sBTC Staking Explained: How to Earn Stacks Bitcoin Rewards on Bitcoin

Every way to earn on Bitcoin has asked you for the same thing first. Wrap it into something else. Bridge it somewhere else. Or send it to a company that pays you interest right up until the week it stops.

Bitcoin staking on Stacks does not work that way, and the reason is worth understanding. The Bitcoin paying you was never yours. It belongs to miners, and they were spending it either way.

The yield was already being paid. It went somewhere else.

Stacks runs on Proof of Transfer. Miners who want to produce a Stacks block do not burn electricity to compete for it. They spend Bitcoin. Roughly every ten minutes, miners commit BTC for the right to mine, and that Bitcoin goes to the people securing the network.

This has been running since January 2021. Nobody is funding it out of a treasury and nobody has to keep choosing to fund it. As long as there is competition to mine Stacks blocks, Bitcoin flows to participants. sBTC alone held $437 million in deposits at Q1 2026 close.

The PoX-5 upgrade changed who receives it. Before, you needed STX. Now Bitcoin can be committed directly, and the rewards accrue to the Bitcoin side of the position.

sBTC is Bitcoin on Stacks, and it is a tradeoff

sBTC is Bitcoin on the Stacks layer, backed one to one and redeemable for BTC.

This audience has been lied to before by people rounding off. sBTC is not native Bitcoin sitting on the Bitcoin blockchain. It is a representation, and a signer set holds the underlying BTC and processes deposits and withdrawals. That is a trust assumption. It is a different one from a lending desk and a smaller one than a custodial exchange, but it is not zero, and anyone who tells you it is zero is selling something.

What you get for it is speed and composability. sBTC settles at Stacks speed, works inside Stacks contracts, and a stake is one transaction instead of a sequence across two chains.

Native Bitcoin staking, where BTC locks directly on L1 under your own keys, is a separate path with a different set of tradeoffs. It is coming later.

The STX pairing is not collateral, and under-pairing costs you

A position is sBTC plus STX worth roughly five percent of it. You deposit both into the pool contract in a single transaction.

The STX is not collateral and it is not a fee. It establishes eligibility and links the position to a Stacks identity so the protocol can compute what you are owed. It earns nothing itself. All of the yield accrues to the sBTC.

The exact ratio is published per bond. Today it is fixed at five percent. If your STX falls below the ratio on a rollover and you do not top it up, you do not get kicked out. You receive fewer rewards than your sBTC would otherwise earn. The position keeps working, it just works at a discount.

Most Bitcoin holders do not hold STX. You can acquire exactly the shortfall inside the staking flow rather than going to an exchange first.

Rewards land every two weeks in sBTC

Distributions accrue roughly every two weeks, once per reward cycle. They arrive in sBTC, distributed directly to your reward address. There is no claim step and no option to receive them in BTC.

Why sBTC and not BTC? Bitcoin transaction fees are fixed regardless of how much you are moving. On a small position, a reward distribution can be close to dust, and the fee to deliver it on L1 eats a real share of what you earned. Rewards in sBTC are cheaper to distribute, so more of what you earned actually reaches you. You can convert sBTC to Bitcoin whenever you want, at whatever fee you choose to pay, in a single transaction rather than twenty-six.

The protocol targets around three percent APY. What you earn depends on how much Bitcoin miners commit and how much capital is staked next to you. There is no slashing, so principal is not put at risk by protocol behaviour. Only the yield moves.

For comparison: Babylon holds 56,853 BTC in its staking contracts but pays rewards in BABY tokens, not Bitcoin. CoreDAO pays in CORE. The Stacks model is the only one where the yield is denominated in the same underlying asset you deposited. That distinction matters if the reason you are staking is that you do not want to sell your Bitcoin.

You can leave early. Your STX cannot.

The bond term is six months, but exit works differently depending on when you leave.

Before the pool registers its bond, you can withdraw everything: sBTC and STX, full exit, no penalty. Once the bond starts, only your sBTC is withdrawable. Your STX stays locked until the bond ends. You do not get it back early. Rewards you already earned are always yours, and withdrawn sBTC simply stops earning from that point.

What this means in practice: if your position is mostly sBTC, the STX lock is a minor nuisance. If STX moves against you while it is locked, the five percent exposure you signed up for becomes a position you cannot close. That is a real cost, and it scales with time and volatility.

Deposits are not open at all times. The pool opens when Xverse binds to an upcoming bond period and closes shortly before it starts. The pool also has limited capacity per period, so it can close early if it fills. Outside that window, deposits are not accepted.

Each user gets one position per bond. You can top up your sBTC or STX before the bond starts, but once it is running, the position is fixed until you withdraw or the bond matures. If you want a second position, you wait for the next bond.

At the end of six months, rollover is available but it is not automatic. You take an explicit action to move your position into the next bond in the same lane. If you do nothing, your deposit unlocks and you withdraw. New bonds open roughly monthly, and six run concurrently, so the lane your position sits in comes around again every six months.

What is still early

sBTC carries a peg assumption. The signer set is a dependency. If that is a dependency you will not take, wait for the native L1 path.

You can exit your sBTC early, but your STX is locked for the full bond term. If STX drops during that window, you eat the loss on a position you cannot close. That five percent pairing matters more when the exit is one-sided.

Total return is the sBTC yield minus the STX price move times five percent. The whitepaper does not hide this and neither should anyone describing it.

The contracts are new. Proof of Transfer has five years of production history. The staking contracts built on top of it have weeks. Early contracts break in ways nobody predicted. That is the honest case for waiting.

Those four things are the price of entry. A product that buries them is telling you something about itself.

Where this sits right now

The deposit window for the Genesis Bond opens around 1 September 2026. The bond itself starts at Bitcoin block 966,350, roughly 10 September, during Stacks reward cycle 143. The window closes when Xverse registers the pool near the deadline.

After that, new bonds open roughly monthly with up to six active at once. Missing one costs you a month, not access. But once you are in, your STX is locked for the full six months even if you withdraw your sBTC early.

Where Xverse fits

Xverse is a self-custodial Bitcoin neobank. You hold Bitcoin, earn on it, borrow against it, swap, and soon spend it with the Card, from one account across Bitcoin L1, Stacks, Starknet and Spark.

Bitcoin staking sits inside Earn next to everything else, which means the STX pairing is acquirable in the same flow and the position shows up in the same portfolio as the rest of your Bitcoin. Xverse also runs the largest STX stacking pool on Stacks. More STX is staked through Xverse than through any other pool, which anyone can verify onchain. That is five years of running this specific protocol, not a claim about the future.

Download Xverse

The first yield denominated in Bitcoin

Bitcoin has spent fifteen years as the only major asset with no native way to earn, and every product built to fix that solved it by making you stop holding Bitcoin.

Earning sBTC, backed one to one by Bitcoin, out of Bitcoin that was already changing hands between miners, is the first version of this that keeps you denominated in the asset you came for. It is early and the tradeoffs are real. The deposit windows are narrow, the contracts are new, and early exit still costs you your STX. But the mechanism is public, it has been running for five years, and anyone can check it.

‍