IntelliPay is a PCI DSS Level 1 payment processor that helps businesses set up and manage ACH payment acceptance alongside card processing. This guide covers what ACH actually costs, how it works, and what to watch for on the compliance side. Learn more about IntelliPay's payment options.
By Dale Erling, IntelliPay | Payment technology and government payment systems
Quick Read
ACH payments move money bank to bank instead of through a card network. Standard processing often settles in one to three business days, at a fraction of what card processing costs.
- In 2024, the ACH Network processed 33.6 billion payments worth $86.2 trillion, up 6.7% in volume and 7.6% in value from 2023. B2B ACH volume grew 11.6% to 7.3 billion payments.
- ACH typically runs $0.20 to $1.50 per transaction versus 2 to 3 percent plus a per-transaction fee for cards, but the actual dollar savings depend heavily on your average transaction size, not just your total volume.
- Nacha's return rate thresholds are 0.5 percent for unauthorized debits, 3 percent for administrative returns, and 15 percent overall, measured over a rolling 60 day period.
- Nacha's Credit-Push Fraud Monitoring rules began taking effect in 2026. Phase 1 started March 20, 2026, and Phase 2 extended requirements more broadly in June 2026, adding risk-based fraud-monitoring expectations for covered ACH participants.
ACH, short for Automated Clearing House, is the network banks use to move money electronically between accounts. When a business accepts ACH, it's pulling funds directly from a customer's bank account (an ACH debit) or receiving funds a customer pushes to it (an ACH credit), instead of routing the payment through a card network. For a lot of small businesses, particularly ones billing recurring invoices, subscriptions, or vendor payments, that difference in mechanics translates directly into lower cost.
What ACH payments actually are
ACH debits are how a business pulls funds from a customer's account, a common setup for subscriptions and recurring bills. ACH credits are how a payer or business pushes funds to another account, as in payroll, supplier payments, and some bank bill-pay transactions. ACH is primarily a U.S. payment network, but cross-border payments that use the ACH Network must be formatted as International ACH Transactions, or IAT entries, with additional data and screening requirements. For international transfers outside the ACH Network, businesses commonly use wire transfer networks such as SWIFT or regional systems such as SEPA in Europe.
Every ACH transaction carries a Standard Entry Class, or SEC, code that identifies how it was authorized and what type of transaction it is. The ones you're most likely to run into are WEB for internet initiated consumer payments, TEL for phone initiated entries, CCD for corporate payments, CTX for B2B payments carrying invoice data, PPD for standard consumer debits and credits, ARC and BOC for converted paper checks, and IAT for international transfers. Getting the SEC code right matters for compliance, not just recordkeeping. Our full SEC code glossary covers each one in more detail.
Speed and cost, side by side
Standard ACH processing uses batches and often settles in one to three business days, which is slower than a card authorization but fast enough for most billing cycles and predictable enough to plan cash flow around. Cost is where ACH really separates from cards: per transaction fees generally run $0.20 to $1.50, compared with 2 to 3 percent plus a small per transaction fee for card processing.
Where the real savings come from
A flat "you'll save $X on $100,000 in monthly payments" number is misleading, because ACH is priced per transaction and cards are priced as a percentage. A business collecting fifty payments of $2,000 each will save dramatically more, relative to volume, than one collecting five thousand payments of $20 each. Run the comparison against your own transaction count and average ticket size, not a generic industry example.
| Payment method | Illustrative cost | Illustrative settlement | Best fit |
|---|---|---|---|
| ACH | Often priced per transaction; actual pricing varies by provider, volume, verification, and risk profile | Often 1 to 3 business days; Same Day ACH may be available | Recurring billing, B2B, payroll |
| Credit card | Often percentage-based plus a per-transaction fee; actual rate depends on card mix and pricing model | Authorization is immediate; funding timing varies by processor and payment flow | E-commerce, point of sale |
| Domestic wire | Often $15 to $50, varies by bank | Often same day | Urgent, high value transfers |
As illustrative examples only: ACH transaction fees often fall somewhere in the $0.20 to $1.50 range, and card processing often runs 2 to 3 percent plus a small per-transaction fee. Treat both as examples, not quoted pricing. Your actual rates depend on your processor, volume, verification requirements, and risk profile.
ACH can avoid one common recurring billing problem: bank accounts don't expire the way cards do. That may reduce failures tied specifically to expired or reissued card credentials, although ACH payments can still fail because of insufficient funds, closed accounts, revoked authorization, or incorrect account information.
Risk management: returns and compliance
ACH payments get returned for a handful of reasons: insufficient funds, closed accounts, or a customer disputing the transaction as unauthorized. Nacha sets specific return rate thresholds that originators are expected to stay under, measured on a rolling 60 day basis: 0.5 percent for unauthorized debit returns, 3 percent for administrative returns, and 15 percent for the overall return rate across all reasons. These numbers are not interchangeable, and it's worth being precise about which one applies where, since the unauthorized threshold is dramatically tighter than the overall one.
Exceeding any of these thresholds can trigger review from your originating bank and, in persistent cases, added scrutiny or even a loss of ACH origination privileges. Use the authorization method required for the applicable SEC code, retain the required authorization records, protect bank account data, and validate accounts before initiating payment. Those are the core practices that keep return rates under control rather than testing the thresholds.
Nacha's rules also give consumers a defined window, generally 60 days from when their bank statement shows the error, to dispute an unauthorized ACH debit, so clean authorization records aren't optional paperwork. They're what protects you if a dispute happens.
One more thing worth knowing in 2026: Nacha's Credit-Push Fraud Monitoring rules began taking effect in phases. Phase 1 became effective March 20, 2026, applying to all ODFIs and to certain high-volume non-consumer Originators, Third-Party Service Providers, and Third-Party Senders. Phase 2 expanded the requirements more broadly in June 2026. The focus is on risk-based processes reasonably intended to identify ACH credit entries initiated due to fraud. This is an additional compliance expectation, not a replacement for debit-return-rate monitoring, so confirm with your bank or processor how the requirements apply to your ACH program.
Where ACH volume actually stands
In 2024, the ACH Network processed 33.6 billion payments worth $86.2 trillion, up 6.7 percent in volume and 7.6 percent in value year over year. B2B payments grew fastest, up 11.6 percent to 7.3 billion payments, and consumer internet payments rose 8.4 percent to 10.7 billion. More recent Nacha reporting puts 2025 volume at roughly 35.2 billion payments worth about $93 trillion, continuing that same growth trend. None of this is a reason to switch payment methods on its own, but it does confirm ACH isn't a niche or shrinking option. It's core payment infrastructure that's still growing, particularly on the B2B side.
Why this matters for a small business specifically
Four things tend to matter most for a smaller operation. Lower cost per transaction, particularly valuable on larger invoice amounts where a card's percentage based fee gets expensive fast. A reduction in one specific type of failed payment, since bank accounts don't expire the way cards do, though other causes of failure still apply. Broad domestic reach, since ACH is supported across the U.S. banking system and gives businesses an option beyond card network acceptance. And settlement timing that can be easier to plan around once you understand your processor's funding schedule, return window, and any risk-based holds.
Getting started with ACH
A few practical steps before you turn ACH on: choose a processor that supports ACH alongside account validation and fraud tools, not ACH as an afterthought bolted onto a card platform. Use the appropriate authorization process for each payment channel and SEC code, and retain the required records. Run account validation before you originate a payment rather than finding out an account is closed after the fact. Reconcile ACH transactions against your invoices using your processor's batch reporting rather than doing it manually. And monitor your return rates on an ongoing basis so you catch a drift toward the thresholds above before it becomes a problem with your bank.
Frequently asked questions
How long does ACH processing actually take?
Standard ACH processing often takes one to three business days. Same Day ACH is available for eligible payments and may be useful when faster movement of funds matters, although availability, cutoff times, transaction limits, and fees depend on the bank and processor.
Can ACH payments be reversed or disputed?
Yes. Returns happen for insufficient funds, closed accounts, or a customer disputing the transaction as unauthorized. Consumers generally have about 60 days from when their statement shows the transaction to dispute it as unauthorized, which is why clean authorization records matter.
What return rates do we actually need to stay under?
Three separate thresholds, measured on a rolling 60 day basis: 0.5 percent for unauthorized debit returns, 3 percent for administrative returns, and 15 percent overall. The unauthorized threshold is the one to watch most closely since it's far tighter than the overall figure.
Do customers need special software to pay by ACH?
No. They generally need their bank account and routing number, and the payment must be authorized using the method required for the applicable payment channel and SEC code. That may involve a secure online form, an electronic authorization, or, for eligible phone-initiated entries, a recorded oral authorization.
Can businesses use ACH for international payments?
ACH is primarily a U.S. payment network, but some cross-border transactions can move through the ACH Network as International ACH Transactions, or IAT entries. IAT payments carry additional data and screening requirements. For international transfers outside the ACH Network, businesses commonly use SWIFT wires or regional systems such as SEPA in Europe.
The bottom line
ACH can be a lower-cost alternative to cards for recurring and B2B billing, especially when transaction amounts are large enough for percentage-based card fees to add up.
Set it up with proper authorization, validate accounts before you originate, and keep an eye on your return rates and Nacha's newer fraud monitoring requirements as they apply to your account.
To talk through adding ACH to your current setup, visit IntelliPay.
Sources and further reading
- Nacha, ACH Payments Fact Sheet and 2024 ACH Network volume and value reporting.
- Nacha, Nacha Operating Rules, including return-rate thresholds and the phased 2026 Credit-Push Fraud Monitoring rule changes.
- Federal Reserve, Payment Systems overview.
Disclaimer: This content is for general informational and educational purposes only and does not constitute legal, financial, or regulatory advice. ACH costs, settlement timing, and Nacha rules referenced here reflect general industry information as of the date of publication and are subject to change. Actual costs and savings depend on your processor, transaction volume, average transaction size, and industry. Businesses should consult their bank, payment processor, and qualified legal counsel to confirm current Nacha rules and compliance requirements before implementing any ACH program.
