I held a Secret clearance as a Navy Diver. The first time I sat in on a brief with a higher stamp on the cover, the room got smaller. Fewer people. Tighter doors. Different rules about what could leave the space. That gap between what I could see and what the next room could see was my first lesson in clearance tiers.

Now I get this question every week from transitioning service members. They are applying for cleared civilian jobs. The posting says "Tier 3 required" or "T5 eligible." They want to know what that means and which one they actually need.

This article is the decision piece. What each tier covers. What gets reviewed. What it costs. Which jobs trigger which tier. And how to figure out the one you need before you fill out an SF-86.

What is a Tier 3 background investigation?

A Tier 3 (T3) is the standard investigation for a Secret or Confidential clearance. It also covers non-critical sensitive positions. This is the most common clearance tier in the federal and contractor world.

The form you fill out is the Standard Form 86 (SF-86). Same form for Tier 3 and Tier 5. You submit it through NBIS eApp, which replaced the old e-QIP system in 2023.

The Tier 3 looks at your last 10 years. It pulls records. It checks your job history, where you lived, and the schools you went to. It runs your name through federal and state databases. It hits your credit report. It calls some of your references.

For most Tier 3 cases, the work is done by record check. Field interviews are limited. The price reflects that. DCSA publishes a per-case billing rate for a standard Tier 3 each fiscal year. That is what the agency pays per case. The current rate is on the DCSA Billing Rates page.

What jobs need a Tier 3?

Most cleared federal civilian jobs at the Secret level. Most Secret-cleared contractor jobs. Public trust positions in a lot of agencies. If a posting says "Secret clearance required" or "T3 eligible," you are in Tier 3 land.

If you held a Secret clearance on active duty, you went through a Tier 3. Or its predecessor, the NACLC. The Tier 3 framework has been the standard for Secret since the 2012 Federal Investigative Standards.

What is a Tier 5 background investigation?

A Tier 5 (T5) is the full-scope investigation for a Top Secret clearance. It also covers critical sensitive positions. It covers the access needed for Sensitive Compartmented Information (SCI), Special Access Programs (SAP), and TS-with-poly roles.

Same SF-86 form. Same NBIS eApp submission. But the depth is a different sport.

The Tier 5 still looks at your last 10 years. But it does not stop at record checks. An investigator pulls your file and runs field work. They drive to where you lived. They sit down with neighbors. They sit down with people you worked with. They sit down with the references you listed on the SF-86. Then they ask those references for the names of OTHER people who know you well. Those names get tracked down too.

They look at your money. Your foreign travel. Your foreign contacts. Time you lived overseas. Time a family member did. The deeper the access, the more they dig.

DCSA publishes a per-case billing rate for a Tier 5 each fiscal year. The rate is many times higher than a Tier 3. The cost reflects the field work and the time it takes.

What jobs need a Tier 5?

Top Secret cleared federal civilian jobs. TS contractor positions. Any role that needs SCI read-in. Most intel community jobs. A lot of cyber jobs at the Tier 4+ NIST level. SOF support roles. SAP work. Almost every "TS/SCI eligible" posting in the cleared contractor world.

If you held a Top Secret on active duty, you went through a Tier 5. Or its predecessor, the SSBI. If the job posting says "TS/SCI" or "Top Secret with poly," you are looking at Tier 5 plus a polygraph.

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Tier 3 vs Tier 5: side-by-side comparison

Here is the clean breakdown.

Both tiers go through the Defense Counterintelligence and Security Agency (DCSA). DCSA does the heavy lifting on personnel vetting for most of the federal government. Some agencies still run their own (CIA, FBI, State, parts of DHS). But the framework is the same.

Which jobs trigger which tier?

The clearance tier is set by the position, not by you. A job is "designated" at a sensitivity level. That sensitivity level drives the tier. The hiring agency or contractor figures this out long before they post the job.

A quick map.

If your old clearance was Secret, Tier 3 roles are the direct path on the civilian side. If your old clearance was Top Secret, doors open at both tiers. TS holders have more flexibility because the Tier 5 is the harder one to get.

What does the investigation actually review?

Both tiers cover the same buckets. The depth is what changes.

For Tier 3

• Identity: Birth records, citizenship, name changes.
• Residence history: The last 10 years of where you lived.
• Employment: The last 10 years of jobs, with supervisor names and reasons you left.
• Education: The last 10 years of schools, degrees, and any gaps.
• Criminal records: Federal and state checks. Some local court checks.
• Credit: A pull of your credit report. Big debts, collections, and tax liens get attention.
• References: A small number of named references get contacted.
• Drug use: What you disclosed on the SF-86. Any test that flagged.

For Tier 5 (everything in Tier 3, plus)

• In-person subject interview: An investigator sits down with you. They run through the SF-86. They ask follow-up questions on anything that needs clarifying.
• Neighbor interviews: They knock on doors at your old addresses. They want to know if you were home at weird hours, who came to visit, whether you ever did anything that made the neighborhood notice.
• Coworker interviews: They sit down with people you worked with. Bosses, peers, sometimes subordinates.
• Reference interviews in-person: Not just a phone call. They sit down with the names you wrote in Section 16 of the SF-86. They get more names from those people.
• Foreign contact deep dive: Every foreign person in your life gets reviewed. Nationality, how you met them, what you talk about, whether they have ever asked about your work.
• Foreign travel deep dive: Every country you visited in the last 10 years. Why. Who you were with. Whether you reported it through your security office.
• Financial deep dive: Bigger debt picture. Gambling. Sudden large purchases. Any pattern that could make you exploitable.

If you want a deeper look at how to prep for the SF-86 itself, we wrote that piece here: how to prep for the e-QIP / NBIS background investigation. And for picking your references, this one: how to pick the right people for SF-86 Section 16.

How long does each tier take?

Timelines have improved a lot since the 2018 backlog. DCSA has cut its case inventory by roughly 24% in the past year. But TS still takes longer than Secret.

For a clean Tier 3 in 2026, the case usually moves from start to finish in about 4 to 5 months. About 18 days to initiate. Around 73 days for the investigation itself. Another 47 days for the adjudication.

For a clean Tier 5 in 2026, plan for 4 to 8 months. Complex cases (lots of foreign travel, dual citizenship, big financial history) can stretch past a year.

If your case is messy, both tiers take longer. The bigger the file the investigator has to chase, the longer it sits.

We covered timelines in more detail here: clearance investigation timeline: how long it actually takes.

What does each tier cost, and who pays?

You do not pay for the investigation. The hiring agency or the contractor company pays DCSA for it. For each fiscal year, DCSA publishes the per-case rates for both tiers. The Tier 5 rate is much higher than the Tier 3 rate.

Where this matters to you is the math the employer is running. A contractor weighing whether to put you up for a Tier 5 is looking at a real bill. They want to make sure you are going to clear before they spend that money. If you have known issues like foreign contacts, big debt, or past drug use, they may want to talk first. Better to flag it before they file paperwork.

We broke this down further here: Top Secret clearance cost breakdown and clearance cost: employer vs employee.

What is Trusted Workforce 2.0 and Continuous Vetting?

This is the part that changed in the last few years. The old rule was simple. Tier 3 every 10 years. Tier 5 every 5 years. That was the periodic reinvestigation cycle.

That model is gone. Under Trusted Workforce 2.0, DCSA runs Continuous Vetting (CV) on the entire cleared population. Over 3.8 million cleared people are enrolled in CV right now.

CV means your record gets checked all the time, not every 5 or 10 years. DCSA pulls automated record checks on a regular schedule. Arrests. Credit hits. Bankruptcy filings. Travel patterns. If something flags, it gets reviewed right then.

The 5-year and 10-year reinvestigation calendar most veterans grew up with is no longer the standard. DoD finished moving its cleared workforce off periodic reinvestigation by 2021. The rest of the federal government is following.

What this means for you: once you clear a Tier 3 or Tier 5, you do not "renew" it on a calendar anymore. You stay in the CV pool. The system watches in real time. If you separate and the clearance goes inactive, the rules change. We covered that here: clearance renewal after separation.

Which tier do you actually need?

You do not pick. The job picks. But you can be smart about which jobs you apply for based on what tier you can support.

Run through this short decision path before you apply.

To check your status before you apply, this is the walkthrough: how to check your security clearance status after the military. And if you are moving between agencies or from federal to contractor, reciprocity rules apply: how clearance reciprocity works between agencies.

What about pay differences?

Tier 5 clearances command a real premium on the contractor side. The TS/SCI labor market is smaller. The people are harder to replace. The investigations cost more to run. That pushes pay up.

Tier 3 (Secret) work pays a smaller but real bump over uncleared work. The gap between Secret and TS is one of the cleanest ways to map your career growth in the cleared world.

We covered the salary math in two places: is a Top Secret clearance worth the salary premium and how much each clearance level is actually worth.

What to do while you wait

If a job is in motion and the investigation is running, do not just sit. Most of the wait is out of your hands. But a few things are inside your hands.

• Keep your SF-86 file current. If you take a new trip, change jobs, or pick up a new foreign contact, write it down. You will get asked about it.
• Watch your credit. Pay things on time. Settle anything in collections. Credit problems are one of the top reasons cases get held up.
• Tell your references they are listed. An investigator showing up at someone's door unannounced is a bad look. A quick text to your references lets them prep.
• Get your resume ready for the role. The clearance is the gate. The resume is the offer. While the investigation runs, work on the resume that is going to land you the offer.

If you need to translate your military experience into the cleared civilian world, BMR's resume builder is built exactly for that. Free for veterans and military spouses. You paste the job posting, and the tool tailors a clean civilian resume around your service record. No fluff. No corporate jargon. Just the language hiring managers actually scan for.

How this fits into your transition

The clearance is one piece of the picture. The cleared job board is another. The resume is a third. The interview is a fourth. None of them work alone.

If you are still trying to figure out where to apply, start with the cleared job boards. They are not the same as the open job boards. We mapped the best ones for veterans here: best cleared job boards for veterans in 2026.

If you are putting your clearance on your resume, the phrasing matters. Some things are fine to say. Some things are not. We covered both here: how to list security clearance on a resume and what clearance details you can legally disclose.

And if you are negotiating an offer in the cleared space, this one is worth a read before the call: salary negotiation for TS/SCI premium pay.

The cleared market is one of the best places for veterans to land. The investment you already made in earning a clearance on active duty is sitting there waiting to be used. Pick the tier you fit. Apply to the jobs that match. And keep moving.