ERP & Operations · Operations & Supply Chain
Should you build or buy Travel & Expense Management?
Travel and expense management software combines trip booking with expense reporting in a single platform — booking flights, hotels, and ground transport against company travel policies, then capturing receipts and routing reimbursements through integrated approval workflows. It gives finance and HR teams visibility into travel spend before it happens, not just after the fact.
The build-vs-buy decision for travel and expense management turns on how much of the booking infrastructure and GDS network access is practically replicable versus how far the market has already compressed pricing through AI-native entrants; the specifics of your travel volume and approval complexity decide it.
Build it, buy it, or bridge?
When building makes sense
Building travel and expense management is a narrow case. The approval workflow and reimbursement logic — submission, policy check, manager approval, payment — is genuinely buildable with OSS tools like ERPNext or Odoo expense modules, and small teams have done it. Where building falls short is the booking layer: GDS network integration for flights, hotel inventory connectivity, and the real-time pricing infrastructure that makes booking useful are not trivial engineering problems. Mobile receipt capture quality is also a gap in most self-built implementations. The most defensible build scenario is an organization that already runs an internal expense platform, doesn't need native travel booking (employees book on personal cards and submit receipts), and wants to avoid monthly per-user charges. That's a real but narrow case. For anything involving meaningful travel volume with policy controls at the booking moment — not just at reimbursement — the build path becomes significantly more complex.
When buying makes sense
Buying travel and expense management is the sensible call for most organizations, and the pricing compression from AI-native entrants has made it even more so. Navan offers the base platform at no charge; Ramp's expense layer is free with card usage; Center runs at $12 per user per month — all significantly below legacy SAP Concur's $20–$30 per user. Most of what finance teams actually use — expense submission, mobile receipt capture, approval workflows, and ERP sync — is covered well by the modern mid-tier. GDS booking integration for compliant travel at negotiated rates is also a genuine vendor advantage that's expensive to replicate. Buying earns its keep unless your expense workflows are genuinely non-standard or you're already running an internal platform that can absorb T&E as one more module without meaningful incremental cost.
The desk read
The travel and expense category has compressed significantly on the buy side. Navan and Ramp compete at entry-level pricing that makes legacy SAP Concur economics look hard to defend at $20-30 per user per month. Most of what finance teams actually use, expense submission, mobile receipt capture, approval workflows, and ERP sync, is covered well by the modern mid-tier.
The build case here is narrow. Travel booking specifically requires integration with GDS networks and hotel inventory systems that are non-trivial to replicate. OSS expense modules in ERPNext and Odoo handle the approval and reimbursement workflow, but fall short on mobile receipt quality and native booking integrations. Buying earns its keep unless your expense workflows are genuinely non-standard or you're already running an internal platform that can absorb the T&E surface as one more module.
Frequently asked
What is travel and expense management software?
Travel and expense management software combines trip booking with expense reporting in a single platform — booking travel against company policies, then capturing receipts and routing reimbursements through integrated approval workflows that give finance teams visibility into travel spend in real time.
When does building travel and expense management make sense?
Building is viable for the approval and reimbursement workflow if you don't need native booking integration — OSS tools like ERPNext handle that case. Adding compliant travel booking with GDS network access significantly raises the build complexity.
When does buying travel and expense management make sense?
Buying is the clear call for most organizations — AI-native platforms like Navan and Ramp have compressed pricing dramatically below legacy Concur, and GDS booking integration makes vendor infrastructure genuinely difficult to match for organizations with meaningful travel volume.
What are the main travel and expense management vendors?
Representative vendors include Ramp, Navan (formerly TripActions), SAP Concur, Center (by Paychex). B4 Pro scores the full set.