Each year, the Internal Revenue Service publishes its "Dirty Dozen" — a list of the twelve most dangerous tax scams targeting American taxpayers, businesses, and tax professionals. The 2026 edition was released on March 5, 2026, coinciding with National Slam the Scam Day, and it carries a sobering new theme: artificial intelligence is making scams harder to detect than ever before.
"Thieves continuously adjust the pitches they use to take advantage of honest taxpayers," said IRS Chief Executive Officer Frank J. Bisignano at the announcement. "For more than two decades, the IRS has used the Dirty Dozen list to flag emerging scams that taxpayers should watch out for."
What's New on the 2026 List
The biggest change to this year's Dirty Dozen is the addition of abusive undistributed long-term capital gains claims — a scheme involving fraudulent or overstated claims on IRS Form 2439 (Notice to Shareholder of Undistributed Long-Term Capital Gains). Promoters pitch these as refundable credit opportunities, but the IRS has seen a sharp rise in fabricated claims that trigger audits, penalties, and refund delays.
The 2026 list also reflects a significant uptick in AI-driven fraud. Scammers are now using deepfake voices, voice mimicry, and AI-generated text to make their schemes feel frighteningly legitimate.
The 2026 Dirty Dozen: All 12 Scams Explained
1. IRS Impersonation by Email and Text (Phishing and Smishing)
Fraudsters send emails, text messages, and direct messages pretending to be the IRS. They often use alarming language — threatening legal action or promising large refunds — and include links to fake IRS websites designed to steal your Social Security number, banking details, or login credentials. The IRS logged more than 600 social media impersonators in fiscal year 2025 alone. The golden rule: the IRS initiates contact by mail, not email or text. Never click an unsolicited link claiming to be from the IRS.
2. AI-Enabled IRS Impersonation by Phone
This is the scam that's evolving fastest. Fraudsters now use AI-generated voices, robocalls, and spoofed caller IDs to sound like real IRS agents. They may reference your real name or partial Social Security number obtained from data breaches. The IRS does not demand immediate payment over the phone, threaten arrest, or require payment via gift cards or wire transfers. If you receive such a call, hang up.
3. Fake Charities
Scammers create phony nonprofit organizations — often with names similar to legitimate charities — to collect donations and personal information. They're especially active after natural disasters when public generosity is high. Before donating, verify any charity using the IRS's Tax Exempt Organization Search tool at IRS.gov.
4. Misleading Tax Advice on Social Media
Viral tax "tips" on TikTok, Instagram, and YouTube are frequently wrong — and sometimes deliberately fraudulent. Common false claims include advice to report fake business losses, claim credits you're not eligible for, or misuse Form 1099-NEC. Following bad social media tax advice can result in penalties, back taxes owed, and potentially criminal charges. Always verify tax strategies with a licensed CPA or the official IRS.gov website.
5. "Ghost" Tax Preparers
A ghost preparer is someone who prepares your tax return for a fee but refuses to sign it. By law, all paid tax preparers must include their Preparer Tax Identification Number (PTIN) and sign returns they prepare. Ghost preparers often inflate deductions, fabricate credits, or claim refunds they pocket themselves. Check that your preparer has a valid PTIN at IRS.gov before handing over any financial documents.
6. Abusive Undistributed Long-Term Capital Gains Claims (New in 2026)
This new addition involves fraudulent claims tied to Form 2439, which reports undistributed long-term capital gains from regulated investment companies (like mutual funds) or REITs. Promoters falsely pitch these as opportunities to claim refundable tax credits. The IRS has seen a sharp increase in overstated and completely fabricated claims. Be extremely skeptical of any promoter offering tax credits from "undistributed gains" from funds you don't recognize.
7. Overstated Withholding Schemes
Scammers instruct taxpayers to submit returns claiming far more withholding than they actually had — essentially making up income on fake W-2s to manufacture an inflated refund. Beyond the obvious fraud risk, this triggers IRS scrutiny, processing delays, and potential criminal prosecution. If your preparer suggests reporting income you didn't earn, walk away immediately.
8. Fake Business Tax Credits
Fraudulent promoters continue to market bogus business tax credits to small business owners, particularly around fuel tax credits and certain pandemic-era claims that have since expired. The IRS specifically warns about promoters claiming businesses qualify for the Employee Retention Credit (ERC) when they clearly do not. An ERC claim that was improperly filed can now be corrected through a new IRS streamlined process rather than proceeding to litigation.
9. Offer in Compromise Mills
Legitimate IRS Offer in Compromise programs allow qualifying taxpayers who genuinely cannot pay their full tax debt to settle for less. "OIC mills" are companies that charge large upfront fees and promise to settle anyone's tax debt for "pennies on the dollar" — regardless of the taxpayer's actual eligibility. The IRS's own pre-qualifier tool at IRS.gov is free and takes only minutes to use.
10. Syndicated Conservation Easement Transactions
These involve complex real estate arrangements where promoters claim inflated tax deductions for placing land under a conservation easement. The IRS has pursued these aggressively as abusive tax shelters for years. In May 2026, the IRS announced a time-limited settlement opportunity for taxpayers currently in conservation easement disputes — which itself underscores how seriously these cases are being pursued.
11. High-Income Tax Evasion Schemes
The IRS continues to crack down on arrangements that allow high-income taxpayers to hide wealth in offshore accounts, complex partnerships, and pass-through entities. The agency has significantly increased audit rates for high earners in recent years using improved data analytics.
12. Spear Phishing Attacks Targeting Tax Professionals
Unlike mass phishing emails, spear phishing is highly targeted. Fraudsters research tax preparers and their clients, then send convincingly personalized emails designed to steal client data in bulk. A single compromised tax professional can expose hundreds of clients' Social Security numbers and financial records. Tax professionals should use multi-factor authentication on all accounts and never send client data via standard email.
How the IRS Will Actually Contact You
Knowing how the IRS really operates is the best defense against impersonation scams. The IRS will:
- Send written notice by U.S. mail first, before any phone contact
- Never demand immediate payment without giving you time to question or appeal
- Never require payment by gift card, wire transfer, or cryptocurrency
- Never threaten to send police or immigration agents for non-payment
- Never ask for credit or debit card numbers over the phone
What to Do If You've Been Targeted
The IRS launched a new centralized fraud-reporting web page in 2026 that allows taxpayers to confidentially report suspected tax fraud, scams, or evasion. If you receive a suspicious IRS impersonation call, you can also report it to the Treasury Inspector General for Tax Administration (TIGTA) at 1-800-366-4484.
Staying informed is your best protection. Bookmark IRS.gov and check it directly whenever you receive any unexpected tax-related communication — don't follow links from emails or texts.
Bottom Line
If a tax offer sounds too good to be true or a communication seems urgent and threatening, treat it with maximum skepticism. Verify directly at IRS.gov before taking any action.