IRS Notices
IRS CP2000 Notice: What It Is, the Deadline and How to Respond (2026)
Read the transcript
Host: So you filed months ago, you figured you were done, and then several pages of IRS tables show up saying your return doesn't match what was reported to them. And there's a proposed amount at the bottom big enough to swallow months of retirement income.
Tax specialist: Right. And the first thing to say, because the notice does not say it clearly, that is not a bill. It's a proposal.
Host: Not a bill. Not an audit either?
Tax specialist: Not an audit. A CP2000 comes out of a program called the Automated Underreporter — AUR. Every payer sends the IRS a copy of what they sent you. Your bank, your brokerage, your IRA custodian, Social Security. A computer lines those copies up against your return, usually a year or more later, and anything it can't match becomes a proposed change. No examiner. No audit file. Nobody suspects you of anything.
Host: Okay, so it's a machine. But the number on it still feels very real.
Tax specialist: It's real in the sense that it can become a legal debt. It's not real in the sense of being accurate. That computer knows the payer's number and nothing else. It doesn't know your cost basis, it doesn't know you did a rollover, it doesn't know you sent money from your IRA to your church.
Host: Give me the clearest version of that.
Tax specialist: Sold fifteen thousand dollars of a mutual fund. The 1099-B reports gross proceeds — fifteen thousand. If it shows no basis, the computer treats the whole fifteen thousand as gain. But if you paid thirteen thousand six hundred for those shares, your actual gain is fourteen hundred dollars.
Host: Thirteen-six in, fifteen out. So fourteen hundred of gain, and the proposal is taxing all fifteen thousand.
Tax specialist: Correct. Same story with retirement money. A trustee-to-trustee transfer, a sixty-day rollover, a qualified charitable distribution — all three generate a 1099-R that looks like taxable income to a matching program. The exclusion is invisible to it.
Host: Hm. And there's a Social Security piece too, isn't there.
Tax specialist: That's the part people miss. Every dollar of added income can make more of your Social Security benefits taxable. So the proposal ends up taxing income you did report correctly, just at a higher level. It cascades.
Host: Walk me through the example in the article. The eighty-nine hundred.
Tax specialist: Sure. Hypothetical retiree, prior tax year, CP2000 proposes eighty-nine hundred dollars. Two items the notice says are missing — a twenty-four thousand dollar IRA distribution on a 1099-R, and fifteen thousand of mutual fund proceeds on a 1099-B. The computer's math: additional tax on thirty-nine thousand of so-called unreported income plus newly taxable Social Security, seventy-one fifty. Then a twenty percent accuracy penalty on that tax, fourteen hundred thirty. Then interest from the original due date, three hundred twenty. Adds to eighty-nine hundred.
Host: And the actual facts were different.
Tax specialist: The brokerage statements show thirteen thousand six hundred paid for the shares, so fourteen hundred of gain, not fifteen thousand. And twelve thousand of that IRA distribution went straight to the church as a QCD, which is excludable. A partially-agree response with those documents attached asks the IRS to recompute on roughly thirteen thousand four hundred of genuinely taxable income instead of thirty-nine thousand.
Host: Wait, and the penalty moves with it?
Tax specialist: That's the mechanical part. The twenty percent penalty is computed on the tax, and the interest runs on the tax. Shrink the income correction and both of those shrink with it automatically. You don't argue them separately, although you can also ask for the accuracy penalty to be removed for reasonable cause, and you should address that directly instead of letting it ride.
Host: Reasonable cause meaning what, in plain terms?
Tax specialist: Facts like. You relied on a payer's incorrect form, or a preparer's error, or records you had no way to know were incomplete. You have to make that showing. Nobody applies it for you, and I'm not going to tell you how the IRS will rule on it.
Host: Fair. Let's do the clock, because that's the anxious part.
Tax specialist: Three numbers control everything and they're all on page one. The notice date, the response deadline, and the proposed amount. The deadline is typically thirty days from the notice date, but use the printed date, not your own counting.
Host: And if that date passes?
Tax specialist: The case moves toward a CP3219A — a Statutory Notice of Deficiency. That opens a strict ninety-day window to petition Tax Court, and that ninety days is statutory. Nobody at the IRS can extend it. If that window also closes, the tax gets assessed, and your position changes from prove-your-case-by-mail to pay-first-argue-later.
Host: Then collection.
Tax specialist: Then a bill, then escalating notices, ending in a final notice of intent to levy. After assessment the IRS can file a lien, levy bank accounts, and take up to fifteen percent of monthly Social Security through the Federal Payment Levy Program. None of that can happen at the proposal stage, but the sequence is automated. It escalates on schedule whether or not a human ever reads your file.
Host: Okay. So what do you actually send?
Tax specialist: The response form that comes inside the notice. Three boxes: agree in full, partially agree, disagree in full. Mark one, attach proof for every item you dispute — broker statements, rollover confirmations, QCD acknowledgments, a corrected 1099 — and mail it certified so you can prove the postmark.
Host: And the thing not to do.
Tax specialist: Do not file Form 1040-X. The IRS says so on the notice itself. An amended return dropped into an open underreporter case creates a second parallel file and can add months of confusion. It's an expensive first move to undo.
Host: Say that one again more simply for me.
Tax specialist: Don't amend your return. Answer the notice on its own form.
Host: Got it. What if someone checks their transcript while they're waiting?
Tax specialist: You may see code 922 — that's the underreporter review being opened, sometimes before the notice even arrives. Code 971 means a notice was issued; match that date to your notice date, because the clock runs from there. Code 570 is a hold, often freezing a refund while the review is open. Code 290 is additional tax assessed, and 291 means an assessment was reduced.
Host: 922, 971, 570. And what about someone who agrees with the notice but genuinely can't write the check?
Tax specialist: Those are two separate decisions. Sign the agreement, then pick the payment path. There's a short-term plan, up to a hundred eighty days, no setup fee. For balances of ten thousand or less, the IRS's own rules make the Guaranteed Installment Agreement available when you meet its filing and payment conditions. Balances up to fifty thousand can go as long as seventy-two months online with no financial statement. And if a fixed income barely covers living expenses, Currently Not Collectible status can pause collection — the debt stays and interest keeps accruing, but no levy touches benefits while the hardship holds.
Host: And plenty of these people don't need us at all, right?
Tax specialist: Honestly, no. If the notice is right, you missed one 1099, and the fix is one clean document, and you can handle the balance, do it yourself. Where experience actually matters is narrower. A CP3219A already sitting on top of the CP2000 with that ninety-day clock running. Multiple years open. Self-employment income in the mix, because SE tax gets computed wrong. A 1099 that isn't yours — identity theft. Or the balance is genuinely unpayable and the real question is hardship versus a plan.
Host: So, next twenty-four hours.
Tax specialist: Find the notice date, the response deadline, and the tax year on page one, and write that deadline somewhere you'll see it. Then pull that year's return and every 1099-R, 1099-B, 1099-INT, 1099-DIV and SSA-1099 — especially anything showing basis, a rollover, or a QCD. If you want a second set of eyes before the date passes, the review is free — eight-eight-eight, eight-two-five, seven-seven-seven-nine.
Host: While all three boxes are still open.
Tax specialist: That's the whole point of moving now.
The short answer: a CP2000 notice means the income the IRS received from employers, banks and brokers does not match what you reported on your return. The IRS says the notice "isn't a bill," and it is not an audit. It proposes changes, and you reply by the date printed on it, typically 30 days from the notice date, to agree, partially agree or disagree.
You filed months ago, expected nothing, and now several pages of IRS tables say your return "doesn't match the information reported to us," with a proposed amount due at the bottom. The part the notice buries: that number is a computer's opening position, calculated with no knowledge of your cost basis, rollovers or charitable IRA gifts. It is often wrong in ways you can document, and this page shows you how.
Three numbers on the notice control everything: the notice date, the response deadline and the proposed amount. The image below shows exactly what a CP2000 looks like and where each of those sits, so you can find yours before reading on. If you are not sure why the IRS wrote to you at all, our guide to why you got a letter from the IRS maps every letter type; this page covers the CP2000 only.
⏱ Your deadline: the response date printed on page 1 of your CP2000, typically 30 days from the notice date. Miss it and the IRS may send a CP3219A Statutory Notice of Deficiency, which opens a 90-day window to petition the Tax Court. Interest on any tax you actually owe keeps running the entire time.
What is a CP2000 notice, and why did the IRS send it?
The IRS puts the reason in one sentence: "The income or payment information we received from third parties, such as employers or financial institutions, doesn't match what you reported on your tax return." The notice comes from the Automated Underreporter (AUR) program. Every payer sends the IRS a copy of the form it sent you: your employer's W-2, your bank's 1099-INT, your broker's 1099-B, your IRA custodian's 1099-R, the Social Security Administration's SSA-1099. A computer lines those copies up against your return, usually a year or more after you filed, and anything it cannot match becomes a proposed change.
No person decided you did something wrong. There is no examiner and no audit file. There is a mismatch, and mismatches happen to careful filers constantly. The common triggers:
- A 1099 that never made the return: a pension that started mid-year, a custodian that changed hands, a 1099 you weren't expecting.
- A rollover counted as taxable: you moved an IRA between institutions and the computer read the 1099-R as a cash-out.
- A qualified charitable distribution: the 1099-R reports the full amount you sent to charity from your IRA. The exclusion is invisible to the matching program.
- A 1099-B with no cost basis: the broker reported gross sale proceeds. The computer taxed the whole sale as if you paid nothing for the shares.
- The Social Security cascade: every dollar of added income can make more of your SSA-1099 benefits taxable, so the proposal taxes income you did report, at a higher level.
Two things a CP2000 is not. It is not a math-error correction; those arrive as a CP11 or CP12 and change the return immediately. And it is not the gentler opening inquiry, the CP2501, which flags a mismatch without computing full dollar amounts. A CP2000 sits in between: specific numbers, still a proposal.
Is a CP2000 a bill or an audit?
Neither. The IRS's own page on the notice says, "This notice isn't a bill and your response may be required." Nothing has been assessed yet, and nothing is owed until you agree or the dispute windows close. It is not an audit either: an audit is an examination of your books and records by a person. A CP2000 is a document match run by a computer, and answering it does not open an audit. What it can do is become real tax, with a penalty and interest attached, if it is ignored. That is the only reason to treat the deadline as seriously as the notice suggests.
“This notice isn't a bill and your response may be required.”
— Understanding your CP2000 notice (IRS.gov)
Why the CP2000 proposed amount is often too high
The AUR computer calculates the proposed tax using only the payer's numbers. It knows nothing about your cost basis, your rollover paperwork or your charitable intent, which produces an overstatement in three predictable situations. Securities sales: when a 1099-B shows gross proceeds with no basis, the computer treats the entire sale price as gain. Sell $15,000 of a fund you bought for $13,600 and the real gain is $1,400. But the proposal taxes all $15,000. Retirement account movements: trustee-to-trustee transfers, 60-day rollovers and QCDs all produce a 1099-R that looks like taxable income to a matching program. Stacked penalty and interest: many CP2000s add the 20% accuracy-related penalty plus interest from the return's original due date, both computed on the overstated tax, so shrinking the income correction shrinks them automatically. The penalty and interest calculator estimates how much of a proposed balance is penalty and interest rather than tax.
Say a retiree's CP2000 proposes $8,900: additional tax of $7,150 on $39,000 of "unreported" income (a $24,000 IRA distribution and $15,000 of fund proceeds), a 20% accuracy penalty of $1,430, and $320 of interest. The brokerage statements show $13,600 paid for the shares, so the real gain is $1,400, and $12,000 of the IRA distribution went straight to a church as a qualified charitable distribution. A partial-agreement response with those two documents attached asks the IRS to recompute on roughly $13,400 of taxable income instead of $39,000. The tax, the penalty and the interest all fall with it. None of this means every CP2000 is wrong. Sometimes the missing 1099 is real and the number is right. It means you verify line by line before you agree to anything.
How to respond to a CP2000: the response form, upload, fax or mail
Every CP2000 comes with a response form offering three positions: agree in full, partially agree, or disagree. The IRS's instructions are short. If you agree: "Follow the notice's instructions. You don't need to amend your return." If you disagree or partially agree: "Complete and sign it. State whether you agree or disagree with the notice and include any supporting documentation." You can send the response three ways: through the IRS document upload tool linked from the notice, by fax to the number printed on it, or by mail to the address printed on it. If you mail it, use certified mail so you can prove the postmark. If you filed jointly, both spouses sign.
One rule applies to all three positions: do not file Form 1040-X in response to a CP2000. An amended return dropped into an open underreporter case creates a second, parallel file and can add months of confusion. Answer the notice on its own form.
| Your position | What you send | Watch out for |
|---|---|---|
| Agree in full | The signed response form, plus payment or a payment-plan request. The IRS assesses the amount and closes the case. | Only sign after checking every line item; an agreed assessment is hard to unwind. |
| Partially agree | The response form marked partially agree, a short signed statement itemizing what is right and wrong, and a document for each disputed item. | Expect a recomputed proposal months later. Ask for the accuracy penalty to be removed separately, with your reasonable-cause facts. |
| Disagree | The response form marked disagree, a point-by-point statement, and proof: basis statements, rollover confirmations, QCD receipts, a corrected 1099. | Silence from the IRS is not agreement; follow up. If a CP3219A arrives anyway, calendar its date immediately. |
CP2000 response letter: what to write and what to attach
There is no official letter format, only required information, and the signed response form from the notice goes on top of the stack. Partial agreement is the most common correct answer, so that is the template below. The full versions for agreement, partial agreement and disagreement, with a worked example for each, are in our CP2000 response letter samples.
[Your name] · [Address] · [Daytime phone] · [Date]
Internal Revenue Service · [Address printed on your CP2000]
Re: Notice CP2000 dated [notice date], Tax Year [year] · AUR Control Number [from page 1] · [Your name], SSN ending [last four]
I received the CP2000 referenced above proposing changes to my [year] Form 1040. I partially agree with the proposed changes, and the signed response form is enclosed.
Item I agree with: the $[amount] of [type of income] from [payer] that was omitted from my return.
Item I disagree with: the proposed tax on $[amount] of gross proceeds reported by [broker] on Form 1099-B. The notice treats the full sale proceeds as taxable income. My cost basis in those shares was $[amount], as shown on the enclosed brokerage statement, so the correct taxable gain is $[amount].
Please recompute the proposed tax, the accuracy-related penalty and interest using the corrected figures and send me an updated notice before any assessment.
Sincerely, [Signature] [Printed name]
Enclosures: signed CP2000 response form; brokerage statement showing cost basis and purchase dates; copy of Notice CP2000, page 1
The letter is only as strong as its enclosures. Send copies, never originals, and label each one so it ties to a specific disputed item.
| What the IRS matched | Why the proposed tax is often too high | What to attach |
|---|---|---|
| Form 1099-B stock or fund sale | Basis was not reported, so the full sale price is taxed as gain | Brokerage statement showing cost basis and purchase dates |
| Form 1099-NEC or 1099-K side income | Gross receipts added with zero expenses, and self-employment tax on all of it | A completed Schedule C with expense records, sent with the response, not as an amended return |
| Form 1099-R retirement distribution | A rollover completed within 60 days is not taxable, but the computer cannot see it | Form 5498 or the receiving account's statement showing the rollover deposit |
| Duplicate or wrong-amount 1099 | The payer filed twice or reported the wrong figure | The corrected 1099 from the payer, plus one line of explanation |
| A 1099 that is not yours | Identity theft or a payer SSN error | A statement from the payer if you can get one; Form 14039 if it is identity theft |
| Income already on your return | Reported on a different line than the computer expected | A copy of the return page with the entry highlighted, keyed to the notice's line item |
If you agree with the CP2000 but can't pay
Agreeing and paying are two separate decisions. Sign the agreement so the case closes on the right number, then pick the payment path. The IRS's own instruction is "Get help if you can't pay in full. Apply for a payment plan or offer in compromise." The realistic options, in order of how many people they fit: a short-term plan of up to 180 days with no setup fee. A monthly installment agreement, which for balances up to $50,000 can be set up online without a financial statement; Currently Not Collectible status if paying anything would leave you unable to cover basic living expenses, which pauses collection while interest continues. And a reasonable-cause request to remove the 20% accuracy penalty, which is not covered by first-time abatement and has to be asked for on its own facts. The full walkthrough with the math on each option is in CP2000: agree but can't pay.
What happens if you don't respond to a CP2000
The IRS says it plainly: "If you don't reply or we can't resolve the discrepancy, we may send another notice and a bill." The sequence is automated and runs in order:
- The response date passes. Silence is treated as an unresolved discrepancy, and interest on any tax actually owed keeps running.
- A CP3219A arrives. The CP3219A Statutory Notice of Deficiency is, in the IRS's words, not "a bill or audit" but notice "of a proposed change in your tax." It opens a 90-day response period. You can still send documents with the enclosed Form 5564 and the IRS says it will "work with you to resolve your issue during the 90-day response period," or you can petition the Tax Court by the date on the notice. The IRS warns that "the Tax Court can't consider your case if you file the petition late."
- The tax is assessed. "If we don't hear from you and you don't file a petition, we'll assess the proposed changes and send you a bill." The proposal is now a legal debt. Your dispute rights narrow from prove-your-case-by-mail to pay-first.
- Collection begins. A bill, then the collection notice sequence ending in a final notice of intent to levy. After that the IRS can file a lien, levy bank accounts, and, for retirees, take up to 15% of monthly Social Security benefits through the Federal Payment Levy Program.
Holding a CP2000 with the clock running?
Get it reviewed free before the response date on page 1 passes. A licensed tax professional will say whether to agree, partially agree or dispute, and exactly which document to send for each item.
CP2000 on your transcript: codes 922, 971, 570, 290 and 291
An open underreporter case shows on your IRS account transcript as code 922, often before the CP2000 arrives in the mail. If you check the transcript while the case is open:
| Code | What it means | What to do |
|---|---|---|
| 922 | An underreporter (AUR) review of that tax year has been opened. | Watch the mail for a CP2501 or CP2000 and gather that year's income documents now. |
| 971 | A notice was issued, often the CP2000 itself. | Match the 971 date to the notice date on your letter; the response clock runs from there. |
| 570 | A hold on the account, often freezing any refund while the review is open. | Nothing to fix directly; resolving the CP2000 resolves the hold. |
| 290 | Additional tax was assessed: the case closed against you, or you agreed. | If you never responded, ask about audit reconsideration; if you agreed, arrange payment. |
| 291 | The assessment was reduced: your documentation was accepted. | Keep the closing letter with that year's records. |
When you can handle a CP2000 yourself
Most single-issue CP2000s need no professional help: the notice is right, you missed one 1099. You can pay the balance or set up an online plan. Or the fix is one clean document, a broker statement showing basis or a custodian letter confirming a rollover. Experienced help changes outcomes in a narrower set of cases: a CP3219A has already arrived and the 90-day clock is running. More than one tax year has an open case. The mismatch involves self-employment income, where the computer adds SE tax on gross receipts. A 1099 in your name is identity theft or someone else's. Or the balance is unpayable on a fixed income and the real question is hardship status versus a plan. If the IRS misses its own timelines while you have met yours and the case stalls for many months, the Taxpayer Advocate Service exists for that.
Terms on your CP2000, decoded
- AUR (Automated Underreporter): the IRS program that matches payer-reported income against tax returns and generates CP2000s. No human examiner is involved.
- Proposed amount due: the tax, penalty and interest the IRS suggests you owe. Not an assessed debt until you agree or the dispute windows close.
- Response form: the page inside your CP2000 where you mark agree, partially agree or disagree. It is the correct way to answer the notice.
- Accuracy-related penalty: a 20% penalty under IRC section 6662 for substantial understatement, removable on a reasonable-cause showing.
- Statutory Notice of Deficiency (CP3219A): the notice that can follow an unresolved CP2000. It opens a 90-day period to respond with Form 5564 or to petition the Tax Court. The full IRS explainer for the CP2000 is at Understanding your CP2000 notice.
CP2000 questions, answered
What is a CP2000 notice from the IRS?
A CP2000 is the notice the IRS sends when the income reported to it by employers, banks and brokers does not match what you reported on your return. It proposes additional tax, and sometimes a penalty and interest, based on that mismatch. In the IRS's own words it "isn't a bill," and it is not an audit. It comes from a computer matching program called the Automated Underreporter.
Is a CP2000 notice an audit?
No. A CP2000 comes from the IRS's Automated Underreporter program, a computer document-matching process, not an examination of your books and records. No auditor is assigned, and responding does not open an audit. It can still add real tax and penalties, so the response deadline matters.
Is a CP2000 a bill?
No. The IRS page on the notice says, "This notice isn't a bill and your response may be required." Nothing is assessed until you agree or the dispute windows close. If you agree, the IRS assesses the amount and a bill follows. If you disagree, nothing is owed while the dispute is open, although interest accrues on any tax that is ultimately owed.
How long do I have to respond to a CP2000?
Until the response date printed on page 1 of the notice, which is typically 30 days from the notice date. Use the printed date rather than your own count. If you cannot gather documents in time, a mailed response postmarked by the date protects you, and you can send additional information afterward. Missing the date does not end the case, but it moves it toward a CP3219A.
Should I file an amended return to answer a CP2000?
No. The IRS says that if you agree, "You don't need to amend your return," and if you disagree, you complete and sign the response form and include documentation. Filing a Form 1040-X alongside an open underreporter case creates a second file and can delay resolution by months. Explain any corrections in your response instead.
What happens if I ignore a CP2000 notice?
The IRS says, "If you don't reply or we can't resolve the discrepancy, we may send another notice and a bill." In practice the next notice is usually a CP3219A Statutory Notice of Deficiency, which opens a 90-day period to respond or petition the Tax Court. If that passes with no response, the IRS assesses the proposed tax, sends a bill, and the collection sequence begins.
Can I just pay the amount on my CP2000?
You can, but verify the numbers first. Proposals routinely overstate tax, most often because a 1099-B is taxed at gross proceeds with no cost basis or a rollover is counted as a taxable distribution. Match each line item against your records before paying; agreeing to an overstated amount is hard to unwind later.
Does a CP2000 include penalties?
Often, yes. Many CP2000s propose a 20% accuracy-related penalty for substantial understatement, and interest runs from the original due date of the return. The accuracy penalty can be contested with a reasonable-cause explanation, for example that you relied on a payer's incorrect form, so address it directly in your response rather than accepting it by default.
What is the difference between a CP2501 and a CP2000?
A CP2501 is the opening question. It flags a mismatch and asks you to explain, usually without computing a full proposed tax. A CP2000 goes further and calculates specific additional tax, penalty and interest. Some cases start at CP2501 and escalate; others go straight to CP2000. Both come from the same program and use the same response process.
How do I know my CP2000 is real and not a scam?
A genuine CP2000 arrives by postal mail, shows the tax year and a notice date, and directs payment only to the United States Treasury or IRS.gov. The IRS will not email, text or call you about it first. You can confirm the case exists in your IRS online account or on your transcript, where an open underreporter review typically appears as code 922.
Your next 24 hours
- Find the two dates on page 1 of your CP2000, the notice date and the response deadline, plus the tax year it covers, and write the deadline where you will see it.
- Gather that year's paperwork: your filed return and every 1099-R, 1099-B, 1099-INT, 1099-DIV, W-2 and SSA-1099, especially any statement showing cost basis, a rollover or a QCD.
- Get a free case review before the response date: the 2-minute form at claritytaxrelief.com/#consult or (888) 825-7779. One call tells you whether to agree, partially agree or dispute, while all three doors are still open.
This guide is general information, not tax or legal advice for your specific situation. Eligibility for IRS programs depends on individual facts and circumstances; no outcome is guaranteed.