How Real-Time Payments Are Changing Ecommerce

FedNow, the Federal Reserve’s instant payment service, went live in July 2023, 6 years after The Clearing House launched the RTP network. By the third quarter of 2026, the RTP network alone was processing 150 million transactions worth $621 billion in a single quarter, according to its operator. Online retailers have started paying attention because a sale settled in seconds on a Sunday night can pay for Monday’s inventory order.

Transaction Limits

Both US networks now allow a single payment of up to $10 million. RTP raised its ceiling from $1 million in February 2025, and FedNow followed in November of that year. A retailer selling $80 shoes will never approach either figure, so the limits matter mainly to suppliers and marketplaces moving large settlement batches.

The operating hours are of greater use to a small business merchant. Card settlement generally follows banking days, and a card sale made on a Friday evening may not reach the merchant’s bank until the following Tuesday. Instant networks run every day of the year, which shortens that gap to a few seconds for any payment that travels over them.

Cash Timing for Inventory Purchases

The value of faster settlement depends on how a store finances its stock. Paying suppliers on delivery while receiving card funds 2 days after each sale forces a retailer to keep cash on hand to cover the difference, and that requirement grows with sales.

At $50,000 in daily sales and a 2-day delay, about $100,000 is in transit at any moment. During a promotion, when orders spike and inventory has to be replaced quickly, the gap can force a store to draw on a line of credit.

A shorter settlement period reduces that borrowing. The saving is modest for a store with steady sales and generous supplier terms, and much larger for a seasonal seller that places big orders on short notice.

Refunds and Seller Payouts

Refunds and marketplace payouts are the usual starting point, because the retailer controls the decision to send money and needs no change in shopper behavior.

Research cited by Payments Canada found that people who receive disbursements such as insurance claims instantly reported up to 17% higher satisfaction than those waiting for checks or delayed transfers.

Same-day access to earnings gives sellers a motive to stay off a competing marketplace that pays weekly, and independent couriers and contractors tend to rank pay speed among their main concerns. In the same Payments Canada research, 36% of gig workers named the time it takes to get paid as their top payment complaint.

The cost of sending has to be weighed against that benefit. Pricing for instant payments for ecommerce businesses varies by bank and provider, and many retailers reserve instant disbursement for customers who request it or for sellers who pay a small fee for the option.

Bank Payments at Checkout

Accepting instant bank payments from shoppers is a different and harder project. Stores usually pay less per transaction, and the funds arrive with no later reversal by the card network. Implementation usually takes the form of a link that opens the shopper’s banking app, where the shopper confirms the amount. That step adds a handoff between apps, and each handoff is a chance for the customer to abandon the order.

An International Monetary Fund report said in 2023 that Brazil’s Pix system was handling more than 3 billion transactions a month. Reuters reported in February 2026 that Pix accounted for 42% of Brazilian online purchases in 2025, edging past credit cards at 41%, according to a study by a payments firm.

US retail has been slower. Reporting from February 2024 described the adoption hurdles in US retail, and Neil Saunders of the consulting firm GlobalData said American shoppers are accustomed to cards, to spreading out repayment, and to card-linked rewards.

A store offering a bank payment option in the US usually has to pay for that change in behavior with a discount at checkout, and the discount can absorb much of the fee savings.

Finality and Fraud Exposure

A completed instant payment generally cannot be reversed between banks. For a merchant, that finality removes one source of loss, since a customer cannot dispute the charge through a card network. For a customer, it removes a protection.

The Federal Reserve Bank of Kansas City described authorized push scams, in which a victim is deceived into sending money, as a prominent form of fraud in fast payment systems, and noted that victims often have little recourse. A retailer accepting these payments should expect customers to ask what happens if the goods do not arrive, and the answer belongs on the checkout page. Impostor websites that request a bank transfer also threaten the reputation of any store whose name they copy.

Since the original payment cannot be recalled, a return requires a new payment in the opposite direction, and the store needs accurate account details and a record linking the 2 transactions. Stores accepting these payments also need a written refund policy for them, since card network dispute rules do not apply.

Remittance Data

Instant networks use the ISO 20022 messaging standard, which allows a payment to include invoice references, purchase order numbers, and other details in a structured format. Accounting teams can match those payments to orders automatically, and the benefit is largest for stores selling to other companies, where a single bank deposit may cover dozens of invoices.

Operational Requirements

A store’s own bank determines what is possible. Many institutions joined these networks to receive funds only, so a merchant planning to send refunds or payouts has to confirm that its bank can originate payments on each network and ask what it charges per transaction. A provider can often supply that access where the bank cannot.

Round-the-clock settlement also changes treasury work. Sunday payouts require enough money in the funding account on Sunday, when nobody in the finance department is likely to be at a desk, so stores usually set balance alerts and automatic transfers ahead of peak periods.

Holding suspicious orders until staff arrive on Monday does little for a payment that completes in seconds, and screening has to run before the money moves.

Uneven Uptake

The development of FedNow has been slower than that of its private counterpart, with a 2026 Richmond Fed brief putting usage at 2.73 million transactions per quarter, against 128 million for RTP in the first quarter of that year. The same brief found that 26.4% of US banks were FedNow members and 17.2% were RTP members, and it attributed part of the delay to existing services that already feel instant to their users.

Citizens reported in 2026 that the share of midsize companies using instant payments fell from 73% to 64% in a year, as more of them moved to physical credit cards and other methods.

Limits of the Trend

Retailers that begin with refunds and payouts can measure results within a quarter, using support tickets per refund and seller retention as the main indicators. Instant settlement solves a timing problem for money leaving a store, and retailers are adopting it for that reason. A retailer that expects US shoppers to give up card rewards at checkout is applying Brazilian numbers to American habits.