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https://blockchain.info/block-index/143685

The block reward here is 50.04 BTC instead of 50. Why is this so? I notice many blocks have this slight excess.

marked as duplicate by Nate Eldredge, alcio, Pieter Wuille, Community Sep 8 '17 at 10:16

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The coinbase transaction(the transaction that pays miner bitcoins) gets bitcoins from two sources.

  • Block reward: This part goes on declining like 50/25/12.5 and so-on in a pre-defined schedule

  • transaction fees: This part is total sum of all transaction fees of all transactions in the that particular block. This is determined by market conditions.

Miner Income = Block-reward + Transaction fees

  • Ah I see - so the transaction fees are considered newly generated coins? In other words, they are not considered as outputs from the transaction itself? – user1936752 Sep 7 '17 at 9:51
  • Yes, that is correct. There are no special outputs for fees. Fees is the inplicit difference between sum of inputs and outputs. – sanket1729 Sep 8 '17 at 4:48
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Transaction fees are not counted as newly generated coin. Here new is 50 but 04 is your total transaction fees. As a total reward it is 50.04 but newly generated only 50.

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