Stablecoin yield is interest paid on dollar-pegged tokens (USDC, USDT, DAI, USDe, USDS) from one of five underlying sources: onchain lending demand, tokenized US Treasury bills, DEX liquidity-provider fees, the perpetual-futures basis trade, and protocol-native savings rates. As of Q1 2026, advertised APYs range from about 4% on Coinbase's USDC rewards to 10-20% on sUSDe, with risk scaling with yield. Picking the right source means matching APY to the credit, smart-contract, and tax profile you can tolerate.
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This guide walks through where each unit of yield actually comes from, the dominant venues for each, how to read advertised APYs without getting burned, and how the IRS treats the income at tax time.
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Stablecoin yield comes from five distinct cash flows: borrowers paying interest in lending markets, US Treasury bill coupons passed through to tokenholders, trading fees collected by liquidity pools, funding-rate payments captured by delta-neutral basis trades, and protocol savings rates funded by a treasury's surplus. Each source has a different counterparty, a different risk surface, and a different sustainable APY ceiling.
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The cleanest way to evaluate any advertised APY is to ask: "What pays this?" If the protocol cannot answer in one sentence, the yield is being subsidized by token emissions or undisclosed risk. DeFiLlama's yields dashboard aggregates 12,000+ pools across 200+ protocols and tags every pool with its underlying source, base APY, and reward APY split.
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Yield generation breaks into five categories ranked by underlying risk: (1) tokenized Treasuries, (2) overcollateralized lending, (3) DEX liquidity provision, (4) basis-trade strategies, and (5) protocol savings rates funded by surplus revenue. Each category has a dominant venue, a typical APY band, and a distinct failure mode. Mixing across categories is how most treasuries and retail users build a stablecoin yield portfolio.
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Tokenized Treasury funds hold short-duration US T-bills offchain and pass the coupon through to onchain tokenholders. BlackRock's BUIDL sits at roughly $2.8B supply, Ondo's USDY at $2.1B, and Franklin Templeton's BENJI and Superstate's USTB round out the top tier. APYs track the front of the Treasury curve, currently 4-5%. Risk is whatever the front-month bill carries, plus the issuer's custody and redemption mechanics.
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Lending protocols match stablecoin depositors with borrowers who post crypto collateral (typically ETH, BTC, or other stablecoins) at 125-200% loan-to-value. Depositors earn the borrow rate net of a protocol spread. Aave USDC supply APYs run 3-7% depending on utilization; Morpho's isolated markets often clear 1-2% higher because spreads are tighter. Maple runs undercollateralized institutional lending at 8-12%, which is a different credit profile.
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Stablecoin-to-stablecoin pools on Curve (3pool: DAI/USDC/USDT) and Uniswap v3 stable tiers earn swap fees of 0.01-0.05% per trade. With high volume and tight ranges, base fee APYs reach 2-6%. Add gauge rewards (CRV emissions, CVX boosts) and pools can advertise 5-15%. The risk is depeg: if one of the three tokens loses parity, LPs end up overweight the broken peg, as happened in March 2023 with USDC.
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The basis trade longs spot crypto (typically ETH or BTC) and shorts the equivalent perpetual futures, capturing the funding rate that perp longs pay perp shorts when futures trade above spot. Ethena's USDe wraps this strategy; staked sUSDe pays the funding-rate yield, currently 10-20% but volatile. When perp funding flips negative, the yield can compress to T-bill levels or below. Ethena holds about $3.9B in USDe supply as of Q1 2026.
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Protocol savings rates pay yield from a DAO's surplus revenue rather than a direct external cash flow. Sky's Sky Savings Rate on sUSDS draws from MakerDAO's spread on DAI loans and RWA holdings; the rate is governance-set and historically prints 4-7%. Spark's sDAI works similarly. Coinbase's onchain USDC rewards (currently around 4%) sit in this bucket. funded by Coinbase's economics on the underlying reserves.
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The table below maps the five sources by typical APY, dominant venues, and primary risk. APYs are Q1 2026 indicative ranges; live numbers move with rates, perp funding, and protocol utilization. Always verify on DeFiLlama or the protocol's own dashboard before depositing.

Two patterns stand out. First, the gap between Treasuries (4-5%) and basis trade (10-20%) is roughly the equity-risk premium showing up in crypto form: extra yield exists, but the variance is real. Second, anything advertising above 15% on a plain stablecoin almost always involves leverage, emissions, or undisclosed counterparty exposure.
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An advertised APY mixes a base yield (real cash flow from the source) with reward APY (token emissions paid from a protocol treasury). DeFiLlama splits these on every pool. A 12% headline that breaks down to 3% base plus 9% rewards will collapse the moment emissions are cut. Always read the split, the 30-day moving average, and the protocol's emission schedule before treating an APY as durable.
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Three other adjustments matter. Compounding frequency converts APR to APY. most onchain pools quote APY already, but custodial venues sometimes quote simple APR. Auto-compounding wrappers (yearn-style vaults, Kamino auto-leverage) charge 1-2% performance fees that shave the net. And withdrawal cooldowns (sUSDe's 7-day unstake, sUSDS's instant exit) change the effective liquidity premium.
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From lowest to highest risk: tokenized Treasuries, overcollateralized lending, protocol savings rates, DEX LP positions, basis-trade tokens, undercollateralized lending, and leveraged or emerging-protocol yield. This order reflects how many things have to break for principal to take a loss, not the headline APY. Treasuries break if the issuer fails redemption; sUSDe breaks if perp funding stays inverted long enough to drain the reserve fund.
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The 2022-2023 cycle gave concrete examples. Aave and Compound paid out continuously through Terra (May 2022), 3AC (June 2022), FTX (November 2022), and USDC's March 2023 depeg. Anchor's 20% UST yield, Celsius's 8-17% custodial yield, and BlockFi's 8% all went to zero. Overcollateralization plus open-book liquidations is a different risk surface than promised-rate custodial deposits, and the difference shows up under stress.
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As of Q1 2026, the common allocation looks like this: Coinbase USDC rewards around 4% as a base layer, Aave USDC at 3-7% for onchain users who want overcollateralized lending, sUSDS or sDAI at 4-7% for set-and-forget exposure to MakerDAO's RWA portfolio, sUSDe at 10-20% for users comfortable with funding-rate variance, and Pendle fixed-yield tokens at 8-15% for users who want to lock a rate.
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Solana users frequently reach for Kamino's leveraged USDC vaults at 5-12%, which loop deposits and borrows on Solana lending markets to amplify the base rate. Leverage cuts both ways: a sharp rate spike on the borrow side compresses the spread or triggers deleveraging. None of these venues require Eco's infrastructure, but moving stablecoins between them does. see "Eco's Role" below.
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The IRS treats most stablecoin yield as ordinary income at the moment of receipt, valued in USD on the receipt date, per Rev. Rul. 2019-24 on cryptocurrency hard forks and the 2014 Notice 2014-21 framework that classifies crypto as property. Interest from Aave, Compound, and similar lending positions, rebases on sUSDe and sUSDS, and reward distributions all flow into ordinary-income brackets, currently 10-37% federal.
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Tokenized Treasury distributions can be different. BUIDL and similar funds may distribute dividends that pass through as interest income (Schedule B), and some structures qualify for state-tax exemption on the Treasury portion. The classification depends on the fund wrapper, not the token. Capital-gain treatment generally only applies if you sell or swap the yield-bearing token at a price different from your basis. Consult a crypto-aware CPA for anything non-trivial; this is not tax advice.
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The right source depends on three constraints: how much yield variance you can stomach, how long your capital can sit, and how much smart-contract risk fits your mandate. Treasury-pegged tokens fit a treasurer who wants 4-5% with minimal variance. Aave fits a DeFi-native user who wants 3-7% with daily liquidity. sUSDe fits a yield-seeker comfortable with 10-20% headline and a 7-day unstake.
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A practical default for most users: split capital across two or three sources. A 50/30/20 mix of sUSDS (savings rate), Aave USDC (lending), and a tokenized Treasury (BUIDL or USDY) currently blends to roughly 4-6% with diversified failure modes. Adding a 10-20% sleeve of sUSDe lifts the blended APY toward 6-8% with materially higher variance. Rebalance quarterly as rates move.
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Picking a yield source is one decision; getting capital to that source on the right chain is another. Eco routes stablecoins across 15+ chains so a user holding USDC on Base can deposit into Kamino on Solana, Aave on Arbitrum, or BUIDL on Ethereum without manually bridging, swapping, and paying gas on each leg. The routing is one API call; the destination is wherever the best risk-adjusted yield happens to be that week.
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Sources and methodology. Stablecoin supplies pulled from DeFiLlama on May 4, 2026. APY ranges sourced from DeFiLlama yields, Aave, Compound, Morpho, Maple, Curve, Pendle, Kamino, Ethena, and Sky protocol dashboards. Tax treatment references IRS Rev. Rul. 2019-24 and Notice 2014-21. APYs are indicative Q1 2026 ranges and refresh continuously; verify before depositing.
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