An ACH payment is an electronic transfer of money from one bank account to another, processed through the Automated Clearing House network

ACH stands for Automated Clearing House, a system that moves money between U.S. bank accounts without using checks, wire transfers, or credit cards. When you set up an automatic mortgage payment, pay a bill online, or receive a direct deposit paycheck, that's an ACH transaction. The money moves from one account to another through a secure network operated by the Federal Reserve and private banks.

ACH transfers are slower than wire transfers — they typically take one to three business days — but they cost much less and are the standard method for recurring payments like mortgages, utilities, and insurance premiums. Most homeowners encounter ACH payments when setting up automatic loan payments or when their lender requires electronic payment as a condition of the mortgage.

Key Takeaways

  • ACH payments move money electronically between bank accounts and are the standard method for automatic mortgage and bill payments.
  • Transfers take one to three business days to complete, which is slower than wire transfers but faster than mailed checks.
  • You authorize an ACH payment by providing your bank account number and routing number to the company that will withdraw or deposit the funds.
  • ACH payments are reversible within a limited time if an error occurs, unlike wire transfers which are nearly impossible to recover.
  • Your bank may charge a fee for outgoing ACH transfers, though most lenders do not charge to receive ACH payments from borrowers.

How ACH payments work step by step

When you authorize an ACH payment, you give a company or lender permission to withdraw money from your account on a specific date each month. You provide your routing number (which identifies your bank) and account number. The company then submits your payment information to their bank, which sends it through the ACH network to your bank on the scheduled date.

Your bank receives the instruction, deducts the money from your account, and sends it to the lender's bank. The entire process takes one to three business days. Weekends and federal holidays pause the clock, so a payment submitted on Friday may not clear until Tuesday. Once the money reaches the lender's account, it is considered received and applied to your loan.

The ACH network processes millions of transactions daily in batches rather than one at a time, which is why the system is inexpensive and reliable but not instantaneous. Each batch is processed at set times, usually in the early morning, so the exact timing depends on when your bank submits your payment to the network.

ACH payments versus other payment methods

A wire transfer moves money the same day or next business day but costs $15 to $50 per transaction and cannot be reversed once sent. An ACH payment takes longer but costs little or nothing and can be disputed if an error occurs. A check takes five to seven business days to clear and requires manual processing by the lender. A credit card payment is instant but usually costs 2 to 3 percent in processing fees, which most mortgage lenders do not accept anyway.

For a mortgage payment, ACH is almost always the cheapest and most reliable option. Many lenders offer a small discount — typically 0.25 percent off your interest rate — if you agree to automatic ACH payments, because the lender knows the money will arrive on time and requires no staff to process a check or handle a phone call.

Setting up an ACH payment for your mortgage

Contact your lender and ask whether they offer automatic ACH payments. Most do, and many require it. You will need to provide your bank's routing number and your account number. Your bank statement shows both, or you can call your bank's customer service line to confirm the numbers.

The lender will ask which day of the month you want the payment withdrawn — usually between the 1st and the 28th to avoid issues with months that have fewer days. Choose a date after you normally receive your paycheck so the money is in your account when the withdrawal happens. The lender will send you a confirmation showing the payment amount, date, and account information. Keep this for your records.

Once the first payment processes, the lender will continue withdrawing the same amount on the same date each month until you cancel the arrangement or pay off the loan. If your payment amount changes — for example, because your property tax or insurance escrow changed — the lender will notify you of the new amount before the next withdrawal.

What happens if an ACH payment fails

An ACH payment fails most often because your account does not have enough money on the withdrawal date. When this happens, your bank returns the payment to the lender and may charge you an overdraft or returned-payment fee. The lender will typically attempt to resubmit the payment a few days later, but if it fails again, your account may fall behind.

Contact your lender immediately if a payment fails. Explain what happened and ask whether they will resubmit or whether you need to send a manual payment to catch up. A single failed payment usually does not trigger a late fee if you resolve it within a few days, but it will be reported to your credit if it remains unpaid for 30 days.

If you notice the lender withdrew the wrong amount or withdrew twice in one month, contact them right away. ACH payments can be disputed within a limited window — usually 60 days — and your bank can reverse the transaction and return the money to your account while the dispute is investigated.

ACH payment security and your bank information

Providing your routing number and account number to set up an ACH payment is safe when you give it directly to your lender or a company you trust. These numbers are printed on every check you write and are not secret in the way a password is. However, you should never provide this information in response to an unsolicited email, text, or phone call, because scammers use fake payment requests to steal from accounts.

If you are unsure whether a payment request is legitimate, hang up or close the email and call your lender directly using the phone number on your mortgage statement or billing notice. Legitimate lenders will never pressure you to set up a payment immediately or ask for additional information like your Social Security number or PIN.

Once an ACH payment is set up, your lender has permission to withdraw only the amount you authorized on the date you specified. They cannot change the amount or frequency without notifying you first. If you want to stop automatic payments, contact your lender in writing and request cancellation. Most lenders will stop the payments within one or two business days.

ACH payment fees and costs

Most banks do not charge a fee for incoming ACH transfers, so your lender will not charge you to receive your mortgage payment via ACH. However, some banks charge a small fee — typically $1 to $3 — for outgoing ACH transfers if you initiate the payment yourself through online banking. Check your bank's fee schedule or call customer service to confirm whether you will be charged.

If your lender offers a discount for automatic ACH payments, that savings usually outweighs any small fee your bank charges. For example, a 0.25 percent interest rate reduction on a $300,000 mortgage saves you roughly $750 per year, far more than any ACH fee.

Frequently Asked Questions

Can I cancel an ACH payment after I authorize it?

If the payment has not yet been processed, you can usually cancel it by contacting your lender or bank before the withdrawal date. Once the money has been withdrawn from your account, you can dispute the transaction with your bank within 60 days and request a reversal, but this should only be done if an error occurred — not as a way to avoid a legitimate payment.

What is the difference between ACH debit and ACH credit?

An ACH debit pulls money from your account (like a mortgage payment). An ACH credit pushes money into your account (like a direct deposit paycheck). Both use the same network and take one to three business days. As a homeowner, you will mostly encounter ACH debits when you set up automatic mortgage payments.

Do I need to provide a voided check to set up ACH payments?

Some lenders ask for a voided check to confirm your routing and account numbers, but most will accept the numbers if you provide them directly. A voided check is simply a check you write "VOID" across the front — it proves the account is real and in your name. Ask your lender which method they prefer.

What happens if my bank account closes while ACH payments are set up?

If you close your account, notify your lender immediately so they can stop the automatic withdrawals. If a payment is attempted after the account closes, it will fail and be returned to the lender. You will need to provide new bank account information or arrange a different payment method to avoid falling behind on your mortgage.

Can I set up ACH payments through my lender's website?

Most lenders allow you to set up or manage ACH payments through their online portal or mobile app. Log in to your account, look for a "payments" or "autopay" section, and follow the prompts to add your bank information. If you cannot find the option online, call your lender's customer service line and ask them to set it up over the phone.