Circle, Tether and the PYUSD ecosystem show three different ways to monetize the same $1 promise

A stablecoin company can give a user a token worth $1, charge no visible fee, and still build a highly profitable business. The reason is float: the issuer receives real dollars, owes the holder a redeemable $1 liability, and invests the backing in permitted reserve assets that earn interest. But the simple “issuer keeps the T-bill yield” story breaks down quickly. Circle shares a large portion of USDC economics with distributors such as Coinbase; Tether appears to retain a larger share of reserve economics within a private-company structure, while disclosing less granular partner economics and holding a broader reserve mix; and PYUSD separates the issuer, Paxos, from the distribution brand, PayPal, which currently pays 4% rewards to eligible holders. The economics are therefore determined not just by interest rates, but by who owns distribution, who is allowed to keep reserve earnings, and how much of that income must be recycled into incentives.

The $1 Token Creates a Much Larger Economic Machine

When a customer acquires a fully backed dollar stablecoin, the issuer or its reserve custodian receives dollars or equivalent assets and creates a matching token liability. The token holder generally keeps the right to redeem at or near $1. The reserve assets, however, can earn interest while the token remains outstanding. At scale, that spread between a non-interest-bearing liability and interest-bearing reserves becomes enormous.

This is closer to the economics of float than conventional bank lending. A bank can transform deposits into loans and earn a credit spread. A regulated payment-stablecoin issuer is increasingly constrained to cash, short-dated Treasuries, repo and similarly liquid assets. That usually means less credit risk and less yield than bank lending, but also a radically simpler balance-sheet engine: stablecoin supply multiplied by the prevailing risk-free or near-risk-free rate.

The first variable is therefore not transaction volume. It is token float. DefiLlama’s October 8 snapshot put USDT at about $184.1 billion, USDC at $74.3 billion and PYUSD at roughly $2.9 billion. Circle’s own transparency page reported $74.1 billion of USDC in circulation on October 5, close to the market-data estimate. A one-percentage-point annual yield on those balances is economically worth roughly $1.84 billion, $743 million and $29 million, respectively, before any reserve mix, expenses or revenue-sharing arrangements are considered.

Source: DefiLlama stablecoin market data, Oct. 8, 2026. Circle transparency independently reported $74.1B USDC circulation on Oct. 5.

The Five Ways a Stablecoin Business Can Monetize

Reserve interest is the dominant engine for the largest fiat-backed issuers, but it is not the only one. A stablecoin platform can also charge minting or redemption fees, pass through blockchain fees, sell institutional APIs and treasury services, earn custody or fund-management fees, and use incentives strategically to acquire distribution. The retail interface can therefore be free even while several entities behind it are being paid.

The crucial distinction is between gross reserve income and retained economics. A user can see a zero-fee transfer while the issuer earns reserve income, pays a distributor for the balance, subsidizes gas or rewards, and still retains a margin. Stablecoin competition therefore increasingly looks like deposit gathering without calling the token a deposit: platforms compete to attract idle dollar balances because every additional dollar can expand the reserve base.

Original framework. Reserve allocation and legal rights differ by product and jurisdiction; arrows describe economic flows rather than legal ownership of specific reserve assets.

Circle: A Public View Into the Cost of Distribution

Circle is the cleanest case study because it is publicly listed and discloses both reserve income and what it pays to distribute USDC. In Q2 2026, Circle reported $667.7 million of reserve income and $33.6 million of other revenue, for $701.3 million total revenue and reserve income. Its average USDC in circulation was $76.5 billion and its disclosed reserve return rate was 3.5%.

The arithmetic matches the business model. Annualizing Q2 reserve income gives about $2.67 billion. Dividing by the $76.5 billion average USDC float produces an implied annualized gross reserve-income intensity of about 3.49%, essentially the disclosed 3.5% reserve return rate. The balance sheet is doing exactly what the model predicts: token supply multiplied by a short-duration dollar yield.

But Circle does not keep all of that yield. Distribution and transaction costs were $410.4 million in the quarter. Circle says those costs include payments to distributors, with Coinbase alone accounting for $324.6 million of Q2 distribution costs. Under the collaboration agreement, Coinbase receives economics tied to USDC held on its platform and a share of broader ecosystem reserve income after specified deductions. Binance and other partners can also receive distribution incentives.

Source: Circle Q2 2026 Form 10-Q. RLDC = total revenue and reserve income less distribution, transaction and other costs; shown before operating expenses.

Circle reported a 41% revenue-less-distribution-cost margin in Q2 and a 39% net reserve margin. This creates an important investment implication: USDC growth is not equally valuable regardless of where it happens. If a new $1 billion of USDC sits in a channel that demands a large share of reserve income, the incremental economics to Circle can be much smaller than $1 billion of organically distributed USDC. Stablecoin market share is therefore an incomplete measure of issuer profitability; distribution mix matters.

Circle is also slowly diversifying away from pure rate exposure. Q2 other revenue included subscription and services, transaction revenue and related products. It was still only 4.8% of total revenue and reserve income, however. As of mid-2026, Circle remained overwhelmingly a reserve-income company with an emerging software-and-network layer attached.

Tether: Bigger Float, More Retained Economics – but Less Disclosure

Tether uses the same basic float engine at much larger scale, but its economics are structured differently. At June 30, 2026, Tether International reported $184.59 billion of gross contractual token redemption value and $187.75 billion of reserve assets. The reserve portfolio included $114.96 billion of U.S. Treasury bills, $18.63 billion of overnight Treasury repo and $6.99 billion of term repo. In total, cash equivalents and other short-term deposits were $140.64 billion, or roughly three quarters of total reserve assets.

Tether said Q2 net operating profit was approximately $1.5 billion, led by U.S. Treasury and repo performance. Relative to the $184.6 billion gross token amount at quarter end, that equals 0.81% for the quarter, or about 3.25% on a simple annualized basis. That is not a directly comparable yield figure: Tether’s reserve mix also includes gold, bitcoin, public equities, other investments and secured loans, and the company does not publish a Circle-style quarterly income statement that reconciles every revenue and expense line.

That disclosure difference matters. BDO’s Q2 assurance report provides reasonable assurance over the Financial Figures and Reserves Report at the June 30 point in time. It is not a full audited GAAP or IFRS income statement for the quarter, and BDO explicitly notes that the reserve report is a point-in-time exercise. Tether’s profit announcement therefore provides useful scale, but it cannot be decomposed as precisely as Circle’s SEC filings.

The economics nevertheless look unusually powerful because Tether does not disclose a Circle-sized distribution-sharing burden. Its terms also make the holder’s position clear: holders are not entitled to increases in the value of reserves beyond the token’s face value. Tether can charge 0.1% for acquisition and, for direct redemptions, the greater of $1,000 or 0.1%, with a $100,000 minimum. The fee is small relative to years of reserve yield, but at institutional scale it adds another monetization layer and discourages very small direct redemption activity.

Tether’s reserve buffer was $4.11 billion at June 30, equal to about 2.24% of digital-token liabilities. That cushion belongs to the issuer’s capital structure rather than stablecoin holders as extra upside. In practical terms, a user holding 10,000 USDT still has a $10,000 redemption claim before applicable fees, not a pro-rata claim on gold appreciation, bitcoin gains or retained earnings.

PYUSD: The Yield Is Split Across Paxos and PayPal

PYUSD is the most revealing model because the brand and issuer are different entities. Paxos Trust Company issues the token and holds the backing reserves; PayPal supplies a major consumer and merchant distribution layer. Paxos publishes monthly reserve reports and offers institutions zero-fee minting and redemption. PayPal’s crypto terms then explain how the reserve economics can be divided: Paxos may deduct interest and other earnings generated by PYUSD reserves as payment for custody services and may share that amount with PayPal. The holder is not entitled to those reserve earnings.

At the same time, PayPal currently advertises 4% annual rewards on eligible PYUSD held on PayPal. That is economically different from a contractual right to the reserve yield. The reward rate is variable, can be changed by PayPal, and is paid through a PayPal rewards program. This distinction is increasingly important under U.S. stablecoin regulation.

This architecture turns rewards into a customer-acquisition decision. PayPal can decide that paying users is worthwhile if higher PYUSD balances improve retention, reduce funding friction, strengthen merchant settlement, lower cross-border payment costs or create future checkout economics. In other words, a stablecoin’s reserve yield can finance a broader payments strategy instead of appearing as a standalone stablecoin profit line.

It also demonstrates why ‘zero fee’ is an incomplete description. Paxos advertises zero-fee minting and redemption for PYUSD institutions. PayPal says buying, selling, holding and transferring PYUSD can be free in eligible flows. Yet reserve assets still earn interest, Paxos can be compensated from those earnings, PayPal can share in them, and PayPal can choose to return some economics to holders as rewards. The money is being made behind the interface rather than necessarily at the point of transaction.

Three Tokens, Three Monetization Architectures

The Hidden Macro Bet: Stablecoin Earnings Are Rate-Sensitive

The industry’s extraordinary profitability has been helped by positive short-term dollar rates. If rates fall, a reserve made mostly of T-bills and overnight repo reprices quickly. The stablecoin liability still costs the issuer little or no direct interest, but the gross income produced by that liability falls.

Circle quantifies the effect indirectly in its filings. Q2 reserve income rose because average USDC supply increased 25.2% year over year, but the benefit was largely offset by a 66-basis-point decline in average yields. Circle estimated that higher average USDC added about $147.4 million of quarterly reserve income while lower yields removed about $113.9 million. This is a real-world demonstration that stablecoin growth can mask rate compression – and vice versa.

A simple sensitivity model shows the scale. A 100-basis-point move applied to Circle’s $76.5 billion Q2 average USDC would change annual gross reserve income by about $765 million. Applied to Tether’s $140.64 billion short-term reserve bucket, the same move represents about $1.41 billion of annualized gross income sensitivity if those assets reprice approximately one-for-one. Applied to PYUSD’s roughly $2.9 billion current circulation, it is about $29 million. These are mechanical scenarios, not forecasts, and they ignore duration, timing, revenue shares and balance changes.

Original sensitivity model. Circle uses Q2 2026 average USDC; Tether uses June 30 cash-equivalent/short-term-deposit reserves; PYUSD uses Oct. 8 market-data circulation. 100 bps = 1 percentage point.

The strategic response to lower rates is predictable: issuers need more float, more fee revenue, cheaper distribution or more services. Circle is building subscription, transaction, fund-management and network businesses. PayPal can treat PYUSD as a payment and merchant-acquisition tool. Tether has already used retained profits to build a wider investment and technology ecosystem, although investments funded from excess capital should not be confused with reserve backing or core stablecoin income.

Regulation Is Rewriting Who Can Keep the Yield

The U.S. GENIUS Act, enacted in July 2025, shifts the business model toward a regulated narrow-reserve structure. Federal implementation is still underway as of October 2026, with the framework expected to become effective in January 2027. Proposed rules require high-quality liquid reserve assets and add licensing, capital, risk-management, AML and sanctions obligations.

One provision has direct economic consequences: permitted payment-stablecoin issuers are prohibited from directly paying interest or yield to holders. A March 2026 Federal Reserve analysis noted, however, that the law does not rule out indirect rewards. That distinction helps explain why the identity of the issuer and the identity of the distributor matter. Paxos can issue PYUSD while PayPal operates a separate rewards program. The arrangement may remain subject to implementing rules and other law, but economically it shows how competition for stablecoin balances can migrate from issuer-paid interest toward platform incentives.

Reserve rules also cap the search for yield. If an issuer must hold mostly short-duration government instruments, it cannot simply offset falling rates by taking materially more credit or duration risk without running into regulatory limits. The likely result is a more transparent trade-off: lower rates compress reserve margins, while scale, fees, services and distribution efficiency become more important.

What Retail Users and Investors Should Actually Watch

For retail holders, the most important takeaway is that a stablecoin balance can be economically valuable to several companies even when the user pays no transaction fee. The holder supplies the float. The issuer or its partners decide how the float economics are divided. If a platform pays rewards, that is usually an incentive layered on top of the token’s legal redemption claim rather than a share certificate in the reserve portfolio.

What Would Break the Stablecoin Profit Machine?

The model is powerful, but not invulnerable. A durable move back toward near-zero short-term rates would sharply reduce reserve income. Regulation could force more conservative reserve structures, raise compliance costs or constrain indirect reward programs. Competition could push a greater share of reserve economics toward exchanges, wallets and users. And if stablecoins become commoditized, distribution may become the scarce asset: the issuer that controls the token but not the customer could capture less of the economics than the platform that owns the wallet, merchant or exchange relationship.

There is also a more basic failure mode: confidence. The float only exists while users believe the token can be redeemed at par. A reserve-loss event, banking interruption, legal restriction or operational failure that damages redemption confidence can shrink supply faster than higher fees can compensate. In a stablecoin model, trust is not merely a brand asset; it is the raw material that creates the interest-earning balance sheet.

Bottom Line

Stablecoin companies do not need to charge users 2% or lend their dollars at double-digit rates to make money. They can earn billions by issuing a non-interest-bearing or low-cost $1 liability, holding highly liquid interest-bearing reserves, and operating at enormous scale. But the headline reserve yield is only the beginning of the analysis.

Circle shows the cost of buying distribution: more than $410 million of Q2 2026 distribution and transaction costs sat between $701 million of total revenue/reserve income and $289 million of revenue less those costs. Tether shows what scale and higher retained economics can produce, reporting $1.5 billion of Q2 operating profit on roughly $184.6 billion of issued tokens, albeit with less granular public financial disclosure. PYUSD shows a third model: Paxos issues and earns custody economics from reserves, PayPal can share in those economics, and PayPal currently returns some value to eligible users through a 4% rewards program.

The competitive question for stablecoins is therefore not simply which token has the largest market cap. It is who controls the float, who controls the customer, who earns the reserve yield, who must be paid for distribution, and what happens to all four when interest rates fall. Stablecoins may look like digital dollars on the surface. Underneath, they are competing architectures for monetizing the economics of idle cash.

Methodology

Research was conducted through October 8, 2026. Company financial data were taken primarily from Circle SEC filings and investor materials, Tether’s BDO assurance report and company disclosures, PayPal SEC filings and legal terms, and Paxos product, transparency and legal documentation. Current token-supply snapshots use DefiLlama and are cross-checked where possible against issuer disclosures. Monetary amounts are rounded for readability.

Derived calculations are illustrative, not forecasts. Circle’s Q2 annualized gross reserve-income intensity equals four times Q2 reserve income divided by Q2 average USDC circulation. The Circle distribution haircut compares the disclosed distribution-and-transaction-cost line with reserve income; it is not a formal gross margin because the cost line also supports non-reserve activities. Tether’s quarterly profit intensity divides the company’s announced Q2 operating profit by gross contractual tokens at quarter end and should not be interpreted as a reserve yield. Rate sensitivity multiplies the stated balance by 1%; it assumes immediate one-for-one repricing and therefore deliberately ignores duration, mix, hedging, balance growth, distribution sharing and operating costs. The PYUSD rewards example applies PayPal’s current 4% advertised reward rate to hypothetical eligible balances; actual eligible balances and the Paxos/PayPal reserve-income split are not publicly disclosed.

Sources

1. Circle Q2 2026 Form 10-Q (SEC) — Reserve income, other revenue, distribution costs, Coinbase payments and rate sensitivity.

2. Circle Q2 2026 earnings release (SEC exhibit) — Average USDC, reserve return rate, RLDC margin and operating indicators.

3. Circle 2025 Annual Report (SEC) — Business model, reserve income dependence and distribution arrangements.

4. Circle Transparency & Stability — Current USDC circulation, reserve architecture and Circle Reserve Fund description.

5. Circle Mint redemption structure — 2026 tiered redemption fee structure.

6. Circle Mint fee schedule — Network, custody and account fee framework.

7. Coinbase Q2 2026 Form 10-Q (SEC) — USDC-related economics and stablecoin business context.

8. Tether Q2 2026 results — Q2 operating profit, issued token scale and reserve buffer.

9. Tether Q2 2026 BDO assurance report — Reserve composition, liabilities, assurance scope and gross contractual token value.

10. Tether fees — Direct acquisition, redemption and verification fees.

11. Tether legal terms — Redemption rights, reserve structure and customer protections/limitations.

12. PayPal Q2 2026 Form 10-Q (SEC) — PayPal/PYUSD issuer relationship and regulatory disclosures.

13. PayPal cryptocurrency terms — Paxos reserve earnings, potential sharing with PayPal and PYUSD rewards terms.

14. PayPal PYUSD product page — Current 4% rewards offer and zero-fee PYUSD user flows.

15. PayPal PYUSD merchant settlement article — 4% merchant rewards and PYUSD settlement use case.

16. Paxos PYUSD transparency — Monthly reserve reports and KPMG attestations.

17. Paxos mint and redeem — Zero-fee institutional mint/redemption and 1:1 redemption.

18. Paxos stablecoin terms — Legal framework for PYUSD and other Paxos-issued stablecoins.

19. Federal Reserve: Payment Stablecoins and Cross-Border Payments — GENIUS Act reserve structure and direct-interest prohibition / indirect-reward distinction.

20. OCC proposed GENIUS Act implementing rule — Proposed reserve, activity and issuer-yield rules.

21. Treasury GENIUS Act implementation update — Expected January 18, 2027 effective date and licensing implementation.

22. DefiLlama stablecoin market data — October 8, 2026 supply/market-cap snapshot for USDT, USDC and PYUSD.

Johan Shamshad

Financial Markets Analyst and Journalist at Dave Finances |  More PostsBio ⮌

Johan Shamshad is a financial markets writer at Dave Finances covering cryptocurrencies, trading platforms, brokers, fintech, financial regulation, and developments across global markets. He previously worked at Gulf News, adding newsroom experience to his coverage of fast-moving financial and digital-asset markets.

His work focuses on identifying market-moving events, company developments, regulatory changes, product launches, and shifts in trading and financial infrastructure.

Johan contributes news and analysis designed to help readers understand not only what happened, but why a development matters and how it may affect the wider financial landscape.

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