IRS Letter LT 40

IRS Letter LT 40 means the IRS is trying to collect an unpaid balance or a missing return from you, and it plans to contact other people to find you or verify your contact information. You got Letter LT 40 because the IRS has not been able to reach you through normal channels, and its automated collection system has flagged your account for third-party contact. This is not a random mailing. The IRS sends Letter LT 40 when it intends to call or write to people like your bank, your employer, or your neighbors to locate you. You can read the agency description at the IRS page on understanding your LT40 notice.

Here is the mechanics behind Letter LT 40. The law that governs third-party contact lives in Section 7602(c) of the tax code, and it requires the IRS to give you advance notice before it reaches out to anyone else about your tax matter. The notice must tell you the time period, no longer than one year, during which the IRS plans to make those contacts. The IRS must send that warning at least 45 days before the first contact. So when Letter LT 40 lands in your mailbox, a clock starts. The agency can begin contacting third parties on the 46th day after the date printed on the related notice.

Here is a worked example. Say you owe 14,200 dollars from your 2023 return and you moved without updating your address. The IRS sends Letter LT 40 dated March 1. The 45 day window means the IRS can start calling your old employer or your bank around April 15 to confirm where you work and bank. If you respond before then, you stop those calls cold. We had a client who owed 9,800 and ignored two earlier notices. Letter LT 40 was the point where we stepped in, called the IRS, set up an installment agreement, and the third-party contacts never happened.

Here is a second example of why Letter LT 40 matters. A small business owner owed 47,000 dollars in unpaid payroll taxes and had let several IRS notices pile up unopened. When Letter LT 40 arrived, the IRS was preparing to contact his vendors and his bank to map his cash flow before levying. We opened the file, found that 12,000 of the balance was penalties he could get abated for reasonable cause, and negotiated the rest into a partial payment installment agreement. Because we acted inside the Letter LT 40 window, the IRS never called his vendors, which mattered enormously since those relationships were the lifeblood of his business. A single embarrassing call from the IRS to a key supplier can cost you a credit line. Letter LT 40 is the last quiet warning you get before that risk becomes real, which is exactly why you treat it as urgent.

The common mistake we see every year is treating Letter LT 40 like junk mail. People assume because it does not demand immediate payment that it can wait. It cannot. Letter LT 40 is a signal that the IRS is escalating and is willing to involve outside parties, which can embarrass you with an employer or a bank. The edge case is when the balance is not actually yours, say from identity theft or a misapplied payment. In that situation you still respond fast, but the path is to dispute rather than pay. If a Letter LT 40 just arrived, our IRS audit and notice assistance team can call the IRS on your behalf, and you can start through our new client inquiry form the same day.

The practical deadline to respond to Letter LT 40 is before the 45 day third-party contact window closes, which means you have roughly six weeks from the date on the notice to act before the IRS starts contacting other people about your account. Letter LT 40 itself does not set a hard payment due date the way a balance-due bill does, but the 45 day clock is real, and waiting past it lets the IRS call your bank, your employer, and others. The IRS explains the third-party contact framework in its guidance on Letter 3164, the third-party notice, which shares the same legal basis as Letter LT 40.

Here is the mechanics of ignoring it. Letter LT 40 sits inside the IRS collection sequence. If you do nothing after Letter LT 40, the next steps can include the contacts themselves, then more aggressive collection notices, and eventually a notice of intent to levy. A levy lets the IRS take money straight from your bank account or garnish your wages. The IRS must send a final notice and give you 30 days to request a hearing before it levies, but Letter LT 40 is a warning that you are heading down that road. Ignoring Letter LT 40 does not make the balance go away, it just removes your chance to control how the IRS proceeds.

Here is a worked example. A client owed 21,500 dollars and ignored Letter LT 40 for three months. The IRS contacted her employer to verify wages, then issued a wage levy that took 1,900 dollars from her next paycheck. Once we got involved, we filed for a levy release and set up a 350 dollar monthly installment agreement, but she lost that first 1,900 and the embarrassment with her HR department was already done. Had she responded to Letter LT 40 in the first 45 days, none of that happens. The cost of silence was real money and a damaged reputation at work.

Here is a second example of the cost of ignoring Letter LT 40. A retired couple owed 16,400 dollars and assumed that because they were on a fixed income the IRS would simply leave them alone. They ignored Letter LT 40 and the notices that followed. The IRS eventually levied 1,100 dollars from their Social Security benefits, which it can do up to 15 percent under the Federal Payment Levy Program. That levy hit a budget with no room to spare. When they finally came to us, we showed that their income and expenses qualified them for currently-not-collectible status, which would have paused all collection from the start. Had they responded to Letter LT 40 instead of ignoring it, we could have filed for that status before a single dollar left their benefits. Ignoring the notice did not protect them, it just handed the IRS control over how and when it collected.

The common mistake we see every year is people who respond to Letter LT 40 but only verbally, with no follow-up in writing and no payment plan in place. A phone call buys you a little time, but the IRS wants a resolution, either full payment, an installment agreement, an offer in compromise, or a currently-not-collectible status. The edge case is financial hardship. If paying would leave you unable to cover rent and food, you may qualify for currently-not-collectible status, which pauses collection, though interest still runs. If Letter LT 40 is sitting on your desk, do not let the 45 days run out. Our tax compliance team builds the response, and our IRS audit and notice assistance team handles the IRS calls so the third-party contacts stop.

You respond to Letter LT 40 by contacting the IRS at the number on the notice before the 45 day window closes, confirming your current address and phone, and resolving the underlying balance or filing the missing return. The whole point of Letter LT 40 is that the IRS cannot reach you, so the fastest way to stop third-party contacts is to make yourself reachable and deal with the debt. Once the IRS has a working line to you and a plan in place, it has no reason to call your bank or employer. The IRS lays out your payment paths at the IRS payments page.

Here is the mechanics. When you call the number on Letter LT 40, have the notice and a copy of the return in question in front of you. Verify your identity, confirm the balance, and then choose a resolution. If you can pay in full, do it and the matter ends. If you cannot, ask about an installment agreement. Most individuals who owe under 50,000 dollars qualify for a streamlined agreement that you can even set up online without long financial disclosures. If the balance came from a return you never filed, the IRS may have filed a substitute return for you that ignores your deductions, and filing the real return often cuts the balance.

Here is a worked example. A client got Letter LT 40 showing a 33,000 dollar balance from a substitute return the IRS filed for his 2022 self-employment income. The IRS gave him no business deductions, so the number was inflated. We prepared his actual Schedule C, which showed 41,000 in legitimate expenses, and the real balance dropped to about 11,400 dollars. We then set up a 240 dollar monthly installment agreement. By responding to Letter LT 40 with an accurate return rather than just paying the inflated figure, he saved over 21,000 dollars. The third-party contacts never started because we called inside the 45 day window.

Here is a second example of responding the right way. A freelance designer got Letter LT 40 on a 19,800 dollar balance she genuinely owed but could not pay in a lump sum. Rather than panic, she called the number on the notice with us on the line, confirmed her current address and bank details so the IRS had no reason to contact third parties, and we proposed a 285 dollar monthly installment agreement. The IRS accepted it on the call. Because the balance was under 50,000 dollars, she qualified for the streamlined plan with no financial statement required. Within 20 minutes the account moved from active collection to a payment plan, and the threat of third-party contacts evaporated. Responding to Letter LT 40 does not always mean you have the money to pay everything today. It means you engage, make yourself reachable, and put a structure in place so the IRS stops escalating.

The common mistake we see every year is people who pay the balance on Letter LT 40 without checking whether it is correct. If the number came from a substitute return or a misapplied payment, you may be paying far more than you owe. Always verify the balance before you pay. The edge case is when your account has been assigned to a private collection agency, which the IRS does for older overdue accounts and explains at the IRS private debt collection page. In that case the contact rules differ slightly, and you want to confirm the collector is legitimate before sending a dime. Our IRS audit and notice assistance team verifies the balance and runs the call, and our tax compliance team prepares any missing returns that lower it.

Yes, you can dispute the balance on Letter LT 40 if you believe it is wrong, and you should do it before the 45 day third-party contact window closes so the IRS holds off on calling other people while you sort it out. Letter LT 40 reflects what the IRS thinks you owe, but that figure is sometimes built on bad information, a substitute return, a misapplied payment, or even identity theft. Disputing it means showing the IRS the correct numbers and asking for an adjustment. You start by calling the number on the notice and stating clearly that you disagree with the balance and why.

Here is the mechanics of a dispute. If the balance came from a substitute return the IRS filed because you never filed your own, the fix is to file the real return, which the IRS will then process to replace its estimate. If the balance came from a math error or a missing payment, you provide proof, a canceled check or a bank record showing the payment, and the IRS corrects the account. If you believe the debt is not yours at all, you raise identity theft and file Form 14039, the identity theft affidavit. The IRS will pause collection on Letter LT 40 while it investigates a legitimate identity theft claim.

Here is a worked example. A client got Letter LT 40 for a 7,600 dollar balance she did not recognize. We pulled her IRS account transcript and found a 7,600 payment she made in 2023 had been applied to the wrong tax year. We sent the IRS a copy of the canceled check and the transcript, and the IRS moved the payment to the correct year. Her balance went to zero, and the Letter LT 40 collection action was closed. Had she simply paid the 7,600 to make the notice go away, she would have paid the same money twice. The dispute saved her the entire amount.

Here is a second example of a successful dispute. A taxpayer got Letter LT 40 for a 28,000 dollar balance tied to a 2021 stock sale. The IRS had counted the entire 95,000 dollars of sale proceeds as gain, because the broker reported the proceeds but not the cost basis. In reality he had paid 88,000 for those shares, so his actual gain was only 7,000 dollars. We filed an amended return with the corrected basis from his brokerage statements, and the balance fell from 28,000 to about 1,700. This is one of the most common reasons a Letter LT 40 balance is wrong. The IRS often sees only the income side of a transaction and assumes the whole amount is taxable. Disputing with the right documentation, in this case the original purchase confirmations, turned a 28,000 dollar problem into a minor one. Always check whether the IRS counted gross proceeds as if they were pure profit.

The common mistake we see every year is people who dispute Letter LT 40 by phone but never send written documentation, so the IRS has nothing to act on and the balance stands. A verbal disagreement is not a dispute. You need to back it with documents, transcripts, canceled checks, corrected returns, or an identity theft affidavit. The edge case is when you partly agree, say the IRS says 18,000 but you think it should be 6,000. In that case you pay or arrange the part you agree with and dispute the rest, which keeps you in good standing on the undisputed piece. If your Letter LT 40 balance looks wrong, our IRS audit and notice assistance team pulls your transcripts and builds the dispute, and our unpaid income tracking service finds the records that prove your case.

After Letter LT 40, the IRS can contact people who might know how to reach you or verify your financial information, which includes your bank, your employer, your neighbors, and others who deal with you. The purpose is narrow. The IRS is trying to locate you or confirm assets and income so it can collect the balance on Letter LT 40. The law limits how much the IRS can reveal, so these third parties learn only what they need to help, not the details of your tax debt. The IRS describes the third-party contact program and its limits in its internal manual on the third party contact program.

Here is the mechanics of what the IRS can say. By law the IRS discloses the least information necessary. When it calls your bank, it generally identifies you by name and asks whether you hold an account, not the amount you owe. When it contacts your employer, it confirms that you work there and may verify wages for a possible levy. The IRS is barred from telling a neighbor the size of your debt or the nature of your tax problem. So while Letter LT 40 means the IRS may reach out to people in your life, those people do not get a rundown of your finances. They get a narrow question.

Here is a worked example. A client ignored Letter LT 40, and the IRS contacted his bank and his employer. The bank confirmed he held a checking account, which let the IRS later levy 4,300 dollars from it. The employer confirmed his salary, which set up a potential wage garnishment. Neither party learned the 19,000 dollar balance, but both now knew the IRS was pursuing him, which was uncomfortable enough. Once we set up an installment agreement, the contacts stopped and the levy was released, but the genie was already out of the bottle with his bank and his HR office.

Here is a second example of how third-party contacts play out. A self-employed plumber ignored Letter LT 40, and the IRS contacted three of his largest commercial clients to verify that he performed work for them and to confirm payment amounts, since it was building a case for a levy on his accounts receivable. The clients were not told the size of his debt, but they now knew the IRS was investigating his finances, and one of them quietly moved future work to another contractor. That lost relationship cost him far more over time than the 13,000 dollar balance that started it. Letter LT 40 gave him 45 days to prevent exactly this outcome, and he let the window pass. The lesson is that the people the IRS contacts are often the very people whose trust your livelihood depends on. Stopping those contacts is usually worth far more than the underlying tax.

The common mistake we see every year is assuming the IRS will not actually make these contacts, that Letter LT 40 is a bluff. It is not. The IRS sends Letter LT 40 specifically because it intends to contact third parties, and once the 45 days pass it routinely does so. You also have the right to request a list of the third parties the IRS contacted, which you can ask for in writing. The edge case is a private collection agency, which the IRS uses for certain older accounts and explains at the IRS private debt collection FAQs. Those agencies follow the same contact limits but are easy to confuse with scammers, so verify before responding. To keep the IRS from reaching into your professional and banking relationships, our IRS audit and notice assistance team resolves the Letter LT 40 balance fast, and our tax strategy consulting team helps you avoid landing back in collection next year.