Every time a customer taps a credit card at a coffee shop, at least four parties take a cut: the card network (Visa or Mastercard), the issuing bank, the acquiring bank, and the payment processor. The merchant pays 2% to 3.5% of the transaction value in interchange and processing fees. On a $5 coffee, that is 10 to 17 cents per transaction. Across the US economy, merchants paid over $160 billion in card processing fees in 2023, according to the Nilson Report. Blockchain-based payment systems are being built to reduce or eliminate these intermediary layers. The payments application segment already accounts for 25.45% of the $31.18 billion global blockchain market, making it the largest single use case, per Fortune Business Insights.
How Current Payment Systems Work (and Where They Break)
Modern payment systems operate on infrastructure designed in the 1960s and 1970s. Visa’s core network architecture dates to its founding in 1958. The ACH (Automated Clearing House) network, which handles most US bank transfers, was established in 1972. These systems have been upgraded incrementally but their fundamental structure, batched processing through centralised intermediaries, remains unchanged.
The system works, but it creates specific costs. Settlement delay is the first. A merchant who accepts a card payment on Monday does not receive the funds until Wednesday or Thursday. During that gap, the acquiring bank holds the money and the merchant’s cash flow is reduced. For small businesses operating on thin margins, a two to three day settlement delay can mean the difference between making payroll on time or not.
Data from Chainalysis’s 2024 Global Crypto Adoption Index shows that emerging markets in South and Southeast Asia continue to lead grassroots cryptocurrency adoption, driven by remittance use cases and limited access to traditional banking services.
According to CoinGecko’s 2024 annual crypto report, total cryptocurrency market capitalisation exceeded $3.5 trillion by the end of 2024, reflecting renewed institutional interest following spot ETF approvals in the United States.
Chargebacks are the second cost. Because card payments are not final for 60 to 120 days (during which a customer can dispute the charge), merchants must reserve funds against potential reversals. Chargeback fraud cost US merchants an estimated $11.6 billion in 2023. The dispute process involves the merchant, the acquiring bank, the card network, and the issuing bank, each adding processing time and fees.
Cross-border payment fees are the third cost. An American tourist buying goods in Japan pays the merchant’s local processing fees plus a cross-border surcharge of 1% to 3% from their card issuer. The total fee stack for an international card transaction can reach 4% to 5% of the purchase value.
What Blockchain Changes About Payments
Blockchain-based payments alter three structural elements of the payment system: settlement timing, finality, and intermediary count.
Settlement is immediate. When a merchant receives a stablecoin payment, the funds are available within seconds or minutes, depending on the blockchain. There is no two-day settlement window. The merchant can use the funds immediately, improving cash flow and eliminating the need for merchant cash advances or short-term credit to bridge the settlement gap.
Finality is absolute. A confirmed blockchain transaction cannot be reversed without the recipient’s cooperation. This eliminates the chargeback mechanism entirely. A customer who disputes a blockchain payment has no card network to call and no issuing bank to reverse the charge. For merchants in industries with high chargeback rates (digital goods, travel, subscription services), this alone can reduce costs by 1% to 2% of transaction volume.
The intermediary count drops from four or more to one or zero. A stablecoin payment moves directly from the customer’s wallet to the merchant’s wallet on a shared blockchain. No card network, no issuing bank, no acquiring bank, no payment processor. The only fee is the blockchain network fee, which on chains like Solana, Tron, or Polygon is less than one cent per transaction.
Stablecoins as Payment Rails
Stablecoins are the primary vehicle for blockchain-based payments because they maintain a stable value. A merchant cannot accept Bitcoin for a $50 purchase when the price might change 5% before they convert it to dollars. Stablecoins solve this by maintaining a 1:1 peg to the US dollar (or other fiat currencies) through reserves held in cash and short-term treasuries.
Circle’s USDC and Tether’s USDT have a combined market capitalisation exceeding $150 billion. USDC processes over $12 trillion in cumulative on-chain transaction volume. PayPal’s PYUSD, launched in August 2023, added a consumer-facing stablecoin from one of the world’s largest payment companies.
Stripe’s $1.1 billion acquisition of Bridge in October 2024 connected stablecoin payment infrastructure to one of the largest payment processors globally. A merchant using Stripe can now accept stablecoin payments through the same integration they use for card payments. The customer pays in stablecoins. Stripe settles in dollars. The merchant sees the same dashboard, the same reporting, and the same deposit schedule. The blockchain is invisible infrastructure.
Blockchain-based cross-border payments handle approximately $3 trillion per year, growing at 45% annually, per Coinlaw. Domestic payment volume is harder to track but growing as stablecoin acceptance expands among merchants and platforms.
Real-Time Gross Settlement on Blockchain
Central banks are building blockchain-based real-time gross settlement (RTGS) systems that could replace or supplement existing domestic payment infrastructure.
The Federal Reserve launched FedNow in July 2023, a real-time payment system for US banks. FedNow is not blockchain-based, but it shares a key property with blockchain: instant settlement finality. However, FedNow operates through the traditional banking system. A customer must have a bank account, and their bank must be connected to FedNow. As of early 2025, adoption among US banks was still growing, with smaller institutions lagging behind major banks.
Blockchain-based alternatives do not require bank participation. A stablecoin payment between two individuals or businesses settles instantly regardless of whether either party’s bank supports real-time payments. This matters particularly in emerging markets where banking infrastructure is limited. In Nigeria, where only 45% of adults have a bank account, stablecoin payments provide a real-time payment option that does not depend on bank adoption of new systems.
China’s digital yuan (e-CNY) is the most advanced CBDC with domestic payment applications. Over 7 billion yuan in transactions have been processed through the pilot. The e-CNY supports offline payments (transactions between two devices without internet connectivity), which addresses a limitation of both traditional card payments and blockchain-based systems.
Merchant Adoption and Practical Barriers
Despite the economic advantages, merchant adoption of blockchain-based payments remains early-stage. Several practical barriers slow the transition.
Consumer behaviour is the largest barrier. Most consumers in developed markets are accustomed to card payments and have no incentive to switch. Cards offer rewards (cashback, miles, points) funded by merchant interchange fees. A consumer who pays with a stablecoin loses these rewards. Until stablecoin payment apps offer comparable incentives, consumer demand for blockchain-based payments at the point of sale will remain limited in markets with mature card infrastructure.
Tax and accounting complexity is another barrier. In the United States, the IRS treats cryptocurrency (including stablecoin) transactions as taxable events. A consumer who buys coffee with USDC technically realises a gain or loss on the stablecoin itself, creating a reporting obligation. While the practical impact for dollar-pegged stablecoins is minimal (the gain is typically zero), the compliance burden discourages casual use.
Volatility of conversion rates affects merchants in emerging markets. A merchant in Kenya who accepts USDC must convert to Kenyan shillings, and the shilling-to-dollar rate fluctuates. The merchant gains stability against the dollar but assumes currency risk against their local operating expenses.
The Blockchain-as-a-Service segment accounts for 51.72% of blockchain market revenue, per Fortune Business Insights. Much of this infrastructure is aimed at simplifying merchant integration. Companies like BitPay, Coinbase Commerce, and NOWPayments provide merchant payment gateways that accept stablecoins and settle in fiat, abstracting the blockchain layer entirely.
The payment systems of 2030 will likely process a significant share of volume on blockchain rails without consumers or merchants noticing the difference. The card networks recognise this. Visa and Mastercard have both launched stablecoin settlement programmes. Rather than competing with blockchain-based payments, they are integrating blockchain into their existing networks. The disruption is real, but it is happening through absorption rather than replacement.
