Best practices for an expense reimbursement policy

17 Sept 2026 · 8 MIN READ

Key takeaways
  • Design a comprehensive policy that accounts for both desk-based purchases and work-related travel to eliminate financial blind spots.
  • Establish a digital-first receipt reporting process that ensures continuous compliance with Internal Revenue Service (IRS) tax criteria.
  • Eliminate ambiguity with comprehensive, jargon-free guidelines that clearly distinguish between reimbursable and non-reimbursable expenses. 
  • Write your guidelines in clear, jargon-free language to build trust and empower your team

In an ideal world, business expenses would all be paid directly from the business, with an invoice or receipt easily accessible. But unexpected out-of-pocket company expenses are an unavoidable part of managing a business. Projects linger, client requirements change, and work trips get extended. 

This means expenses that weren’t part of your original plan are accrued. This additional shadow work costs US businesses $360 billion every year.

However, with a robust expense reimbursement policy in place, unplanned expenses don’t have to derail your finances or create an administrative nightmare.

This guide will demonstrate how to manage business expenses with an employee expense reimbursement policy that’s simple, effective, and helps your team to work with confidence.

What is an expense reimbursement policy?

An expense reimbursement policy aims to provide transparency for employees who have to pay out-of-pocket expenses related to their work. It is a set of guidelines that dictates what out-of-pocket purchases workers can make on behalf of their company, and how and when they will be paid back for work-related expenses. This transparency helps to build trust with your team and ensure that if they need to purchase something to do their job, they can do it quickly to avoid interruption to work.

Any business in which an employee makes a purchase on behalf of the company using personal funds (cash, personal credit card, etc.) instead of a corporate credit card should have an expense reimbursement policy.

An effective expense reimbursement policy must look beyond travel. Out-of-pocket expenses can happen anywhere in your organization, whether a desk-based colleague is purchasing software or a team member is traveling for work. Expanding your policy to cover all roles prevents financial blind spots, protects your budget, and reduces the shadow work of manual tracking across the company.

Example scenarios

Desk-based worker

Vikram urgently needs to purchase a specialized software subscription to complete a time-sensitive project. Vikram does not have access to a company card, and it would be much faster for him to purchase the subscription rather than for his boss to do it. So he can get to work immediately, Vikram uses his personal debit card to buy the subscription and files an expense report with a receipt.

“Even though Vikram feels it’s much faster for him to be able to purchase the software subscription, in reality, the shadow work involved with filing the expense, plus the processing done by the finance team, means that it would be much more efficient to get a colleague to purchase the subscription on a corporate card.”
Stuart Blake, VP of Sales, Perk US

Work traveler

Pat is attending a two-day industry conference when they are unexpectedly invited to a networking event, which costs $40 for a ticket. Pat has already used their daily per diem amount for food and drink, as their company credit card has a strict daily limit. Pat uses their own money to pay for the networking ticket and submits it as a business expense on their return.

“In this situation, if Pat’s company used virtual credit cards, a quick phone call to their boss would mean that the credit card’s daily limit could be manually extended. This avoids all the manual expense processing involved with Pat purchasing the ticket himself.”
Stuart Blake, VP of Sales, Perk US

Out-of-pocket business expenses are usually more common in roles that involve a lot of work travel. Being on the go brings a higher risk of unexpected purchases like cab fares or last-minute supplies for a hosted event.

Travel disruption also plays a part. US companies spend more than $17 billion annually on additional travel expenses due to cancellations or other disruptions.

US companies spend more than $17 billion annually on additional travel expenses due to cancellations or other disruptions.
Source: The State of Travel Disruption 2025

Why do you need an expense reimbursement policy?

Expense reimbursement policies are all about smart financial management, keeping everyone on the same page, and empowering employees to get the job done efficiently.

Here’s how it could help business efficiency:

Employees know exactly what’s covered

With an expense policy in place, workers know exactly what they can claim for. They won’t have to check with the finance team every time they need to make a payment, and you minimize the risk of your team unintentionally breaching company guidelines.

It makes employee spending more predictable

For the person managing your business’s finances, whether it’s the office manager or a designated finance officer, having predictable expenses is key to reducing shadow work. According to The Cost of Shadow Work report, employees waste an average of 7 hours a week on these non-core tasks.

Restrictions such as limits on hotel room costs or specific guidelines for meal expenses help control costs and avoid unanticipated out-of-pocket expenses.

You reduce the risk of expense fraud

Every business is at risk of expense fraud. This is where workers deliberately inflate reimbursements and submit inaccurate expense reports. 

A study from the Association of Certified Fraud Examiners concluded that expense reimbursement fraud accounts for 21% of fraud in small businesses (those with less than 100 workers), and 11% in large businesses (those with 100 or more employees).

A well-written expense policy, as well as an expense management system that flags irregularities, will help you identify anything suspicious. 

It helps to ensure tax compliance 

Having full transparency into expense reports will help you remain compliant and maximize potential tax benefits. There are specific guidelines for reimbursing employees so that these expenses don’t count as taxable income. Above all, they need to meet Internal Revenue Service (IRS) criteria, such as being reported to employers on time.

Case study - mci group
Live and digital communication firm mci group transitioned from manual expense reporting to a new automated workflow with Perk. mci group’s finance team had been spending around 5,000 hours every year processing expenses using Excel.By using Perk to digitize its expense management, the team reduced its expense processing time by 80%.

What to include in an employee expense reimbursement policy

Follow these best practice guidelines to create an employee expense reimbursement policy that suits your business:

Outline how employees should report expenses

This should act as your team’s starting point when they have a business expense to submit. Firstly, workers need to save their receipts so the finance team has full visibility of the transaction. Paper workflows can be risky, so we would recommend instructing your team to adopt a digital-first approach to expense reporting.

Rather than expecting workers to collect paper receipts, which are easily lost and damaged, use a spend platform like Perk to capture receipts at the point of purchase. The mobile app lets workers photograph receipts the moment a purchase is made.

The image is uploaded to the platform and automatically matched to the corresponding transaction, and the expense is created without the need for manual data entry.

You should also set deadlines for filing expense reports so that you can reimburse workers on time.

“We’ve managed to achieve a 90% automation rate, which means that almost every expense gets processed by the tool without any manual approval or review by our finance team.”
Viktor Hegyi, Accounts Payable Specialist at On, and Perk customer

List how you will deliver expense reimbursements to workers

Set expectations for when and how employees will be reimbursed. This will help to build trust and reassure your team that they won’t be out of pocket for long. For example, you could reimburse workers via direct deposit when they get their paycheck, or you could commit to paying expenses within 30 days of submission. It’s just a matter of deciding what works best for your business.

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Define what an acceptable business expense is

Although what counts as a business expense might seem obvious, it will make things a lot easier in the long run if you outline it in your expense reimbursement policy. Gray areas can occur, particularly on work trips. Will you let your workers make expense purchases of alcohol? Is there a spending cap on taxi travel? Do you want to define expenses by category, such as client entertainment, travel, food and drink?

Be sure to outline procedures for handling cancellations or additional costs that may arise during travel.

It can also be useful to list common reimbursable and non-reimbursable expense examples.  

Commonly reimbursed expenses
Typically non-reimbursable expenses
Work travel
Expenses related to commuting to a permanent place of work
Client entertainment
Personal grooming expenses such as haircuts or nail appointments
Food and drink
Lost personal property
Software subscriptions
Upgrades such as first-class travel tickets (unless specifically permitted in your policy)

By defining things like this at the outset, you’ll avoid confusion and instances of non-business expenses being submitted.

Clarify exchange rates 

For work travel expenses in other countries, outline that the exchange rate that will be used for the reimbursement is the one from the day of the purchase. This is why accurate receipt management is key.

Consider employee wellbeing during work travel 

Any policy relating to work travel should be led by employee wellbeing considerations. When it comes to traveling for business, not everyone finds it an enjoyable experience. Latest statistics from World Travel Protection show that 46% of business travelers reported experiencing increased stress and burnout from frequent trips. If there are ways you can make work trips more comfortable, and budget allows, you can include these in your expense policy. For example, if a trip is longer than one week, you may want to let your team expense gym visits. 

Outline the consequences of failing to stick to the policy

By setting out the consequences for failing to abide by the company’s expense reimbursement policy, employees are clear on the process they can expect if they continuously flout the rules.  

Prioritize clarity and test it out 

Your company’s expense reimbursement policy must be clear, specific, and free of confusing jargon. Directly explain the business purpose of the policy to prevent misunderstanding. Before launching your policy, consider testing it on a focus group. Are work-related expenses clearly defined? Can employees get access to the company credit card instead of paying out of pocket? Get feedback to determine whether or not the policy has clauses that can be misinterpreted and make adjustments as needed.

Automate your expense reimbursement process with Perk

Perk’s intelligent travel and spend platform can automate your expense reimbursement process for speed and efficiency. Receipt collection is quick, transactions are easily reconciled, and out-of-policy expenses can be flagged in real-time.

See the platform in action by requesting a demo today.

Written by

Philippe Sahli
Philippe Sahli

Chief Spend Officer, Perk

Philippe Sahli has spent his career making corporate finance simple and more intelligent. As Chief Spend Officer at Perk, he leads the charge on transforming how businesses manage spend, from expenses and invoices to smart corporate cards. Before joining Perk, Philippe founded Yokoy, an AI-powered spend management platform built to bring automation to finance teams. When Yokoy was acquired by TravelPerk, it became the foundation for what Perk is today: a single AI-native platform for travel, events, and spend. Philippe's background spans both high-growth startups and global finance. He served as CFO at Swiss scaleup Beekeeper and held management roles at Credit Suisse and UBS. In 2021, Forbes recognised him in their 30 Under 30 list for bringing together innovative thinking and an ambitious vision.
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