IRS Statute of Limitations Tracker 2026 β 3/6/10-Year Rules
Track IRS assessment (3/6-year), collection (10-year), and refund claim (3-year) deadlines from your return filing date. See days remaining for each window.
Date you actually filed (or due date, whichever is later)
Date IRS assessed the tax (optional β for collection SOL)
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Assessment Deadline
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Collection Deadline (CSED)
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Refund Claim Deadline
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Audit Window
Statute of Limitations Timeline
| Statute Type | Period | Deadline Date | Days Remaining | Status |
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How to Use This IRS Statute of Limitations Tracker
Enter your return filing date and select any special circumstances (substantial omission, fraud, or no return filed). The calculator computes the exact deadline dates for IRS assessment, collection, and your refund claim window, plus shows how many days remain.
Key IRC Statutes
Β§6501(a): 3-year assessment (standard)
Β§6501(e): 6-year assessment (25%+ income omission)
Β§6501(c)(1): Unlimited β fraud or false return
Β§6501(c)(3): Unlimited β no return filed
Β§6502: 10-year collection from assessment date
Β§6511: 3-year refund claim (from filing date or 2-year from payment)
Filing Extension (Form 4868): shifts filing date but NOT due date for SOL purposes
Β§6501(e): 6-year assessment (25%+ income omission)
Β§6501(c)(1): Unlimited β fraud or false return
Β§6501(c)(3): Unlimited β no return filed
Β§6502: 10-year collection from assessment date
Β§6511: 3-year refund claim (from filing date or 2-year from payment)
Filing Extension (Form 4868): shifts filing date but NOT due date for SOL purposes
Example
Filed 2022 Form 1040 on April 15, 2023, no omissions:
Assessment deadline: April 15, 2026 (3 years from filing)
Refund claim deadline: April 15, 2026 (3 years from filing)
Assessment date: Assume July 1, 2024 for deficiency
Collection deadline: July 1, 2034 (10 years from assessment)
If you did not keep records: April 15, 2026 is the critical date
Assessment deadline: April 15, 2026 (3 years from filing)
Refund claim deadline: April 15, 2026 (3 years from filing)
Assessment date: Assume July 1, 2024 for deficiency
Collection deadline: July 1, 2034 (10 years from assessment)
If you did not keep records: April 15, 2026 is the critical date
Extended
Exception Analysis + State SOL Comparison
Fraud/offshore exceptions, extension tolling events, and state comparison
Exception and Extension Events (Tolling)
| Event | SOL Effect | Citation |
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State Statute of Limitations Comparison (Common States)
| State | Assessment SOL | Collection SOL | Notes |
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Frequently Asked Questions
What is the standard IRS statute of limitations for assessment?
Under IRC Β§6501, the IRS generally has 3 years from the later of: (1) the date you filed the return, or (2) the original due date of the return (usually April 15), to assess additional taxes. This 3-year window is the standard assessment period. After it closes, the IRS cannot assess additional taxes unless an exception applies (substantial omission, fraud, or failure to file).
When does the 6-year statute of limitations apply?
The 6-year assessment period (IRC Β§6501(e)) applies when you omit more than 25% of gross income from your return. For example, if your gross income was $200,000 but you reported only $140,000, you omitted $60,000 which is 30% β the 6-year rule would apply. It also applies for omissions related to foreign assets in certain cases. The 6-year period begins from the filing date of the return (not the return due date if filed late).
Is there a time limit for the IRS to collect taxes it has already assessed?
Yes. Under IRC Β§6502, the IRS has 10 years from the date of assessment to collect a tax liability through levies, liens, or legal proceedings. This 10-year collection statute can be extended (tolled) by: filing for bankruptcy, submitting an Installment Agreement request, Offer in Compromise consideration, pending Collection Due Process hearing, or voluntary agreement (Form 900). The Collection Statute Expiration Date (CSED) is often a strategic consideration in tax resolution cases.
How long do I have to claim a tax refund?
Under IRC Β§6511, you generally have the shorter of: (1) 3 years from the date you filed the return, or (2) 2 years from the date you paid the tax. Most taxpayers use the 3-year rule. If you file an amended return (Form 1040-X) to claim a refund, it must be filed within 3 years of the original return due date (not the date you actually filed, unless you filed late). Refund claims after this period are permanently barred regardless of merit.
Is there a statute of limitations for tax fraud or unfiled returns?
No. The IRS has unlimited time to assess tax in two situations: (1) when you file a false or fraudulent return with intent to evade tax (IRC Β§6501(c)(1)); (2) when you fail to file a return at all (IRC Β§6501(c)(3)). This means the IRS can audit you decades later for years where fraud occurred or no return was filed. For foreign asset omissions (offshore accounts, FBAR violations, Form 5471), the statute may also be extended to 6 years even without fraud if certain international reporting forms were not filed.