September 8, 2026
ACH payments
ACH payments are electronic bank-to-bank transfers processed through the Automated Clearing House network in the United States, where a customer authorizes a business to pull funds directly from their checking or savings account using the account number and bank routing number rather than a card.
For a subscription business, ACH is a way to collect recurring charges straight from a customer's bank account instead of a credit or debit card. It is an asynchronous payment method: unlike a card authorization that approves or declines in real time, an ACH debit is submitted in a batch and clears over the following days, so the final success or failure of the payment comes back after the fact. That timing shapes how a business bills, confirms, and recovers on ACH.
Why ACH payments matter for subscription businesses
ACH gives a subscription business a lower-cost way to collect recurring revenue and a payment method that does not expire or get reissued the way a card does. Card fees are typically charged as a percentage of the transaction, so on large or frequent charges they add up quickly, while ACH is usually priced as a flat fee per transaction, which makes it attractive for high-value B2B invoices and long-lived subscriptions. Because a bank account changes far less often than a card number, ACH also reduces involuntary churn from expired or reissued cards, which is one of the quiet leaks Dunning exists to catch.
The tradeoff is that ACH is slower and settles asynchronously, so a business has to design around funds that are not confirmed at the moment of checkout. A returned ACH debit can arrive days after the charge appeared to succeed, which means Dunning and Collections have to account for late failures, and Revenue recognition has to treat an ACH payment as truly settled only once the return window has passed.
How ACH payments work
An ACH payment moves money from the customer's bank to the business's bank through a batched clearing process rather than an instant authorization.
Authorization: the customer provides their bank account number and routing number and authorizes the business to debit the account, either once or on a recurring schedule. This mandate is what makes later pulls legitimate.
Submission: the business, through its payment provider, submits the debit into the ACH network as part of a batch rather than as a real-time request.
Clearing: the ACH network routes the debit to the customer's bank, which checks the account and either allows the debit or returns it. This step takes several business days rather than seconds.
Settlement: if the debit is honored, the funds move to the business's bank account and the charge is considered collected.
Return handling: if the bank rejects the debit, for reasons such as insufficient funds, a closed account, or a revoked authorization, it sends back a return that the business must reconcile, which usually means marking the payment failed and routing it into recovery.
Common mistakes with ACH payments
Treating an ACH debit as final at submission, then recognizing revenue or shipping value before the return window has closed, so a later return leaves the business short.
Collecting a weak or missing authorization, which makes a disputed debit hard to defend and can force a reversal.
Not distinguishing an ACH return from a card decline in the billing logic, so retry timing and customer messaging that suit a card are applied to a bank transfer that behaves differently.
Retrying a returned debit blindly, without reading the return reason, when some reasons, such as a revoked authorization or a closed account, mean the charge should never be attempted again.
Assuming ACH works for every customer, when the network is US only and requires a US bank account, leaving international subscribers to be billed another way.
Benefits and examples
Lower processing cost on large or recurring charges, since ACH is generally a flat per-transaction fee rather than a percentage of the amount.
Less involuntary churn, because bank details change far less often than card numbers that expire or get reissued.
A natural fit for B2B billing, where buyers often prefer to pay sizeable invoices from a bank account rather than put them on a card.
Sticky recurring collection: once a bank mandate is in place, the business can debit each cycle without asking the customer to re-enter payment details.
A useful fallback or alternative when a customer's card is repeatedly declined but their bank account is in good standing.
Frequently asked questions
What are ACH payments? ACH payments are electronic transfers between US bank accounts, made through the Automated Clearing House network, where a customer authorizes a business to debit their checking or savings account directly instead of paying by card.
How long do ACH payments take to clear? ACH debits settle over several business days rather than instantly, because they are processed in batches and routed through the customer's bank, which can honor or return the debit. A business should treat the payment as final only after the return window closes, typically two business days for most returns, though a consumer's unauthorized-debit claim can still return the payment up to 60 calendar days after settlement.
How is ACH different from a card payment? A card payment authorizes in real time and either approves or declines at checkout. An ACH debit is asynchronous: it is submitted in a batch and can be returned days later, so success is confirmed after the fact rather than at the moment of the charge.
Why do businesses prefer ACH for recurring billing? ACH usually costs less on large charges because it is priced as a flat fee rather than a percentage, and bank details change less often than cards, which reduces failed renewals and involuntary churn.
What happens when an ACH payment is returned? The customer's bank rejects the debit and sends back a return with a reason code, such as insufficient funds or a closed account. The business marks the payment failed and routes it into recovery through Dunning, though some return reasons mean the debit should not be retried at all.
Can ACH be used for international customers? No. ACH is a US-only network and requires a US bank account. Businesses billing customers in other countries need a different bank transfer or local payment method for those subscribers.
