How Long Do Security Clearances Last by Level?

Security clearances have three traditional durations by level: Confidential lasts 15 years, Secret lasts 10 years, and Top Secret lasts 5 years before a reinvestigation was historically required. Those are still the baseline numbers, but for the national security workforce they no longer work the way they used to. Under the Trusted Workforce 2.0 initiative, continuous vetting has replaced periodic reinvestigations, so your eligibility is now monitored through ongoing automated checks rather than a single deep-dive every few years.¹

The Baseline Timelines by Clearance Level

For decades the government required a fresh background investigation at fixed intervals depending on the level of access:

Confidential: reinvestigation every 15 years
Secret: reinvestigation every 10 years
Top Secret: reinvestigation every 5 years

The clock ran from the date of the previous investigation, not the date access was granted.² Someone last investigated in 2020 at the Top Secret level would have been due for reinvestigation by 2025 under this model. The weakness was obvious: a lot can change in five years, and even more in fifteen.

These numbers still matter. They form the baseline for reciprocity decisions between agencies, and they still govern personnel who have not yet been enrolled in continuous vetting. If you hold a clearance and someone asks how long it lasts on paper, the 5/10/15 framework is the starting answer.

How Continuous Vetting Changed the Renewal Cycle

The Trusted Workforce 2.0 initiative replaced periodic reinvestigations with continuous vetting across all national security positions. Instead of waiting years between checks, the government enrolls cleared personnel in automated monitoring systems that flag security-relevant events as they happen. The national security workforce completed enrollment by the end of 2022, and enrollment in continuous vetting formally satisfies the old periodic reinvestigation requirements.¹

In practice, roughly four million clearance holders are now subject to ongoing automated record checks rather than a single reinvestigation every five or ten years. Monitoring covers criminal records, financial data, foreign travel, and other indicators an agency might want to examine more closely. When something surfaces, it triggers a review right then rather than waiting for the next scheduled cycle.

The program is still expanding. Enrollment for non-sensitive public trust positions began in 2024 and is expected to cover about another million federal workers.¹ The underlying policy framework is Security Executive Agent Directive 6, which authorizes continuous evaluation of individuals with access to classified information.³

The bottom line for duration: if you hold an active clearance for a national security position and you are enrolled in continuous vetting, you are not counting down to a five- or ten-year expiration date. Your clearance stays valid as long as CV keeps confirming your eligibility and you remain in a position that requires access.

When the Old Timelines Still Bite: Reciprocity

Federal policy requires agencies to accept each other’s clearance determinations without redoing the investigation. An active Secret clearance from the Department of Defense is supposed to transfer to a Department of Energy position at the same level without a new background check or a new questionnaire.⁴

Reciprocity has exceptions, and one of them ties directly to the age of your investigation. An agency can decline to accept a prior clearance if:

New adverse information has surfaced since the last investigation
The investigation is more than seven years old (acceptance becomes discretionary, not required)
The clearance was granted with an exception under the adjudicative guidelines
A Bond Amendment disqualifier applies and the new position requires access to sensitive compartmented information, special access programs, or restricted data
The clearance was interim, limited, or one-time
The clearance is currently denied, revoked, or suspended

So even under continuous vetting, the underlying investigation’s age can matter when a new agency takes over sponsorship. The seven-year mark is the practical cutoff where you may find yourself needing a fresh look, regardless of what level of clearance you hold.⁴

What Happens if You Leave Cleared Work

A clearance stays active only while you have a sponsoring employer and a position that requires access to classified information. Leaving cleared work does not cause your clearance to expire on the spot, but it goes inactive. The threshold that matters is 24 months: a continuous break in federal service of two years or more means you will need a completely new background investigation to regain access.⁵

Return to a cleared position within that window and your underlying investigation is still current? Your clearance can be reinstated without starting over. Continuous vetting adds a layer of protection here, because CV enrollment satisfies reinvestigation requirements and generally puts a returning holder in a straightforward position for reinstatement.

The 24-month clock runs from your last day of active sponsorship, not from when you left a specific employer. Moving directly from one cleared contractor to another does not trigger a break at all.

What Can End Your Clearance Before Any Deadline

Duration only tells you when the government would have looked again on its own schedule. A clearance can end well before that if you stop meeting the standards, and continuous vetting means the government does not need to wait for the calendar to catch a problem.

Your Ongoing Reporting Duties

Security Executive Agent Directive 3 requires cleared personnel to report a range of events to their security office. Foreign travel is among the most common triggers. You must submit an itinerary and receive approval before any unofficial foreign travel. Unplanned day trips to Canada or Mexico must be reported within five business days of return, and any deviation from an approved travel plan follows the same five-day window.⁶

Other reportable events include significant changes to your financial situation, contact with foreign nationals that could raise security concerns, arrests or criminal charges, and personal-status changes like marriage to a foreign national. Both Secret and Top Secret holders must report financial matters and foreign travel, with specific requirements varying slightly by level.⁷ Failing to report is itself grounds for revocation.

The 13 Adjudicative Guidelines

When the government evaluates whether to grant, continue, or revoke a clearance, it applies the 13 adjudicative guidelines in Security Executive Agent Directive 4. They cover allegiance to the United States, foreign influence, foreign preference, sexual behavior, personal conduct, financial considerations, alcohol consumption, drug involvement, psychological conditions, criminal conduct, handling of protected information, outside activities, and use of information technology systems.⁸

Financial problems and foreign influence generate the most clearance trouble in practice. Heavy debt, bankruptcy, unexplained wealth, or gambling issues raise concerns under Guideline F. Close relationships with foreign nationals, particularly those connected to a foreign government, trigger scrutiny under Guideline B. The evaluation applies a whole-person approach, weighing all available information rather than applying rigid pass/fail thresholds.⁸

So the honest answer to how long a clearance lasts is layered. On paper: 15 years at Confidential, 10 at Secret, 5 at Top Secret. In current practice: as long as continuous vetting keeps confirming your eligibility, you keep a sponsor, and you keep meeting the reporting and conduct standards that go with the access.

1
Performance.gov. Trusted Workforce 2.0 Transition Report
2
U.S. Department of State. Security Clearances FAQ Updates
3
Office of the Director of National Intelligence. SEAD 6 Continuous Evaluation
4
Director of National Intelligence. Security Executive Agent Directive 7 – Reciprocity of Background Investigations and National Security Adjudications
5
Army. Security Clearances Frequently Asked Questions – Army G-2
6
Director of National Intelligence. Security Executive Agent Directive 3 – Reporting Requirements for Personnel with Access to Classified Information or Who Hold a Sensitive Position
7
Defense Counterintelligence and Security Agency. SEAD 3 Industry Reporting Desktop Aid
8
Director of National Intelligence. SEAD 4 Adjudicative Guidelines