How to automate

How to Automate Expense Approval

Approving an expense (lunch, travel, small purchase) often takes 5-10 days from submission to reimbursement. That frustrates employees and burns finance time. Here's how to drop it under 24 hours.

Common challenges

Employees waiting days for reimbursement approval

Managers buried under dozens of approval tickets

Expense policies applied inconsistently

Incomplete audit trail — hard to verify at audit

Over-budget expenses caught months later

Concrete steps

  1. 01

    Define a clear expense policy

    Thresholds (under $100 auto-approved, over $500 manager approval, over $5K CFO), allowed categories, required documentation. This is the foundation.

  2. 02

    Capture the expense digitally

    Employee photographs receipt in app/Slack. AI extracts: vendor, amount, tax, date, category. No manual entry.

  3. 03

    Auto-validate

    System checks: within policy? Vendor on allowed list? Right category? Documentation complete? Only exceptions escalate to humans.

  4. 04

    Auto-route

    Based on thresholds: auto-approved (under $100), direct manager (101-500), department head (501-2000), CFO (2001+). Instant Slack/Teams notification.

  5. 05

    One-click approve

    Approver sees receipt + context + relevant policies. Approves or rejects with one click. Under 30 seconds per expense.

  6. 06

    Reimbursement and accounting

    Approved expense goes into next payroll cycle (employee reimbursement) or to accounting (ERP entry). Full audit trail kept.

Common tools

Spendesk, Pleo, Soldo (cards + integrated apps)Brex, Ramp for larger companiesOpenAI / Claude for receipt OCR + classificationSlack/Teams for approvalsCustom orchestration solutions

When to build custom

Build custom if you have complex policies (multi-entity, multi-country), deep ERP integration (SAP, NetSuite), or specific compliance requirements (tax audit, EU funds). For SMBs, Spendesk/Pleo + accounting integration may be enough.

Frequently asked questions

Does AI read receipts accurately? +

For typical receipts (chains, restaurants, taxis), 95-99% accuracy. For rare/poorly written ones, 85-90% — and we escalate to humans for confirmation.

How much does approval time drop? +

Typical 5-10 days → under 24 hours (about 80-90% reduction). Expenses below thresholds approved in seconds.

How do we handle fraud? +

AI detects suspicious patterns: duplicate receipts, unusual amounts for category, systematically just-below-threshold expenses, etc. Annual auto-audits.

Can I integrate with corporate cards? +

Yes. Tools like Spendesk, Brex, Pleo issue virtual cards and integrate directly with the approval workflow. No lost receipts.

How long does implementation take? +

For a standard workflow (with Spendesk/Pleo), 4-6 weeks. For custom integration with internal ERP, 8-12 weeks.

Related case study /#/case/hr-payslip-review-automation →

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