What does the National Benefits Center do with my I-485 or N-400?

For cases that need a field office interview, mainly family-based I-485s and N-400s, USCIS says the NBC does the centralized front-end processing. The interview then happens at the field office for where you live.

Is the National Benefits Center a service center?

Not in USCIS's own terms. The USCIS glossary lists six service centers: California, HART, Nebraska, Potomac, Texas and Vermont. The NBC belongs to the Field Operations Directorate, with the field offices.

My receipt number starts with MSC. Is my case at the NBC?

It started there. A USCIS guide lists MSC as the Missouri Service Center, known as the National Benefits Center, and says the prefix shows where a case was first received. Your case may have moved since, for example to a field office for the interview.

How long does the National Benefits Center take?

USCIS publishes no NBC-only time in its data files. National medians from filing to decision were 7 months for a family-based I-485 and 9.5 months for a civilian N-400 (Apr–Jun 2026). The USCIS processing times page shows the times USCIS gives by form and office.

How do I contact the National Benefits Center?

For most cases, through the USCIS Contact Center (800-375-5283) or e-Request. Adoption cases with a SIM case number (I-600A, I-600, I-800A, I-800) have their own NBC Adoptions Unit: nbc.adoptions@uscis.dhs.gov or 877-424-8374.

National Benefits Center (NBC): Forms, Times, Contacts

What the National Benefits Center handles

USCIS places the NBC in its Field Operations Directorate, the part of USCIS that also runs the field offices. According to that directorate’s page, the NBC does two kinds of work:

Kind of work	Forms	What the NBC does
Front-end processing	Mainly family-based I-485 and N-400	Prepares cases that need a field office interview, before the local office interviews you
Decisions to completion	I-765 and I-131	Decides them itself
Decisions to completion	LIFE Act and legalization applications	Decides them itself
Decisions to completion	International adoption: I-600A, I-600, I-800A, I-800	USCIS says it processes most adoption cases at the NBC

Three points to keep in mind:

It does not interview. Interviews happen at field offices. The Policy Manual says an adjustment case should move to the field office for the applicant’s place of residence once it is ready for interview.
It is not one of the six service centers. The USCIS glossary lists California, HART, Nebraska, Potomac, Texas and Vermont. The NBC sits with the field offices, though people often group it with the service centers.
Not the only office for the I-765 and I-131. USCIS’s Service Center Forms Processing chart lists all five service centers for both forms, so yours may be decided elsewhere.

How to know if your case is at the NBC

Your receipt number has 13 characters: three letters and ten numbers. The letters tell you where the case was first received:

Receipt prefix	What it means
NBC	National Benefits Center
MSC	Missouri Service Center, which the USCIS guide says is known as the National Benefits Center
IOE	Electronic filing; the prefix does not name an office
EAC, WAC, LIN, SRC, YSC	Other centers: Vermont, California, Nebraska, Texas and Potomac

Sources: USCIS, Checking Your Case Status Online, and the USCIS Congressional Inquiries Refresher, which says the prefix “identifies where the petition or application was first received for jurisdiction purposes.”

First received is not the same as where the case is now. A family-based I-485 or an N-400 that starts at the NBC usually moves to a field office for the interview. When a case moves, USCIS can show “Case Was Transferred And A New Office Has Jurisdiction” and mail a transfer notice. If your status says Case Is Ready To Be Scheduled For An Interview, the next step is at the field office.

Adoption cases are different: the NBC Adoptions Unit works with case numbers that begin with SIM. Since July 1, 2024, Case Status Online also covers those forms.

Processing times: what you can and cannot get

What exists. USCIS’s quarterly data reports national medians by form, not by center or by the NBC. These are the forms the NBC works on:

Form	National median, filing to decision	Pending nationally	Details
I-485, family	7 months	611,067	I-485 times
N-400, civilian	9.5 months	727,371	N-400 times
I-765, with an I-485	6.4 months	671,362	I-765 times
I-131, advance parole	5.8 months	425,511	I-131 times
I-600, orphan petition	12.2 months	556
I-800, Hague adoptee petition	2.6 months	356

Period: April to June 2026, USCIS All Forms by Quarter. Each median counts only the cases closed that quarter, at any office that handles the form; open cases are left out. The file has no figures for the I-600A or I-800A.

What USCIS reports for the NBC itself. Its I-485 data has one line for the NBC, with decisions in April to June 2026:

I-485 category	Approved	Denied
Family	1,855	2,878
Employment	3,531	993
Humanitarian	45	312
Other	8	21
Total	5,439	4,204

The same line shows zero I-485s received and zero pending at the NBC, so we cannot compute our pending-to-decided indicator for it, and we do not guess why.

What you cannot get. There is no NBC-only processing time in the USCIS data files, and no figure for how long front-end processing takes before a case moves to a field office. USCIS gives its times by form and office on the USCIS processing times page. That page sits behind a security check, so we link it and do not copy it.

If your NBC case is slow

Check the status on Case Status Online, and see where your case is now. If it moved to a field office, the field office times apply: see Houston, Chicago, Newark, Tampa or Los Angeles.
Find out if it is late. USCIS only researches a case once it is past the normal time, which the USCIS processing times page shows by form and office.
Once it is late, report it on e-Request as a case outside normal processing time.
No receipt notice? USCIS says to tell it if you mailed a filing to a service center or the National Benefits Center more than 30 days ago and have no receipt.
Expedite requests go through the Contact Center or your online account. USCIS grants them at its discretion, for reasons on its expedite requests page such as severe financial loss or an urgent humanitarian need. For the I-600A, I-600, I-800A and I-800, send them to the NBC Adoptions Unit instead.
Call the USCIS Contact Center: 800-375-5283 (TTY 800-767-1833), Monday to Friday, 8 a.m. to 8 p.m. Eastern. Have your receipt notice ready.

Adoption cases: the NBC Adoptions Unit

If you filed an I-600A, I-600, I-800A or I-800 and your case number begins with SIM, you, your adoption service provider or your attorney can contact the unit directly:

Email: [email protected]
Phone: 877-424-8374 in the United States, 913-275-5480 from abroad, Monday to Friday, 8 a.m. to 4 p.m. Central.

An adoption service provider needs a privacy disclosure on file, and an attorney or accredited representative needs a Form G-28. Details on the USCIS adoption contact page.

The YourCaseStatus app (coming soon) will alert you when your status changes. Meanwhile, our status index explains each message you can see in Case Status Online.

The other centers

Nebraska (LIN), Texas (SRC), California (WAC), Vermont (EAC) and Potomac (YSC) are USCIS service centers. Service centers do not hold interviews.
Field offices interview the I-485 and N-400 cases the NBC prepares: see Houston, Chicago, Newark, Tampa and Los Angeles.

For every form, see the processing times hub.