How long does ACH take?

Standard ACH is typically one to two business days. Same-day ACH is available at a higher per-transaction fee if submitted before the cut-off.

Can an ACH payment be reversed?

Yes, within the return window. Unauthorized-return codes carry a longer window than insufficient-funds returns, which is why authorization records matter.

ACH

Is ACH cheaper than a credit card for B2B invoices?

Short answer

On large invoices, almost always. ACH is priced as a flat fee per transaction and a card as a percentage of the invoice, so the gap widens with every dollar. The fee on a $50,000 ACH payment is identical to the fee on a $500 one, while the card cost scales throughout. On small invoices the two can be comparable, and the crossover point depends on your specific pricing.

Written by: B2B Pay Hub editorial team
Reviewed: Reviewed by a B2B Pay Hub payments specialist
Published: September 30, 2026
Updated: September 30, 2026

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The fuller explanation

The trade-offs are timing and returns. Standard ACH settles in one to two business days rather than authorizing instantly, and a payment can be returned after you have treated it as received.

That return risk is why ACH suits established trade accounts better than first-time buyers. A common approach is card or prepayment on a first order and ACH once a relationship exists.

The practical answer for most B2B sellers is not to choose one rail but to steer: make ACH attractive with an early-pay discount smaller than the interchange you would otherwise pay, and make sure the card volume that remains qualifies at Level 3.

Important caveats

ACH requires a retrievable authorization from the customer before you debit. A verbal agreement noted in a CRM does not meet that standard.
Some AP departments genuinely cannot pay by ACH. Fighting that costs more in relationship than it saves in fees.

Other ways people ask this

These phrasings share the same answer, so they live on this page rather than on duplicate URLs.

Should we use ACH instead of cards?
ACH vs credit card cost
Is ACH cheaper for large invoices?

Follow-up questions

How long does ACH take?: Standard ACH is typically one to two business days. Same-day ACH is available at a higher per-transaction fee if submitted before the cut-off.
Can an ACH payment be reversed?: Yes, within the return window. Unauthorized-return codes carry a longer window than insufficient-funds returns, which is why authorization records matter.

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Where this fits

Guidelevel 3 processing guideLevel 3 is not a product anyone sells you. It is a data standard your transactions either meet or fail, silently, on every commercial card payment you take.Open QuestionLevel 3 data explainedLevel 3 processing is the transmission of detailed line-item data alongside a commercial card transaction so it qualifies for the lowest interchange rate the card networks offer. It requires product codes, item descriptions, quantities, unit prices, freight and duty on top of the Level 2 requirements of sales tax and a purchase order reference. It applies only to commercial, corporate, purchasing and government cards, because consumer cards have no Level 3 category.Open Resourcethe fields required for Level 3 qualificationEvery field Visa and Mastercard require for Level 2 and Level 3 qualification, grouped by where the data lives on your side, so you can check whether your systems can actually send it.Open QuestionWhy doesn't our virtual terminal qualifyGenerally no. A standalone virtual terminal has no connection to your invoice lines, so it cannot transmit the product codes, quantities, unit prices and freight amounts Level 3 requires. Some gateways offer an enhanced-data entry screen where a user types line items manually, which does qualify, but it doubles data entry and degrades the moment somebody is busy. The durable answer is a connector that reads the invoice directly from your ERP.Open QuestionWhy do credit card transactions downgradeA transaction downgrades when it fails to meet the requirements of the interchange category it would otherwise qualify for and settles at a more expensive one instead. Common causes are missing line-item or Level 2 data, freight billed on a separate invoice, settlement outside the required window, a missing purchase order reference, and sales tax left blank rather than flagged exempt. A downgrade produces no error and no alert: the payment succeeds normally and simply costs more.Open Resourceour comparison tableWhich rail is cheaper at which invoice size, what each one costs in practice, and where the answer flips. Percentage pricing and flat fees cross over at a point specific to your business.Open

Find out what your card volume actually costs

Send three months of statements and one representative invoice. You get back a line-item breakdown of what is downgrading and what it costs annually, whether or not you do anything with it.

Request an interchange audit