How change of status (Form I-539) works

What the I-539 is

The I-539 asks USCIS to extend a current nonimmigrant status or switch to a different nonimmigrant category while the person remains in the United States. A common example is a dependent spouse or child changing into or extending H-4 status. The form is also used by certain other nonimmigrant categories and to add co-applicants such as dependents [Tier 1: USCIS.gov Form I-539 page, uscis.gov/i-539, accessed 2026-06].

It is important to understand what this form does and does not do: it deals with nonimmigrant (temporary) status. It is not a green card application, and being in a valid status is different from being authorized to work, which may require a separate work-permit application (the I-765, covered in a separate guide).

Who files an I-539

In general terms, I-539 filers are people already in the United States in a nonimmigrant status who want to keep that status longer or move to a different temporary category, and who are eligible to do so from inside the country. Some statuses cannot be changed or extended on this form, and some situations require leaving and applying abroad instead.

Whether a specific person can change or extend status, and into what, depends on their current status, how they entered, and the timing. This guide does not make that determination. Timing matters a great deal here, and falling out of status can have serious consequences, so this is an area where talking to a licensed immigration attorney is often worthwhile.

Why timing is the heart of it

Extension and change-of-status requests generally need to be filed before the current authorized stay expires — USCIS suggests filing at least 45 days before, and generally no more than 6 monthsbefore, the expiration date [Tier 1: USCIS.gov, “When to File Your Application” section of the I-539 instructions, uscis.gov/i-539, accessed 2026-06]. As a general rule USCIS will not approve a request from someone who failed to maintain their status or whose status expired before they filed, though USCIS has discretion to excuse a late filing in limited “extraordinary circumstances beyond the applicant's control” [Tier 1: 8 CFR §214.1(c)(4), 8 CFR §214.1, accessed 2026-06]. Filing late, or after a status has lapsed, can change everything about how a request is treated, so confirm the current rules with USCIS rather than relying on a general description.

The steps, in order

1. Confirm the current status and its expiration date and the category being extended or changed into.
2. Prepare the I-539 (and a separate I-539A for certain co-applicants/dependents, where applicable), using the current edition of the form.
3. File with USCIS with the filing fee and supporting evidence. The current filing fee is $470 by mail or $420 online. There is no separate biometric services fee — USCIS exempted it for all I-539 applicants as of October 2023 [Tier 1: USCIS, “USCIS Removes Biometric Services Fee Requirement for Form I-539 Applicants,” uscis.gov newsroom alert, accessed 2026-06]. Some categories are fee-exempt entirely (for example, certain T and U nonimmigrants). Confirm the current amount with the USCIS Fee Calculator.
4. Biometrics, if required.
5. Decision. USCIS approves, denies, or issues a request for more evidence. If a work permit is also needed, that is a separate I-765 application.

How long it takes

Processing times vary by category and workload and shift over time. The official USCIS processing-time tool has the latest estimate for your category [Tier 1: USCIS processing-time tool, accessed 2026-06]. Because the request usually needs to be filed before the current status ends, do not wait on the estimate to plan a filing.

What it costs

The cost is the USCIS filing fee — currently $470 by mail or $420 online — with no separate biometric services fee (exempted since October 2023), and no fee at all for certain exempt categories [Tier 1: USCIS Fee Schedule (Form G-1055), uscis.gov/g-1055, accessed 2026-06]. Confirm your figure with the USCIS Fee Calculator. Any preparation cost is separate from the government fee.

When you may want an attorney

Because the consequences of a gap in status can be serious, and because not every status can be changed or extended on this form, anyone whose status has lapsed, who entered in a way that complicates a change, or who is unsure whether their category is eligible should consider speaking with a licensed immigration attorney. ImFiled is a document preparation service, not a law firm, and will flag when a situation looks like it needs an attorney.