What Are ACH Payments? How They Work, Fees & Timing

ACH payments are electronic transfers of money between bank or credit union accounts through the Automated Clearing House (ACH) Network. Businesses use ACH payments to collect invoices, process recurring bills, send payroll deposits, pay vendors, and receive payments without using traditional credit card networks.

For small business owners, ACH can be a convenient and potentially cost-effective way to accept payments. It is particularly useful for recurring transactions, larger invoices, and established business relationships.

But there is more to ACH than simply moving money from one bank account to another. Processing fees, settlement timing, customer authorization, returned payments, and security requirements all affect whether it makes sense for your business.

I’ve worked with business owners in the merchant services industry since we founded Valued Merchant Services in 2006. Over the years, I’ve seen businesses benefit from adding ACH payments, but I’ve also seen why the lowest advertised transaction fee doesn’t always make a payment method the best choice.

Sometimes ACH is the right solution. Sometimes accepting credit cards is more practical. Often, giving customers more than one way to pay makes the most sense.

In this guide, I’ll explain how ACH payments work, how long they take, what they cost, the risks business owners should understand, and how to decide whether to offer them.

What Are ACH Payments?

ACH stands for Automated Clearing House, the electronic payment network used to move funds between participating financial institutions in the United States.

Rather than processing through Visa, Mastercard, or another card network, ACH payments use bank-account information and established clearing and settlement procedures.

The ACH Network is governed by Nacha, the organization responsible for developing and administering its operating rules. Two ACH Operators, the Federal Reserve and The Clearing House, handle the processing and distribution of ACH entries between participating financial institutions.

Common ACH transactions include:

• Direct deposits of employee wages
• Monthly utility and subscription payments
• Business-to-business invoice payments
• Electronic vendor and supplier payments
• Authorized customer payments for professional services
• Government benefits and tax refunds
• Transfers between eligible financial accounts

Although these payments serve different purposes, they can use the same underlying payment network.

According to Nacha’s ACH Network statistics, the network processed approximately 35.2 billion payments totaling $93 trillion in 2025.

That makes ACH one of the most widely used payment systems in the United States. Its popularity, however, does not mean every ACH transaction is immediate, guaranteed, or appropriate for every business.

ACH Credits vs. ACH Debits: What’s the Difference?

There are two primary types of ACH payments: credits and debits.

The important difference is whether the originating party is sending funds or requesting an authorized collection from another account.

ACH Credits: Sending Money

An ACH credit moves money into a receiving account at the direction of the payer.

For example, when a business sends payroll through direct deposit, the employer originates ACH credits that deposit wages into employees’ accounts.

Other examples include paying suppliers, sending reimbursements, and transferring funds to another eligible account.

ACH Debits: Collecting Money

An ACH debit is used when an authorized party initiates a collection from the payer’s bank account.

Imagine a commercial cleaning company that bills a customer $450 every month. With the appropriate authorization, the company can initiate an ACH debit to collect the scheduled payment.

That payment moves through the ACH Network, allowing the company to collect the invoice without requiring a new credit card transaction each month.

For most merchants interested in accepting ACH payments from customers, ACH debits are the primary payment type to understand.

ACH Credit vs. ACH Debit Comparison

How Do ACH Payments Work?

ACH payments involve the party originating the transaction, financial institutions, an ACH Operator, and the party receiving the payment instruction.

For a small business collecting an authorized ACH debit, the process generally involves five steps.

Step 1: The Customer Authorizes the Payment

Before a business initiates an ACH debit, it must obtain authorization that meets the applicable requirements.

Depending on the transaction and provider, authorization may be collected through an appropriately authenticated online payment form, a signed agreement, or another permitted method.

For example, an accounting firm might offer its clients an online invoice with a secure bank-payment option. The client reviews the amount and authorizes the payment through the provider’s approved process.

Step 2: The Payment Instructions Are Submitted

The business or its payment service provider submits the relevant payment instructions to the originating financial institution.

This bank is known as the Originating Depository Financial Institution (ODFI).

Step 3: The ACH Operator Processes the Entry

The ODFI submits the entry through an ACH Operator.

The operator sorts and distributes entries to the appropriate receiving financial institutions.

Step 4: The Receiving Bank Processes the Payment

The customer’s bank or credit union, known as the Receiving Depository Financial Institution (RDFI), receives the entry and processes the account debit according to the applicable rules.

Step 5: Settlement and Merchant Funding Occur

Settlement occurs through the ACH Network according to the applicable banking-day schedule.

The merchant’s payment provider may then release the proceeds under its own funding arrangements.

These are related but different events. The ACH entry can settle before the merchant receives or can use the funds.

For a more technical explanation of the process, see Nacha’s guide to how ACH payments work.

How Long Do ACH Payments Take?

ACH payment timing is often misunderstood because businesses may be referring to three different things: when a payment is submitted, when it settles through the ACH Network, and when the merchant can use the money.

These stages do not always occur at the same time.

Standard ACH Processing

According to Nacha, approximately 80% of ACH payments settle within one banking day or less.

ACH credits can generally be scheduled for same-day, next-banking-day, or two-banking-day settlement, depending on the arrangement.

ACH debits generally settle on the same banking day or the following banking day.

However, your payment provider may have additional processing deadlines, risk reviews, or funding policies that affect when money becomes available to your business.

Same Day ACH Payments

Same Day ACH allows eligible ACH payments to settle on the same banking day when they are submitted within the required processing windows.

That can be valuable when businesses need a faster electronic bank-payment option.

However, Same Day ACH is not the same as an instant payment. It still follows scheduled processing windows and banking-day requirements.

As of October 2026, the Same Day ACH limit is $1 million per eligible payment. Nacha has approved an increase to $10 million per payment effective September 17, 2027.

Businesses should confirm the current transaction limits, availability, and service charges with their payment provider.

Additional details are available in Nacha’s Same Day ACH limit announcement.

Do ACH Payments Process on Weekends and Holidays?

ACH Network settlement does not currently take place on weekends or federal holidays.

A customer may be able to submit a payment through an online portal on Saturday or Sunday, but the actual ACH settlement follows the applicable banking-day schedule.

For example, an invoice payment authorized late on Friday may not be submitted or settled until a subsequent banking day, depending on the provider’s processing cutoff.

The exact timeline should be confirmed with the service provider rather than assumed.

ACH Settlement vs. Merchant Funding

This distinction is especially important for businesses that depend on predictable cash flow.

Consider a contractor collecting a $5,000 invoice by ACH.

The ACH transaction might settle according to the network’s standard schedule. However, the provider may hold the proceeds until its own funding conditions are satisfied.

New accounts, unusually large transactions, certain business categories, and other risk factors can affect funding arrangements.

Before relying on ACH for business cash flow, ask:

• When will the ACH transaction be submitted?
• When is network settlement expected?
• When will the money be available in my business bank account?
• Are there any holds, reserves, or delayed-funding conditions?
• What happens if the payment is subsequently returned?

Getting clear answers to these questions is more useful than relying on a general promise of fast ACH funding.

How Much Do ACH Payments Cost?

ACH payment processing can cost less than credit card processing in certain situations, particularly with larger transactions or recurring billing.

However, there is no single ACH fee structure that applies to every business.

Providers may charge a flat transaction fee, a percentage of the payment amount, or a percentage subject to a maximum charge.

Common ACH Processing Fees

Depending on the provider and agreement, potential charges include:

• Per-transaction processing fees
• Percentage-based transaction charges
• Monthly platform or account fees
• Bank account verification fees
• Same Day ACH processing fees
• Returned transaction fees
• Software or gateway integration costs
• Setup or account maintenance charges

Not every provider charges every type of fee.

The best comparison looks at your total expected cost, not just the advertised price of one transaction.

ACH vs. Credit Card Processing: A $1,000 Example

Let’s compare two hypothetical payment arrangements for a $1,000 customer invoice.

Under those assumptions, ACH would have a lower transaction fee.

But the decision should not stop there.

If the business must wait longer for funding, experiences a returned payment, or incurs additional account charges, the overall economics may change.

That is why I encourage merchants to evaluate processing costs alongside funding reliability, customer convenience, and return exposure.

ACH vs. Credit Cards vs. Wire Transfers

ACH payments, credit cards, and wire transfers can all move money, but they are designed for different transactions and customer needs.

ACH also differs from newer U.S. instant payment systems, including FedNow and the RTP network. Those networks use different settlement arrangements and may offer real-time availability for eligible payments.

A provider advertising fast bank transfers is not necessarily offering Same Day ACH. Ask which payment network is being used and what the merchant’s actual funding schedule will be.

If your business also needs to accept debit or credit cards, our guide to accepting credit card payments explains the equipment, software, processing arrangements, and costs involved.

Benefits and Risks of ACH Payments for Small Businesses

ACH can be a useful payment option, but it works best when its advantages align with your business model.

Potential Benefits of ACH Processing

• Lower transaction costs in some situations. ACH may offer savings for larger invoices and recurring payments, depending on the provider’s pricing.
• Convenient recurring billing. Properly authorized ACH debits can support scheduled customer payments without requiring a new manual transaction each time.
• Reduced dependence on paper checks. Electronic collections can limit manual handling, deposits, and certain reconciliation tasks.
• Another way for customers to pay. Some customers prefer bank-account payments, especially for substantial invoices or ongoing business relationships.
• Useful business-to-business workflows. ACH can support routine supplier payments, professional services invoices, and other established payment arrangements.

Limitations and Risks to Understand

• Payments can be returned. Insufficient funds, account errors, and unauthorized transactions may cause a payment to be reversed through the applicable ACH return process.
• Settlement is not always immediate. Banking-day schedules and provider funding policies matter.
• Authorization requirements must be followed. Businesses cannot simply debit an account without appropriate permission.
• Bank information requires protection. Sensitive account details should be collected and handled through suitable security procedures.
• Some customers prefer cards. Credit card rewards, convenience, and other consumer preferences can influence payment selection.

Can an ACH Payment Be Returned After Settlement?

Yes. A settled ACH debit can still be returned under applicable rules.

Some administrative returns, such as insufficient funds or account errors, generally occur early in the payment lifecycle.

Unauthorized transactions are different.

For certain unauthorized consumer ACH debits, Nacha’s return procedures generally allow the receiving financial institution to return an entry during a period extending through the 60th calendar day following settlement, subject to the applicable requirements.

Non-consumer accounts generally have different and often shorter standard return deadlines.

The precise rights, deadlines, and remedies depend on the circumstances and governing rules.

For additional details, see Nacha’s guidance on ACH unauthorized debit returns and warranty claims.

This distinction is especially important for merchants delivering high-value products or completing services immediately after payment.

A transaction appearing successful in a payment dashboard should not automatically be treated as a guarantee that the business will retain the funds.

ACH Authorization, Security, and Fraud Prevention

ACH is an established payment network, but businesses still have responsibilities related to authorization, customer information, recordkeeping, and fraud monitoring.

What Authorization Is Required for ACH Debits?

Before originating an ACH debit, the business must obtain authorization that meets the applicable rules for the transaction.

For recurring customer collections, the authorization process should clearly communicate relevant information, including:

• The business collecting the payment
• The payment amount or how the amount will be determined
• The payment frequency and expected timing
• The account or approved payment method being used
• How the customer can revoke authorization
• Any notices required when payment terms change

The exact requirements depend on the type of ACH entry, payment channel, customer account, and applicable rules.

For covered consumer preauthorized electronic fund transfers, federal Regulation E includes authorization and stop-payment protections.

For example, consumers can generally notify their financial institution to stop a covered preauthorized transfer at least three business days before the scheduled payment.

The Consumer Financial Protection Bureau’s Regulation E guidance explains these requirements.

Verify Account Information

Businesses collecting ACH payments need reliable procedures for obtaining and validating banking information.

For applicable first-use consumer bank accounts involved in online-authorized ACH debits, Nacha requires account validation as part of a commercially reasonable fraud detection system.

Permitted approaches may include micro-entry verification, prenotification, or commercial account validation services, depending on the circumstances.

Account validation can help identify certain problems, but it does not guarantee that a transaction is authorized or that sufficient funds will be available.

See Nacha’s Account Validation Resource Center for further explanation.

Understand the 2026 Nacha Fraud Monitoring Requirements

Nacha expanded risk-based fraud monitoring requirements during 2026.

The first phase became effective March 20, 2026. The second phase had a stated effective date of June 19, with June 22, 2026 serving as the practical implementation date because June 19 was a federal holiday.

The changes address applicable financial institutions, non-consumer ACH originators, third-party senders, and third-party service providers, with requirements depending on their specific roles.

The objective is to improve identification of potentially fraudulent ACH entries, including payments initiated under false pretenses.

These rules do not mean that every small business must purchase the same fraud detection product. They establish risk-based responsibilities that should be evaluated with the relevant bank or ACH provider.

Additional guidance is available in Nacha’s fraud monitoring resources.

Protect Against Fraudulent Changes to Payment Instructions

One practical risk for businesses is payment instruction fraud.

For example, someone impersonating a supplier might send an email claiming the supplier has changed banks and asking that future payments be directed to a new account.

If the company accepts those instructions without independent verification, it may send money to an account controlled by a fraudster.

Before updating vendor payment details, verify the request using a trusted phone number or another established communication channel.

Businesses should also limit access to banking information, use appropriate payment platforms, monitor unusual transactions, and train employees to recognize suspicious requests.

What Is the Difference Between ACH and an eCheck?

The terms ACH and eCheck are sometimes used together, but they do not necessarily describe identical services.

An eCheck is commonly marketed as an electronic alternative to a paper check. Many eCheck payment services use ACH debits to collect the funds.

However, different check-processing products may have different authorization, verification, conversion, funding, and return procedures.

A service might accept an authorized bank-account payment entered through an online checkout, while another might use information obtained from an eligible paper check.

Those payment workflows may involve different requirements.

Before choosing a service, ask:

• Does the payment actually move through the ACH Network?
• How does the customer authorize the transaction?
• Are there account verification or guarantee features?
• What happens when a payment is returned?
• When will the merchant receive the funds?

Do not assume that a product described as check processing or eCheck processing provides a payment guarantee.

Which Businesses Benefit Most From ACH Payments?

ACH can work well for businesses with established customer relationships, invoice-driven operations, or authorized recurring billing.

Here are several examples of where it may fit.

Contractors and Home Service Businesses

A plumbing, HVAC, remodeling, or other service company may collect large invoices after work has been completed.

Offering eligible ACH payments alongside credit cards can give customers another way to settle those invoices.

Consider a contractor collecting a $6,000 balance after completing a project. ACH might offer lower processing fees than a card under certain pricing arrangements.

However, the contractor should also evaluate funding timing, payment authorization, and the possibility of returns before treating the job as fully paid.

For businesses that depend on immediate access to funds, the timing question may matter as much as the transaction fee.

Professional Services and Accounting Firms

Accountants, consultants, and other professional service providers often send recurring or periodic invoices to established clients.

An appropriate ACH integration may support electronic invoicing, scheduled collections, and easier reconciliation.

For example, an accounting firm billing a business client monthly might offer an authorized bank-payment option within its invoice system.

That can reduce the need to mail checks or manually request payment each month.

Property Management and Recurring Billing Businesses

Eligible property managers and recurring-service businesses may use ACH for authorized scheduled collections.

Appropriate workflows should clearly explain the payment amount, due date, cancellation or revocation process, and applicable fees.

Software compatibility and relevant legal requirements also need to be considered.

The fact that ACH supports recurring payments does not automatically make every recurring billing arrangement compliant or appropriate.

Business-to-Business Suppliers

Businesses that regularly pay or collect money from suppliers, wholesalers, and other companies may benefit from ACH payment arrangements.

For example, a distributor might offer an established commercial customer a bank-payment option for recurring invoices.

The value could come from transaction cost savings, predictable processes, and reduced manual handling.

However, business-to-business transactions can have different authorization and return considerations from consumer payments.

Membership and Subscription Businesses

Some membership programs and service subscriptions can use ACH for recurring collections.

Appropriate authorization, transparent billing, accurate records, and reliable cancellation procedures are especially important.

The convenience of automated collections should never replace clear communication with customers.

How Can a Small Business Start Accepting ACH Payments?

Getting started with ACH generally requires choosing a suitable provider, completing the applicable approval process, establishing the correct authorization procedures, and configuring the payment tools your business will use.

Step 1: Identify What You Need ACH to Do

Determine whether your business needs to collect invoices, manage recurring customer payments, pay vendors, or support another specific workflow.

This helps establish whether you need ACH debits, ACH credits, or both.

Step 2: Compare Available Providers

Look beyond the advertised transaction fee.

Evaluate payment eligibility, integration support, processing costs, funding timelines, returns, security procedures, reporting, and customer support.

Also determine whether ACH is available through your existing payment provider or requires another account or agreement.

Step 3: Complete the Application and Verification Process

Depending on the provider, you may need business registration details, identification information, bank account verification, expected transaction volumes, and other underwriting documentation.

Our merchant account requirements guide explains common documentation requested when businesses establish payment-processing services.

ACH-specific requirements may differ from those for traditional credit card processing.

Step 4: Establish Customer Authorization and Security

Set up the appropriate authorization forms or digital workflows.

Confirm how your provider handles bank account validation, authorization records, returned transactions, and recurring payment cancellations.

Step 5: Connect Your Payment Software

Depending on the selected provider, ACH may be available through:

• Online payment portals
• Electronic invoices
• Virtual terminals
• Compatible payment gateways
• Supported recurring billing systems
• Other approved business software integrations

Verify compatibility with the software your business already uses before committing to a new system.

Step 6: Test, Reconcile, and Monitor Transactions

Follow the provider’s approved testing procedures before accepting live payments.

Make sure employees understand how to confirm payment status, reconcile deposits, identify returned transactions, and respond to customer questions.

Once processing begins, review transaction reports and exceptions regularly.

Accepting ACH successfully requires an ongoing process for managing payments, not simply activating a feature in your software.

Do You Need a Merchant Account to Accept ACH Payments?

Not necessarily in the same sense as a traditional credit card merchant account.

ACH services may be available through banks, dedicated payment providers, ACH processing companies, and certain business software platforms.

Some businesses use the same provider for credit cards and ACH. Others maintain separate arrangements.

Both approaches can work, depending on the business’s needs.

What matters is understanding the approval requirements, transaction costs, funding schedule, integration options, and support available under the agreement.

How Valued Merchant Services Helps Businesses Evaluate ACH Payments

At Valued Merchant Services, we help business owners evaluate payment solutions based on how they actually operate.

Our services include access to eligible check and ACH payment solutions alongside traditional credit card processing and other business payment technology.

That means we can help merchants explore whether ACH makes sense for larger invoices, recurring billing, eligible check-based transactions, or compatible online payment systems.

Depending on the selected provider and business qualifications, available services may include ACH payment acceptance, check-related processing, recurring collections, and supported software integrations.

We believe the right recommendation starts with understanding the merchant’s current setup.

If a business already has a reliable ACH arrangement with reasonable costs, we may recommend keeping it.

If another arrangement offers a meaningful operational advantage, we can help explain the available options and tradeoffs.

Since 2006, that approach has been central to how we work with business owners: people before profits, and clear answers before recommending a switch.

Frequently Asked Questions About ACH Payments

1. What does ACH stand for?

ACH stands for Automated Clearing House. It is the U.S. electronic payment network used for transactions such as direct deposit, recurring bills, vendor payments, and authorized bank-account transfers.

2. How long does an ACH payment take?

Most ACH payments settle within one banking day or less, according to Nacha. Eligible Same Day ACH payments may settle on the same banking day when submitted before the applicable cutoff. The date funds become available to a merchant may differ from network settlement.

3. Do ACH payments work on weekends?

Customers may be able to initiate payment instructions online over the weekend, but ACH Network settlement does not currently occur on weekends or federal holidays. Settlement follows the applicable banking-day schedule.

4. Are ACH payments cheaper than credit cards?

They can be, especially for certain larger invoices or recurring payments. Actual savings depend on transaction amounts, pricing, monthly charges, returned payments, and the provider’s agreement. ACH is not automatically the lowest-cost option in every situation.

5. Can an ACH payment be reversed after it settles?

Yes. ACH transactions are subject to applicable return and other rules. For example, insufficient funds, invalid account information, or unauthorized debits may result in a return. The permitted timing and procedures depend on the reason and account type.

6. Is ACH the same as an eCheck?

Many eCheck services use the ACH Network to collect payments, but the terms are not always interchangeable. The exact authorization process, payment workflow, fees, and return procedures depend on the provider.

7. Can a business use ACH for recurring payments?

Yes. Eligible ACH debit arrangements can support recurring invoices, memberships, and other scheduled collections. Businesses must obtain appropriate authorization and follow applicable notification, recordkeeping, cancellation, and return requirements.

8. Do customers need to provide bank account information?

ACH processing requires sufficient banking information to identify the proper account, but the method of collecting that information varies. Some providers offer secure account verification or linking tools rather than requiring employees to handle account details manually.

9. Does Valued Merchant Services offer ACH processing?

Yes. Valued Merchant Services offers access to eligible check and ACH payment solutions. Available payment features, fees, approvals, funding schedules, and integrations depend on the selected provider and business qualifications.

Final Thoughts: Is ACH Right for Your Business?

ACH payments are an important part of how businesses and consumers move money in the United States.

They can support payroll, electronic invoices, recurring payments, vendor transactions, and many other banking activities.

For some merchants, ACH offers a practical way to reduce transaction expenses and simplify certain payment workflows.

But accepting ACH payments also introduces responsibilities. Merchants need to understand authorization, settlement timing, returned transactions, security, customer preferences, and the actual cost of their processing arrangement.

My advice is to evaluate ACH as part of your overall payment strategy rather than treating it as a universal replacement for credit cards.

I’ve spent years helping business owners understand their payment options, and the same principle continues to apply: a useful solution should make running the business easier and more predictable.

Sometimes that means ACH. Sometimes it means credit cards. Frequently, a combination of appropriate payment methods gives both the business and its customers more flexibility.

The best payment solution is not simply the one with the lowest advertised fee. It is the one that fits your customers, supports your operations, and makes financial sense when the complete costs and risks are considered.

Sources and Additional Reading

For business owners who want to explore ACH processing rules and current network information in more detail, the following primary sources are useful:

• Nacha: How ACH Payments Work
• Nacha: ACH Network Volume and Value Statistics
• Nacha: Same Day ACH Dollar Limit Changes
• Nacha: Operating Rule Changes and Effective Dates
• Nacha: Account Validation Resource Center
• Consumer Financial Protection Bureau: Regulation E, Preauthorized Transfers

Educational information only. ACH Network rules, financial institution requirements, consumer protections, processing fees, provider policies, and settlement arrangements may change. Businesses should confirm their specific obligations and payment terms with the appropriate ACH provider, financial institution, or qualified professional.