Managing expense reimbursements at scale: challenges and best practices

Updated: September 2026

Expense reimbursement is the process of paying employees back for approved work-related purchases they made with their own money. To manage reimbursements across different countries, use one global process for submission and approval, then apply local rules for tax, documentation, mileage, per diem, currency conversion, and payment.

That balance matters most in companies with multiple entities. A consistent employee experience keeps claims moving, while country-specific controls protect the business from incorrect tax treatment, missed VAT recovery, and weak audit records.

Large organizations tend to face the same pressure points:

• High claim volumes create more transactions, receipts, approvals, and payment records to manage.

• Different entities and departments often use different policies, approval paths, and accounting systems, which creates delays and inconsistent decisions.

• Employees traveling for work need to capture receipts, submit claims in multiple currencies, and follow both company policy and local compliance requirements.

• Finance teams need a complete audit trail that proves each claim was legitimate, properly approved, and treated correctly for tax purposes.

Automation does not reduce control. It makes control practical at scale by applying rules consistently before a claim reaches finance. With the right spend management software, teams can replace receipt chasing and manual checks with real-time visibility, automated policy validation, and cleaner data for month-end.

Most common types of reimbursable expenses

Most reimbursable expenses fall into a small number of categories. Defining those categories clearly is the foundation of an effective expense reimbursement policy, especially when employees incur costs in different countries.

Travel expenses

Travel expense reimbursement covers the costs employees incur while traveling for work, including flights, rail, public transportation, taxis, accommodation, meals, and incidentals. These costs should be categorized separately because their documentation, tax treatment, and policy limits often differ.

For international travel, the policy should also record the country where the expense occurred, the original transaction currency, the exchange rate used, and the business purpose. This gives finance a clear basis for reimbursement, accounting, and tax treatment. A connected travel and spend management platform brings travel booking and expense data into one place, so the trip context is already available when an employee submits a claim.

Vehicle costs usually need their own rules, particularly when employees use personal cars for work.

Mileage reimbursement

Mileage reimbursement pays employees for business distance traveled in a personal or company vehicle. Unlike a train ticket or taxi fare, mileage claims are calculated from distance, a rate, and trip details rather than a receipt for the full cost.

The reimbursement rate may be set by your company, local authorities, collective agreements, or a combination of these. It can account for fuel, maintenance, depreciation, and vehicle running costs. The two most common approaches are:

• A fixed rate, where the employee receives the same amount per mile or kilometer. For example, a company may reimburse $0.50 per mile.

• A variable rate, where the amount changes according to vehicle type, fuel costs, annual mileage, or the reason for travel.

A fixed rate is easier to administer, while a variable rate can better reflect local rules and operating costs. For multi-country teams, the key is to apply the relevant rate for the employee, entity, and jurisdiction rather than using one domestic rate everywhere. Our guide to mileage reimbursement explains the core calculations and policy considerations.

Meal reimbursements

Meal reimbursement covers approved food and drink costs incurred during travel for work or other eligible activity. Companies typically use either actual-cost reimbursement or a daily allowance, depending on the type of trip and local requirements.

With actual-cost reimbursement, employees submit itemized receipts up to a defined limit. With a per diem, the employee receives a fixed allowance and may not need to submit individual meal receipts, depending on the local rules. Both approaches need clear policy boundaries around alcohol, client entertainment, hosted meals, personal costs, and meals already included in accommodation or event fees.

For international travel expense reimbursement rules, the destination matters. A meal allowance that is appropriate and tax compliant in one country may be insufficient, excessive, or taxable in another. Your policy should identify the country rule that applies, usually based on the employee’s employing entity and the location of the trip.

Lump sums / per diem allowances

A per diem is a fixed daily allowance for approved travel costs, usually meals and incidental expenses. It gives employees a predictable amount to work with and reduces the receipt-level administration that comes with actual-cost reimbursement.

A strong per diem program uses a consistent global approach while allowing country and destination rules to vary. That distinction is essential for managing employee expenses across countries fairly and compliantly.

Per diem and actual-expense reimbursement can work together. Many companies reimburse lodging at actual cost while using a daily allowance for meals and incidentals. The right mix depends on your travel patterns, the local tax position, and the level of control your policy needs.

Perk can calculate and apply per diems and allowances according to predefined rules for each entity and destination. That removes manual rate lookups and helps teams apply the right rule when an employee crosses borders. Explore our guide to per diem allowances for business travel or use the per diem calculator to understand how daily allowances are calculated.

Receipt expenses

Receipt expenses are individual purchases that employees submit with proof of payment. They include costs such as office supplies, team meals, parking, mobile data, or one-off travel purchases that were not booked through the company.

These claims are straightforward when employees capture the receipt at the point of purchase and add the business purpose while the details are still clear. They become costly when finance has to chase missing documents weeks later. Automated receipt capture and categorization reduce that shadow work and give teams cleaner data from the start.

Challenges in the employee expense reimbursement process

Expense reimbursement becomes difficult when manual work, poor visibility, fraud risk, and growing volumes compound one another. These issues are especially acute for companies managing employees, entities, and travel across countries.

Manual, time-consuming process

Manual reimbursement processes are slow because they rely on paper receipts, spreadsheet entry, email approvals, and repeated checks. Every handoff creates another opportunity for missing information, duplicate effort, or a delayed payment.

Research cited by the Global Business Travel Association found that manual processing of a single expense report can take about 20 minutes and cost roughly £45, with a 19% error rate requiring correction. Those corrections create avoidable work for employees, approvers, and finance teams, while delaying a reimbursement that should have been routine.

The problem grows across borders. Finance may need to validate foreign currency amounts, confirm the destination country, check local receipt requirements, and determine whether the reimbursement should be treated as a business expense or a taxable benefit. That is too much manual work to leave to spreadsheets at scale.

Lack of visibility and control

Without a centralized system, finance only sees employee spending after it has happened. By the time a receipt reaches an approver, the company may have already lost the chance to guide the purchase, enforce a limit, or request the right tax documentation.

A connected expense process gives finance a single view of claims, card transactions, policy exceptions, and reimbursement status across entities. That visibility supports faster decisions and better forecasting, while employees get clearer guidance before they submit an expense.

Risk of error and fraud

Manual reimbursement processes increase the risk of duplicate claims, incorrect amounts, policy breaches, and fraudulent expense reports. Common examples include submitting the same receipt twice, claiming an incorrect per diem, entering the wrong exchange rate, or seeking reimbursement for a personal purchase.

Cross-border claims create further risk because local rules can change the tax outcome of the same expense. A reimbursement may be valid commercially but still require different payroll, VAT, or documentation treatment in the employee’s country.

With spend management software like Perk, AI validates expense submissions against configured policy rules, detects potential duplicates, and flags anomalies for review. Instead of asking finance to inspect every routine claim manually, the system directs attention to exceptions that need a decision.

Complexity due to volume

High transaction volumes turn reimbursement into a resource drain when every claim follows the same manual path. As the company grows, approval chains, legal entities, currencies, and country rules multiply. Employees face more uncertainty, while finance spends more time answering the same questions and correcting the same errors.

A standardized process removes that friction. Employees submit through the same interface, managers approve through the same workflow, and finance receives consistent data across entities. Expense management tools make this possible by automating receipt capture, policy checks, approvals, and reporting, which helps reduce the workload for finance teams without weakening governance.

Manual vs. automated expense reimbursement comparison

Automated expense reimbursement reduces the work required to capture, validate, approve, and reconcile a claim. The difference is not simply speed. It is the difference between a process that depends on people remembering every rule and one that applies those rules consistently.

Best practices for automating the expense reimbursement process

The most effective reimbursement programs combine a clear policy with automation. Start by understanding the current process, define the rules that apply globally and locally, then configure technology to handle routine work in the background.

To reduce reimbursement processing time, remove manual data entry, route compliant claims through automatically, connect approved data to your finance systems, and use corporate cards for everyday spend where possible. Each step removes a different source of shadow work.

1. Map the process

Map the reimbursement process from purchase to payment before automating it. This shows where claims stall, which information is missing, and where finance is rekeying data that already exists elsewhere.

Include each person and system involved:

• Employees capture receipts, enter the business purpose, choose an expense category, and submit an expense report.

• Managers review claims, approve routine spend, and assess documented exceptions.

• Finance checks policy, tax, VAT, currency, coding, reimbursement, and posting to the accounting system.

• Local payroll or finance teams may need to process amounts that are taxable or must be paid through a local entity.

For international reimbursement, map the country-specific points too. Identify which entity employs the person, which local policy applies, what reimbursement currency they receive, how foreign exchange is calculated, and whether the payment must pass through payroll. Once these decisions are explicit, they can be configured and applied consistently.

2. Clarify the internal policies, rules and regulations

A good expense reimbursement policy has a global core and local rules beneath it. The global core should define eligible categories, receipt requirements, submission deadlines, approval paths, prohibited expenses, and the expected business purpose. Local rules should determine what varies by jurisdiction, including taxability, per diem limits, mileage rates, VAT or GST requirements, payroll treatment, local payment methods, and record retention.

A clear expense reimbursement policy gives employees one understandable process without pretending that every country has the same rules.

The table below illustrates why international policies need local controls.

International travel expense reimbursement rules also affect currencies and tax documentation. Employees should submit the amount actually paid in the original currency. The system should record the transaction date, exchange rate, reimbursement currency, and accounting value, rather than relying on employee calculations.

For VAT or GST, capture the tax amount separately and collect the locally valid invoice or receipt required for recovery. Finance should also separate ordinary work expenses from taxable benefits. When a payment is taxable in a specific country, it may need to flow through the relevant payroll process instead of being treated as a standard reimbursement.

Perk supports multi-entity expense policies with localized controls for currencies, tax and VAT, and per diems by visiting country. Its expense management solution helps teams apply those rules in the workflow while maintaining one source of truth. For more on foreign currency controls, read our guide to global business travel and multi-currency spend.

3. Automate the expense reimbursement process

Automation works best when it applies the policy you have already defined. It reduces the repetitive work around data capture, approvals, compliance checks, and reporting, while preserving a clear route for genuine exceptions.

Expense submission

Automated submission starts with capturing expense information at the point of purchase. Employees can upload or photograph a receipt, while the system extracts key details and creates the claim with the right supporting information.

Perk helps automate the expense management process by capturing receipt data, categorizing transactions, and retaining the business context of each claim. For card spend, the transaction can be matched to the receipt in real time, reducing the work required to reconcile expenses later.

That matters for international claims. The expense record should preserve the original currency and transaction amount, then apply the correct conversion and entity rules. Employees do not need to become exchange-rate experts just to be reimbursed fairly.

Approval workflow

An automated approval workflow routes claims based on rules such as amount, category, country, entity, employee group, or policy exception. Routine compliant claims can move quickly, while claims that need judgment go to the right approver with the relevant context.

Perk supports automated approval workflows, including thresholds for compliant expenses and exception handling when the system detects a policy breach, a duplicate, or a potential fraudulent expense. This lets approvers focus on decisions that need their attention instead of reviewing every low-risk claim.

Policy enforcement

Policy enforcement should happen before payment, not during a later audit. A well-configured system checks the claim against the relevant global and local policy, then flags missing receipts, unsupported categories, overspend, invalid per diem calculations, and other exceptions.

With Perk, policies can be configured at the organization and legal entity level, so employees follow the correct rules without working through a separate manual checklist. The system highlights the reason for an exception, which gives employees a clear way to correct the claim or provide a justification for review. Learn more about compliance controls for travel and spend.

Reimbursement and reporting

Once a claim is approved, the final step is accurate payment and clean reporting. Reimbursement data should flow into the relevant accounting and payment process without requiring finance to rekey transaction details.

Centralized reporting then gives teams a real-time view of spend by entity, country, employee, category, currency, and policy status. That makes it easier to spot recurring exceptions, improve per diem settings, monitor foreign exchange exposure, and prepare a complete financial audit trail.

Best practices checklist

1. Document the full reimbursement workflow, including local payroll or payment steps for each entity.

2. Create a global expense policy with country-specific rules for tax, documentation, mileage, per diems, and reimbursement currency.

3. Record original currency, transaction date, exchange rate, reimbursement currency, and accounting value for every foreign currency claim.

4. Set approval thresholds based on category, value, entity, and risk level.

5. Require the documentation needed for local tax and VAT or GST treatment.

6. Use automated duplicate detection and policy checks before claims move to payment.

7. Connect expense data to your ERP, accounting, and payroll processes where taxable reimbursements require local reporting.

8. Review country rules and automated controls regularly as regulations and rate tables change.

Use smart corporate cards for full visibility

The fastest way to simplify reimbursement is to reduce the number of expenses employees pay for personally. Smart corporate cards let the company pay directly, giving employees less out-of-pocket spend and giving finance immediate visibility into transactions.

A smart corporate card combines a payment method with real-time controls and expense data. Instead of waiting for an employee to submit a reimbursement claim after the trip, finance can see the transaction when it occurs, apply limits, and match receipts automatically.

With Perk corporate cards, teams can set spending controls, capture transactions in real time, and reconcile card spend with receipts. This is particularly useful for international teams because it reduces the need for employees to front foreign currency costs and then wait for reimbursement.

Corporate cards do not replace a reimbursement process entirely. Employees may still need to claim mileage, personal-card purchases, cash expenses, or allowances. They do, however, remove a large share of routine travel and work spend from the reimbursement queue, leaving finance with fewer claims and better data.

Perk customers who add spend management alongside travel see a 79% reduction in expense processing costs and a 5.5x return on investment. DO & CO achieved a 550% ROI after combining Perk smart cards with its expense management tool.

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