
PCI DSS 4.0 requirements affect how developers build payment systems. With future-dated requirements now mandatory as of March 2025, here’s what changed in Requirement 6 for secure development, the new MFA rules in Requirement 8, and how to reduce your PCI scope through architecture choices.

A complete PCI compliance checklist covering all 12 PCI DSS requirements, v4.0 changes that became mandatory in March 2025, and how tokenization and outsourcing can reduce your compliance scope by 93%.