99 plus the number of the round, e.g. 100 for round 1, 101 for round 2 ...

If you want interest in your money, look at the 2nd upgrade path of Banana Farms

Monkey Bank: $3570/$4200/$4535

The Monkey Bank will no longer drop bananas, but instead generates money throughout the round, which is placed in your "bank account," separate from that of other Monkey Banks. Creates 450 money per round plus 10% interest. You may withdraw this fund at any time, and the bank will hold up to $5000. This will also lock the purchase of Banana Republic or Banana Research Facility for this tower, however. Purchasing More Bananas/Banana Plantation will make the bank generate slightly more money (+ $40/$180 per round).

Banana Investments Advisory: $4675/$5500/$5940

Increased money generated to 1000 per round, increases interest to 20%, and increases the maximum held at a time to $20000 per round. Purchasing More Bananas/Banana Plantation will make the bank generate slightly more money (+ $40/$180 per round). This upgrade is unlocked at rank 36.


You earn 99 dollars + what round you are on at the end of each level. SOURCE

So at the end of level 1, you'd earn 100 dollars. At the end of level 2, you'd earn 101 dollars.

  • Do you have a source for this? Oct 17, 2014 at 17:55
  • @FreeAsInBeer Yeah I updated my answer to be more informative. I've been playing bloons since the first one came out. It's just knowledge that I knew from playing. I sources the wiki for you if you want to check it out.
    – FoxMcCloud
    Oct 17, 2014 at 18:41
  • Your link points to the wiki for the Banana Farm, but I'm asking about interest accruing at the end of a round even if you don't have any Banana Farms. I'm referring to the iOS version if that helps. I originally tagged my question as such, but Frank so helpfully removed it. Oct 17, 2014 at 20:07
  • I've just confirmed that this answer is incorrect. 100 gold is given to the player at the end of every completed wave, and there is no additional interest unless a Monkey Bank exists. Oct 17, 2014 at 20:45
  • @FreeAsInBeer The first line of the question, where it mentions "bank balance", is probably throwing people off. A quick read certainly sounds like you're asking about Monkey Banks, which work as ChaseC described; you're actually asking about general unspent money, which doesn't award interest. Oct 17, 2014 at 21:54

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