What an A/R payment is and why you might send one
An A/R payment is a payment sent to a company's accounts receivable department rather than to a specific invoice or bill. A/R stands for accounts receivable — the money a company is owed. When you send an A/R payment, you are giving the company cash without specifying which bill it should go toward. The company then decides how to apply it.
You might send an A/R payment when you are paying a vendor or contractor you work with regularly, when you are settling a dispute about which invoices are actually owed, or when you are making a partial payment and want the company to choose which bills get paid first. Some businesses also use A/R payments as a way to hold credit with a vendor for future purchases.
The risk of an A/R payment is that the company may apply it differently than you intended. If you owe multiple invoices and the company applies your payment to the wrong one, you could end up with a past-due notice on a bill you thought you had paid. This is why most payment experts recommend paying specific invoices instead — but sometimes an A/R payment is the only option available.
Key Takeaways
- An A/R payment goes to the company's accounts receivable department without being tied to a specific invoice, so the company decides which bills it covers.
- Always send an A/R payment with a written note or email stating which invoices you intend it to cover, even if the company ultimately applies it differently.
- A/R payments can take three to five business days to post, and the company may apply it to the oldest invoice first or to whatever account is flagged as priority.
- If an A/R payment is applied to the wrong invoice and you receive a past-due notice, contact the company immediately with proof of payment and ask for a correction.
How A/R payments are processed and applied
When you send an A/R payment, it typically arrives at the company's accounts receivable or payments department. The payment sits in a holding account until someone manually reviews it and decides which invoice or invoices it should be credited to. This manual step is what makes A/R payments slower than paying a specific invoice — there is no automated system to match your payment to a bill number.
Most companies apply A/R payments using one of three methods. The oldest-invoice-first method applies your payment to whatever bill has been outstanding the longest. The priority method applies it to whichever account is flagged as urgent or at risk of collection action. The customer-request method applies it the way you asked — but only if you included clear instructions with your payment.
The time it takes for an A/R payment to post varies. If you pay by check or bank transfer, expect three to five business days for the payment to clear and then another one to three days for the accounts receivable team to process it. If you pay by credit card or ACH transfer, the posting is usually faster — one to two business days — but the company still needs time to manually apply it to the right account.
How to send an A/R payment safely
Always include a written note with your A/R payment stating exactly which invoices you intend it to cover. If you are paying by check, write the invoice numbers on the memo line and include a separate letter. If you are paying by bank transfer or ACH, send an email to the accounts receivable department at the same time you initiate the payment, with the payment amount, date, and invoice numbers clearly listed.
Get the correct mailing address or payment instructions from the company's website or invoice before you send anything. Do not assume the address on an old invoice is still current — companies move their payment processing departments. If you are paying by ACH or wire transfer, confirm the bank details with the company directly by phone before you send the money.
Keep a copy of everything: the payment confirmation, the email you sent, the note you included, and the date you sent it. If the company later claims they never received the payment or applied it to the wrong invoice, you will need this documentation to prove what you did and when.
What to do if an A/R payment is applied to the wrong invoice
If you receive a past-due notice for an invoice you thought your A/R payment covered, contact the company's accounts receivable department immediately. Do not wait for a second notice or a collection call. Provide your payment confirmation number, the date you sent the payment, and the amount. Ask them to show you which invoice the payment was applied to and why.
If the payment was applied incorrectly, ask the company to reverse the application and reapply it to the correct invoice. Put this request in writing — email is fine — so there is a record of it. Most companies will correct the error within one to three business days. If they refuse or if they claim the payment was never received, ask for a supervisor and provide your proof of payment.
If the company has already reported the unpaid invoice to a credit bureau or sent it to a collection agency, ask them to notify the bureau or agency of the correction once they have reapplied the payment. This can take an additional 30 to 60 days to show up on your credit report, but it is worth following up on to make sure the error does not stay on your record.
A/R payments versus paying a specific invoice
Paying a specific invoice is almost always safer than sending an A/R payment. When you pay a specific invoice — by including an invoice number with your payment or by using the company's online bill pay system — the payment is automatically matched to that bill. There is no manual step, no waiting for someone to decide where your money goes, and no risk of it being applied to the wrong account.
The only reason to send an A/R payment instead is if the company does not accept payments for specific invoices, if you are disputing which invoices are actually owed, or if you are making a partial payment and want the company to choose which bills get priority. In all other cases, ask the company how to pay a specific invoice and use that method instead.
If the company insists on A/R payments, ask them in writing what their standard practice is for applying those payments — oldest invoice first, or by customer request, or some other method. Having this in writing protects you if a payment is later applied in a way you did not expect.
A/R payments and your accounting records
If you are a business owner or accountant, record an A/R payment in your accounting system as a payment to accounts payable, not as a payment to a specific invoice, until the vendor confirms how it was applied. Once the vendor sends you a statement showing which invoices were covered, you can update your records to match.
This matters for your financial statements and for reconciliation. If you record the payment against the wrong invoice in your books, your accounts payable aging report will be inaccurate, and you may think you owe money you have already paid. Ask your vendor to send you a statement or email confirmation showing the application of the payment so your records match theirs.
Frequently Asked Questions
Can I get my A/R payment back if the company applies it wrong?
No — once the company applies the payment to an invoice, the money is credited to your account with them. You cannot reverse it. What you can do is ask them to move the credit from the wrong invoice to the correct one. If they refuse and you believe you do not actually owe the invoice they applied it to, you may have grounds to dispute the charge.
How long does an A/R payment take to show up on my account?
Three to seven business days is typical. The payment itself clears in one to three days, but the accounts receivable team may take an additional two to five days to manually review and apply it. If it has been more than a week and the payment still does not show, contact the company and ask for a status update.
What if I send an A/R payment but forget to include a note about which invoice it should cover?
The company will apply it using their standard method — usually to the oldest invoice first. You can still contact them afterward and ask them to move it to a different invoice if you prefer, but they are not required to do so. Always include a note with the payment to avoid this situation.
Is an A/R payment the same as a general payment or a prepayment?
Not quite. An A/R payment is applied to invoices you already owe. A prepayment is money you send before an invoice is issued — it sits as a credit on your account until you are billed. A general payment is any payment that is not tied to a specific invoice. A/R payments are a type of general payment.
Can I dispute an A/R payment if the company applies it to a bill I do not think I owe?
Yes, but the dispute is about the invoice itself, not about the payment. If you believe an invoice is incorrect or was issued in error, contact the company and explain why you do not owe it. The fact that your A/R payment was applied to it does not change your right to dispute the underlying charge.