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Put two stablecoin yields side by side and the comparison looks simple. One platform advertises 5.2%, another advertises 6.8%, and the second appears better by a clear margin.
It frequently is not. Published rates differ on what generates the yield, how it compounds, whether it is fixed, what currency it pays in, whether the principal can move, and what comes out before you see it. Those differences routinely exceed the headline gap between the two numbers.
An advertised APY is not a measurement. It is a marketing figure produced by a calculation the platform chose, and two platforms rarely choose the same one.
Key Takeaways
- The yield source matters most. It determines what risk you are paid for.
- APR and APY are different numbers. Compounding alone can explain the gap.
- Reward tokens are not dollars. A stablecoin yield paid in something volatile is not one.
- Lockups have a cost. Illiquidity is compensation you should be pricing.
- Net beats gross. Fees, gas, and tax sit between advertised and realised.
Variable One: Where the Yield Comes From
This is the single largest source of non-comparability, and it is rarely stated on the rate card.
Reserve passthrough yields track short-term government rates and carry issuer risk. Lending yields come from borrowers paying interest and carry platform or smart contract risk. Basis trade yields come from funding rate spreads and carry counterparty and funding risk. Liquidity provision yields come from trading fees and carry pool imbalance risk.
Four different rates, four different things being paid for. Comparing them as though they measure the same variable is the mistake that makes everything downstream wrong.
What to do: before comparing two numbers, write down in one sentence what produces each. If you cannot, the comparison is not ready.
Variable Two: APR Against APY
The most common apples-to-oranges error in this category is also the easiest to correct.
APR is the simple annual rate. APY includes the effect of compounding, so the same underlying return produces a higher published number when expressed as APY. At mid single digits the gap is modest, and at double digits it becomes material.
Compounding frequency compounds the problem. Daily compounding produces a different APY from monthly compounding on identical underlying returns, and platforms do not always disclose which they use.
What to do: convert everything to the same basis before comparing, and treat any platform that does not state its compounding assumption as having given you an unusable number.
Variable Three: Fixed or Floating
An advertised rate is a snapshot unless it says otherwise, and most of them are floating.
Lending protocol rates move with utilisation, so a rate displayed today reflects borrowing demand today. Reserve passthrough rates move with central bank policy. Promotional rates on exchanges are frequently time-limited and revert to a lower standard rate afterwards.
A 7% promotional rate for three months followed by 3% is not a 7% product. It is roughly a 4% product presented at its best moment.
What to do: ask what the rate was three months ago and what it reverts to, rather than what it is today.
Variable Four: What Currency the Yield Pays In
A yield quoted in percent implies the return arrives in the asset you deposited. Often it does not.
Where rewards are paid in a platform's own token, the realised return depends on that token's price at the moment you sell, which reintroduces exactly the volatility a stablecoin position was chosen to avoid. A 12% yield paid in a token that falls 40% is not a 12% yield.
The distinction between issuer-paid and platform-paid returns matters here too, since only the second can exist at all under current US rules, as our guide to stablecoin interest explains.
What to do: confirm the payout currency, and if it is not the deposited asset, discount the headline rate rather than accepting it.
Variable Five: Liquidity and Lockups
Two identical rates are not identical products if one can be withdrawn today and the other cannot.
Lockup periods, withdrawal queues, unbonding windows, and utilisation-dependent availability all mean a position may not be exitable when you want it. That constraint is compensation, which is why locked products usually advertise more.
The risk is not theoretical. A lending market with high utilisation can leave depositors unable to withdraw until borrowers repay, a dynamic our guide to staking risks documents in detail.
What to do: treat any rate premium on a locked product as the price of illiquidity, and decide whether you are being paid enough for it.
Variable Six: Whether the Principal Can Move
Some stablecoin yields are earned on a principal that stays at a dollar. Others are not, and the rate card looks the same either way.
Liquidity provision positions can suffer impermanent loss if the pool moves away from balance. Leveraged or looped strategies can be liquidated. Yield-bearing wrappers running basis trades can lose value if funding rates invert.
In each case the advertised yield describes the income and says nothing about the capital, which is the more consequential number.
What to do: establish whether the strategy can return less principal than you deposited, and treat that as a separate question from the yield.
Variable Seven: What Comes Out Before You See It
Gross and net diverge for reasons that are individually small and collectively meaningful.
Platform fees may be deducted from the displayed rate or from the payout. Network fees apply to deposits, withdrawals, and claiming rewards, which matters disproportionately on smaller balances. And yield is taxed as ordinary income at receipt in most jurisdictions, so the after-tax figure is materially lower than the advertised one.
For a small position on an expensive network, gas alone can consume a visible share of the annual return.
What to do: model the round trip including entry, exit, and claiming costs, then apply your marginal tax rate.
How to Normalise Two Rates
Five questions produce a comparison that means something.
What generates the yield, and what risk is that paying for. Is the number APR or APY, and at what compounding frequency. Is the rate fixed, floating, or promotional. In what currency does it pay, and can the principal fall. And what is the net figure after fees, gas, and tax.
Run both candidates through those five and the answer is frequently different from the one the headline numbers suggested. The broader evaluation checklist sits in our risk checklist.
What to do: where two normalised rates land close together, choose the one with the risk you understand rather than the one paying marginally more.
Conclusion
Why are stablecoin yields not comparable? Because published rates differ on source, compounding basis, rate stability, payout currency, liquidity, principal risk, and net cost, and any one of those can outweigh the visible gap between two numbers.
The practical consequence is that headline comparison is worse than useless, since it produces confident decisions on incomparable inputs. A 6.8% product can deliver less than a 5.2% one after compounding assumptions, reward token depreciation, and tax are accounted for.
The habit worth building is simple. Normalise first, compare second, and treat any platform unwilling to disclose what makes its number comparable as having answered the question already.
Read Next:
- Do Stablecoins Pay Interest?
- What Are the Risks of Staking Stablecoins?
- Stablecoin Risk Checklist for Beginners
FAQs:
1. Why do two platforms advertising the same APY pay different returns?
Because the number is produced by different calculations. Compounding frequency, whether the figure is APR or APY, whether the rate is promotional, what currency rewards pay in, and what fees are netted all differ between platforms, and any one of them can exceed the visible gap between two headline rates.
2. What is the difference between APR and APY on stablecoin yield?
APR is the simple annual rate while APY includes the effect of compounding, so identical underlying returns produce a higher published number when expressed as APY. Compounding frequency matters too, since daily compounding yields a different APY from monthly on the same underlying return.
3. Does it matter what currency a stablecoin yield pays in?
Substantially. Where rewards are paid in a platform's own token rather than in the deposited stablecoin, the realised return depends on that token's price when you sell, which reintroduces the volatility a stablecoin position was chosen to avoid.
4. Should I choose the highest advertised stablecoin yield?
Rarely, because the highest advertised rate usually compensates for something. Higher numbers typically reflect lockups, reward token exposure, principal risk, or a yield source carrying more counterparty or protocol risk, so normalising before comparing matters more than the ranking itself.
5. How do I compare two stablecoin yields properly?
Answer five questions for each: what generates the yield, whether the figure is APR or APY and at what compounding frequency, whether the rate is fixed, floating, or promotional, what currency it pays in and whether principal can fall, and what the net figure is after fees, gas, and tax.
Disclaimer:
This content is provided for informational and educational purposes only and does not constitute financial, investment, legal, or tax advice; no material herein should be interpreted as a recommendation, endorsement, or solicitation to buy or sell any financial instrument, and readers should conduct their own independent research or consult a qualified professional.
