A detailee is a federal employee on a temporary assignment to a different position, office, or organization while remaining in their permanent position of record. If you are asking what a detailee is, the short version is this: the work changes, the paycheck source and official job do not. You keep your grade, step, benefits, and home-agency payroll status for the duration of the assignment, and when the detail ends you return to the job you never technically left.
That distinction is why details exist as a separate personnel tool from transfers, reassignments, and promotions. Those actions change your position of record. A detail does not. The gaining organization gets the use of your skills; your home (or “losing”) agency retains administrative responsibility for your salary, benefits, retirement contributions, leave accrual, and personnel actions. The practical consequence is that the gaining organization has no authority over your grade or pay and cannot unilaterally extend or shorten the assignment without coordination with your home agency.
The Three Kinds of Details
Where you are being sent determines which legal authority governs the assignment and what paperwork has to happen first.
Intra-Agency Details
You stay within your own department or agency but move to a different office, bureau, or division. The department head has broad statutory authority to move employees among bureaus and offices, as long as the employee is not required by law to work exclusively on a specific function.1Office of the Law Revision Counsel. 5 U.S. Code 3341 – Details; Within Executive or Military Departments Only one agency’s leadership needs to sign off, which makes this the simplest kind to arrange.
Inter-Agency Details
You move from one federal agency to another. The same statute authorizes the assignment, but money has to move too. The gaining agency typically reimburses the losing agency for your salary and benefits through an interagency agreement authorized under the Economy Act.2Office of the Law Revision Counsel. 31 U.S. Code 1535 – Agency Agreements That agreement spells out cost breakdown, payment schedule, and scope of work before you show up.
IPA Assignments
Intergovernmental Personnel Act assignments send federal employees to non-federal organizations, or bring non-federal personnel into the government. Eligible partners include state and local governments, tribal governments, universities, federally funded research and development centers, and qualifying nonprofits.3U.S. Office of Personnel Management. Intergovernmental Personnel Act Mobility Program IPA assignments carry heavier rules than standard details, and those get their own section below.
How Long a Detail Can Last
The baseline limit within an executive or military department is 120 days. Each detail must be authorized by a written order from the department head. Renewals are allowed in 120-day increments, again by written order, with no statutory cap on the number of renewals.1Office of the Law Revision Counsel. 5 U.S. Code 3341 – Details; Within Executive or Military Departments Agencies often set their own internal ceilings on how long a detail can run before leadership starts asking whether the position should be filled permanently.
IPA assignments run on a different clock. An initial assignment can last up to two years. The agency head may extend it for up to two additional years if both parties agree.4Office of the Law Revision Counsel. 5 U.S. Code 3372 – General Provisions There are career-level guardrails on top of that. A federal employee cannot spend more than six total years on IPA assignments during a career, and cannot serve more than four continuous years without returning to the home organization for at least 12 months.5eCFR. 5 CFR Part 334 – Temporary Assignments Under the Intergovernmental Personnel Act
Most details are arranged collaboratively, with the employee expressing interest and the losing supervisor agreeing to release them. Nothing in the statute requires your consent, though. The department head’s authority to detail employees among bureaus and offices is a management right, and agencies can direct an involuntary detail when operational needs demand it. Employees covered by a collective bargaining agreement may have negotiated protections around involuntary details, so check your contract if this comes up.
The 120-Day Rule Every Detailee Should Know
This is where detailees and their supervisors most often run into trouble. If you’re detailed to a position at a higher grade or one with greater promotion potential, the agency must use competitive merit promotion procedures once the detail exceeds 120 days.6eCFR. 5 CFR 335.103 – Agency Promotion Programs That 120-day count is not reset by breaks between details. Any noncompetitive time spent in higher-graded positions during the preceding 12 months counts toward the total.
When an agency skips competitive procedures and the detail to a higher-graded position runs past 120 days, the employee may seek a retroactive temporary promotion covering the entire period. It is not automatic. It requires a finding by an appropriate authority, such as an arbitrator, the Merit Systems Protection Board, or the Equal Employment Opportunity Commission, that the agency violated law, regulation, or a collective bargaining agreement.7Office of Personnel Management. Questions and Answers on 5 CFR 335.103 Time Limited Promotions If granted, the retroactive promotion comes with back pay at the higher grade for the qualifying period.
The practical takeaway: if you’re performing higher-graded work and approaching day 120, raise the issue with your supervisor. Agencies that let this deadline slip create liability for themselves and uncertainty for you.
Pay, Locality Rate, and Step Increases
Your home agency pays your salary throughout the detail. Grade, step, health insurance, life insurance, retirement contributions, and leave accrual all continue as if you were sitting at your regular desk.
A frequent question: what happens to locality pay when a detail sends you to a different geographic area? Nothing changes. A temporary detail does not alter your official worksite for pay purposes, so you keep the locality rate associated with your permanent duty station.8U.S. Office of Personnel Management. Fact Sheet: Official Worksite for Location-Based Pay Purposes A Washington, D.C. detailee sent to a field office in rural Kansas still receives the D.C. locality rate. The reverse is also true, which means a detail to a higher-cost city will not bump your pay.
Time on detail counts as creditable federal service for within-grade step increase waiting periods. If the gaining organization does not prepare a performance rating for the detail period, the acceptable-level-of-competence determination that normally gates a step increase is waived, and the increase is granted.9eCFR. 5 CFR Part 531 Subpart D – Within-Grade Increases A detail will not cost you a step increase even if the gaining organization drops the ball on a performance write-up.
Your home agency still owns your annual performance appraisal, with the gaining organization providing input on the detail period. How that input is captured depends on your agency’s own performance appraisal system.
Travel and Per Diem
When a detail requires you to work at a location away from your permanent duty station, you may be eligible for travel reimbursement and per diem. Per diem covers lodging, meals, and incidental expenses at rates set by the General Services Administration for travel within the continental United States.10U.S. General Services Administration. Frequently Asked Questions, Per Diem If lodging in the area exceeds the standard rate, agencies can reimburse actual hotel costs up to 300 percent of the established per diem.
Whether these costs are paid by the losing or gaining agency depends on the interagency agreement. For reimbursable details, the gaining agency usually covers travel. For non-reimbursable details, the losing agency foots the bill. Get the travel authorization in writing before you leave. Agencies sometimes approve a detail enthusiastically and then discover nobody budgeted for the per diem.
If You Are an IPA Detailee
IPA assignments carry obligations that standard details do not, because they cross the boundary between federal and non-federal employment.
Obligated Service
A federal employee who accepts an IPA assignment must agree to return to federal service for a period equal to the length of the assignment. Complete a two-year IPA and then resign, and you are required to reimburse the federal agency for its share of assignment costs (not including salary and benefits). The agency head can waive this reimbursement for good cause.5eCFR. 5 CFR Part 334 – Temporary Assignments Under the Intergovernmental Personnel Act
Ethics and Conflicts of Interest
IPA assignees, whether coming in or going out, are subject to the same conflict-of-interest laws as regular federal employees. The financial conflict-of-interest statute prohibits participation in any matter where you, your spouse, minor child, or an organization you’re affiliated with has a financial interest. Incoming IPA assignees must file a financial disclosure report before the assignment agreement is approved, during each year of the assignment, and before any extension is approved.11Department of Energy. Summary Standards of Conduct Provisions and Conflict-of-Interest Laws for IPA Assignees
Post-employment restrictions also apply. Once you have participated personally and substantially in a particular matter as a government employee, you face a lifetime bar on representing anyone else to the government on that same matter. This catches some IPA assignees off guard, particularly those from universities or nonprofits who expect to return to advocacy roles.
Security Clearance Reciprocity
If the gaining agency requires a security clearance, federal policy generally calls for reciprocal recognition of an existing clearance. An agency should not require you to undergo a new investigation simply because you’re moving to a different organization. Reciprocity has exceptions, though. A new or additional investigation may be required if your existing clearance was granted on an interim basis, if the underlying investigation is older than the applicable reinvestigation period (seven years for Top Secret, ten for Secret, fifteen for Confidential), or if the new position requires a polygraph or Special Access Program eligibility you don’t already hold.12Office of the Director of National Intelligence. Reciprocity Examples
Clearance processing can take months. If your detail involves a higher clearance level or a new polygraph, start the conversation early. A detail offer that assumes clearance reciprocity can fall apart if the gaining agency’s security office disagrees.
When the Detail Ends
Because a detail never changes your position of record, there is no formal “return” the way there would be after a transfer. You resume work in your permanent position. Grade, step, and benefits continue uninterrupted. If your home office reorganized or your specific role was restructured while you were away, the losing agency is responsible for placing you in a position of equivalent grade and pay.
Any extension or early termination should be documented in writing. Letting a detail quietly lapse or informally extend past its authorized end date creates administrative headaches, particularly if the 120-day competitive threshold for higher-graded work is in play. Clean documentation protects both you and the agencies involved.