New Payment Rails Are Catching on Slowly: Should You Go Multi-Rail?

On this page 7 sections

1. What Money20/20 Speakers Said About Multi-Rail Payments
2. Why Real-Time Payments Adoption Is Still Slow for Merchants
3. Payment Rails for Merchants, Compared Side by Side
4. Match the Rail to Your Ticket Size and Payment Speed
5. Worked Example: When a Second Rail Pays for Itself
6. Reconciliation and Returns Are the Hidden Cost of Multi-Rail
7. A Step-by-Step Plan for Adding a Second Rail

Key takeaways

• Card fees grow with the size of the sale, but bank rails usually charge per payment. A second rail saves the most on large invoices and the least on small online orders.
• The networks can already carry large payments. RTP has allowed $10 million per payment since February 2025, and FedNow since November 2025. Banks, customers and accounting systems are the slow part.
• RTP, FedNow and stablecoin payments are final, so a payer can't reverse them. ACH debits can be returned, and one bad debit can wipe out the savings from dozens of small orders.
• Pick one rail for one customer group and test it for 60 to 90 days. Count the full cost of each payment, including staff time, before you roll it out further.

Most merchants should add rails one at a time, and only where the numbers justify it. If you send large invoices, bill on a recurring basis or pay out to sellers, you can cut costs and get cash faster by offering ACH or an instant bank payment alongside cards. If your typical sale is a small online order, multi-rail payments will probably cost you more in reconciliation work than they save. Payments leaders at Money20/20 in Las Vegas said much the same this week: the new rails work, but you only get the value once the back-office systems behind them work too.

What Money20/20 Speakers Said About Multi-Rail Payments

On Monday, Oct. 26, 2026, Payments Dive reported that, according to speakers on a Money20/20 panel, some companies have yet to get the full value out of multi-rail systems. Amy Burr is chief product and relationship officer at Federal Reserve Financial Services, which runs the FedNow Service. She made the point merchants should remember: end customers "don't care about the rails, they don't care about the modality." They want money to move reliably and quickly.

Irfan Ganchi of Circle, which issues the USDC stablecoin, said the right rail depends on where the sender and receiver are and what each rail can do. For example, a multinational might move money to its overseas units overnight in stablecoins, then pay local suppliers through domestic instant payments.

CFO Dive's coverage of the same panel was less flattering. Burr said many financial institutions don't want another system to run ("The fatigue is real"). She also pointed to slow bank adoption of ISO 20022, a payment-message standard that carries more data and that Fedwire adopted in 2025. Sam Aarons, CTO of Modern Treasury, said useful features exist but few companies use them.

Why Real-Time Payments Adoption Is Still Slow for Merchants

The networks themselves aren't holding things up. The Clearing House raised the RTP network's per-payment limit from $1 million to $10 million in February 2025. On May 1, 2026, RTP processed a record 2.27 million transactions worth $8.62 billion in a single day. Federal Reserve Financial Services raised FedNow's network limit from $1 million to $10 million, effective November 2025. That was the service's second increase of 2025; the first, in June, raised the cap from $500,000 to $1 million. Under Nacha rules, Same Day ACH has allowed payments of up to $1 million each since March 18, 2022.

Those figures are network ceilings, though, and the limit that applies to you may be much lower. The Fed's FedNow product sheet says participating banks start with a default limit of $100,000 per payment, which each bank can raise or lower. A bank has to join a network, turn on receiving and choose its limits. Your customer's bank has to support the same rail. Your accounting software has to handle a payment that arrives at 11 p.m. on a Sunday. A Standard Chartered executive made the cross-border version of this point at the same conference: according to Fintech Futures, he said most of the effort has gone into improving the rail rather than the whole payment process.

For a merchant, all of this comes down to one rule. A rail is useful only if customers can pay on it easily and your back office can record the payment without manual work.

Payment Rails for Merchants, Compared Side by Side

The rails differ on three questions: who starts the payment, how fast you can use the money, and whether the payer can take it back. The table leaves out fees because what you pay depends on your processor's or bank's pricing on top of network costs such as card interchange. Get a written quote.

Card pricing is mostly a percentage of the sale, so the fee grows with the ticket. ACH and instant payments are usually priced per payment, so their advantage grows as tickets get larger. That difference drives most of the decision. For more on the bank rails, see our comparison of RTP, FedNow and ACH. Our explainer on how open banking payments work at checkout covers pay by bank.

Match the Rail to Your Ticket Size and Payment Speed

B2B and Wholesale Invoices

This is where a second rail pays off fastest. Invoices are large, and many business buyers already pay suppliers by ACH. Invoices paid by keyed card also carry higher fees than in-person sales (see why keyed and online card sales cost more). Offer ACH on every invoice. If your bank can receive RTP or FedNow payments and customers want to pay quickly near quarter-end, add that option too.

Professional Services Retainers and Recurring Billing

Accountants, agencies and law firms that bill monthly retainers can collect by ACH debit once the client signs an authorization. The main risk is a returned debit. Verify the account details before the first payment and keep the signed authorization on file.

Online Stores With Small Orders

For a typical e-commerce order, cards and digital wallets are the better choice. The fee difference per order is small, and one bad consumer bank debit can erase weeks of savings. Pay by bank makes more sense for expensive items such as furniture or electronics.

Marketplaces Paying Sellers and Cross-Border Partners

Payouts are the strongest case for instant rails, because sellers value quick access to their money. Stablecoin rails fit a narrower group of merchants: those whose buyers or payees are outside the U.S. and already hold dollar stablecoins. Before you commit, read our guides to USDC settlement for merchants and the GENIUS Act's stablecoin rules. Check cross-border customers and payees against sanctions lists as well.

Worked Example: When a Second Rail Pays for Itself

These numbers are illustrative, not quotes from any processor. Use the rates from your own statement instead.

Assumptions for a wholesale distributor:

• 40 invoices a month, averaging $6,000 each, all paid by keyed card today
• All-in card cost of 2.9% per invoice
• ACH cost of $0.75 per payment
• Six minutes of staff time to match each ACH payment by hand, at $30 an hour ($3 per payment)
• One returned ACH payment a month, costing a $10 return fee plus 30 minutes of staff time ($15) to collect again
• Half of the invoices (20 a month) move to ACH

On cards, those 20 invoices cost 20 × $174 = $3,480 a month. On ACH, they cost $15 in fees, $60 in matching time and $25 for the return, or $100 in total. Even after counting the back-office work, the distributor saves about $3,380 a month.

Now apply the same math to an online store with a $45 average order. Assume a card cost of 2.9% plus $0.30, or about $1.61 per order, compared with $0.75 by bank. That saves $0.86 an order. But one fraudulent bank debit on a $45 order that has already shipped, plus a $10 return fee, costs $55. That wipes out the savings from roughly 64 good orders. At that ticket size, a second rail isn't worth it unless your fraud controls and account checks are strong.

Reconciliation and Returns Are the Hidden Cost of Multi-Rail

Each rail pays out on its own schedule and sends its own report. Card deposits arrive in batches with fees already taken out. ACH credits often carry little detail about what they're paying for, so someone has to match a $6,000 deposit to the right invoice by hand. Instant payments arrive on weekends and holidays. Stablecoins add a wallet, a conversion to dollars and records your accountant will want at tax time.

Reversals also work differently on each rail. Card disputes go through the chargeback process. ACH debits can be returned, and under Nacha rules consumers get longer than businesses to report an unauthorized debit. Instant payments and stablecoin transfers are final. That protects you from reversals, but it also means each refund is a new payment you have to send and track. Our guide to ACH payments for small business explains the types of returns.

Most of the fix is setup. Ask customers to put the invoice number in every payment reference. Run all rails through one gateway or platform, and connect it to your accounting software so each payment is recorded automatically.

A Step-by-Step Plan for Adding a Second Rail

1. Pull three months of transactions and sort them by ticket size, channel (online, keyed, recurring) and customer type.
2. Calculate your current effective rate on card processing so you have a fair baseline for comparison.
3. Pick one group, such as invoices over a set amount, and one rail for it.
4. Ask your provider for per-payment pricing, return fees and deposit timing. Ask which instant networks your bank can receive payments on, what limits it sets, and how reports get into your accounting system.
5. Write down your rules: authorization wording for ACH debits, account checks for new customers and payment limits for first-time payers.
6. Run a 60- to 90-day trial and measure the all-in cost per payment, days until you have the cash, returns and staff time.

Encourage customers to switch by showing clear payment options on your invoices rather than forcing a change. For the card payments you keep, a compliant program such as dual pricing can sometimes offset fees. Card network rules and state laws apply, so confirm the details with your provider and a qualified advisor.

To compare options, review MannyPay's online payment options and payment gateways, or request a free quote. A MannyPay specialist responds within one business day. The open question after Money20/20 is whether banks will raise their own instant-payment limits and offer request-for-payment features to business customers. You don't need to wait for that. Run step 1 this week, because your own transaction data will show whether a second rail is worth adding.

Sources

1. New payment rails catch on, slowly (Payments Dive)
2. Multi-rail payments adoption pace irks advocates (CFO Dive)
3. Money20/20 USA 2026 wraps with cross-border payments and open banking in focus (Fintech Futures)
4. FedNow Service will raise transaction limit to $10 million (Federal Reserve Financial Services press release, Sept. 2025)
5. FedNow Service launches new risk mitigation features and $1 million transaction limit (Federal Reserve Financial Services press release, June 24, 2025)
6. FedNow plans to boost limits for real-time payments (American Banker)
7. FedNow Service Product Sheet (Federal Reserve Financial Services)
8. RTP Network $10 Million Transaction Limit Spurs High-Value Payment Surge (The Clearing House)
9. RTP limit to rise to $10M for 2025 (Payments Dive)
10. RTP Network Marks May Day with Record-Breaking Volume and Value (The Clearing House)
11. Same Day ACH $1 Million Per Transaction Limit Guidance (Nacha)

AR

About the author

Adrian Reyes

Adrian Reyes is Senior Payments & Fintech Editor for Beyond the Swipe, covering credit card processing, merchant accounts, payment technology and processing fees.

This article is for general educational purposes and is not legal, tax or financial advice. Card network rules and state laws change; confirm current requirements for your business.