How do I offer monthly and annual billing options for the same subscription tier in Paid Memberships Pro?

Create a separate PMPro membership level for each billing option — for example, “Premium — Monthly” and “Premium — Annual.” Then map both levels to the same Benecaster tier in Benecaster → Settings → Subscription → Tier Mapping.

Benecaster checks all of a subscriber’s active membership levels. Whichever option they purchased, if it maps to a tier, they get that tier’s feed access. There is no limit on how many PMPro levels can map to the same Benecaster tier.