Cardano staking fees, explained with real numbers
Every Cardano stake pool charges two fees, and they interact in a way most fee comparisons get wrong. This page walks through the actual mechanics with a worked example, and explains effective fee — the only number that tells you what a pool really costs.
The two fees, and the order they apply
- Fixed fee (per epoch): a flat amount the protocol pays the operator out of the pool’s total rewards each epoch, before anything else. It is charged per pool, not per delegator. QUEEN’s is 300 ADA.
- Variable fee (margin): a percentage of what remains after the fixed fee. QUEEN’s is 0.69%.
Order matters: fixed fee first, then margin on the remainder, then everything left is distributed to delegators in proportion to their stake. Rewards are handled entirely by the protocol — the operator never touches delegator funds.
A worked example
The same fee settings cost delegators a different percentage depending on how much the pool earned that epoch — which mostly depends on pool size and block luck:
| Smaller epoch | Bigger epoch | |
|---|---|---|
| Total pool rewards for the epoch | 4,000 ADA | 12,000 ADA |
| Fixed fee taken first | 300 ADA | 300 ADA |
| Variable fee (0.69% of the remainder) | ≈ 25.5 ADA | ≈ 80.7 ADA |
| Operator total | ≈ 325.5 ADA | ≈ 380.7 ADA |
| Delegators receive | ≈ 3,674.5 ADA | ≈ 11,619.3 ADA |
| Effective fee that epoch | ≈ 8.1% | ≈ 3.2% |
That last row is the effective fee: total fees divided by total rewards. It is what you actually pay, and it shrinks as the pool earns more — because the fixed fee is spread over a larger pot.
Three traps when comparing pool fees
- “0% margin” is not 0% cost. Every pool still charges the fixed fee. For a small pool with modest epoch rewards, the fixed fee alone can be a larger effective cost than another pool’s 2% margin.
- The advertised numbers are not the experienced cost. Two pools with identical settings can have very different effective fees depending on their stake and luck. Always think in effective-fee terms — QUEEN publishes its own on the fees page, calculated from the latest settled epoch.
- Fees are not the biggest variable anyway. A percent of margin moves your annual return by hundredths of a percent. Reliable block production and avoiding oversaturated pools matter more — see how to choose a pool.
What about pledge?
Pledge is the operator’s own ADA committed to the pool. Its direct effect on rewards is small at typical pledge levels; its real value is as a signal — an operator with meaningful pledge is invested in the pool’s long-term performance, not just collecting fees. Treat very low pledge on a pool charging premium fees as a yellow flag.
New to staking? Start with how to stake ADA step by step.