Stablecoin APY Calculator

Understanding the Stablecoin APY Calculator

A stablecoin APY calculator estimates what parking dollar-pegged crypto on a lending platform might earn over a year. The arithmetic is trivial. The part that deserves your attention is why a dollar-equivalent asset is offering 5-7% when a bank savings account offers less, because that spread is not free money, it's compensation for risks the yield figure doesn't mention.

How it actually works

Enter the amount you'd deposit and select a platform, and the calculator applies that platform's representative APY to produce annual and monthly earnings. On $10,000 at 5.5%, that's roughly $550 a year or about $45.83 a month. Treat every rate here as indicative rather than current: stablecoin yields move constantly with borrowing demand, sometimes within a single day, so verify the live rate on the platform itself before committing anything.

The deeper context most people miss

The single most important thing to understand is that a stablecoin deposit is not a bank deposit. There is no FDIC insurance, no NCUA coverage, and generally no regulator standing behind it. When a centralised crypto lender fails, depositors become unsecured creditors in a bankruptcy proceeding, which is exactly what happened to customers of Celsius, BlockFi, and Voyager in 2022, several of whom waited years for partial recovery. The yield differential over a savings account is the market pricing that difference, and treating the two as comparable products because both are denominated in dollars is the core mistake.

Where the yield actually comes from, and how to tell sustainable from not

Any yield has to be paid by someone, and knowing who tells you a great deal about whether it will last. The most durable source is overcollateralised lending: a borrower posts, say, $150 of volatile crypto to borrow $100 of stablecoins, and pays interest for the privilege. That interest funds your yield, the loan is backed by more collateral than it's worth, and the rate rises and falls with genuine borrowing demand. This is real economic activity and yields in the 3-8% range from this source are broadly explicable. The second source is centralised platforms lending deposits out, sometimes to institutional borrowers, sometimes for trading strategies, and here the crucial question is what the platform actually does with the money, which many disclose only vaguely. The third source is liquidity provision, earning trading fees, which is legitimate but carries impermanent loss risk that isn't obvious to newcomers. The fourth source is protocol token emissions, where a project pays you in its own newly issued token to attract deposits, and this is where scepticism should be sharpest: those yields are often spectacular, frequently advertised at 20% or far higher, and structurally unsustainable, because the protocol is printing tokens rather than generating revenue. When the emissions slow or the token price falls, the advertised APY evaporates and often the deposit does too. A useful heuristic: if you cannot explain in a sentence who is paying your yield and why they're willing to, you probably shouldn't be earning it.

A worked example: comparing the real risk-adjusted return

Put $10,000 into a stablecoin platform at 5.5% and you'd expect $550 over a year. Put the same $10,000 into an FDIC-insured high-yield savings account paying, say, 4.2%, and you'd get $420. The stablecoin option looks $130 better, a 31% improvement in yield. Now weigh what that $130 is buying you. The savings account is insured up to the standard federal limit, so a bank failure costs you nothing. The stablecoin platform carries at minimum a risk of platform insolvency, a risk of the stablecoin itself de-pegging, and a risk of smart contract exploitation, each low-probability in any given year but each capable of taking the entire $10,000 rather than just the yield. For the trade to be worth it, you'd need to believe the combined annual probability of total loss is well under 1.3%, since a 1.3% chance of losing $10,000 has an expected cost of $130, exactly cancelling the extra yield. Looking at what happened across the sector in 2022, when several large platforms went to zero within months of each other, assuming a sub-1% annual failure probability across the whole category looks optimistic. That doesn't make the trade unreasonable for someone who understands it, but it does mean the extra $130 is compensation, not a bonus.

Deciding how much, if any, to allocate

If you've concluded the risk is worth taking, the next question is sizing, and this is where most retail losses actually originate. The failures of 2022 were painful in aggregate not because the platforms failed, which was always possible, but because a lot of people had concentrated large fractions of their savings there, often having been told repeatedly that stablecoin yield was the safe corner of crypto. A reasonable framing treats a stablecoin yield position not as a savings account substitute but as a risk asset that happens to have low price volatility, and sizes it accordingly, meaning an amount you could lose entirely without it changing your life. Diversifying across platforms helps with idiosyncratic platform failure but not with correlated risk, which is the kind that actually shows up: in a genuine sector-wide stress event, multiple platforms freeze withdrawals simultaneously, as they did. Splitting across stablecoins helps somewhat more, since USDC, USDT, and DAI have different backing structures and different failure modes. And keep your actual emergency fund somewhere insured and instantly accessible, because the moment you need emergency money is disproportionately likely to coincide with the moment a crypto platform halts withdrawals.

The peg itself is a risk, and not all stablecoins are equal

Beneath the platform risk sits a more fundamental one: the assumption that a stablecoin is worth a dollar. Different stablecoins maintain their peg in fundamentally different ways, and those mechanisms have very different track records. Fiat-collateralised coins such as USDC and USDT claim to hold reserves in cash and short-term government securities, and their reliability depends on whether the reserves are genuinely there and genuinely liquid, which is why reserve attestations and their frequency matter. Even these can slip: USDC briefly traded well below a dollar in March 2023 when a portion of its reserves was held at Silicon Valley Bank during that bank's failure, recovering only once the deposits were guaranteed. Crypto-collateralised coins like DAI are backed by overcollateralised crypto positions, transparent on-chain but exposed to sharp collateral drawdowns. Algorithmic stablecoins, which attempted to hold the peg through supply mechanisms rather than reserves, have the worst record by a wide margin: TerraUSD collapsed from its dollar peg to near zero in May 2022, destroying tens of billions in value within days and taking a great many depositors with it. The lesson generalises: check what actually backs the coin, prefer transparent and frequently attested reserves, and treat any stablecoin whose peg depends on market incentives rather than assets with deep suspicion regardless of the yield offered.

Variations: APR vs APY, lock-ups, and tax treatment

A few mechanical details change the real return. APR and APY differ by compounding, and platforms are inconsistent about which they advertise: 5.5% APR compounded daily is roughly 5.65% APY, and a platform quoting APY looks better than one quoting APR at the same nominal figure even when they're identical. Lock-up terms matter more than the rate difference they buy, since a higher yield in exchange for a 30 or 90-day lock removes exactly the ability to withdraw that you'd want during a stress event, which is precisely when the lock will bind. Variable versus fixed rates matter too: most stablecoin yields float with borrowing demand and can fall sharply, so a rate quoted today is not a rate you'll earn all year. Tax treatment is the detail most often overlooked: in the US, stablecoin yield is generally taxable as ordinary income when received, and depending on how a platform structures the arrangement there can be additional complexity around whether transactions are disposals. Yield taxed at a marginal income rate is meaningfully less attractive than the headline figure suggests, and the comparison against a savings account, whose interest is taxed the same way, is at least apples to apples on that dimension.

Approaching stablecoin yield with clear eyes

Work out who is paying your yield and why before depositing anything, and treat inability to answer that as a reason to walk away. Strongly prefer yields explicable by real borrowing demand over those funded by token emissions, however attractive the latter's headline number. Check what backs the specific stablecoin and favour transparent, frequently attested fiat reserves over algorithmic mechanisms. Size the position as a risk asset you could lose entirely, not as a savings substitute, and keep your genuine emergency fund in an insured account. Avoid lock-ups, since the flexibility to withdraw is worth more than the extra yield precisely when you'd need it. Verify the live rate rather than relying on any published figure, and remember the yield is generally taxable as ordinary income.

What people get wrong

• Treating a stablecoin deposit as equivalent to an insured savings account, when there is no FDIC or NCUA coverage and depositors rank as unsecured creditors in an insolvency.
• Chasing double-digit yields funded by protocol token emissions rather than genuine borrowing demand, which are structurally unsustainable.
• Assuming the dollar peg always holds, when USDC slipped below a dollar in March 2023 and TerraUSD collapsed entirely in May 2022.
• Accepting a lock-up period for a slightly higher rate, which removes the ability to withdraw exactly when a stress event makes withdrawal urgent.

Where the math comes from

Yearly Earnings = Amount × (APY / 100). Monthly Earnings = Yearly Earnings / 12. The platform selection applies a representative APY (5.5%, 4.8%, 7.2%, or 5.0% depending on platform). This is a straightforward annual yield calculation and does not model compounding frequency, rate changes over the period, platform fees, or any of the principal risks described above.

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