An ACI payment is a way to send money directly to the IRS through your bank, using the same electronic system that moves paychecks and bill payments
ACI stands for Automated Clearing House Initiation. It is not a special IRS program or a different kind of tax payment — it is straightforward the method your bank uses to move the money from your account to the IRS's account. When you set up an electronic payment to the IRS through your bank's website or by phone, your bank sends that payment through the ACH network, which is the backbone of how most routine money moves between accounts in the United States.
The IRS accepts ACH payments the same way it accepts checks or credit card payments. The difference is timing and certainty. An ACH payment leaves your account on a date you choose, arrives at the IRS within one to two business days, and creates an electronic record that both you and the IRS can see. There is no envelope to lose, no check to clear, and no question about whether the IRS received it.
Key Takeaways
- An ACI payment is an electronic bank transfer to the IRS, not a separate tax program or payment type.
- You initiate an ACH payment through your own bank's website or phone line, not through the IRS directly.
- The money leaves your account on the date you schedule and reaches the IRS within one to two business days.
- ACH payments create a permanent electronic record and are safer than mailing a check.
How an ACH payment to the IRS moves through the banking system
When you log into your bank's bill pay system and enter the IRS as a payee, you are instructing your bank to send money through the ACH network. Your bank does not send the money directly to the IRS. Instead, it sends the payment to a clearing house — a central hub that sorts and routes payments — which then delivers it to the IRS's bank account.
The entire process takes one to two business days. On the day you schedule the payment, your bank deducts the money from your account and sends the instruction through the ACH network. The next business day, the clearing house processes it. By the second business day, the IRS's bank receives the funds and credits them to the IRS account. The IRS then matches the payment to your tax account using information you provide — usually your Social Security number or Employer Identification Number.
This is different from a wire transfer, which is faster but more expensive and requires you to provide the IRS's specific bank routing number. Most people use ACH because it is free and the one- to two-day timeline is fast enough for most situations.
Where you actually make an ACH payment to the IRS
You do not go to the IRS website to send an ACH payment. You go to your own bank. Log into your checking or savings account online, find the bill pay or transfer section, and add the IRS as a payee. Your bank will ask for the payment amount, the date you want the money to leave your account, and your tax identification number so the IRS knows which account to credit.
Some banks also let you set up an ACH payment by phone. Call your bank's customer service number, give them the same information, and they will schedule the payment for you. Either way, you are working with your bank, not the IRS.
The IRS also runs its own payment system called IRS Direct Pay, which lets you schedule payments directly through irs.gov. When you use Direct Pay, the IRS still moves the money through the ACH network — it just handles the scheduling for you instead of your bank doing it. Direct Pay is free and shows you a confirmation number when ready, which some people prefer.
Why the timing matters when you schedule an ACH payment
The one- to two-day processing time is important if you are paying a tax bill by a important date. If the IRS important date is April 15 and you schedule an ACH payment on April 14, the money will not reach the IRS until April 16 or later. The IRS considers the payment date to be the day your bank sends it into the ACH network, not the day it arrives at the IRS — but you need to know your bank's cutoff time.
Most banks have a cutoff time in the afternoon (often 2 or 3 p.m. Eastern time). If you schedule a payment after the cutoff, your bank treats it as if you scheduled it the next business day. So if you schedule an ACH payment on a Friday at 4 p.m., your bank does not send it until Monday, and the IRS does not receive it until Tuesday or Wednesday.
If you are cutting it close to a important date, use IRS Direct Pay instead. Direct Pay lets you schedule a payment for the same day if you submit it before the cutoff, and the IRS counts the payment date as the day you schedule it, not the day it arrives.
ACH payments versus other ways to pay the IRS
The IRS accepts four main payment methods: checks, ACH payments, credit or debit cards, and wire transfers. Each has a different cost and timeline.
| Payment Method | Cost | Timeline | When to Use It |
|---|---|---|---|
| ACH (through your bank) | Free | 1–2 business days | You have a few days before the important date and want no cost |
| IRS Direct Pay | Free | 1–2 business days | You want a confirmation number and prefer the IRS to handle scheduling |
| Check | Free | 7–10 business days | You do not have a bank account or prefer paper |
| Credit or debit card | 2–3% fee | Same day | You need the payment to post when ready and can absorb the fee |
| Wire transfer | $15–$30 (bank fee) | Same day | You need same-day posting and have the bank's routing information |
An ACH payment is the most common choice because it is free and fast enough for most important date. If you are paying a bill you owe and have no important date pressure, ACH is the obvious choice. If you are close to a important date or need the payment to post the same day, a credit card or wire transfer is faster, though both cost money.
What happens after the IRS receives your ACH payment
Once the IRS receives the ACH payment, it credits the money to your tax account within one to three business days. You can check the status of your payment through the IRS website using the Where's My Payment tool, though this tool is primarily for refunds. For payments you owe, the IRS updates your account transcript, which you can view through your online IRS account.
Keep the confirmation number your bank gives you when you schedule the payment. If there is ever a question about whether the IRS received the money, that confirmation number proves you sent it and when. The IRS rarely loses an ACH payment, but the confirmation number is your proof if something goes wrong.
If you are on a payment plan with the IRS, you can set up recurring ACH payments so the same amount leaves your account on the same day each month automatically. This is called an installment agreement with automatic withdrawal. The IRS charges a lower setup fee if you agree to automatic ACH payments instead of paying manually each month.
Frequently Asked Questions
Is an ACH payment the same as a wire transfer to the IRS?
No. An ACH payment goes through the clearing house network and takes one to two business days. A wire transfer goes directly from your bank to the IRS's bank and posts the same day. Wire transfers cost $15 to $30 in bank fees. ACH is free but slower.
Can I cancel an ACH payment after I schedule it?
Yes, but only before your bank sends it into the ACH network. Once your bank's cutoff time passes, the payment is in the system and cannot be stopped. If you scheduled it for a future date and it has not been sent yet, call your bank and ask them to cancel it. If it has already been sent, you cannot stop it.
What if I send an ACH payment but do not include my Social Security number?
The IRS will not know which tax account to credit. The payment will sit in a suspense account until you contact the IRS and provide your Social Security number. Always include your tax ID when you schedule the payment so the IRS can match it to your account when ready.
Do I need to tell the IRS I am sending an ACH payment?
No. The ACH payment itself is the notification. The IRS receives the payment and the information attached to it, and credits your account. You do not need to file any additional paperwork or send a letter.
Can I use ACH to pay state taxes the same way?
Most states accept ACH payments through their own tax websites or through your bank's bill pay system, but the process varies by state. Check your state's tax agency website for the correct mailing address or account number to use when you set up the payment through your bank.