A reward percentage usually measures growth in some unit. If that unit is a volatile token, earning more of it does not ensure that your holding is worth more in dollars, pounds or another currency. Keep the reward calculation and the price calculation separate.
A 10% token increase can coexist with a 12% value loss
Suppose you start with 100 DEMO tokens worth $10 each. During an illustrative one-year period, your token balance increases to 110. At the end, the token’s market price is $8. Ignore all fees and taxes for this example.
| Measure | Start | End |
|---|---|---|
| Token quantity | 100 DEMO | 110 DEMO |
| Price per token | $10 | $8 |
| Marked holding value | $1,000 | $880 |
The token quantity rose 10%, while the marked value fell $120, or 12%. The combined change is (1 + 0.10) × (1 − 0.20) − 1 = −0.12. Adding “+10% rewards” to “−20% price” would give the wrong answer because the ending price applies to all 110 tokens.
At 110 tokens, the fee-free break-even price for the original $1,000 is approximately $1,000 ÷ 110 = $9.09090909. This is not a price forecast. It simply identifies the price that would make these particular quantities balance before costs.
Know what the quoted reward rate means
APR and APY are not interchangeable. APY includes a compounding assumption; nominal APR does not. A displayed rate may also be an estimate from a trailing period rather than a commitment for the next year. For a concrete provider-specific example, Coinbase explains how its displayed staking rewards and commissions are handled. Do not apply that provider’s methodology to every service.
Use the APR ↔ APY calculator only after establishing the input basis. If the rate already includes reinvestment, compounding it again overstates the model. If rewards arrive in a different token, first account for that separate token’s units, price and any conversion costs; a same-asset balance projection does not do this automatically.
Marked value is still not cash received
The $880 example multiplies units by a chosen price. A real sale can involve a spread, trading fees, price impact, withdrawal costs or insufficient liquidity at that price. Rewards that cannot yet be withdrawn are also different from immediately spendable funds.
For your own worksheet, record the starting cost, starting quantity, rewards actually received, any quantity lost or deducted, ending transferable quantity and a dated price reference. Keep pending rewards separate. Only label a sale “realised” when it has occurred; a current market quote is a valuation input, not a completed exit.
Staking has risks beyond a changing price
Ethereum’s staking overview distinguishes self-run, service-based and pooled arrangements. They introduce different operational and counterparty assumptions. A token balance worksheet cannot determine whether an operator will perform properly or a service will remain available.
Ethereum also documents protocol rewards and penalties. Participation outcomes are not always positive. Downtime penalties and slashing are different mechanisms; do not model every possible loss as one flat fee. The rate calculator deliberately excludes negative rewards, penalties and changing conditions rather than implying it forecasts them.
Ask one final comparison question
What would the same starting token quantity be worth without the reward activity, under the same ending price? In the example, 100 tokens at $8 would be $800. The rewarded holding is $80 above that no-reward comparison yet $120 below its starting value. Both statements can be true. Keep the comparison basis visible instead of using “profit” without a reference point.
For a token whose reward exposure is represented by a conversion ratio rather than a growing wallet balance, read stETH vs wstETH. Do not count both a rebase and a wrapper’s ratio change as two independent rewards on the same holding.
Educational information, not a wallet audit, transaction validation or personalised financial advice. Service support and interfaces can change. Report an error with the page URL; never send recovery phrases or private keys.