Compare commissions on a common reward base
Gross annual rewards equal principal × gross APR. Commission A equals gross rewards × rate A, and commission B equals gross rewards × rate B. Net rewards for each option equal gross rewards minus its commission. The retained-reward advantage of A over B equals gross rewards × (rate B − rate A). Keep commission percentages separate from gross APR because they apply to the reward amount, not directly to principal.
Trace the annual reward difference
Suppose a hypothetical principal is 10,000 units and gross APR is 8%. Gross rewards are 800 units. Validator A charges 5% of rewards, deducting 40 and leaving 760. Validator B charges 12%, deducting 96 and leaving 704. A retains 56 more units per year under equal performance. The seven-percentage-point commission difference translates into a 0.56-percentage-point difference in simple yield on principal.
Recognize when equal performance is unrealistic
The comparison holds reward generation constant and does not model uptime, penalties, payout schedules, minimum charges, or changes in commission. A higher gross reward rate can offset a higher commission, but that requires separate scenarios with different assumptions. Token price changes also affect cash value. With zero gross rewards, percentage commissions produce no deduction in this model. Fixed service charges are excluded and can be assessed separately with the staking net yield calculator.