Bittensor Introduces eTAO, Letting Subnets Allocate Up to 62% of Emissions to Miners
The Openτensor Foundation has introduced eTAO, a system that gives Bittensor subnet owners greater control over how their subnet’s alpha emissions are distributed among miners, validators and owners. Announced on October 20, 2026, the change replaces a fixed reward allocation with a configurable model designed to accommodate the different needs of individual subnets.
Previously, subnets followed a standard allocation of 18% for owners, 41% for validators and their stakers, and 41% for miners. While consistent, the arrangement limited subnet owners’ ability to adjust incentives for networks with different operational priorities.
eTAO Replaces Bittensor’s Fixed Emissions Split
Under the new system, subnet owners can set their own percentages within protocol-defined boundaries. Owners can receive between 0% and 33%, although lease-created subnets must allocate at least 18% to the owner. Validators can receive up to 50%, subject to a variable minimum designed to protect Root participants, while miners must receive at least 33% of emissions.
Changes are restricted to roughly once every seven days, preventing owners from constantly adjusting the distribution. This gives subnet operators room to experiment with incentives while introducing a limit on how frequently the economic structure can change.
One example provided by the foundation illustrates the potential flexibility: a subnet owner could retain 18% of emissions, allocate 20% to validators and direct 62% to miners. Compared with the former 41% miner allocation, that configuration would substantially increase the rewards available to miners contributing work to the subnet.
The change could be relevant to subnet owners competing to attract and retain contributors. A network that depends heavily on miner participation may prefer a larger miner allocation, while another subnet may prioritize validator incentives or its own operating requirements. The new rules allow these choices without requiring every subnet to use the same percentages.
However, a larger reward share does not automatically guarantee better performance. Subnet owners will still need to assess whether their allocation encourages useful contributions, maintains validator participation and supports the long-term sustainability of their network.
Root TAO Stakers Retain Emission Protection
A key complication is the relationship between subnet validator rewards and Root TAO stakers. Root stakers receive a portion of each subnet’s validator emissions, meaning that reducing the validator allocation could otherwise reduce the rewards flowing to them.
According to the foundation, eTAO addresses this issue by automatically adjusting a subnet’s effective TAO weight when its owner changes the emissions split. The adjustment is intended to preserve the Root stakers’ share as if the default allocation remained in place.
The foundation’s example shows how this works. If a subnet reduces the validator share from 41% to 20%, its effective TAO weight can rise from 18% to 43.9%. Under that configuration, Root stakers would continue receiving approximately 5.4% of the subnet’s emissions, according to the announcement.
This mechanism separates a subnet’s internal reward preferences from the allocation used to calculate Root stakers’ emissions. It is designed to give subnet owners flexibility without making Root participants directly bear the reduction in validator rewards.
For the Bittensor ecosystem, eTAO introduces a more adaptable approach to subnet economics. Its practical impact will depend on how owners use the new controls, whether revised incentives attract productive contributors and how the changes affect participation across the network. The system expands the available options, but subnet performance will ultimately depend on the quality of the work being rewarded.
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