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Stablecoins Top U.S. ACH in March With $7.5 Trillion Settled On-Chain

Rising B2B demand in Asia-Pacific signals a shift toward core settlement rails.

Overview

  • Stablecoins processed about $7.5 trillion in March 2026, a monthly total Blockonomi reports exceeded the U.S. ACH bank transfer network, highlighting dollar-pegged tokens as high-volume payment plumbing.
  • Market leadership is shifting as USDC’s organic on-chain volume rose 59% in Q1 2026 while USDT’s fell 17%, and yield-bearing stablecoins expanded 22%, though new U.S. rules tied to the GENIUS Act may limit rewards programs.
  • Roughly 60% of flows now come from business-to-business use, with corporates using tokenized dollars for cross-border treasury and supplier payments, and surveys cited by crypto.news say most financial institutions have begun using or piloting these rails.
  • Adoption is concentrated in Asia-Pacific, which some analyses peg at about 60% of global payment volume, with Southeast Asia seeing an 83x jump in stablecoin-linked card issuance as on-chain spending tools reach more merchants.
  • Chainalysis projects adjusted volumes could reach $719 trillion by 2035, or up to $1.5 quadrillion with a $100 trillion wealth transfer to crypto-native generations and point-of-sale adoption, and notes incumbents like Stripe and Mastercard are buying capabilities to run on these rails.