Data Integration

What is Data Integration?

Data integration is the process of combining information from multiple software systems into a single, consistent dataset that teams can use for reporting, analysis, and decision-making. In corporate travel and expense management, this means connecting the systems where spending happens (booking tools, corporate cards, expense apps) with the systems where spending is recorded (ERP, general ledger, HRIS).

The concept sounds straightforward, but the execution rarely is. A mid-size company with 200 traveling employees might generate booking confirmations in one system, corporate card transactions in another, and expense reports in a third. Each source uses its own data formats, field names, and timing. Without integration, someone on the finance team has to manually match flight bookings to card charges to submitted reports before the month can close.

Why Data Integration Matters for T&E Programs

Data fragmentation is the most common operational pain point in corporate travel expense management. When booking, expense, and payment systems don't share data, finance teams spend their time assembling information instead of analyzing it.

GBTA's March 2026 survey of corporate travel buyers quantifies the problem: global travel programs maintain an average of 5.3 separate expense management instances and 5.3 separate online booking tool instances [1]. Only 68% of buyers say booking data flows into a centralized analytics platform. For travel risk management tools, that number drops to 32%.

The downstream effects are concrete. Month-end close stretches because reconciliation requires pulling data from three or more disconnected systems. Expense reports need manual correction when card charges don't match submitted amounts. Expense forecasting relies on incomplete data, which makes budget projections unreliable.

A pharmaceutical company with sales teams traveling across 15 countries illustrates the challenge. Each regional office may use different booking tools, different corporate card programs, and different approval workflows. Without integration, the CFO's quarterly spending report is assembled from spreadsheets emailed by regional finance leads, not from a single data source updated in real time.

How Does T&E Data Integration Work?

T&E data integration connects systems at three levels: data extraction (pulling records out of source systems), transformation (converting those records into a shared format), and loading (pushing the standardized data into the target system). This pattern is commonly called ETL.

The specific mechanics depend on the integration method:

Pre-built connectors: Direct, plug-and-play connections between T&E platforms and accounting systems. These handle the most common fields (transaction date, amount, merchant, GL code, cost center) and work for organizations with standard chart-of-accounts structures. Navan's integrations page lists connectors for NetSuite, Sage Intacct, Xero, and QuickBooks, among others.

API-based integration: For organizations whose ERP or GL system isn't covered by a pre-built connector, REST APIs allow custom data exchange. This approach handles complex GL dimensions, intercompany allocations, and custom business logic, but requires IT resources to build and maintain.

SFTP file transfers: Batch-based integration where expense data is exported as structured files (CSV, XML) and uploaded to the target system on a schedule. Less real-time than API integration, but reliable for systems that don't support modern API protocols.

Middleware and iPaaS: Integration Platform as a Service tools sit between the T&E system and the ERP, handling data transformation, error handling, and retry logic centrally. Large enterprises with complex accounting structures often use middleware to manage connections that would be brittle as direct point-to-point integrations.

Best Practices for T&E Data Integration

Organizations that get integration right follow five principles:

Map data fields before connecting systems. The most common integration failure is schema mismatch. Your T&E platform might label a field "project code" while your ERP calls it "job number." Mapping these fields in advance prevents transactions from landing in the wrong account. Multi-currency expense reports create particular risk: decide whether the booking-date exchange rate or the posting-date rate governs before going live.

Start with the highest-volume data flow. For most companies, that's corporate card transactions flowing into the GL. Getting this connection right first delivers the most immediate time savings for expense approval and reconciliation teams.

Test with real transactions. Run a pilot group of 10-20 travelers through the integrated workflow before company-wide rollout. Check that GL codes map correctly, multi-currency conversions are accurate, and exception transactions (refunds, partial charges, split payments) route properly.

Monitor post-launch. Integration isn't a one-time project. Vendor API updates, chart-of-accounts changes, and new cost center structures can break established connections. Set up automated alerts for failed transactions or unmatched records.

Choose the right integration depth. Not every organization needs real-time, bidirectional data sync. A 50-person company with straightforward accounting may be well served by nightly SFTP file transfers. A 5,000-person global enterprise with intercompany billing likely needs API-level integration with middleware orchestration.

When Should You Consider Alternatives to Direct Integration?

Direct system-to-system integration isn't always the best approach.

Organizations with fewer than 10 travelers per quarter may find that the cost and complexity of integration outweigh the time saved. Manual data entry takes minutes when transaction volume is low.

Companies with ERP systems in the middle of migration should avoid building integrations against a system that will be replaced within 12 months. Temporary workarounds (like SFTP exports into a staging table) bridge the gap without creating technical debt.

Heavily customized ERP environments sometimes break pre-built connectors. When the chart of accounts includes hundreds of custom dimensions, middleware may be more practical than stretching a native connector beyond its design.

Related Terms

• Expense Reconciliation: The process of matching corporate card transactions and receipts to submitted expense reports and general ledger entries.
• Expense Report Automation: Tools and workflows that replace manual expense report creation with automated transaction capture and categorization.
• Expense Management: The broader discipline of tracking, controlling, and reimbursing employee-initiated business spending across all categories.

Sources

[1] GBTA, "Innovation and the Perfect Business Trip: AI, TMC Innovation, and Hotel Distribution," Global Business Travel Association, March 2026, https://gbta.org/research/business-travel-innovation-research-2026/

[2] The Business Research Company, "Travel and Expense Management Software Market Report 2026," February 2026, https://www.researchandmarkets.com/reports/5980305/travel-expense-management-software-market-report

[3] Mordor Intelligence, "Travel and Expense Management Software Market Size & Share Analysis, 2031," 2026, https://www.mordorintelligence.com/industry-reports/travel-and-expense-management-market