How Flux helps you accept ACH for invoices

Why we think you should accept ACH for invoices

When a business asks how to make getting paid cheaper and cleaner, one of our first questions is whether they accept ACH for invoices yet. For large, recurring, business-to-business payments, bank transfers are frequently the method both the payer and the payee prefer, and they avoid some of the friction that comes with card acceptance. Our approach starts by matching the method to the invoice.

This is not about replacing cards. It is about giving the buyer a sensible choice and giving the seller the right rail for each kind of payment.

How ACH fits alongside cards and stablecoins

We built Flux to accept cards, ACH, and stablecoins in one platform, so an invoice can carry more than one way to pay. The buyer decides. Someone who wants card rewards uses a card, someone paying a five-figure invoice from a corporate account uses ACH, and someone who prefers stablecoins pays to your wallet.

Keeping all three behind one integration is deliberate. We would rather you manage one system than stitch together separate tools for each rail.

What does settlement look like?

Timing is part of the decision, so we are direct about it. ACH settles in 1-3 business days. Cards settle in 1-2 business days. Stablecoins arrives in your wallet instantly. None of these are promises of same-hour money for bank rails; they are realistic windows so you can plan cash flow honestly.

For recurring invoices, that predictability matters more than shaving a day. Knowing when money lands lets you schedule your own payables with confidence.

Keeping ACH secure and low-effort

Bank details deserve the same care as card numbers. Our approach uses tokenization so sensitive information is stored as tokens, not raw account data, and hosted fields so the data is captured off your servers. Flux is SAQ-D Level 2 PCI DSS certified for card data, and we apply the same off-your-infrastructure philosophy across the platform.

On the operations side, webhooks tell your systems when an ACH payment succeeds, fails, or is returned, so you are not refreshing a dashboard to find out.

Reconciliation and the books

Accepting ACH is only useful if the payment finds its way to the right invoice in your accounting system. That is why we integrate with QuickBooks to sync transactions to the books. The goal is fewer hours spent matching deposits by hand and fewer reconciliation errors at month end.

We treat reconciliation as part of the payment, not a separate chore, because in B2B the admin time is a real cost.

How to start

If accepting ACH on your invoices sounds right, the practical next step is to look at your invoice mix and decide where ACH should be the default and where cards still make sense. We are happy to walk through it.

Reach us at sales@fluxpayments.com or (813) 402-8244, or apply at /apply.html. Card pricing is a flat 2.9% plus 30 cents per transaction, with volume-based options and no setup fees, monthly fees, minimums, or contracts.