An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock
( )
or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
We are the largest governmentwide, multi-agency contract program that provides professional services via six indefinite delivery, indefinite quantity, or IDIQ, contracts.
Learn more about OASIS+.
OASIS+ Enters Phase II, Re-opening Solicitations (Continuously) on or about January 12, 2026 with Thirteen Domains
The U.S. General Services Administration (GSA) is expanding the service offerings of the OASIS+ Best-in-Class (BIC) contract program. On or about January 12, 2026, all six OASIS+ solicitations will re-open for proposal submissions to launch Phase II of the program.
This re-opening will introduce five new service domains, increasing the total number of domains to thirteen combined. This expansion provides federal agencies with a broader range of comprehensive professional service solutions and creates new opportunities for qualified industry partners. The program will publish a pre-amendment notice on SAM.gov, tentatively on December 16, 2025, to release the DRAFT scorecards for all domains before the reopening date.
Based on extensive market research and stakeholder feedback, the following domains will be open:
Continuous Opening: The solicitations will be open continuously for proposal submissions, consistent with the program’s initial strategy.
OASIS+ has six separate and distinct IDIQ contracts. The size and type of your business determines what contract you are eligible for.
Domains are functionally aligned groupings of related non-IT services. Each domain includes multiple, related North American Industry Classification System, or NAICS codes. Domains and NAICS codes help determine the scope of a contract.
Management & Advisory
Intelligence Services
Facilities
Research & Development
Technical & Engineering
Environmental
Logistics
Enterprise Solutions
Learn more about domains and labor categories
Get the latest news and updates from the OASIS+ Interact community.
Explore OASIS+ Interact Community
We’re here to answer your questions: Contact us
Error, The Per Diem API is not responding. Please try again later.
No results could be found for the location you've entered.
Rates for Alaska, Hawaii, and U.S. territories and possessions are set by the Department of Defense.
Rates for foreign countries are set by the Department of State.
Rates are available between 10/1/2023 and 09/30/2026.
The End Date of your trip can not occur before the Start Date.
Traveler reimbursement is based on the location of the work activities and not the accommodations, unless lodging is not available at the work activity, then the agency may authorize the rate where lodging is obtained.
Unless otherwise specified, the per diem locality is defined as "all locations within, or entirely surrounded by, the corporate limits of the key city, including independent entities located within those boundaries."
Per diem localities with county definitions shall include"all locations within, or entirely surrounded by, the corporate limits of the key city as well as the boundaries of the listed counties, including independent entities located within the boundaries of the key city and the listed counties (unless otherwise listed separately)."
When a military installation or Government - related facility(whether or not specifically named) is located partially within more than one city or county boundary, the applicable per diem rate for the entire installation or facility is the higher of the rates which apply to the cities and / or counties, even though part(s) of such activities may be located outside the defined per diem locality.
U.S. General Services Administration