How to Choose Expense Management Software: 5 Steps

Contents

1. Engage the user base
2. Define the functions you need
3. Technology considerations
4. Choose a spend-capture model
5. Find the right partner

Finance can’t pause mid-quarter for a clumsy software rollout. Month-end, payroll, supplier payments and statutory filings all have to keep running through the change. That’s what makes choosing an expense management system a complex decision, whatever the size of the business. Smaller teams want something that works out of the box. Enterprises need multi-subsidiary consolidation, matrix approvals and deep two-way ERP integration. The goal is the same: real-time visibility and control over spend, with as little friction for the people claiming as possible.

The five steps run in order. Each one answers a question the next one depends on.

1. Engage the user base

Adoption makes or breaks the return on any finance system. If the interface doesn’t work the way people work, they’ll find a way round it: delaying submissions, or sending bad data that clogs up accounts payable.

Segment your claimants. Someone who claims once a year has almost nothing in common with a regional sales director claiming travel, mileage and subsistence every week. The system has to suit both.
Think about where people work. Field and site staff need a fast, mobile-first app that copes with poor signal. Desk-based staff want a proper browser view, bulk uploads and spend history.
Think about approvers. A smaller business may need one sign-off. A larger one needs claims routed by project, department budget or spend threshold, without anyone rerouting them by hand.

Action: shadow a representative sample of claimants and managers before your first vendor conversation, so you can separate the must-haves from the nice-to-haves.

2. Define the functions you need

Modern platforms do far more than digital data entry. They enforce policy, protect compliance and increasingly track carbon too.

Capability	What to look for
Integration	Two-way integration with your accounting platform, ERP, HR and payroll
Receipt capture (OCR)	A proven recognition engine that pulls merchant, date, amount and tax data into a claim in seconds
Policy engine	Soft and hard rules that flag out-of-policy claims, catch duplicates and block missing receipts before they reach the approver
Multi-currency and VAT	Exchange rates applied automatically, with correct VAT logic, including mileage and fuel
Approvals and mobile	Managers can review, query, approve or reject from their phone, with the receipt image in view
Reporting and audit trail	An unbroken trail from submission through to the general ledger

Getting this wrong is expensive. Every standard-rated receipt that goes missing costs a sixth of its value in VAT you can’t reclaim: £5 on a £30 receipt. HMRC mileage rates drop from 55p to 25p a mile after 10,000 business miles in a tax year, and electric vehicles are reimbursed differently depending on where they were charged. A system that can’t apply those rules hands the work back to finance.

3. Technology considerations

A new expense system has to fit the technology you already run.

Map your systems. Know how expense data maps to GL codes, tracking categories, entities and projects, and make sure the platform can carry your structure without workarounds or double entry.
Card feeds. Daily feeds from your card provider, matched automatically to receipts, take reconciliation out of month-end.
Hosting and security. Check secure hosting, GDPR compliance and any data residency requirements.
The business case. Combine operational savings (less admin for claimants, managers and finance) with hard savings (fewer duplicate payments, less fraud, more tax reclaimed).

Action: build the ROI case before you sign anything. The ROI Calculator is a good place to start, and The business case for expense management automation shows you how to take it to the board.

4. Choose a spend-capture model

It used to be a choice: corporate cards for a few executives, or everyone pays and claims it back. It doesn’t have to be either.

	Expense cards	Reimbursement
Best for	Frequent travellers, field sales, high-volume purchasers	Occasional claimants and desk-based staff
Where control applies	Before the spend: limits and merchant blocks at the point of sale	At submission: policy checks and manager review
How it reaches the ledger	Transactions sync within 24 hours, matched to the receipt	Receipt captured in the app, then paid straight to the employee

Run both in one platform, under one policy engine and one reporting dashboard, and you get the right tool for each type of spend without two data feeds to reconcile.

5. Find the right partner

Buying an expense platform is the start of a long relationship, not a one-off purchase.

Willingness. A good partner takes time to understand your ERP and compliance needs, and plans a phased implementation.
Support. Look for in-house support across time zones, not an outsourced call centre or a ticket queue.
Commercial transparency. Know what is in the core licence and what is an add-on. Per-active-user pricing means you only pay for people who actually claim.
UK compliance. The platform should understand HMRC mileage rates, VAT extraction and Making Tax Digital by design.

Action: write an RFP that asks for evidence: track record, client retention and support SLAs, with a clear breakdown of pricing. Before you sign, check you’re not making one of the five common missteps on the road to expense management maturity, and test your shortlist against the 3 key expense management requirements.

With Webexpenses, cards and reimbursement run from one licence, under one policy engine, with OCR receipt capture, statutory mileage rates and native integration with your accounting system.