What Is an LT16 Notice?
An LT16 is a collection notice from the Internal Revenue Service demanding that you make immediate contact to address an unpaid federal tax balance. It is not a routine reminder, and it is not a notice at the beginning of a process. The LT16 is issued after the standard automated collection sequence — beginning with a CP14 and progressing through reminder notices — has run its course without payment or resolution. By the time the LT16 arrives, the IRS has been trying to reach you for months.
The notice arrives on IRS letterhead and will include your name, address, Social Security number or EIN, the tax years with outstanding balances, the total amount currently owed including accrued penalties and interest through the notice date, a specific phone number to call, and a clear statement that contact is required. The tone of the LT16 is notably more direct than earlier collection notices — it is a demand, not a request.
What makes the LT16 meaningful is not what it says but what comes after it. The LT16 is typically the last notice the IRS sends before issuing the Final Notice of Intent to Levy — the LT11 or Letter 1058 — which begins the 30-day window before the IRS can legally begin seizing wages, bank accounts, state tax refunds, and other assets.
Why Did You Receive an LT16?
The LT16 is issued when several conditions are simultaneously present on your account: an unpaid assessed tax balance, no active payment arrangement in place, no pending appeal or dispute that would legally pause collection, and a record of unanswered or unresolved prior notices.
In other words, the IRS has been trying to reach you and has not successfully gotten resolution. The LT16 is the IRS escalating from automated correspondence to a more direct demand for engagement.
Common paths that lead to receiving an LT16:
Prior notices went to an old address. The most frequent explanation. The IRS sends notices to the last known address on file. If you moved without updating your address with the IRS — which requires filing Form 8822 for individuals or Form 8822-B for businesses — the entire earlier notice sequence may have been delivered to a prior residence. Under IRS rules, a notice is legally delivered when mailed to the last known address, regardless of whether you actually received it. The LT16 may be the first notice you physically receive, but the IRS's records show a full sequence of prior contacts.
Earlier notices were received but not acted upon. Many taxpayers receive IRS balance-due notices and, uncertain what to do, put them aside. Each successive notice is more urgent than the last, but the psychological barrier to acting grows rather than shrinks. By the LT16, the IRS considers the informal follow-up period exhausted.
A prior arrangement defaulted. An installment agreement that fell behind, an Offer in Compromise that was rejected, or a prior period of Currently Not Collectible status that ended — all of these can result in the account returning to active collection and quickly progressing to the LT16 stage, particularly if the account had already been through the earlier notice sequence before the arrangement was made.
Self-employed taxpayers with multi-year accumulating balances. Self-employment tax obligations — quarterly estimated payments plus year-end balances — are easy to underpay or skip during slow income periods. Over several years, small underpayments accumulate into balances that generate the full notice sequence.
What Is Physically on the LT16?
The LT16 is structured as a direct demand, and its contents are designed to communicate urgency clearly:
The outstanding balance. The total amount owed across all tax years referenced on the notice. This includes the assessed base tax, all failure-to-pay penalties that have accrued, and interest through the notice date. The balance shown on the LT16 is almost certainly higher than any earlier notice because interest and penalties have continued accumulating since the earliest balance-due notice was sent.
A breakdown by tax year. Each year with an outstanding balance is listed separately with its individual balance, allowing you to see how the total is distributed across years.
A specific contact number. The LT16 will include a phone number for the IRS unit handling your account — typically a number for the Automated Collection System (ACS), which is the IRS's centralized phone collection operation.
A response date. While the LT16 does not impose a statutory deadline in the same way a deficiency notice does, it references a date by which the IRS expects contact. Missing this date does not automatically trigger a specific penalty, but it accelerates the progression toward the Final Notice of Intent to Levy.
Taxpayer rights information. A summary of your rights during the collection process, including the right to representation and the right to appeal.
Where the LT16 Sits in the Collection Sequence
The IRS's standard collection sequence for individual accounts moves through defined stages:
CP14 — First formal balance-due notice, sent after the return is processed and a balance is assessed
CP501 — First reminder, sent approximately 5 weeks after CP14 without payment
CP502 — Second reminder, sent approximately 5 weeks after CP501
CP503 — Third reminder with more urgent language
CP504 — Notice of Intent to Levy, which allows the IRS to begin levying state tax refunds and notifies you that levy action is being considered
LT16 — Demand for contact, last pre-enforcement notice
LT11 / Letter 1058 — Final Notice of Intent to Levy, which starts the 30-day window before the IRS can legally begin levying wages and bank accounts
The LT16 sits between the CP504 and the Final Notice. It is the last contact the IRS makes asking you to engage voluntarily before the process moves to legal enforcement.
For business accounts with employment tax issues, Revenue Officers may be assigned at or before the LT16 stage, and the sequence can move faster.
What Happens If You Do Not Contact the IRS After Receiving LT16?
If the LT16 is ignored, the IRS proceeds to issue the Final Notice of Intent to Levy — the LT11 or Letter 1058. That notice starts a 30-day window. During that 30 days, you have the right to request a Collection Due Process (CDP) Hearing, which temporarily pauses collection while an independent IRS Appeals officer reviews your case.
If the 30-day window closes without a CDP hearing request, the IRS can begin levy action. Levy action includes:
Wage garnishment. The IRS sends a continuous levy notice to your employer. Unlike court-ordered garnishments, the IRS levy is not limited to 25% of disposable income — the IRS takes everything above a small exempt amount based on your filing status and dependents. The garnishment continues every pay period until the balance is fully paid or the levy is released.
Bank account levy. The IRS sends a levy notice to your bank. The bank freezes your account balance as of that date for 21 days. After 21 days, the frozen funds are sent to the IRS. This can drain a bank account entirely in a single levy.
State tax refund levy. The IRS can intercept your state income tax refund and apply it to the federal balance.
Other asset levies. The IRS can levy Social Security benefits (up to 15%), retirement account distributions, accounts receivable for businesses, and in some cases physical assets.
The LT16 is the last point at which engaging with the IRS is genuinely easier than what follows.
What to Expect When You Call the IRS in Response to LT16
Many taxpayers who receive an LT16 call the number on the notice without preparation, which can result in payment arrangements that do not reflect their actual financial situation or that they cannot sustain. If you are calling the IRS in response to an LT16, being prepared significantly affects the outcome.
The IRS representative will pull up your account and will want to discuss your current financial situation — income, expenses, assets, and ability to pay. Based on that information, they will calculate a proposed payment based on what the IRS believes you can afford using its National and Local Standards expense guidelines.
What you say during this call matters. Agreeing to a payment amount that is too high to sustain will result in a defaulted installment agreement and a worse situation than before. Understanding the IRS's Standards and how they apply to your expenses before the call gives you a foundation for negotiating a sustainable arrangement.
Who Receives LT16 Most Often?
Taxpayers who moved without updating the IRS. This is consistently the most common explanation for receiving an LT16 as a first notice — the prior sequence was delivered to a prior address.
Taxpayers who received earlier notices but were overwhelmed by the situation. Tax debt creates significant stress, and avoidance is a common response. Each notice that goes unanswered makes the next one harder to face. The LT16 is the end of the avoidance runway.
Self-employed taxpayers with multi-year accumulated balances. Irregular income and self-employment tax obligations are a consistently high-risk combination for balance accumulation.
Taxpayers emerging from a period of financial hardship. Someone who was in Currently Not Collectible status, went through bankruptcy, or had an arrangement that ended may find their account returning to active collection and quickly reaching the LT16 stage.
Related IRS Notices
- CP504 — Notice of Intent to Levy — what typically precedes the LT16
- Letter 1058 / LT11 — Final Notice of Intent to Levy — what the LT16 escalates to if ignored
- LT39 — Installment Agreement Default — a common reason accounts return to active collection and reach the LT16
Frequently Asked Questions
Can I still set up a payment plan after receiving an LT16?
Yes. Receiving an LT16 does not eliminate payment plan eligibility. If you contact the IRS and establish an installment agreement, the account will be placed in protected status and levy action will be paused as long as payments remain current. The key is to engage before the Final Notice of Intent to Levy is issued and the 30-day window begins.
What if I cannot make any payment at all?
If your current financial situation genuinely leaves no ability to make payments — your income does not cover basic living expenses — you may qualify for Currently Not Collectible (CNC) status, which formally suspends all collection activity while your financial hardship is documented. CNC does not eliminate the debt or stop interest from accruing, but it pauses enforcement.
What if the balance on the LT16 is wrong?
If you believe the balance shown is incorrect — because a payment was not credited, because the assessment itself was wrong, or for any other reason — do not agree to a payment arrangement for an amount you dispute without first raising the disagreement. You can dispute the balance while simultaneously addressing the enforcement risk.
Can a tax professional contact the IRS on my behalf in response to an LT16?
Yes. By filing Form 2848 (Power of Attorney), a licensed tax professional can contact the IRS on your behalf, review your full account transcript, handle the LT16 response, and negotiate any resulting arrangement. In many cases, having a professional make this contact results in better outcomes than an unprepared individual call to ACS.
Does the LT16 give me any formal rights I did not have before?
The LT16 itself does not create new formal rights beyond what you had earlier. The formal legal protection — the right to a Collection Due Process Hearing — is triggered by the Final Notice of Intent to Levy (LT11 or Letter 1058) that follows the LT16. At the LT16 stage, your protection comes from engaging and establishing an arrangement before the Final Notice is issued.
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