Bitcoin fees supplied 12% of miner revenue as hash rate retreated

Bitcoin’s first post-halving weekend exposed the immediate economic adjustment facing its miners. Coin Metrics’ UTC daily series records 126 blocks, 787.5 BTC of new issuance and 107.92182736 BTC in transaction fees on May 16, 2020. Fees therefore represented approximately 12.1% of the 895.42182736 BTC in combined subsidy-and-fee revenue calculated for that daily window.

The percentage is Coinburn’s calculation: 107.92182736 divided by the sum of 107.92182736 and 787.5. It describes aggregate protocol revenue before electricity, equipment, financing, pool charges, hedges or other operating costs. It does not establish any individual miner’s profitability.

The subsidy shock reached the mining market

Bitcoin block 630,000 was mined on May 11, 2020, activating the protocol’s third subsidy halving. The block record shows that the subsidy fell from 12.5 BTC to 6.25 BTC. Blockchain.com’s explorer attributes the block to AntPool and records 0.90968084 BTC in transaction fees, producing a total block reward of 7.15968084 BTC.

By May 16, the lower subsidy applied across a complete UTC day. Coin Metrics counted 126 blocks, so the recorded 787.5 BTC issuance equals 126 multiplied by 6.25 BTC. At 126 blocks per day, the implied average interval was about 11 minutes and 26 seconds, slower than Bitcoin’s ten-minute target but well within the variation possible over a single day.

Coin Metrics estimated May 16 hash rate at approximately 100.87 exahashes per second, compared with approximately 136.10 exahashes per second on May 10. That is a calculated decline of about 25.9% between the two daily estimates. Hash rate is inferred from observed block production and difficulty rather than directly measured, however, and short comparison windows can amplify statistical noise. The figures support evidence of contraction, not a precise count of machines that were disconnected.

Fees softened, but did not replace, lost issuance

The 107.92 BTC in May 16 fees was economically meaningful because miners had just lost half of the scheduled subsidy per block. Using Coin Metrics’ May 16 PriceUSD observation of $9,395.48 only as a conversion reference, the recorded fees were worth approximately $1.01 million. That dollar figure is a calculation, not proof that miners sold their fees at that price.

Fees still supplied only about one-eighth of combined native-unit revenue. The May 16 record therefore did not demonstrate that Bitcoin had reached a fee-funded security model. It showed a narrower development: demand for block space was providing a larger cushion while the network absorbed a predetermined issuance cut.

The market itself remained comparatively orderly. Kraken’s venue-specific report for May 16 listed BTC at $9,345, down 0.22%, with $164 million traded in its BTC markets. Kraken reported $214 million across all of its markets. Those figures describe one exchange and its reporting window; they are not consolidated global volume or an official Bitcoin close.

What could be known on May 16

The verified May 16 evidence showed reduced issuance, elevated fee contribution and a lower estimated hash rate without a corresponding market collapse. It could not establish whether the hash-rate decline would persist, how the next difficulty adjustment would resolve, or whether transaction fees would remain elevated.

Later context

On May 22, 2020, Glassnode reported that hash rate had fallen by more than 20% over two weeks and that fees were supplying more than 15% of miner revenue at that later measurement point. That retrospective confirmation is useful context, but it does not replace the May 16 daily observations or their methodological limits.