ACH payments for small businesses: Benefits, risks, and how to get started

ACH is short for Automated Clearing House and is a network that facilitates electronic transfers between bank accounts in the U.S. The National Automated Clearing House Association (Nacha) is responsible for setting the rules and regulations for ACH.

Common use cases for ACH payments include B2B purchases, peer-to-peer (P2P) payments, direct deposits, subscription billing, business payouts, and online bill payments.

ACH credit vs debit

There are two main types of ACH transactions: ACH debits and ACH credits. An ACH debit pulls money from a checking or savings account to pay for a purchase or bill, while an ACH credit pushes money into an account.

For instance, if a customer wants to pay their electric bill online and chooses ACH to pay the recurring bill, this would be a debit. Each time the payment is due, the funds are pulled from the customer's bank account and deposited into the electric company's account.

An example of an ACH credit is an insurance payout. Historically, insurance claims were often paid by check, which could take days or even weeks to arrive and clear. With ACH, insurers can transfer funds directly into a claimant's bank account much more quickly.

When researching ACH payments, you'll likely come across related terms like EFT, eChecks, and wire transfers. These terms are commonly confused with one another, but there are slight distinctions between them.

Electronic funds transfer (EFT) is a blanket term for all digital transactions, including ACH, eChecks, credit and debit cards, mobile wallets, wire transfers, and direct deposits. You can think of EFT as the “umbrella” that covers all the different ways you can move money electronically.

Examples of what wouldn't fall under the EFT umbrella are cash, paper checks, money orders, and traveler's checks.

ACH payments

ACH payments move money electronically between bank accounts and are commonly used for recurring billing, invoices, direct deposits, subscriptions, and other predictable business payments. For many small businesses, they also provide a lower-cost alternative to card payments for higher-value transactions.

eChecks

An eCheck is a type of ACH payment. The main difference is that an eCheck is a digital version of a paper check that’s predominantly used for one-time payments and no banking data is stored.

For example, when someone pays with a check at a grocery store, the cashier runs it through a Check21 machine. The physical check is then converted to an electronic transaction that processes over the ACH rails. That’s why the cashier will hand the paper check back to the customer after they run it through the check reader.

Wire transfers

One of the key differences between wire transfers and ACH is that wires move money directly between banks and third-party agencies, therefore bypassing the Automated Clearing House. Wire transfers can also be used internationally and are typically faster than ACH payments but come with higher costs. Another important distinction is that wires are irrevocable, whereas ACH transfers can be reversed.

Wire transfers run on networks like Fedwire, which is managed by the Federal Reserve Bank, or Clearing House Interbank Payments System (CHIPS), which is a privately owned company.

One of the biggest advantages of ACH is its lower processing costs compared to credit and debit card payments. The trade-off is that ACH transactions typically take longer to process and settle.

Standard ACH payments typically settle within two to five business days, although processing times can vary depending on the financial institutions involved. For example, Finix’s default timeframe for settling ACH direct debits is 5 business days or T+5. This timeline starts at the date of the transaction and ends when the money is added to the seller’s account and provides ample time for payments to clear.

When evaluating payout platforms, small businesses should weigh the benefit of faster access to funds against the increased risk of ACH returns when choosing a settlement schedule. At Finix, you can adjust your ACH schedule to be faster or slower to fit your unique business needs.

Settlement timing is commonly expressed as T + the number of business days it takes for funds to settle. For example, standard ACH at Finix is T+5, while next-day ACH is T+1. Although accelerated funding is available, faster settlement carries a higher risk of payment returns due to issues such as insufficient funds or account closures.

Depending on your provider, you can opt for faster transfers like two-day and same-day ACH, albeit for a higher fee. At Finix, you can adjust your ACH schedule to be faster or slower to fit your unique business needs.

Pro tip:  T + number means transaction date plus the number of days it takes to settle the transaction. Standard ACH is T+5, while next-day ACH is T+1. While accelerated ACH funding is an option, it runs a much higher risk of payment returns due to things like insufficient funds and account closures.

As with any payment method, ACH isn’t without risk. Cybercrimes like account takeovers, vendor impersonation, and ransomware are threats to any organization processing ACH payments. But one of the biggest risks is ACH returns from fraud and payment disputes, as well as the cost of legitimate returns.

It's a common misconception that ACH transactions can result in chargebacks. In reality, chargebacks apply only to card payments. ACH transactions are instead subject to returns.

ACH returns

Most ACH payments process successfully without issue. However, while typical use cases for ACH are low risk, it is harder to successfully dispute ACH returns than to win chargebacks against card payments, even though cards are at higher risk of fraud.

There are more than 80 standardized ACH return codes. with the most common relating to insufficient funds, incorrect account information, and authorization issues. Nacha requires businesses to keep their overall ACH return rate below 15%, as exceeding this threshold can put your business out of compliance.

Nacha also sets separate monitoring thresholds for specific types of ACH returns. For example, unauthorized returns should remain below 0.5%, while administrative returns should remain below 3%.

See our ACH documentation for more codes and details about how to handle ACH. returns.

Cost of returns and ACH disputes

Even for legitimate ACH returns, your business still incurs a fee. The amount varies by provider, but at Finix, ACH returns are a fixed $5 each for Flat Rate and Dynamic pricing. There is also a $15 charge for each dispute. Fees can vary for custom plans. See our pricing page for full details.

Returned payments can become especially costly for businesses processing high-value transactions. Some processors require you to pre-fund accounts if your average ACH transaction is above a certain threshold. On top of that, you’re responsible for return fees and can be out a sizable amount of money, especially if goods or services were delivered.

For this reason, the ACH Network recommends having an established relationship with a buyer before accepting eCheck payments for products. In many ecommerce scenarios, payment methods such as cards, invoices, bill pay, or subscriptions may be more appropriate.

Managing ACH risk

The best way for small businesses to protect themselves from ACH-related cybercrime is to remain in compliance with Nacha rules and regulations and to partner with a payments provider that offers advanced fraud protection and real-time fraud monitoring.

When it comes to chargebacks and friendly fraud, you can minimize risk by allowing more time for ACH settlements. This is the reason Finix’s default funding timeline is five days, as this timeframe provides you with the most protection.

Finix also supports slower and faster ACH processing times, along with the ability to set up security deposits to help reduce the risk for businesses that need faster payouts.

An ACH fee cap limits how much you'll pay in processing fees for a single ACH transaction. Without one, fees can become expensive for large transactions and eat into your margins.

For small businesses that process large invoices or high-ticket payments, fee caps can help keep processing costs predictable. When evaluating a payments provider, ask whether ACH fee caps are supported and how they apply to your pricing plan. Finix supports ACH fee caps, allowing businesses to limit processing costs on larger transactions. The appropriate cap will depend on your typical transaction sizes and should align with your compliance requirements.

For many small businesses, accepting ACH payments is worth considering, especially if you send invoices, offer recurring billing, or process high-value B2B transactions. Because ACH fees are often lower than card processing fees, accepting payments directly from a customer's bank account can help reduce payment costs over time while giving customers another way to pay.

That said, ACH isn't the right fit for every transaction. Card payments are typically better suited to one-time retail purchases where speed and convenience are the priority, while ACH works best for predictable or scheduled payments such as subscriptions, membership fees, recurring invoices, or large purchases where lower processing costs outweigh longer settlement times.

Getting started with ACH doesn't have to be complicated. Finix makes it easy to accept ACH payments alongside credit cards, debit cards, and digital wallets, with options including payment links and virtual terminals that don't require a custom integration. If ACH aligns with the way your business gets paid, adding it can give customers more flexibility while helping you manage payment costs.

Multiple payment options make for better customer experiences

While card payments remain the most popular payment method, offering ACH alongside cards gives customers greater flexibility in how they choose to pay. For businesses that manage recurring billing, invoices, or larger transactions, giving customers the option to pay directly from their bank account can also help reduce processing costs.

Finix makes it easy to accept ACH payments alongside credit cards, debit cards, Apple Pay, Google Pay, and other popular payment methods through a single platform. If ACH is a good fit for your business, you can start accepting bank payments without adding unnecessary complexity to your payment experience.

Ready to accept ACH payments? Learn how Finix can help you add ACH alongside your existing payment methods and start accepting bank payments with confidence.