Which Per Diem Rate Applies When Your TDY House Is Outside the Duty Location?

Planners and travelers often select a house that sits outside the immediate boundaries of the official TDY duty location. The property may offer better parking, a full kitchen, lower noise, or simply more availability than options closer to the installation. The practical question that follows is which per diem rate controls the lodging reimbursement. Is it the rate for the city or county where the house is located, or the rate for the place where the mission is actually performed?

Under the Joint Travel Regulations the answer is consistent. The applicable per diem rate is determined by the official TDY duty location, not by the address of the lodging. A house booked as non-conventional lodging remains reimbursable up to the lodging portion of the per diem established for the duty site, provided the other JTR conditions are met. The physical location of the property does not automatically shift the traveler into a different locality rate.

How the Duty Location Sets the Rate

Per diem locality is tied to where the traveler is authorized to perform duty. Orders designate the TDY location. That designation, not the lodging address, establishes the maximum lodging and meals-and-incidental-expenses rates. If the orders send a team to Nellis Air Force Base, the Nellis locality rate applies even when the house is in a neighboring community twenty or thirty minutes away. The same rule holds for any other installation or training site.

This approach exists for a practical reason. Travelers and units routinely use lodging outside the exact city limits of the duty station. Hotels in adjacent towns have long been accepted when they fall within a reasonable commuting distance and the cost does not exceed the duty-location cap. Non-conventional lodging follows the identical standard. The house is simply another form of off-base lodging. Its reimbursement ceiling remains the lodging per diem for the official TDY site.

Finance offices review the orders and the claimed amount against that duty-location rate. They do not recalculate the cap based on the street address of the property. As long as the invoice shows a nightly rate at or below the authorized lodging per diem and the dates match the orders, the claim processes normally.

When Distance and Commuting Become Relevant

The duty-location rule does not eliminate every practical consideration. A house that requires an excessive daily commute can still be questioned if it interferes with the mission or creates additional costs the unit did not anticipate. The JTR does not set a strict mileage cutoff, but approving officials expect lodging choices to support, rather than hinder, the work. A forty-five-minute drive each way may be acceptable when closer options are unavailable or unsuitable. A ninety-minute drive is more likely to draw scrutiny.

Units that document the reason for the selection reduce the chance of later questions. A short note in the trip file or attached to the voucher can state that the property was chosen for mission requirements such as secure parking for equipment, a private planning space, or the absence of suitable lodging inside the primary locality. When the nightly rate remains inside the duty-location per diem, that explanation is usually sufficient.

Travelers should also confirm that no separate transportation entitlement is being created solely because of the lodging choice. Daily commuting between an off-base house and the duty site is normally the traveler’s responsibility unless the orders specifically authorize otherwise. The lodging decision and the transportation decision remain distinct.

Documenting the Choice in DTS

The voucher itself does not require a special code because the house is outside the locality. The traveler claims the actual lodging cost up to the duty-location maximum. The uploaded invoice shows the property address, the nightly rate, and the dates. The orders show the official TDY location. Those two documents together establish that the correct per diem cap was applied.

If the house rate is lower than the duty-location lodging per diem, the traveler is reimbursed the actual amount. If the rate equals the cap, reimbursement is at the cap. If the rate exceeds the cap on any night, the traveler is responsible for the difference on those nights, exactly as would occur with a hotel. No additional calculation based on the house’s own city or county is required.

Planners can strengthen the file by retaining the original course-of-action comparison. When the selected house was one of several options presented, and the others were either unavailable or less suitable for the mission, that record supports the decision if questions arise. The comparison does not need to be uploaded to DTS, but it should exist in the unit’s travel documentation.

Common Misunderstandings

A frequent error is assuming the per diem locality automatically changes to the city where the house is located. That assumption leads travelers to look up the wrong rate and either under-claim or over-claim. The controlling rate remains the one tied to the orders.

Another misunderstanding is that a house outside the locality is automatically non-compliant. Compliance depends on authorization, cost relative to the duty-location per diem, and proper documentation, not on whether the property sits inside a particular city limit. Off-base lodging has always been permitted under those conditions.

A third issue appears when seasonal or special per diem rates apply to the duty location. The house is still measured against whatever rate is in effect for the official site on the dates of the TDY. The property’s own local rate schedule is irrelevant to the reimbursement cap.

Practical Planning Steps

Identify the official duty location first and confirm the lodging per diem for those dates. Any house option should be evaluated against that number before it is presented as a course of action. Note the approximate drive time and any mission-specific reasons the property was selected. Include those details in the trip request so the documentation trail begins early.

Request an invoice that clearly states the property address, the nightly rate, and the dates of occupancy. When the voucher is prepared, claim only the official nights at the actual cost or the duty-location cap, whichever is lower. Attach the orders and the invoice. If the commute is longer than typical for the area, a brief explanatory note can be included in the voucher remarks or retained in the travel file.

These steps keep the process identical to any other off-base lodging claim. The fact that the lodging is a house rather than a hotel does not alter the locality rule or the documentation standard.

Frequently Asked Questions

Does the per diem rate change if the house is in a different city?


No. The rate is set by the official TDY duty location on the orders, not by the address of the lodging.

Can we still be reimbursed if the house is twenty or thirty minutes from base?


Yes, provided the nightly rate does not exceed the lodging portion of the duty-location per diem and the arrangement supports the mission.

What if the house is in a locality with a higher per diem rate?


The higher rate does not apply. Reimbursement remains capped at the duty-location rate.

Do we need special approval because the property is outside the locality?


Not solely because of location. Standard approval for non-conventional lodging and a rate within the authorized cap are the normal requirements.

How do we show the correct rate was used?


The orders establish the duty location. The invoice shows the actual cost. The claimed amount must not exceed the lodging per diem for that duty location.

Applying the Correct Rate

The per diem locality rule is straightforward once the controlling factor is identified. The official TDY duty location sets the rate. A house located outside that immediate area remains a valid non-conventional lodging option when its cost stays within the authorized cap and the choice supports the work. Documentation in DTS follows the same pattern used for any other off-base stay.

Units that select houses for privacy, kitchens, parking, or team space can do so without triggering a different per diem calculation. The mission location remains the reference point. The lodging simply needs to fit inside the rate that location already authorizes.

If you are evaluating house options that sit outside the primary duty locality, include the official TDY location and the approximate distances in the trip request at www.9lineagency.com. Courses of action can be built and priced against the correct per diem from the start, so the final documentation already aligns with the rate finance will apply. The house can still deliver the mission advantages. The reimbursement path stays the one the orders already define.