The ACH payment method explained for contractors: how ACH works, ACH vs card and check, ACH payment processing setup, and invoice wording you can copy.
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The ACH payment method is the cheapest, cleanest way for most contractors to get paid by bank transfer. Money moves straight from your customer's bank account to yours, there is no check to chase in the mail, and the payment can post to your books without anyone retyping it. Yet a lot of contractors still put "check payable to" at the bottom of every invoice and wonder why the money takes three weeks.
I ran three restoration companies for more than 14 years, and the jobs that got paid fastest were the ones where paying was easy. This guide explains what an ACH payment is in plain terms, how it works step by step, how ACH payment processing for contractors gets set up, how ACH compares with card, check and wire, and the exact wording to put on your invoices so homeowners and business customers actually use it. If you want the bigger picture on how payments fit into your receivables, start with our construction accounts receivable guide.
KEY TAKEAWAYS
ACH stands for Automated Clearing House. It is the electronic network banks in the United States use to move money between accounts in batches. The rules for the network are written by Nacha, the organization that governs ACH, and the transactions are processed through two operators: the Federal Reserve's FedACH service and The Clearing House.
A plain ACH payment definition: an ACH payment is an electronic transfer from one bank account to another that runs through that network instead of through card networks, paper checks or the wire system. When your employees get paid by direct deposit, that is ACH. When a homeowner's mortgage auto-pays every month, that is ACH. When a customer pays your invoice from their bank account through a payment link, that is usually ACH too.
You will see it called a few different things: bank transfer, eCheck, direct debit, pay by bank, or payment type ACH on a processor statement. For your purposes they all mean money moving account to account, without a card.
The difference is who starts the payment.
| Type | Who starts it | Contractor example |
|---|---|---|
| ACH credit | The payer tells their bank to push money to you | A property management company pays your invoice through its AP system after you send them your bank details on a vendor form |
| ACH debit | You (or your processor) pull money from the payer's account with their authorization | A homeowner clicks your payment link, enters their bank account and authorizes the payment, or signs up to have a payment plan installment drawn each month |
Commercial customers usually pay by ACH credit, because their AP department controls when money leaves. Homeowners usually pay by ACH debit through a payment link, because it is the fastest way for them to finish the task from their phone.
Say you finish a $12,400 water heater replacement and repipe. You email and text the invoice with a payment link the same afternoon. The homeowner opens it that evening, picks "bank account," logs in to their bank or enters the routing and account number, and authorizes the payment. Your processor submits the ACH debit, the funds settle in your account in a business day or two, and the payment is recorded against the invoice. No check, no deposit run, no "it's in the mail."
Behind the payment link, an ACH debit goes through the same basic path every time:
| 1 | Authorization. The customer agrees to the payment, either by clicking through your payment page or by signing a written authorization for recurring payments. Keep this record. |
| 2 | Origination. Your payment processor or bank (the Originating Depository Financial Institution, or ODFI) packages the payment into a batch file. |
| 3 | Clearing. The batch goes to an ACH operator, FedACH or The Clearing House, which sorts it and sends it to the customer's bank (the Receiving Depository Financial Institution, or RDFI). |
| 4 | Settlement. The customer's bank debits their account and the funds settle to yours. Standard ACH typically settles within one to two business days. |
| 5 | Returns, if any. If the account has insufficient funds, is closed or the payment was not authorized, the customer's bank sends it back with a return code, and your processor reverses the credit. |
Nacha also runs Same Day ACH, which lets eligible payments settle the same business day when they are submitted before the day's cutoff windows. Whether you get same-day settlement depends on your processor and what it charges for it. See Nacha for the current Same Day ACH rules and limits.
You do not need a special merchant account to accept ACH. Most contractors set it up one of four ways:
| Option | How it works | Good fit when |
|---|---|---|
| Your bank's ACH origination | Your business bank lets you originate ACH debits or receive ACH credits directly. Often requires an application and underwriting. | You bill a few large commercial customers who pay on a schedule |
| Your accounting software's payments add-on | Invoices include a pay-by-bank option and payments match to the invoice automatically | You already invoice from QuickBooks Online or similar and want everything in one place |
| A payment processor | A processor gives you a hosted checkout or payment link that accepts ACH and card | You want one payment page for every customer type |
| Receivables follow-up software | Payment links that take card or ACH are built into every reminder email and text, and payments post back to your books | Getting paid is less about accepting ACH and more about getting customers to actually click |
Whatever you pick, check four things before you sign up: how long funds take to land, what a returned payment costs you, whether payments sync to your accounting system against the right invoice, and whether the customer can pay from a phone without creating an account.
Tip: If you use QuickBooks Online, make sure ACH payments are applied to the invoice, not just deposited as income. Our QuickBooks for contractors guide covers how invoices, payments and deposits should line up so your AR aging stays accurate.
Each method has a place. Here is how they compare on the things a contractor actually cares about.
| Method | Speed to your account | Typical cost to you | Can it be reversed? | Best for |
|---|---|---|---|---|
| ACH | About 1 to 2 business days; same day if your processor offers Same Day ACH | Usually low, often a flat fee or a small percentage with a cap | Yes, for returns such as insufficient funds or unauthorized debits | Most invoices, especially larger residential and commercial balances |
| Credit or debit card | Usually 1 to 2 business days | Highest; a percentage of every payment | Yes, through chargebacks | Smaller service invoices, deposits, customers who want card rewards |
| Paper check | Mail time plus deposit time plus a hold | Low fees, high labor (pickups, deposits, posting) | Can bounce, and can be stopped before it clears | Customers who refuse anything else, some insurance and lender payments |
| Wire transfer | Usually same day | Flat fee, often paid by the sender and sometimes the receiver | Very hard to reverse once sent | Very large commercial payments and real estate closings |
On a $300 service call, card is fine and the convenience is worth the fee. On a $25,000 remodel balance, card fees add up fast, and ACH is the better default. A simple rule many contractors use: offer both on every invoice, but lead with bank transfer on anything over a set amount and say so in your terms. If you are thinking about passing card fees to customers, be careful. Surcharging rules vary by state and by card network, so check your state's law and your processor's rules before you add a fee to an invoice.
For a deeper look at which methods to offer and when, see our page on card, ACH and payment plans for contractors.
Bring one overdue invoice.
We will show you how it would be followed up, and what your customer would see when they pay by card or ACH.
ACH payments for business work a little differently than homeowner payments. Commercial customers, general contractors and property managers usually pay through their own AP system on a set schedule, so you will be sending them your bank details rather than a payment link they click. Make it easy for them:
Changing bank details by email is one of the oldest scams in business. A criminal spoofs your email, tells the customer "we changed banks," and the customer sends your payment to the wrong account. The FBI's Internet Crime Complaint Center tracks this as business email compromise. Two habits protect you: tell commercial customers in writing that you will never change bank details by email alone, and if a customer asks you to update theirs for a refund, confirm by calling a number you already have on file.
If the payment instructions on your invoice say "call the office for wire details," most customers will just mail a check. Put a payment link at the top and spell out the options. Here is wording you can copy into your contractor invoice template:
COPY AND EDIT
Homeowner invoice: "Pay online at [payment link] by bank transfer (ACH) or card. Bank transfer has no fee. Payment is due by [date]."
Commercial invoice: "Payment by ACH is preferred. Our bank details are on file with your AP team from our vendor setup form dated [date]. Please include invoice # [number] in the remittance. Payment is due by [date] (Net [X])."
Security note: "[Company] will never change its bank details by email. If you receive a request to send payment to a new account, call us at [number on file] before paying."
Recurring or payment plan: "By signing below, you authorize [Company] to debit [amount] from the account ending in [last 4] on the [day] of each month until the balance of [amount] is paid. You may cancel this authorization by notifying us in writing."
Keep the authorization language for recurring ACH debits in writing and store it with the customer record. If a payment is ever disputed, that authorization is what your processor will ask for.
Offering ACH is not the hard part. Getting the customer to click is. A few things move the needle:
| 1 | Send the link the day the work is done. The customer is happiest with you the day the job finishes. Email and text the invoice with a payment link before you leave the driveway if you can. |
| 2 | Make it work on a phone. Most homeowners will open your text before your email. If the payment page needs a login or a laptop, they will put it off. |
| 3 | Put the link in every reminder. Every follow-up, from the friendly heads-up to the final notice, should carry the same link. Our payment reminder email templates show where it goes. |
| 4 | Offer a payment plan before it goes bad. If a homeowner cannot pay a large balance at once, a written plan with automatic ACH installments beats an invoice that sits at 90 days. |
| 5 | Follow up on a schedule, not when you remember. Most late invoices are not refusals. They are forgotten. Automated payment reminders keep the link in front of the customer until it is paid. |
If you do roofing or restoration work, carriers pay through their own claim payment process, usually by check or their own electronic payment system. Send adjusters and carriers documentation and status requests, never a payment link. Use ACH payment links for the part the homeowner owes, such as the deductible or upgrades they chose.
AR Workflow is receivables follow-up that runs on top of QuickBooks Online. It is not accounting software and it does not replace your bank or your books. It syncs your open invoices, puts each one on a follow-up schedule, and sends emails, two-way texts and ringless voicemails from a dedicated number, each with a card or ACH payment link. Customers can pay in full or on a payment plan, and payments post back to QuickBooks against the right invoice. It stops when the invoice is paid and pauses when a customer promises a date. See how it works with QuickBooks Online collections, or look at pricing.
ACH is an electronic bank-to-bank payment that runs through the Automated Clearing House network, governed by Nacha. Instead of a card or a paper check, money moves directly from the payer's bank account to yours, usually in one to two business days.
Standard ACH payments usually settle in one to two business days. Same Day ACH can settle the same business day if your processor supports it and the payment is submitted before the cutoff. Your processor may also hold new merchants' funds a little longer at first.
In most ways, yes. There is no paper check to be lost, stolen or altered, and the payment is tied to the invoice electronically. The main risk is fraud around changing bank details, so confirm any change by phone using a number you already have.
An ACH debit can be returned if the account has insufficient funds, is closed, or the customer says they did not authorize it. Consumer accounts generally have longer to report an unauthorized debit than business accounts, under Nacha rules and the CFPB's Regulation E. Written authorization is your best protection.
Usually, yes. "eCheck" is a common name for an ACH debit started from a checking account. The customer enters their routing and account number, or logs in to their bank, and the payment runs over the ACH network.
Some do, to steer customers toward ACH. Surcharge and convenience fee rules vary by state and by card network, so check your state's law and your processor's terms first, and put any fee in your contract before it appears on an invoice.
Related reading
Your invoice, not a feature tour.
Bring one overdue invoice to a demo and see what AR Workflow would send, when, and how your customer would pay by card or ACH.
This article is general information, not legal or banking advice. ACH rules are set by Nacha and your processor; surcharge and consumer payment rules vary by state. Talk to your bank, processor or an attorney about your situation.
Sam owned and ran three restoration companies for more than 14 years and collected over $100 million in receivables. He built AR Workflow in 2020 to give contractors the collections system he wished he'd had.
AI writes the emails, sends the texts, and leaves the voicemails. Your team handles the conversations that matter, and your cash keeps moving.
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