Stax (formerly Fattmerchant) sells a subscription pricing model: a fixed monthly fee in exchange for pass-through interchange and a fixed cents add-on per transaction. The public pricing page returns 403 to most scrapers and does not list current tiers in a machine-readable format, so we flag this as quote-only.
Pulled directly from the vendor pricing page, verified 2026-06-19. We do not re-state any rate the vendor has not put in writing on their own site.
Stax wins for established merchants over roughly $80K monthly volume who can amortise a fixed subscription fee against pass-through interchange. Break-even versus flat-rate depends on volume and card mix.
Not a fit for low-volume merchants where the subscription fee swallows any saving.
The number on the homepage of Stax is rarely the number a finance team books. Below are the line items that almost always show up, sourced from the same vendor pricing page where possible.
Subscription pricing model. Specific tier costs require a sales conversation; flagged quote-only here pending public publication.