Table of Contents
Key takeaways
- TAO has a fixed cap of 21 million tokens, with no pre-mine and no venture allocation, the same hard limit Bitcoin uses.
- New TAO is created about every 12 seconds at one token per block, which works out to roughly 7,200 TAO per day before the first halving.
- The first halving arrived in December 2025 once total issuance crossed 10.5 million TAO, and it cut the block reward to 0.5 TAO and daily issuance to about 3,600.
- Halvings trigger on supply milestones rather than the calendar, so recycled registration fees can push each event later than a strict four-year clock would imply.
- Every subnet under Dynamic TAO carries its own alpha token with its own 21 million cap and halving, and that layer sits on top of the base TAO schedule.
The 21 Million Cap
TAO has a fixed limit of 21 million tokens. Each TAO divides into a billion smaller units called rao, which is the denomination the network uses internally, similar to how a bitcoin divides into 100 million satoshis.
The launch of TAO was a fair one since there was no pre-mine and no venture allocation set aside before the network went live. Every TAO in existence was issued through emissions to the people doing work on the network, and issuance continues at a predictable, declining rate until the full 21 million has been created.
How TAO is Emitted
The Bittensor blockchain produces a block about every 12 seconds, and each block creates a set amount of new TAO. Before the first halving that amount was one TAO per block, which adds up to a maximum of roughly 7,200 TAO per day when blocks arrive on schedule.
Those emissions do not go to a single pool. Within each subnet, the newly created TAO and the subnet's alpha rewards are split along a fixed ratio, with 41% going to miners, 41% to validators and their stakers, and 18% to the subnet owner. As of November 2025 the network also moved to a flow-based model that decides how much of the total emission each subnet receives based on net TAO staking flows rather than token prices, so the strongest subnets pull a larger share of the daily issuance.
How the Halving Schedule Works
This is where TAO parts ways with Bitcoin tokenomics. Bitcoin halves its block reward every 210,000 blocks, which lands close to every four years on the calendar. Bittensor instead halves when cumulative issuance reaches preset supply milestones, so the schedule follows the amount of TAO created rather than the passage of time.
The first milestone sat at 10.5 million TAO, exactly half the cap, and crossing it cut the block reward in half. Each later halving triggers at the midpoint of the supply that remains, so the thresholds climb toward 21 million while the new issuance per block keeps falling by half.
One detail does make the timing of the halvings not 100% exact. Subnet registration fees are recycled back into the emission pool rather than burned, and that recycling returns TAO to the system and slows the march toward the next threshold.
The Halving Timeline
The first halving occurred in December 2025, when issuance reached the 10.5 million mark and daily emissions fell from about 7,200 TAO to about 3,600. The table below lays out the schedule, with the dates beyond the first event being projections rather than fixed points.
| Era | Supply milestone | Block reward | Daily emission | Approx. date |
|---|---|---|---|---|
| Genesis | 0 to 10.5M | 1.00 TAO | About 7,200 | 2021 to 2025 |
| 1st halving | 10.5M | 0.50 TAO | About 3,600 | December 2025 |
| 2nd halving | 15.75M | 0.25 TAO | About 1,800 | Around 2029 |
| 3rd halving | 18.375M | 0.125 TAO | About 900 | Around 2033 |
The second halving will trigger once issuance reaches 15.75 million TAO, dropping the block reward to 0.25 TAO and daily issuance to roughly 1,800, with current projections placing it around late 2029. From there the pattern continues, halving after halving, until the reward becomes negligible and the final TAO is issued near the year 2140, which is the same long tail Bitcoin follows.
Where Supply Stands Today
The first threshold of 10.5 million TAO was crossed in December 2025, so more than half of the eventual supply has already been issued. Market trackers place circulating supply above 10 million TAO, a little past the halfway point of the cap, though a meaningful portion of that supply is staked into validators and subnets rather than sitting liquid on exchanges. The supply takeaway is straightforward, since the network is past its highest-issuance era and every future halving makes new TAO scarcer relative to what already exists.
The Alpha-Token Layer
The Dynamic TAO layer offers a similar level of tokenomics compared to the base layer. Each subnet has its own alpha token, and each alpha token carries its own 21 million cap and its own halving that mirrors the TAO design. When someone stakes TAO into a subnet they receive that subnet's alpha, and the rewards earned inside that subnet accrue in alpha rather than in TAO.
That means a participant staking into subnets is exposed to two issuance schedules at once, the base TAO emission and the alpha emission of whatever subnets they hold. The base layer is uniform and predictable across the whole network, while each alpha token has its own supply curve, its own demand, and its own market behavior. Anyone modeling TAO scarcity has to keep that second layer in view rather than stopping at the 21 million headline.
Why the Schedule Matters
A fixed cap with a declining issuance rate gives TAO a supply side that can be modeled years in advance. The amount of TAO entering the market each day is known, the halvings are programmed, and the only real variable in the timing is how much TAO gets recycled along the way. Fixing the supply issuance to a relatively set schedule helps holders and economy players plan for the future in a way that lets the ecosystem develop appropriately.
