2025 Main Bus Program

2026 FALL OPEN SEASON

Update September 15, 2026

In support of the Main Bus Program, the General Services Administration (GSA) is issuing the following update regarding the 2026 Fall Open Season.

Amendment 005 to Solicitation No. 47QMCA24R0006 has been issued. The following documents are incorporated into the solicitation through this amendment:

• 005_47QMCA24R0006_SF30_2026-09-15
• 005_47QMCA24R0006_Solicitation_2026-09-15
• 005_47QMCA24R0006_SolicitationEnhancementDocument_2026-09-15
• 005_47QMCA24R0006_Attachment_19_EnhancedVehicleOrderStatusReporting_2026-09-15
• 005_47QMCA24R0006_Attachment_20_EnhancedVehicleOrderStatusReportingTemplate_2026-09-15

Offerors are responsible for reviewing Amendment 0005 and all incorporated documents in their entirety. All other solicitation terms and conditions remain unchanged unless expressly modified by the amendment.

Update July 22, 2026

In support of the Main Bus Program, GSA is providing the following updates for the 2026 Fall Open Season:

The following attachment is hereby incorporated into this posting:

• MainBus_OpenSeasonConferenceFY26Fall_2026-07-22.pdf

Vendors and potential offerors wishing to view the conference recording must first obtain a GSA Affiliated Customer Account (GACA) to gain access. Instructions for obtaining a GACA are attached to this notice. Once approved, offerors may access the recording at the following link: https://drive.google.com/file/d/1EFgMXYbP8wJ-YLYkDUjkEVuvG-sxBEpW/view?usp=sharing (If the link does not open directly, copy and paste the address into your web browser).

July 14, 2026

In support of the 2025 Main Bus Program, GSA is announcing the FY26 Fall Open Season period for existing contractors to submit New Model Year (NMY) updates to awarded line items and for prospective offerors to provide proposals.  

Important Dates:

• Comment Collector opened in GSAFleet.gov: June 2, 2026
• Bid Intention Period opened in GSAFleet.gov: June 2, 2026
• Comment Collector closes in GSAFleet.gov: June 30, 2026
• Bid Intention Period closes in GSAFleet.gov: June 30, 2026
• Fall Open Season Industry Day: July 22, 2026
• Bid Period opening in GSAFleet.gov: August 3, 2026
• Bid Period closing in GSAFleet.gov: August 21, 2026, at 12:00 PM Eastern Time
• Supplemental Documents due (if applicable): August 21, 2026, at 12:00 PM Eastern Time

GSA will hold a virtual Industry Day as stated above to discuss the Open Season process. All interested parties should attend. The Google Meet joining information is as follows:

2026 Fall Open Season Industry Day
Wednesday, July 22 · 10:00 – 11:00 AM Eastern Time
Google Meet joining information:
Video call link: https://meet.google.com/ukp-fpqh-ojx
Or dial: ‪(US) +1 442-666-1370 PIN: ‪611 355 047#
More phone numbers: https://tel.meet/ukp-fpqh-ojx?pin=9965853018233

The Government intends to make awards based on initial offers. Offerors are therefore encouraged to submit their best pricing and terms with their initial proposal.

Should you have any questions regarding the Fall Open Season, please contact the Main Bus Program Contracting Team.

New offerors are strongly encouraged to set up a one-on-one session with the Main Bus Program Contracting Team to discuss the solicitation requirements. 

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2026 SPRING OPEN SEASON

Update March 5, 2026

In support of the Main Bus Program, GSA is providing the following updates for the 2026 Spring Open Season:

1) Important Dates:

• Bid Period Open: March 5, 2026
• Bid Period Close: March 20, 2026 at 12:00 PM Eastern Time
• Supplemental Documents Due (if applicable): March 20, 2026 at 12:00 PM Eastern Time

2) The following attachments are hereby incorporated:

• MainBus_OpenSeasonConferenceFY26Spring_2026-03-04.pdf

Update February 9, 2026

In support of the Main Bus Program, GSA is announcing the FY26 Spring Open Season for existing contractors to submit new model year (NMY) updates to awarded line items and for current contractors or prospective offerors to propose new models for consideration under the program. GSA will host a virtual Industry Day to provide an overview of the Spring Open Season process.

Important Dates:

• Spring Open Season Industry Day: March 4, 2026 1:00 PM Eastern Time
• Bid Period Open: March 5, 2026
• Bid Period Close: March 20, 2026 at 12:00 PM Eastern Time
• Supplemental Documents Due (if applicable): March 31, 2026 at 12:00 PM Eastern Time

GSA will hold a virtual Industry Day as stated above to discuss the Open Season process. All interested parties should attend. The Google Meet joining information is as follows:

2026 Spring Main Bus Open Season Conference
Wednesday, March 4 · 1:00 – 2:00 PM Eastern Time America/New York
Google Meet joining info:
Video call link: https://meet.google.com/ezb-tkii-ymi
Or dial: ‪(US) +1 402-862-6277‬ PIN: ‪866 095 755‬#
More phone numbers: https://tel.meet/ezb-tkii-ymi?pin=2377596655151

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2025 FALL OPEN SEASON

Update September 18, 2025

In support of the Main Bus Program, GSA is providing the following update for the FY25 Fall Open Season period.

1) The following attachments are hereby incorporated:

• JointProgram_OpenSeasonConferenceFY25Fall_2025-09-17

2) Important Dates are as follows:

• Comment Collector Opening in GSAFleet.gov: June 2, 2025
• Bid Intention Period Opening in GSAFleet.gov: June 2, 2025
• Comment Collector Closing in GSAFleet.gov:  June 30, 2025
• Bid Intention Period Closing in GSAFleet.gov: June 30, 2025
• Fall Open Season Industry Day: September 17, 2025 at 9:00 AM Eastern Time
• Bid Opening in GSAFleet.gov: September 22, 2025
• Bid Closing in GSAFleet.gov: October 29, 2025 at 12:00 PM Eastern Time
• Supplemental Documents Due (if applicable): October 29, 2025 at 12:00 PM Eastern Time

Should vendors or potential offerors wish to view the recording of the conference, please request a GSA Affiliated Customer Account (GACA) to gain access. Instructions for obtaining a GACA are attached to this notice. Once approved, offerors may access the recording at the following link: https://drive.google.com/file/d/11GqYibw76yhxqYfeaCyeiB5f_3dMxW8a/view?usp=drive_link (cut and paste the address into your browser).

Please note that both the Bid Intention Period and the Comment Collector periods are now closed. No new makes and models will be accepted.

Update July 23, 2025

In support of the Main Bus Program, GSA is providing the following update for the FY25 Fall Open Season period.

Please note that both the Bid Intention Period and the Comment Collector periods are now closed. No new new makes and models will be accepted.

Important Dates:

• Comment Collector Opening in GSAFleet.gov: June 2, 2025
• Bid Intention Period Opening in GSAFleet.gov: June 2, 2025
• Comment Collector Closing in GSAFleet.gov:  June 30, 2025
• Bid Intention Period Closing in GSAFleet.gov: June 30, 2025
• Fall Open Season Industry Day: September 17, 2025 at 9:00 AM Eastern Time
• Bid Opening in GSAFleet.gov: September 22, 2025
• Bid Closing in GSAFleet.gov: October 29, 2025 at 12:00 PM Eastern Time
• Supplemental Documents Due (if applicable): October 29, 2025 at 12:00 PM Eastern Time

GSA will hold a virtual Industry Day as stated above to discuss the Open Season process. All interested parties should attend. The Google Meet joining information is as follows:

FY25 Fall Open Season Conference | OCONUS, Main Bus, Transit Bus
Wednesday, September 17 · 9:00 – 10:30am Eastern Time

Google Meet joining info:
Video call link: https://meet.google.com/paf-deya-kad
Or dial: ‪(US) +1 267-553-4614‬ PIN: ‪600 661 238‬#
More phone numbers: https://tel.meet/paf-deya-kad?pin=3859887371943

Should you have any questions, please contact your contracting team.

May 27, 2025

In support of the Main Bus Program, GSA is announcing the FY25 Fall Open Season period for existing contractors to submit new model year (NMY) updates to awarded line items and for current contractors or prospective offerors to propose new models for consideration under the program. GSA will host a virtual Industry Day to provide an overview of the Fall Open Season process.

The purpose of this message is to call your attention to a new process and industry engagement period intended to streamline and improve the Open Season experience:

1. Comment Collector Period – Contractors will have the opportunity to review and provide feedback on applicable Federal Vehicle Standards.

2. Bid Intention Submission – Contractors will be asked to indicate which existing and new makes and models they intend to submit.

Please note: Bid Intention Period will be the only opportunity to propose new makes and models.

Important Dates:

• Comment Collector Opening in GSAFleet.gov: June 2, 2025
• Bid Intention Period Opening in GSAFleet.gov: June 2, 2025
• Comment Collector Opening in GSAFleet.gov:  June 30, 2025
• Bid Intention Period Opening in GSAFleet.gov: June 30, 2025
• Fall Open Season Industry Day: September 17, 2025
• Bid Opening in GSAFleet.gov: September 22, 2025
• Bid Closing in GSAFleet.gov: October 29, 2025 at 12:00 PM Eastern Time
• Supplemental Documents Due (if applicable): October 29, 2025 at 12:00 PM Eastern Time

We will provide additional details as they become available.

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2025 SPRING OPEN SEASON

Update March 31, 2025 

Open Season Bid closing dates are hereby updated as follows:

Open Season Bid Closes in GSAFleet.gov: April 4, 2025 at 12pm Eastern Time
Supplemental Documents Due (if applicable): April 4, 2025 at 12pm Eastern Time

Update March 5, 2025

GSA is providing the following updates in support of the 2025 Spring Open Season:

1) Thank you for your attendance at the Open Season Industry Day Conference held on March 3, 2025. Should vendors or potential offerors wish to view the recording of the conference, please request a GSA Affiliated Customer Account (GACA) to gain access. Instructions for obtaining a GACA are attached. Once approved, offerors may access the recording at the following link: https://drive.google.com/file/d/11CEAbOX_5btrD_YwVVVzL374mOoI2QGM/view (cut and paste the address into your browser).

2) GSA has added the following attachments in support of this Open Season:

• GACA Instructions
• Open Season Industry Day Slides

Note: Open season submissions will be evaluated in accordance with the terms and conditions located in Section C - Open Season of the respective contracts. All price increases shall be subject to review and approval. Increases in pricing for currently awarded models that cannot be justified will not be considered fair and reasonable. Price changes will be considered for the next model year vehicles, and new models that were not previously awarded, as well as any changes in the initial basis of award that includes new equipment, engines and optional equipment that has become standard equipment.

February 24, 2025:

Under solicitation 47QMCA24R0006, 2025 Main Bus Program, GSA is announcing the FY25 Spring Open Season period for existing contractors to provide new model year (NMY) information on awarded line items, as well as for existing contractors or new interested offerors to propose new models under the program. Please see the attached Special Notice for full details. GSA will hold a virtual Industry Day on Monday, March 3, from 9:00am – 10:00am Eastern Standard Time (EST) to go over the Open Season process. All interested parties should attend.

Important Dates:

Open Season Industry Day w/ Vendors: March 3, 2025
GSAFleet.gov Account Requests Due: March 3, 2025
Open Season Bid Opens in GSAFleet.gov: March 3, 2025
Open Season Bid Closes in GSAFleet.gov: March 31, 2025 at 12pm Eastern Standard Time
Supplemental Documents Due (if applicable): March 31, 2025 at 12pm Eastern Standard Time

Spring Open Season Conference | OCONUS & Main Bus
Monday, March 3 · 09:00 – 10:00 
Time zone: America/New_York
Google Meet joining info
Video call link: https://meet.google.com/paf-deya-kad
Or dial: ‪(US) +1 267-553-4614‬ PIN: ‪600 661 238‬#
More phone numbers: https://tel.meet/paf-deya-kad?pin=3859887371943

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October 7, 2024:

UPDATE October 7, 2024 - Note the due date for Bid2 documentation and FPR responses, scheduled to close today at 4pm EDT, is extended until Wednesday, October 9, 2024 4pm EDT. (No new offers will be accepted).

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September 25, 2024:

UPDATE September 25, 2024 - AMENDMENT #004 TO THE FINAL SOLICITATION AND ATTACHMENTS (3) ADDED. Note the due date for offers is not extended from August 13, 2024 (No new offers).

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August 2, 2024:

UPDATE August 2, 2024 - AMENDMENT #003 TO THE FINAL SOLICITATION AND ATTACHMENTS (3) ADDED. Note the due date for offers is not extended from August 13, 2024.

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July 26, 2024:

UPDATE July 26, 2024 - AMENDMENT #002 TO THE FINAL SOLICITATION AND ATTACHMENTS (3) ADDED. Note the due date for offers is extended from July 30, 2024 to August 13, 2024.

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July 3, 2024:

UPDATE July 3, 2024 - AMENDMENT #001 TO THE FINAL SOLICITATION AND ATTACHMENTS (4) ADDED

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June 18, 2024:

UPDATE June 18, 2024 - FINAL SOLICITATION AND ATTACHMENTS ADDED

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June 11, 2024:

UPDATE JUNE 11, 2024 - PRE-PROPOSAL CONFERENCE DOCUMENTS ADDED

Two attachments have been added to this SAM.gov notification - the slidedeck of the conference held today and the request for a GSAFleet.gov account.

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May 13, 2024:

GSA will hold a virtual Pre-Proposal Conference to review solicitation instructions as well as a take questions and feedback from industry.  All interested parties should plan on attending.

Virtual Conference details and access instructions are as follows:

2025 Main Bus Program Pre-Proposal Conference
Monday, June 10 · 11:00am – 12:00pm
Time zone: America/New_York
Google Meet joining info
Video call link: https://meet.google.com/jpj-jpva-eud
Or dial: ‪(US) +1 401-646-2406‬ PIN: ‪361 241 080‬#
More phone numbers: https://tel.meet/jpj-jpva-eud?pin=6929567684728

Please let us know if you have any questions or concerns. 

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May 10, 2024:

GSA is accepting industry feedback, questions, and comments on the attached DRAFT solicitation document and the associated attachments. This DRAFT solicitation will be posted until June 10, 2024. GSA intends to post the official solicitation document on June 17, 2024. GSA will accept and review industry feedback, questions, and comments at any time during this phase. Note that the Comment Collector period for this Program closed today.