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ACH Transactions: What Small Business Owners Need to Know

ACH is the U.S. electronic network that moves money directly between bank accounts. It handles payroll, vendor bills, subscriptions and many loan payments. It costs less than cards, but it is slower and has its own rules on timing, authorization and returns.

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What ACH is and how it works

ACH, the Automated Clearing House network, processes electronic bank-to-bank transfers in batches rather than one by one.

When you send or collect an ACH payment, your bank or payment provider bundles it with others and sends it through the network. The receiving bank then posts the funds. Nacha, the organization that manages the network rules, sets the standards that banks follow.

ACH can push money (a credit, such as paying a vendor) or pull it (a debit, such as collecting rent or a subscription fee with permission).

Common business uses

Small businesses use ACH for payroll, vendor payments, recurring customer billing, tax payments and loan or financing payments.

  • Payroll. Direct deposit to employees.
  • Accounts payable. Paying suppliers without checks.
  • Recurring billing. Memberships, retainers and service contracts.
  • Tax payments. Federal and state tax deposits.
  • Financing payments. Many funders collect payments by ACH debit from your business account.

Compare payment methods in small business payment options.

Timing: how fast does ACH settle

Standard ACH typically takes one to three business days. Some banks and providers offer same-day ACH for an extra fee or within cutoffs.

Weekends and holidays do not count as business days, so a Friday payment may not post until Tuesday. Cutoff times matter too. Ask your bank for its deadlines for same-day processing.

If you rely on incoming ACH to cover bills, build in a buffer. A sale made Thursday may not be spendable cash until the following week. See cash flow vs. profit.

What ACH costs

ACH is usually cheaper than card processing, often a small flat fee or a low percentage. Banks and providers set their own pricing.

Many providers charge a flat fee per transaction or a small percentage with a cap. For larger invoices, that can save a lot compared with card fees. For example, on an illustrative $5,000 invoice, a 3% card fee is $150, while a flat ACH fee might be a few dollars. Confirm current pricing with your bank or processor. See also accepting credit card payments.

Risks: returns, authorization and fraud

ACH payments can be returned for insufficient funds, closed accounts or unauthorized debits. Get clear written authorization to debit any account.

A debit can bounce days after you think you were paid. Returns may come with fees. To reduce risk:

  • Get a signed or recorded authorization before debiting a customer.
  • Verify account details with a small test or a verification service.
  • Confirm bank details by phone before changing vendor payment instructions, since fake payment-change requests are a common scam.
  • Keep records of authorizations.

Managing your own ACH debits

If a funder or vendor debits your account on a schedule, keep enough in the account on each debit date and know your options if cash gets tight.

Overdrafts and returned debits cost fees and can harm vendor relationships. Calendar your debit dates and set an alert for a minimum balance. If you receive financing with fixed daily or weekly payments, convert them into a monthly figure using daily payment to monthly equivalent and test them with stress test payments.

ACH and business funding

Many financing products are repaid by ACH, so know the schedule, amount and how to stop or change a debit before you sign.

ROI Funder shows the payment structure before you decide: true cost, payback period and monthly-equivalent payments. We consider 500+ FICO, 6+ months in business and $20,000+ monthly revenue. See term loans and working capital, or start an application with a soft credit pull.

Frequently asked questions

How long does an ACH payment take?

Typically one to three business days. Same-day ACH is available at many banks within cutoff times.

Is ACH cheaper than cards?

Usually yes. ACH commonly costs a flat fee or a low percentage, but it settles more slowly.

Can an ACH payment be reversed?

Yes. Payments can be returned for insufficient funds, closed accounts or lack of authorization.

Do I need permission to debit a customer?

Yes. You need written or recorded authorization before pulling money from a customer's bank account.