Government contractors face travel management challenges that most corporate platforms are not built to handle. GSA per diem compliance, FAR and DFARS regulations, audit-ready expense documentation, and the constant pressure to justify costs on contract budgets all create friction that standard booking tools struggle to address. When a project timeline shifts or a contract modification changes scope, the travel program needs to adapt without losing compliance or eating into margins.
The stakes are measurable. Standard FY 2026 GSA CONUS per diem rates are $178 per day for most locations, consisting of $110 for lodging and $68 for meals and incidental expenses (M&IE), with higher rates in designated non-standard areas. Under FAR 31.205-46, contractor lodging, meals, and incidental expenses are generally considered reasonable and allowable only up to the applicable federal per diem maximums, subject to specified exceptions. A travel management platform that enforces rate caps before booking, consolidates invoicing for clean billing, and adapts when project timelines shift can turn travel from an administrative burden into a controllable line item.
Key Takeaways
- Government contractors should compare travel platforms based on policy enforcement, per diem controls, approval workflows, invoicing, reporting, and the requirements of their specific contracts.
- Engine combines travel booking, policy controls, DirectBill consolidated invoicing, real-time reporting, and 24/7 live support. It has no platform fees, no membership fees, no agent-assist fees, no contracts, and no minimum spend.
- CWT is an established travel management company with U.S. GSA E-Gov Travel Service experience for federal agency travel.
- GO.gov is designed for civilian federal agencies and is separate from the travel platforms contractors use for their own company bookings.
- SAP Concur combines travel and expense management with extensive approval, audit, and ERP integration capabilities.
- Navan combines travel, expense, and corporate card functionality, while Amex GBT and Egencia provide managed travel options backed by global service infrastructure.
- Perk offers multiple travel management plans, including a starter option and optional FlexiTravel cancellation flexibility on eligible plans.
- Contractors should verify each platform’s pricing, implementation requirements, policy controls, integrations, and government-travel capabilities against their contract requirements before selecting a provider.
What Government Contractors Should Look for in a Travel Platform
Government contractor travel differs from standard corporate programs in several ways. Under FAR 31.205-46, allowable contractor travel costs are subject to federal per diem limits and documentation requirements, with exceptions available in specified circumstances. Approval workflows may also involve project managers, contract administrators, and finance teams. And when a contract ends or a project site moves, the travel program needs to adapt without creating unnecessary costs or administrative work.
A practical travel platform for government contractors should help teams:
- Enforce GSA per diem rates and location-based lodging caps automatically
- Route bookings through approval workflows tied to contract or project codes
- Generate consolidated invoices that map to specific contracts and cost centers
- Provide audit trails for every booking, modification, and cancellation
- Support last-minute changes without excessive fees or manual intervention
- Connect with existing finance, HR, and procurement systems
The best platforms let contractors book quickly while building compliance into every transaction behind the scenes.
1) Engine
Engine is a modern travel management platform that consolidates hotel, flight, and rental car bookings into a single dashboard with built-in policy enforcement, consolidated billing, and real-time reporting.
Where It Fits
Engine serves 39,000+ active businesses and has generated $356.4 million in total customer savings, as of September 2026. The platform is particularly useful for government contractors that need to start a travel program quickly without capital outlay. Same-day setup means a contractor awarded a new project can have a compliant booking system running before the first site visit.
The platform operates with no platform fees, no membership fees, no agent-assist fees, no contracts, and no minimum spend.
Key Capabilities
- Travel policies that enforce rate caps, cabin class limits, and approval requirements as hard-stop booking rules
- DirectBill consolidated invoicing where Engine extends a line of credit, pays the hotels, and provides one itemized invoice after stays
- Dashboards and reporting with real-time spend visibility by project, department, or cost code
- FlexPro is a subscription covering all company hotel bookings, with cancellation until noon on check-in day, including non-refundable rates. The default refund is a one-year Engine travel credit. FlexPro costs $299 per month or $2,999 per year.
- Engine Groups for nine or more rooms, with dedicated trip managers who negotiate rates and handle logistics at no additional fee
- 24/7 live support through Eva, Engine's AI assistant, with escalation to live agents by phone, chat, and email
2) CWT
CWT is a traditional travel management company that operates in 145 countries and holds explicit U.S. GSA E-Gov Travel Service approval for federal agency work.
Where It Fits
CWT is a global travel management company with longstanding experience serving government and large enterprise travel programs. Amex GBT completed its acquisition of CWT on September 2, 2025, bringing CWT's customers and employees into Amex GBT. During the transition to GO.gov, GSA continues to identify CWTSatoTravel alongside SAP Concur as one of the two providers under the legacy ETS2 program.
Key Capabilities
- U.S. GSA E-Gov Travel Service approved provider
- RoomIt multi-source hotel platform with negotiated rates
- myCWT app with SAP Concur integration
- Global support across 145 countries
- Full-service travel management with agent-assisted booking
What to Review
CWT requires longer implementation cycles (typically 2-6 months) and higher minimum commitments than modern self-serve platforms. Contractors should evaluate whether the GSA certification is a hard requirement for their specific contracts or whether policy-compliant booking through other platforms meets their compliance needs.
3) GO.gov
GO.gov is the new federal travel platform from the U.S. General Services Administration, launched in 2026 to replace the legacy ETS2 system for civilian federal agencies.
Where It Fits
GO.gov is mandatory for civilian federal agencies, with early adopter onboarding underway and February 2027 deployment. The platform consolidates travel booking and expense management into one system with built-in federal travel compliance. IBM holds a 15-year contract for platform management and continuous improvement.
Key Capabilities
- Mandatory platform for civilian federal agency travel
- Built-in federal travel regulation compliance
- Consolidated booking and expense functionality
- FedRAMP security approval process
- New tools that reduce task completion time for federal travelers
What to Review
GO.gov applies to federal agencies, not to contractors booking their own travel. However, contractors working embedded with federal teams or traveling on federal agency orders should understand the platform and its rollout timeline. Contractors managing their own travel programs will still need a separate platform for company bookings.
4) SAP Concur
SAP Concur is an enterprise travel and expense platform that serves organizations requiring deep compliance controls, complex approval workflows, and ERP integration.
Where It Fits
SAP Concur reports serving 96 million users across 54,000 organizations worldwide, with over 30 years in the business travel and expense space. The platform is particularly relevant for large government contractors (500+ employees) that already operate SAP S/4HANA environments or need enterprise-grade compliance and audit capabilities.
Key Capabilities
- Comprehensive compliance and audit tools for government requirements
- Deep ERP integration, native to SAP S/4HANA
- Joule AI copilot for expense management and automation
- Global operations in 150+ countries
- Transaction-based pricing with enterprise contract flexibility
What to Review
SAP Concur requires significant implementation effort (3-6 months typical). Contractors should evaluate whether the compliance depth justifies the investment and implementation timeline. Organizations without existing SAP infrastructure may find the platform more complex than necessary for their travel management needs.
5) Navan
Navan is a modern travel and expense platform that combines booking, corporate cards, and expense management in a single system with specific features for contractor travel scenarios.
Where It Fits
Navan, publicly traded on Nasdaq since October 2025, reported $9.1 billion in annual gross booking volume and serves over 10,000 companies. The platform includes a Guest Invite solution designed for booking contractor travel, which can support government contractors managing travel for subcontractors, consultants, or temporary project staff.
Key Capabilities
- Guest Invite solution for contractor and subcontractor booking
- Integrated travel, expense, and corporate card functionality
- 24/7 global travel agent support
- Modern user interface with consumer-grade booking experience
- Free tier available for companies up to 300 employees
What to Review
Navan's pricing moves to custom enterprise contracts beyond the free tier. Contractors should evaluate whether the platform's per diem compliance features meet their specific contract requirements and whether the Guest Invite workflow fits their subcontractor management processes. The free tier cap at 300 employees may limit options for growing contractors.
6) Amex GBT
Amex GBT is the largest global travel management company by sales volume, serving Fortune 500 enterprises and large multinational organizations.
Where It Fits
Amex GBT reported $36 billion in annual total transaction value and operates in 140+ countries. The company completed its acquisition of CWT in September 2025, expanding its government contractor capabilities. Large defense contractors and multinational organizations with complex global travel requirements often evaluate Amex GBT for comprehensive managed travel services.
Key Capabilities
- Largest global TMC network with 140+ country coverage
- Multiple platform options including Neo, Egencia, and KDS
- Full-service agent-assisted booking
- Transaction-based pricing with custom contracts
- CWT acquisition brings additional government sector expertise
What to Review
Amex GBT requires 2-6 month implementation cycles and custom contract negotiations. Contractors should clarify which platform (Neo, Egencia, KDS) best fits their needs and whether the CWT acquisition has consolidated or changed government-specific service offerings. Mid-market contractors may find the enterprise focus less accessible.
7) Egencia
Egencia is a mid-market online booking tool owned by Amex GBT, combining Expedia Group heritage with enterprise support capabilities.
Where It Fits
Egencia relaunched in April 2026 with new AI capabilities and enhanced SAP Concur integration. The platform targets mid-market organizations (typically 100-1,000 employees) that want modern booking UX backed by Amex GBT's global support network. Government contractors in this size range may find Egencia a more accessible entry point than full Amex GBT enterprise services.
Key Capabilities
- Conversational AI assistant (Egencia AI) for booking support
- Near real-time SAP Concur expense integration
- Expedia Group travel inventory access
- Tiered pricing with custom contracts
- Backed by Amex GBT global support infrastructure
What to Review
Contractors should evaluate whether Egencia's mid-market positioning provides sufficient compliance depth for government work. The platform's strength is user experience rather than government-specific features. Organizations with strict GSA compliance requirements may need to supplement with additional policy controls.
8) Perk
Perk (formerly TravelPerk) is a mid-market travel platform with transparent pricing and a free starter tier for smaller organizations.
Where It Fits
Perk serves small to mid-market companies with particular strength in European markets. The platform offers a free starter plan, making it accessible for small government contractors (under 50 employees) that need basic travel management without upfront investment.
Key Capabilities
- Free starter plan with multiple tier options
- FlexiTravel: Optional cancellation flexibility for Premium and Pro customers, with at least 80% back guaranteed.
- Self-service booking with 24/7 support
- Carbon offsetting (GreenPerk) options
- Quick implementation (2-4 weeks)
What to Review
Perk's fee structure may become expensive at scale compared to platforms with no transaction fees. Contractors should calculate total cost based on booking volume. The platform's European heritage may mean stronger inventory and support in EU markets than domestic U.S. locations. Organizations with strict GSA per diem requirements should verify that rate cap enforcement meets their needs.
Frequently Asked Questions
What travel regulations do government contractors need to consider?
For contractor travel costs subject to FAR 31.205-46, lodging, meals, and incidental expenses are generally considered reasonable and allowable only up to the applicable federal per diem maximums, subject to specified exceptions and contract terms. The FY 2026 standard CONUS rate is $178 per day for most locations, consisting of $110 for lodging and $68 for M&IE. Contractors should also maintain the documentation required to support travel costs charged to government contracts.
How can a travel platform help manage per diem compliance?
A travel platform with policy enforcement can set maximum nightly rate caps by location that match GSA per diem limits. The platform blocks non-compliant bookings before they happen rather than flagging them after the fact. This approach eliminates post-booking audits and reduces the documentation burden when per diem compliance is built into every reservation.
What is DirectBill and why does it matter for contractors?
DirectBill is Engine's consolidated invoicing solution where Engine extends a line of credit, pays the hotels directly, and provides the contractor with one itemized invoice after stays. This structure simplifies expense reconciliation, eliminates chasing individual receipts, and provides clean documentation for contract billing. With Engine's Incidentals Coverage add-on, travelers skip credit card authorization forms at check-in.
Can smaller contractors use enterprise travel platforms?
Several platforms offer accessible entry points for smaller contractors. Engine has no platform fees, no membership fees, no agent-assist fees, no contracts, and no minimum spend. Perk offers a free starter tier. Navan provides a free tier for companies up to 300 employees. Smaller contractors should calculate total cost based on booking volume to determine which pricing structure works best.
What should contractors consider when choosing between a TMC and a modern platform?
Traditional TMCs like CWT and Amex GBT offer full-service support, government travel experience, and global agent networks, but may require longer implementations and custom contract negotiations. Modern platforms like Engine offer same-day setup and self-service booking, with no platform fees, no membership fees, no agent-assist fees, no contracts, and no minimum spend. Contractors should evaluate whether their specific contracts require a particular government travel program or provider, or whether policy-compliant booking through another platform meets their requirements.
