ACH Payment

Billing Payments

5 min read

Also known as: ACH Transfer, ACH Debit, Electronic Funds Transfer (EFT)

An ACH payment is a bank-to-bank electronic transfer routed through the U.S. Automated Clearing House network, used for invoices and recurring billing.

Definition

An ACH payment moves funds directly between two U.S. bank accounts through the Automated Clearing House network instead of a card rail. Your customer provides a routing and account number, you debit them, and the money settles in one to three business days.

Operators use ACH for invoice payments, subscription renewals, payroll, and vendor disbursements where card fees would eat margin. It's the default rail for B2B billing in the U.S. because per-transaction costs are flat and low, not percentage-based.

ACH is distinct from wire transfers (which are real-time, same-day, and expensive) and from card payments (which clear instantly but carry 2-3% interchange). It's also separate from FedNow and RTP, which are newer instant-settlement rails.

Why It Matters

On a $5,000 monthly subscription, card processing might cost you $150 in fees while ACH costs under a dollar. Across a book of business, that delta funds an entire headcount. ACH also has lower involuntary churn because bank accounts don't expire the way cards do, and they aren't reissued after fraud events.

Teams that ignore ACH push large B2B customers into card payments and absorb the fee drag, or worse, accept paper checks that take weeks to reconcile. You also miss out on the customers who explicitly require ACH for accounts-payable workflows and won't sign a contract without it.

Examples in Practice

A managed services provider invoices a manufacturing client $18,000 per month. The client refuses to pay by card because their AP department only processes ACH. The MSP collects via ACH debit on the first of each month, settles in two business days, and pays roughly $1 per transaction instead of $540 in card fees.

A 200-seat SaaS platform offers ACH as a payment option at checkout for annual plans over $10,000. Conversion on enterprise tiers jumps because procurement teams can route the payment through their existing bank workflow rather than expensing it to a corporate card.

A wholesale distributor moves its net-30 invoicing to ACH debit on the due date. Days sales outstanding drops from 38 days to 31 days because they no longer wait for customers to manually push payments through their bill-pay tool.

Frequently Asked Questions

What is ACH payment and why does it matter?

ACH is a U.S. bank-to-bank electronic transfer rail used for direct deposits, invoice payments, and recurring billing. It matters because it costs a fraction of card processing, settles reliably within a few business days, and is the preferred payment method for most B2B accounts-payable teams. For any business invoicing more than a few thousand dollars per transaction, ACH directly protects margin.

How is ACH different from a wire transfer?

ACH is batch-processed, settles in one to three business days, and costs pennies to a few dollars per transaction. Wires are processed individually, settle same-day (often within hours), and typically cost $15 to $50 on the sending side plus a fee on receipt. Use ACH for routine and recurring payments, and wires for time-sensitive or very large one-off transfers like real estate closings.

When should I use ACH instead of credit cards?

Use ACH when transaction sizes are large enough that card interchange becomes painful, generally anything above a few hundred dollars per charge, and especially for B2B recurring billing. ACH is also the right call when your customers are businesses with formal AP processes, when you want to reduce involuntary churn from expired cards, or when contracts include multi-year terms where fee compounding matters.

What metrics measure ACH performance?

Track ACH return rate (industry healthy is under 0.5%), R01 insufficient-funds rate, average settlement time, percentage of revenue collected via ACH versus card, and effective payment processing cost as a percentage of revenue. Also monitor NACHA-defined unauthorized return rate, which must stay under 0.5% to avoid penalties from your originating bank.

What's the typical cost of ACH payment processing?

ACH typically costs $0.25 to $1.50 per transaction as a flat fee, or 0.5% to 1% capped at a few dollars when processed through a modern payment provider. Compare that to 2.9% plus $0.30 for standard card processing. On a $10,000 invoice, ACH might cost $1 while a card charge costs $290.

What tools handle ACH payments?

ACH is supported by payment processors, modern subscription billing engines, traditional merchant acquirers, treasury platforms, and AP automation tools. Most B2B billing systems include ACH as a native payment method alongside cards. The right category depends on your use case: subscription billing, one-time invoicing, vendor payments, or payroll each have purpose-built options.

How do I implement ACH for a small team?

Start by enabling ACH in your existing billing or invoicing platform, which usually requires verifying your business bank account and signing a NACHA originator agreement. Collect customer bank details through a secure form or micro-deposit verification, then offer ACH as an option on invoices over a threshold like $500. Build a process to handle returns and NSF events, since unlike cards, failures arrive days after the debit.

What's the biggest mistake teams make with ACH?

The biggest mistake is treating ACH like a card payment and assuming a successful debit means the money is yours. ACH can return up to 60 days later for unauthorized debits and several business days later for insufficient funds. Teams that recognize revenue or release product on debit submission rather than on settlement end up clawing back access and rebilling customers, which damages the relationship.

Is ACH secure for collecting customer payments?

Yes, when handled correctly. ACH is governed by NACHA rules that require written authorization from the account holder, secure storage of bank credentials, and specific notification windows for recurring debits. Modern processors tokenize bank account numbers and verify accounts through methods like Plaid or micro-deposits, which reduces fraud risk well below paper check exposure.

Can ACH be used for international payments?

No, ACH is a U.S.-only rail tied to the Federal Reserve and U.S. bank routing numbers. For cross-border bank payments, you need alternatives like SEPA in the eurozone, BACS in the U.K., or international wires through SWIFT. Some payment providers abstract this complexity and let you collect bank payments globally through a single integration, but the underlying rails differ by country.

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