IRS Notices
CP2000 Response Letter Sample (2026): A Free Template You Can Copy
The short answer: below is a free CP2000 response letter sample you can copy and adapt. Mark the response page that came with your notice to agree or disagree, attach a short letter plus copies of your proof, sign it, and mail or upload it by the 30-day deadline printed on the notice.
⏱ Your deadline: generally 30 days from the date on the CP2000 (60 days if your address is outside the U.S.). If you need longer to gather documents, call the number on the notice before the deadline and ask for more time. Miss it and the IRS can issue a CP3219A Notice of Deficiency.
What a CP2000 actually is
A CP2000 is not a bill and it's not an audit. It's a proposed change. The IRS's computers compared the income reported on your tax return with what employers, banks, and brokerages reported about you — and the numbers didn't match. The notice shows the difference and proposes new tax, and often penalties and interest, on top.
The word "proposed" is the most important word on the page. Nothing is final yet. You have a right to respond, and a clear CP2000 response letter sample makes that response far easier to write. If you want the full background on the notice itself, see our CP2000 notice guide and the IRS's own page, Understanding your CP2000 series notice.
Why the IRS sent it
Common triggers for a CP2000 include:
- A 1099 for freelance or gig income you forgot to report.
- Stock or crypto sales where the IRS sees the sale price but not your cost basis — so it assumes your whole sale was profit.
- Interest, dividends, or retirement distributions left off the return.
- A duplicate or incorrect form a payer sent both to you and to the IRS.
Sometimes the IRS is right and you simply owe the tax. Sometimes the notice is wrong because it's missing your side of the story — like the cost basis on an investment. Either way, you respond. You just respond differently.
What happens if you ignore it
The CP2000 is part of an automated sequence. Letting the deadline pass doesn't make it disappear — it moves you to the next, harder step:
- CP2000 — proposed change. You are here. You can still agree, partly agree, or disagree with full appeal rights.
- CP2000 follow-up / extension — if you asked for time or sent a partial response, the IRS may reply or request more.
- CP3219A — Notice of Deficiency — the "90-day letter." Once this arrives, the proposed tax becomes a formal assessment unless you petition the U.S. Tax Court within 90 days. See our CP3219A Notice of Deficiency guide.
- Balance due + collection notices — once the tax is assessed, the IRS bills you and the collection sequence (CP14, CP501, CP503, CP504) begins.
The takeaway: a CP2000 is the easiest and cheapest moment to fix this. Every step after it gives you fewer options.
CP2000 response letter sample (copy and adapt)
Use this template only as a starting point. Swap in your real figures, attach your proof, and keep your tone factual. Pick the version that matches your situation.
If you disagree with all or part of the notice
[Your name]
[Your address]
[Your phone number]
[Date]
Internal Revenue Service
[Use the exact address printed on your CP2000]
Re: Response to Notice CP2000
Notice date: [date on notice]
Tax year: [year]
Taxpayer name(s): [name(s) on the return]
Social Security Number / Taxpayer ID: [last 4 digits only if writing for your records]
To Whom It May Concern:
I am responding to the CP2000 notice dated [date] for tax year [year]. I have reviewed the proposed changes and I disagree, in part, with the amount due for the following reason(s):
The notice proposes additional tax on [describe the item, e.g., "the sale of stock reported on Form 1099-B from [brokerage]"]. The notice does not reflect my cost basis of $[amount], which reduces the taxable gain. I have enclosed [list documents, e.g., "the brokerage statement showing the purchase price and date"] as proof.
Based on the enclosed documents, I believe the correct additional tax is $[amount], rather than the $[amount] proposed.
I have marked the enclosed response page to indicate that I do not agree with all of the proposed changes, and I have signed and dated it. Please review the enclosed documentation and adjust the proposed amount accordingly. If you need anything further, you may reach me at [phone number].
Sincerely,
[Signature]
[Printed name]
Enclosures: signed CP2000 response page; [list each document]
If you agree with the notice
[Your name and address]
[Date]
Re: Response to Notice CP2000 — Agreement
Notice date: [date] · Tax year: [year]
To Whom It May Concern:
I have reviewed the CP2000 notice dated [date] for tax year [year] and I agree with the proposed changes. I have signed and enclosed the response page indicating my agreement.
[Choose one:] Enclosed is my payment of $[amount]. — or — I am unable to pay the full balance at this time and would like to request a payment arrangement; please send instructions, or I will apply online at IRS.gov/payments.
Sincerely,
[Signature and printed name]
Enclosures: signed CP2000 response page; [payment, if any]
How to respond, step by step
- Read the whole notice. Find the response deadline, the proposed amount, and the specific income items the IRS flagged. Each item is listed separately, so you can agree with some and disagree with others.
- Pull your records. Compare each flagged item to your own forms. Log into your IRS online account to see the income forms the IRS has on file for you.
- Decide: agree, partly agree, or disagree. Mark the response page that came with the notice to match. Sign and date it.
- Write your letter. Use the CP2000 response letter sample above. Be brief and factual. Reference each document by name.
- Attach copies, never originals. Write your name, the tax year, and the notice number on every page so nothing gets separated.
- Send it on time. Mail to the exact address on the notice (use certified mail and keep the receipt), or upload through the link on the notice if one is provided. Keep a full copy for your records.
- If you need more time, call the number on the notice before the deadline and request an extension.
Confirm where to send everything on the IRS page, Understanding your CP2000 series notice. If you ever feel stuck in the system, the independent Taxpayer Advocate Service can help.
Not sure if the CP2000 is right?
Send us a photo of your notice. An experienced tax professional will review the proposed changes, tell you whether to agree or fight it, and help you write the response — free, confidential, no pressure.
A quick worked example
Say your CP2000 proposes $4,100 in extra tax because the IRS saw a $20,000 stock sale on a 1099-B but no cost basis. If your brokerage statement shows you actually paid $17,500 for those shares, your real gain is $2,500 — not $20,000. Attach that statement, and the taxable amount drops dramatically. Same notice, very different result, because you supplied the missing half of the story. This is exactly why you respond instead of paying the first number you see.
CP2000 response questions, answered
Do I have to use a special form to respond to a CP2000?
No. The CP2000 comes with its own response page that you mark to agree or disagree, sign, and return. A separate letter is optional but smart when you disagree — it lets you explain your position in plain English and list the documents you're attaching. Always send the notice's response page along with your letter.
How long do I have to respond to a CP2000?
You generally have 30 days from the date printed on the notice — 60 days if your address is outside the United States. If you can't gather your documents in time, call the number on the notice and ask for more time before the deadline passes. Missing it can lead to a CP3219A Notice of Deficiency.
What should I attach to my CP2000 response letter?
Attach copies — never originals — of anything that proves your numbers: corrected 1099s, brokerage statements showing your cost basis, receipts for deductible expenses, or a Form 1040-X if you're amending. Include the signed response page from the notice and write your name, the tax year, and the notice number on every page.
What happens if I agree with the CP2000 but can't pay?
Sign and return the agreement page so the IRS can finalize the balance, then set up a payment option. Depending on your situation you may qualify for a short-term plan, a monthly installment agreement, hardship status, or penalty relief. You don't have to pay in full to respond on time.
Will a CP2000 response stop the extra tax automatically?
Not automatically. The IRS reviews what you send and replies — sometimes agreeing, sometimes asking for more, sometimes standing firm. A clear letter with solid proof gives you the best chance. If the IRS disagrees, you still have appeal rights, including responding to a later Notice of Deficiency.
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.