How Staking Rewards Are Calculated: APR, APY and Net Yield

Where the rewards actually come from

A proof-of-stake validator earns from three separate sources. Issuance is newly minted currency paid by the protocol for correct attestation and block proposal; it is the base layer of the yield and it scales inversely with how much total stake is on the network. Priority fees are tips paid by users who want their transactions included sooner, and they rise and fall with on-chain activity. The third source, commonly grouped under MEV, is value captured from how transactions are ordered inside a block.

Issuance is comparatively steady and predictable. Fees and MEV are volatile — quiet weeks can deliver a fraction of what a single congested day produces. Any reward figure is therefore a backward-looking average, and the length of the averaging window materially changes the headline number.

APR versus APY, and why the gap matters

APR is a simple annualised rate that ignores compounding. APY assumes rewards are reinvested and therefore earn rewards themselves. At single-digit rates the two are close but not identical: an 3.5% APR compounded daily is roughly 3.56% APY. The difference widens as the rate rises, which is why marketing pages tend to quote whichever figure looks larger.

Compounding is not automatic everywhere. A rebasing liquid staking token effectively compounds because rewards join the staked balance. A network that pays rewards to a separate withdrawal address does not compound until you manually restake. When comparing options, check whether the advertised figure assumes reinvestment you would actually be able to perform.

Subtracting fees and penalties

Gross yield is not what lands in your wallet. Liquid staking protocols take a commission on rewards, typically split between node operators and a protocol treasury or insurance fund; single-digit percentages of rewards are common. That is a fee on rewards, not on principal, so it reduces the effective rate proportionally rather than eating the deposit.

Penalties are the other subtraction. Small inactivity penalties apply when a validator is offline and fails to attest; these are minor and recoverable. Slashing is the severe case, reserved for provably harmful behaviour such as double-signing, and it removes a meaningful slice of the validator's balance. Well-run operators rarely get slashed, but the possibility is why operator diversity matters in a pooled setup.

Transaction costs also count. Depositing, wrapping, moving between chains and eventually withdrawing all consume gas. On a small position, network fees can quietly outweigh several months of rewards, which is one reason liquid staking suits long horizons better than short tactical positions.

Reading a quoted figure critically

Ask four questions of any published number. Over what window was it measured? Does it include MEV and priority fees or only issuance? Is it before or after protocol commission? Does it assume compounding, and is that compounding automatic? A figure that answers all four is trustworthy even if it is lower than a competitor's.

Finally, remember that a staking reward is denominated in the staked asset. Earning a positive percentage in a token whose price fell is not a gain in purchasing power. Reward rate and price exposure are two independent decisions that people frequently blend into one.

Applying the math to a Lido Finance style APR

A headline number such as the one Lido Finance publishes is a trailing average of issuance, priority fees and MEV across its whole validator set, quoted after protocol commission. That makes it a reasonable benchmark for Ethereum liquid staking, but it is still a backward-looking figure: a quiet month lowers it and a congested week raises it, without anything changing about the protocol itself.

Compare like with like by checking the window, the included income sources, the commission treatment and the compounding assumption. Background reading: what a liquid staking token is, liquid staking risks explained and the staking glossary.