Everything You Need to Know About NICS Background Checks
Every firearm sold by a Federal Firearms Licensee in the United States goes through the same checkpoint: the NICS background check. It's the step between a completed Form 4473 and a transferred firearm — and it's the step where most FFLs lose the most time, deal with the most confusion, and make the most avoidable errors.
This guide covers how NICS works, what happens behind the scenes when you submit a check, the three possible outcomes and what each one means for your transaction, how to handle delays and denials, the Brady Transfer Date rule, state point of contact systems, and how digital 4473 software eliminates the double entry that slows the process down.
What is NICS?
NICS stands for the National Instant Criminal Background Check System. It is a database and call center operated by the FBI's Criminal Justice Information Services (CJIS) Division in Clarksburg, West Virginia. NICS was established by the Brady Handgun Violence Prevention Act of 1993 and became operational on November 30, 1998.
The system's purpose is simple: determine whether a prospective buyer is legally eligible to receive a firearm under federal and state law. When an FFL submits a background check, NICS searches three databases:
NICS Index — a database maintained by the FBI containing records of individuals who are prohibited from possessing firearms, including mental health adjudications, dishonorable discharges, and other disqualifying records that may not appear in other databases
Interstate Identification Index (III) — a national criminal history record system containing arrest and conviction records from all 50 states
National Crime Information Center (NCIC) — a database of active warrants, protection orders, immigration violations, and other law enforcement records
The search runs the buyer's name, date of birth, and other identifying information from the completed Form 4473 against these databases. The entire process is designed to take seconds — though it doesn't always work out that way.
How the NICS check process works for FFLs
Here's the step-by-step workflow from the FFL's perspective:
Step 1: Customer completes Form 4473
The buyer fills out their sections of ATF Form 4473, including full legal name, date of birth, address, identification, and the series of eligibility questions. The FFL reviews the form for completeness and accuracy. For a detailed walkthrough, see our step-by-step guide to filling out Form 4473.
Step 2: FFL submits the NICS check
The FFL contacts NICS using one of two methods:
NICS E-Check — an online portal where FFLs enter the buyer's information and submit the check electronically. This is the most common method and is available 24/7 (with some scheduled maintenance windows).
NICS call center — FFLs can call the FBI's NICS Operations Center directly. Call center hours are typically 9:00 AM to 2:00 AM Eastern, 7 days a week.
The FFL enters the buyer's information from the completed Form 4473 — name, date of birth, sex, race, state of residence, Social Security Number (if provided), and identification details. NICS processes the request and returns a result.
Step 3: FFL receives the result
NICS returns one of three responses: Proceed, Delayed, or Denied. Each response triggers a different procedure for the FFL.
Step 4: FFL records the result
The FFL records the NICS Transaction Number (NTN), the date NICS was contacted, and the response on the Form 4473. This documentation is required and is one of the most commonly cited fields during ATF inspections.
Eliminating double entry: With paper 4473 forms, the FFL has to manually re-enter the buyer's information from the handwritten form into the NICS E-Check portal — a process that introduces transcription errors and takes time. E4473's NICS integration eliminates this entirely. The buyer's data from the completed digital form flows directly into the NICS submission. No re-typing, no transcription errors, no second system. The result appears in your FFL dashboard in real time.
The three NICS outcomes explained
Proceed
The buyer is cleared. The NICS check returned no disqualifying records, and the FFL may complete the transfer immediately.
Approximately 91% of NICS checks result in an immediate Proceed response. In most cases, the result comes back within seconds of submission.
A Proceed response is valid for 30 calendar days from the date the check was initiated. If the transfer doesn't happen within 30 days, a new NICS check must be conducted.
Delayed
NICS has found a potential match in one or more databases that requires additional research. The check is placed in a pending status while FBI examiners review the records manually.
About 8% of NICS checks result in a Delayed response. Delays are often caused by common names matching records in the system, incomplete state records, or records that require manual verification (such as old arrests without final disposition).
When a check is delayed, the FBI has three federal business days to make a final determination. During this period, the FFL cannot complete the transfer. After three business days, one of two things happens:
The FBI issues a final determination — either Proceed or Denied
The FBI does not respond — this triggers the Brady Transfer Date (see below)
Denied
The NICS check returned one or more disqualifying records. The buyer is prohibited from receiving a firearm, and the FFL must not complete the transfer.
Approximately 1.5% of NICS checks result in a Denied response.
When a transaction is denied:
The FFL records the denial on the Form 4473
The firearm is not transferred
The completed Form 4473 must still be retained — denied forms have a retention requirement of at least 5 years (or 20 years if you're using digital storage where all forms are retained together)
If using digital storage, denied transactions must be segregated from completed transactions, as required by the ATF
The buyer has the right to appeal the denial directly with the FBI's NICS Section
The Brady Transfer Date explained
The Brady Transfer Date — sometimes called the "default proceed" rule — is one of the most misunderstood aspects of the NICS system.
Here's how it works: if a NICS check is delayed and the FBI does not issue a final determination within three federal business days, the FFL may (but is not required to) proceed with the transfer at their discretion. The three-day clock starts the day after the check was submitted and counts only federal business days (excluding weekends and federal holidays).
Example: You submit a NICS check on Monday. The three-business-day window is Tuesday, Wednesday, Thursday. If the FBI hasn't responded by the end of business Thursday, you may proceed with the transfer starting Friday.
Important considerations:
"May proceed" is not "must proceed." Many FFLs choose to wait for a definitive answer rather than exercise the default proceed option. This is a business decision, not a legal requirement.
If the FBI later issues a denial after you've transferred the firearm, the ATF may send a retrieval request. This is why some FFLs prefer to wait.
State laws may override the federal rule. Some states have their own waiting period requirements that extend beyond the three-day federal window.
The FFL must still document the Brady Transfer Date on the Form 4473 if they choose to proceed without a final NICS determination.
Extended delays for buyers under 21
The Bipartisan Safer Communities Act (2022) created an additional review process for buyers aged 18–20. When a NICS check for a buyer under 21 is delayed, the review period is extended to 10 business days (instead of three) to allow time for a search of juvenile and mental health records that may not appear in standard NICS databases.
During this 10-day window:
The FBI contacts the buyer's state of residence and state of any known prior residences to search for potentially disqualifying juvenile records
If no disqualifying records are found within 10 business days, the FFL may proceed with the transfer
The FFL must document this extended review on the Form 4473
State point of contact (POC) systems
Not every NICS check goes through the FBI directly. Some states operate their own Point of Contact (POC) system, where the state serves as the intermediary between the FFL and NICS.
Full POC states
In full POC states, the FFL contacts the state agency (not the FBI) for all firearm transactions. The state agency conducts the NICS check and may also check additional state-level databases. As of 2026, full POC states include Colorado, Connecticut, Florida, Hawaii, Illinois, Nevada, New Jersey, Oregon, Pennsylvania, Tennessee, Utah, and Virginia, among others.
Partial POC states
Some states are partial POC — meaning they handle NICS checks for handguns but route long gun (rifle/shotgun) checks directly to the FBI. States with partial POC systems include California, Maryland, and Washington, among others.
Non-POC states
In non-POC states, the FFL contacts the FBI's NICS Operations Center directly for all transactions.
Why it matters for FFLs
The POC system affects your workflow. If you're in a POC state, you submit checks through your state's system instead of (or in addition to) the FBI's E-Check portal. Processing times, procedures, and even fees can vary by state. Make sure you know which system applies to your state and that your staff is trained accordingly.
With E4473, the NICS submission process accounts for your state's requirements — whether you're in a full POC, partial POC, or non-POC state.
NICS operating hours and availability
The FBI's NICS E-Check system is available online 24 hours a day, 7 days a week, with periodic scheduled maintenance. The NICS call center operates on a more limited schedule — typically 9:00 AM to 2:00 AM Eastern Time, 7 days a week including holidays (with reduced hours on some holidays).
State POC systems have their own operating hours, which may be more limited. Some state systems are only available during regular business hours on weekdays.
If NICS is temporarily unavailable due to system outages, the FFL cannot complete the transfer until a check is successfully submitted and a result is received. There is no exception for system downtime.
Common NICS-related mistakes FFLs make
Even experienced FFLs make errors when it comes to NICS documentation. These are the ones that get cited during ATF inspections:
Failure to record the NICS Transaction Number
Every Form 4473 must include the NTN (or state equivalent) from the background check. This is one of the most frequently missing fields on 4473s reviewed during inspections. With E4473, the NTN is recorded automatically from the integrated NICS submission — no manual entry required.
Failure to record the date NICS was contacted
The date you contacted NICS must be recorded on the form. This is separate from the date of transfer and separate from the date the buyer signed. Inspectors check this field on every form.
Proceeding on a denied transaction
Completing a transfer after receiving a Denied response is a serious violation. It sounds obvious, but it happens — particularly in high-volume stores where multiple transactions are being processed simultaneously and a denial result is missed or misread.
Transferring before the Brady date on a delayed check
If a check is delayed, you must wait the full three business days before exercising the default proceed option. Transferring a firearm on day two of a delay is a violation.
Not conducting a new check after 30 days
A Proceed result is only valid for 30 calendar days. If the buyer doesn't pick up the firearm within that window, you must run a new NICS check before completing the transfer. This commonly occurs with layaway purchases and online transfers where the buyer is slow to pick up.
Re-entering information incorrectly
When using paper forms with the NICS E-Check portal, FFLs frequently introduce transcription errors — misspelled names, transposed digits in dates of birth, wrong identification numbers. These errors can cause unnecessary delays or, worse, result in a Proceed for a person who should have been denied. E4473's NICS integration eliminates transcription errors by auto-populating the submission from the completed digital form.
How NICS data flows in a digital 4473 system
With a paper-based process, NICS is a separate step — a separate system with separate data entry. Here's how it typically works:
Customer fills out paper Form 4473
FFL reads handwritten answers and manually types them into NICS E-Check
NICS returns a result
FFL writes the NTN and result back onto the paper form
FFL files the paper form
Every handoff in that chain is an opportunity for error. Misspelled names, transposed birth dates, and forgotten NTNs are built into the process.
With E4473, the workflow collapses into a single system:
Customer completes the digital 4473 on their device
FFL reviews the form on their dashboard
FFL submits the NICS check directly from E4473 — buyer data auto-populates
NICS result and NTN are recorded automatically in the transaction record
Completed form is stored digitally in Cloud Storage
No re-typing. No transcription. No writing NTNs on paper. The data flows from the buyer's fingertips to NICS and back into your records without ever being manually re-entered.
NICS by the numbers
~27 million — approximate number of NICS checks conducted in a typical recent year
91% — percentage of checks that result in an immediate Proceed
~8% — percentage that are Delayed for additional research
~1.5% — percentage that result in a Denial
58 seconds — average processing time for a standard NICS E-Check
30 days — validity period of a Proceed result before a new check is required
3 business days — the federal window before the Brady Transfer Date applies
10 business days — the extended review period for buyers under 21
The bottom line
NICS is the gatekeeper of every firearm transaction in the country. For FFLs, it's not just a step in the process — it's a compliance requirement with specific documentation standards that the ATF checks during every inspection.
The most common NICS-related violations — missing NTNs, undocumented contact dates, transcription errors — are all preventable. They're artifacts of a paper-based workflow that requires the same information to be written down, read, re-entered, and written down again.
Digital 4473 systems eliminate the re-entry entirely. The buyer's information flows from the form to the NICS check and back into the record in a single, integrated process. That's not just faster — it's measurably more accurate, and it produces cleaner records that hold up during inspections.
See it in action: E4473's NICS integration submits background checks directly from the completed digital form — no double entry, no transcription errors, no missing NTNs. Schedule a demo to see how it works for your store.