Google Inc. won’t earn any transaction fees from credit-card issuers for its coming mobile-phone payments service, unlike Apple Inc., because of evolving ground rules for the services.

Credit-card issuers hope the changes pressure Apple to trim or eliminate its fees, say industry executives, highlighting the speed at which the economics are changing in the evolving mobile-payments business.

Google disclosed its payments service, Android Pay, in late May, with wireless providers, payment networks, retailers and banks, stepping up competition with Apple Pay, which launched late last year.

Hundreds of financial institutions scrambled to work with Apple Pay, afraid of being left at a competitive disadvantage. As a result, big banks and other card issuers agreed to give Apple 0.15% of the value of each credit-card transaction. For bank debit cards, Apple collects a half-cent per purchase, according to people familiar with the service.

Google isn’t getting transaction fees from bank issuers, said people familiar with the situation. That is because Visa Inc. and MasterCard Inc., which operate the dominant payment networks, recently standardized their “tokenization” card-security service and made it free, preventing payments services from charging fees to issuers.