<p>Every 210000 blocks, the reward for mining that block halves. It started out at 50BTC and now it's at 25BTC. Eventually it'll get to zero and no more bitcoins will be made.</p>

CC BY-SA 3.0
2013-04-03T21:44:06.173Z
Do you have a reference?
Randomblue
CC BY-SA 3.0
2013-04-03T21:45:19.603Z
Bitcoin source code: https://github.com/bitcoin/bitcoin/blob/master/src/main.cpp#L1053
lurf jurv
CC BY-SA 3.0
2013-04-04T05:43:25.473Z
Question: if the miners decide together that they will ignore this and just add more bitcoins and accept those blocks, will they go away with that?
Karel Bílek
CC BY-SA 3.0
2013-04-04T14:16:21.197Z
@KarelBílek No, the miners wouldn't get away with that, because the rest of the nodes would reject such blocks as invalid. For the miners to succeed at this they would have to convince everyone else in the network to accept their blocks. See this: http://bitcoin.stackexchange.com/questions/8776/could-there-be-hyperinflation-in-bitcoin
Manish
CC BY-SA 3.0
2013-04-03T21:42:51.373Z
2013-04-03T21:42:51.373Z
lurf jurv
<p>Reading <a href="http://bitcoin.org/bitcoin.pdf" rel="nofollow noreferrer">the original Nakamoto paper</a>, I cannot see any discussion or reference to the <a href="https://bitcoin.stackexchange.com/questions/161/how-many-bitcoins-will-there-eventually-be">upper bound on the number of bitcoins</a>.</p>

<p>Where is it specified that at most 21 million bitcoins will be minted?</p>

<reward-schedule>
Where is the number of Bitcoins limit specified?
Randomblue
# Where is the number of Bitcoins limit specified?

(Asked by: username_0 on 2013-04-03)

Reading [the original Nakamoto paper](http://bitcoin.org/bitcoin.pdf), I cannot see any discussion or reference to the [upper bound on the number of bitcoins](https://bitcoin.stackexchange.com/questions/161/how-many-bitcoins-will-there-eventually-be).

Where is it specified that at most 21 million bitcoins will be minted?

**Tags:** reward-schedule


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## 1 answers

### Answer by username_1 on 2013-04-03. Score: 3 | Accepted answer

Every 210000 blocks, the reward for mining that block halves. It started out at 50BTC and now it's at 25BTC. Eventually it'll get to zero and no more bitcoins will be made.

> **Comments:**
> **username_0**: Do you have a reference?  
> **username_1**: Bitcoin source code: https://github.com/bitcoin/bitcoin/blob/master/src/main.cpp#L1053  
> **username_2**: Question: if the miners decide together that they will ignore this and just add more bitcoins and accept those blocks, will they go away with that?  
> **username_3**: @KarelBílek No, the miners wouldn't get away with that, because the rest of the nodes would reject such blocks as invalid. For the miners to succeed at this they would have to convince everyone else in the network to accept their blocks. See this: http://bitcoin.stackexchange.com/questions/8776/could-there-be-hyperinflation-in-bitcoin  

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