ACH vs. credit card for invoices: which should you offer?

For most invoices, ACH costs less than a credit card, especially on large amounts, because ACH fees are often flat while card fees are mostly a percentage of the payment. Cards win on convenience, instant approval and buyer preference, so the usual answer is to offer both and steer large invoices toward ACH.

This guide compares the two side by side for businesses that send invoices, from contractors and wholesalers to medical practices and schools. For how the ACH network itself works, see our ACH payment processing page.

The side-by-side comparison

	ACH (bank transfer)	Credit card
How it’s priced	Often a flat per-payment fee, depending on your setup	Mostly a percentage of the amount, plus a small per-payment fee
Cost on a large invoice	Usually much lower	Grows with the invoice amount
Approval	No instant approval. Problems show up as returns later	Approved or declined in seconds
When funds arrive	Usually within a few business days	Usually within one to a few business days
What the customer needs	Bank routing and account number, plus authorization	A card
Disputes	Returns under ACH rules, including unauthorized debits	Chargebacks under card-brand rules
Buyer appeal	Popular with accounts-payable teams on large bills	Popular with buyers who want float or rewards

Exact timing and pricing depend on your setup and the banks involved. We explain both up front so you can plan cash flow.

Why invoice size changes the answer

The pricing shapes are what matter. A card fee is charged as a percentage of the whole amount, so a $20,000 invoice costs one hundred times as much to take by card as a $200 invoice. A flat ACH fee is often the same on both. On small invoices the gap is a few dollars and convenience wins. On large invoices the gap can be more than your profit on the job, and that is when ACH earns its place.

Cost is not the only factor, though. A card that is approved on the spot can be worth its fee if it saves you a week of chasing a check or protects you from a new customer who might not pay.

Where ACH makes more sense

ACH shines when the amount is large and the relationship is ongoing. Common examples:

• Large B2B invoices where a percentage card fee would eat into margin.
• Recurring bills such as service contracts, rent, tuition and memberships, with the customer’s authorization on file.
• Customers whose accounts-payable departments prefer bank payments over cards.
• Payment plans, where a steady debit from a bank account is less likely to fail because of an expired card.

The main trade-off is the lack of an instant answer. A card is approved or declined on the spot. An ACH payment can come back days later if the account is closed, the funds aren’t there or the customer says they didn’t authorize it. Clear authorization and correct bank details prevent most of those returns.

Where credit cards make more sense

Cards are hard to beat when speed and convenience matter more than the fee:

• Small and mid-size invoices, where the fee in dollars is modest.
• New customers, where an instant approval protects you before you ship or start work.
• Buyers with purchasing cards who are required to pay suppliers by card.
• Payments taken on the spot, at a counter, on a job site or over the phone.

On commercial cards, sending Level 2 and Level 3 data can bring the card cost down. See Level 2 and Level 3 data and commercial card interchange.

How to offer both without confusing anyone

Offering two methods only helps if customers can find them and your staff can reconcile them. A simple approach:

1. Put both on the invoice. A payment link that offers card and bank payment on the same page is the easiest. See payment links and invoicing.
2. Set a clear policy. For example, ACH preferred above a certain invoice amount, cards welcome below it. Pick the threshold from your own margins.
3. Decide who pays the card fee. You can absorb it, build it into pricing or add a disclosed surcharge on credit cards within card-brand rules, capped at 3% and not on debit or prepaid cards. Some states restrict surcharging, so check current state rules.
4. Get ACH authorization in writing. For repeat debits, keep the customer’s signed or recorded approval on file, per ACH rules.
5. Reconcile in one place. Card and ACH payments should land in the same reporting, ideally posting back to your accounting software.

Many accounts-payable teams have their own rules about how they pay suppliers. Asking your largest customers what they prefer is often the fastest way to decide.

What about paper checks?

Plenty of businesses still pay by check. Checks are slow, need a trip to the bank or a scanner and can bounce. Moving check-paying customers to ACH usually saves time on both sides. If you keep accepting checks, check guarantee and verification services can reduce the risk. See check protection.

What PayZoom does

We set up ACH payments and card processing with the same team, so both show up in clear reporting. We can add QuickBooks invoicing, connect to SAP or QuickBooks, or build on a custom API, and we work with the gateway you already use. For card payments we recommend Interchange-Plus, with our margin on its own line and never increased, in writing. No early termination fees, no non-compliance fees, and a real person answers when you call. Read more on recurring billing or browse all guides.