What fee did Visa implement that is similar to MasterCard's NABU?

The fee that is similar to MasterCard's NABU (National Acquirer Bank Upgrade Fee) implemented by Visa is indeed the U.S. Acquirer Processing Fee. This fee is designed to cover the costs associated with the processing and management of transactions by acquirers when they handle Visa card transactions.

The U.S. Acquirer Processing Fee is intended to align with industry standards for transaction processing and reflects the ongoing investment in network infrastructure and technology improvements that payment networks like Visa must undertake to ensure secure and efficient transaction processing.

This fee typically affects acquirers, who are responsible for managing and delivering services to merchants. By implementing a fee that mirrors MasterCard's NABU, Visa is ensuring competitive parity within the payment processing industry and fostering an environment that encourages acquirers to invest in their own capabilities to better serve both merchants and cardholders.

Understanding the context of this fee helps to grasp the operational paradigms within the payment processing industry, revealing how fees are structured to manage costs associated with transaction processing and network upgrades.