Stablecoin Yields Explained: Where the Interest Comes From

Holding a stablecoin is not, by itself, an interest-bearing activity. A token like USDC or USDT is a claim on a dollar; owning one in a wallet earns nothing. Yet a large market has grown up around earning on stablecoins, with advertised rates ranging from a few percent to double digits. Understanding where that money actually comes from is the difference between collecting a sustainable return and standing in front of a risk that is not being disclosed.

This article walks through each real source of stablecoin yield, explains why rates rise and fall, and covers the regulatory shift in the United States that has reshaped who is allowed to pay you. It is educational and is not financial advice; yields and the risks attached to them change constantly, and you should verify any current figure before acting on it.

The foundation: interest on reserves

A fully reserved, fiat-backed stablecoin is supposed to hold one dollar of safe, liquid assets for every token in circulation. In practice, issuers hold those reserves largely in short-dated US Treasury bills, overnight reverse-repurchase agreements, and cash at banks. Those assets pay interest, and when policy rates are high, the sums are enormous.

Tether, the issuer of USDT, reported more than $10 billion in net profit for 2025 in its BDO attestation, a figure its own executives said came primarily from interest income on a rapidly expanding portfolio of US Treasury bills, according to The Block. Circle, the issuer of USDC, reported full-year 2025 revenue and reserve income of about $2.7 billion, with a reserve return rate of roughly 3.8% in the fourth quarter on more than $75 billion of USDC in circulation, per The Block’s summary of Circle’s results.

The crucial point for a holder is that, historically, that interest has gone to the issuer, not to you. When you hold USDC or USDT directly, the company keeps the spread. This is the single most important fact about stablecoin economics: the “float” is the business model. Any yield you see advertised is therefore someone choosing to pass part of that interest back to you, or a return generated somewhere else entirely.

Tokenized Treasury bills: passing the yield through

The most direct way the reserve yield reaches investors is through tokenized money-market and Treasury-bill funds. Here, instead of a stablecoin whose issuer keeps the interest, a regulated fund issues a token that represents a share in a portfolio of short-term government debt, and the T-bill yield flows to the token holder.

These products have grown quickly. One industry analysis estimates tokenized Treasury products expanded from under $200 million in early 2024 to more than $15 billion by mid-2026, with yields typically in the low-to-mid 4% range before fees, tracking the underlying bills, according to Spark’s research on tokenized Treasuries. Because the US Treasury-bill rate effectively sets a floor, a tokenized T-bill product is often described as crypto’s “risk-free rate”: a benchmark against which riskier yields should be measured.

The trade-off is access. Most tokenized Treasury products impose know-your-customer checks, minimums, and transfer restrictions, so they behave more like a regulated fund than like a bearer token. They are also distinct from payment stablecoins in the eyes of regulators, a distinction that matters a great deal in the United States, as explained below.

DeFi lending and liquidity provision

The second major source is decentralized finance. On lending protocols such as Aave and Compound, you deposit stablecoins into a shared pool and borrowers pay to draw from it. The interest borrowers pay, minus a protocol reserve, becomes your supply yield.

These rates are purely a function of supply and demand for borrowing, expressed through pool “utilization.” When few people want to borrow, supply yields can compress below 2%; when leverage demand spikes, they can briefly exceed 10%. Industry trackers commonly cite typical USDC, USDT, and DAI supply rates in a 4–6% band, but the figure moves continuously, and any snapshot is stale within days. For a live number you should consult a yield aggregator such as DefiLlama, or the protocol’s own interface, rather than a static article.

A related source is liquidity provision on decentralized exchanges. By depositing a pair of assets, say two different stablecoins, into an automated-market-maker pool, you earn a share of trading fees. For a stablecoin-only pair the price risk is small, but it is not zero: a depeg in one of the two coins can leave you holding more of the weaker asset.

DeFi yield is “real” in the sense that it reflects genuine demand to borrow or trade. But it carries risks that a bank deposit does not: smart-contract bugs, oracle failures, and bridge exploits. These are not hypothetical. An exploit in April 2026 drained hundreds of millions of dollars through a cross-chain bridge vulnerability and triggered a wave of withdrawals across lending markets, a reminder that composable systems can transmit a failure in one protocol to many others, as documented in Spark’s research.

CeFi lending and “earn” products

Centralized platforms, exchanges and lenders, also offer stablecoin yield. In the simplest version, an exchange pays you a reward on the USDC you keep on its platform, funded by the interest the exchange earns on the underlying reserves it holds with the issuer. In more aggressive versions, a lender takes your deposit and lends it to trading firms or deploys it into DeFi, then pays you a share.

The 2022 failures of centralized lenders such as Celsius and Voyager are the cautionary history here: when a platform takes custody of your coins and lends them onward, you are exposed to that platform’s solvency and to whatever it did with your deposit, not merely to a dollar. The yield may be real, but so is the counterparty risk, and in a bankruptcy a depositor is typically an unsecured creditor.

Synthetic dollars and the basis trade

At the higher-risk end sit “synthetic” dollar tokens, of which Ethena’s sUSDe is the best-known example. These do not simply hold Treasury bills. Instead they run a basis trade: holding a crypto asset while shorting its perpetual futures to stay delta-neutral, and collecting the funding payments that long traders pay to shorts. When markets are bullish and funding is positive, the yield can be high, double digits in good periods, according to Spark’s analysis of synthetic yield.

The catch is that the yield is not anchored to anything as stable as a government bond. Funding rates can turn negative, collateral can gap, and the strategy depends on derivatives venues functioning in stress. A headline APY in the teens should be read as compensation for taking funding-rate and execution risk, not as a free upgrade over a 4% Treasury product.

Real yield versus incentive yield

The most important distinction in the entire category is between real yield and incentive (emissions) yield. Real yield is paid out of genuine economic activity: interest a borrower actually pays, fees a trader actually pays, funding a long actually pays. Incentive yield is paid by printing and handing out a protocol’s own governance token to attract deposits. It can look identical on a dashboard, but one is a cash flow and the other is a subsidy.

The definitive lesson came from Terra’s UST in May 2022. Its Anchor Protocol advertised a near-fixed 19.5% yield on UST deposits, a rate that a Harvard Law analysis found was heavily subsidized, costing roughly $6 million a day by April 2022, which is why the community began voting to lower it, per the Harvard analysis of the Terra collapse. The unsustainable rate pulled in enormous speculative deposits; when confidence cracked, the algorithmic peg entered a death spiral and tens of billions of dollars of value evaporated within days. The rule of thumb that survived: a stablecoin yield far above the Treasury-bill rate, with no clear explanation of who is paying it, is usually being subsidized, and subsidies end.

Why stablecoin yields rise and fall

Because the base layer of stablecoin yield is Treasury-bill interest, the whole stack moves with the Federal Reserve’s policy rate. When the Fed raised rates sharply in 2022–2023, reserve income exploded and issuers became highly profitable; tokenized T-bill yields followed rates up. When the Fed cuts, that floor falls, and every yield built on top of it, from DeFi lending benchmarks to “safe” earn products, tends to drift lower with it.

Layered on top of that macro floor are crypto-native cycles: borrowing demand, leverage appetite, and funding rates that swing with market sentiment. A simple mental model is: Treasury-bill rate sets the baseline, and everything above it is a risk premium for the specific strategy you are using.

The regulatory shift: the GENIUS Act

In the United States, the rules on who may pay stablecoin yield changed materially in 2025. The GENIUS Act, the federal framework for payment stablecoins signed into law in July 2025, prohibits permitted payment-stablecoin issuers from paying holders “any form of interest or yield” simply for holding the coin, under Section 4(a)(11) of the statute, as summarized by Perkins Coie and by the Congressional Research Service’s report on the stablecoin yield debate.

The prohibition is on the issuer. It does not, on its face, stop a third party such as an exchange from paying rewards on stablecoin balances, which is why platforms like Coinbase have continued to offer USDC rewards, arguing they are not the issuer and are paying “rewards,” not interest, per Decrypt. Regulators have moved to narrow that gap: the Office of the Comptroller of the Currency proposed a rule creating a rebuttable presumption that an issuer is violating the ban if it arranges for an affiliate or related party to pay yield on its behalf, with a comment period that ran into 2026. The practical effect for US users is that direct, issuer-paid stablecoin interest is off the table, while third-party rewards and separately structured yield products occupy a contested middle ground whose treatment may still change. Rules outside the US differ, so the answer depends on your jurisdiction.

Putting it together

Stablecoin yield is not magic and it is not uniform. At the bottom sits the Treasury-bill rate, captured by issuers directly and passed through by tokenized Treasury products. Above it, DeFi lending and liquidity provision pay for genuine borrowing and trading demand, at the cost of smart-contract and counterparty risk. Higher still, synthetic dollars pay funding-rate yield that can vanish. And at the dangerous fringe, incentive yield masquerades as income until the subsidy runs out.

The single most useful habit is to ask, for any advertised rate: who is paying this, out of what cash flow, and what happens if that cash flow stops? If there is no clear answer, the yield is not free; it is a risk you have not yet identified. None of the above is a recommendation to buy, hold, or earn on any particular asset.

Frequently asked questions

Do I earn interest just by holding a stablecoin?

No. Holding USDC or USDT in a wallet earns nothing by itself; historically the issuer keeps the interest on the reserves. To earn, you have to lend, provide liquidity, use a yield product, or hold a token specifically designed to pass yield through.

Why are some stablecoin yields so much higher than a bank savings rate?

Because they carry risks a bank deposit does not, such as smart-contract failure, counterparty insolvency, funding-rate reversals, or, in the worst cases, a subsidy that is not sustainable. A rate far above the Treasury-bill level is compensation for a specific risk, even if that risk is not spelled out.

Is stablecoin yield safe?

It ranges from relatively low-risk (a regulated tokenized Treasury fund) to extremely high-risk (unsustainable incentive yield like Terra’s Anchor). “Safe” is never absolute here; even conservative products carry issuer, reserve, and smart-contract risk. This article is educational and not financial advice.

Why do stablecoin yields change so often?

The base layer tracks the Federal Reserve’s policy rate through Treasury-bill interest, and the layers above it move with crypto borrowing demand, leverage, and derivatives funding. All of these shift continuously, so any quoted rate can be stale within days.

Can a US stablecoin issuer pay me interest directly?

Under the GENIUS Act signed in July 2025, a permitted payment-stablecoin issuer is prohibited from paying holders interest or yield for simply holding the coin. Third parties such as exchanges have continued to offer “rewards,” a structure regulators have been working to constrain, so the picture may keep evolving and differs by country.

What is the difference between “real yield” and “emissions yield”?

Real yield is paid from actual economic activity, such as interest a borrower pays or fees a trader pays. Emissions yield is paid by distributing a protocol’s own newly issued token to attract deposits. Real yield can persist; emissions yield tends to fall as the subsidy shrinks or ends.