What this site is
OverstayCheck helps people understand where they stand when their authorized stay in the United States has ended or is about to. It combines a calculator with guides on the questions people most often ask: what an I-94 is, how unlawful presence is counted, when the 3-year and 10-year bars apply, and what options exist.
It is an independent project. It is not a law firm, it does not provide legal advice, and it is not affiliated with USCIS, CBP, DHS or any government agency.
How the calculator works
- You enter the “Admit Until Date” from your I-94 record.
- The calculator counts the whole days between that date and today, in your local time zone.
- It compares the result with the statutory thresholds: 180 days or fewer, 181 to 364 days (more than 180 days, less than a year), and 365 days or more of unlawful presence.
- It shows which range applies, how far you are from the next one, and which guides are relevant.
The calculation runs entirely in your browser. The date you enter is not sent to our servers and is not stored.
Where the rules come from
- The 3-year and 10-year bars are set by Section 212(a)(9)(B) of the Immigration and Nationality Act (8 U.S.C. §1182).
- Your authorized stay is the date on your I-94 record, which you can look up on the CBP I-94 website.
- Extension rules are explained by USCIS (Form I-539).
What it cannot tell you
The calculator applies the standard thresholds, and it is not designed for people whose I-94 says “D/S”, such as many F-1 and J-1 holders. Real cases often involve exceptions it cannot see: a timely pending extension or change of status, TPS, asylum applications, age under 18, certain waivers, and more. Rules and USCIS policy also change over time.
Corrections
Found something out of date or wrong? We want to fix it. See the contact page. Guides were last updated in October 2026.