Expense reimbursement explained: A complete guide

Expense reimbursement is the process of paying employees back for business-related costs they've covered with their own money. As a business owner, you know sometimes your team incurs expenses for travel, supplies, training, and more. But do you have a good system in place for the reimbursement of expenses?

Building an expense reimbursement program at your company helps you stay compliant with state and local laws and keep spending under control.

What is expense reimbursement?

Employee expense reimbursement is exactly what it sounds like: the process of reimbursing an employee for work-related expenses they paid for with their own personal funds.

It's a payment you make to your employees to repay them for any out-of-pocket expenses they cover while carrying out their job duties. This differs from salary or wages. It's a repayment for job-related expenses, not compensation for work performed. Here are some key factors of reimbursement:

• Business purpose: The expense must relate directly to your company's operations
• Out-of-pocket payment: The employee pays first using personal funds
• Documentation required: Receipts for reimbursement prove the expense occurred
• Repayment: You return the reimbursed costs to the employee

Typically, this will be a dollar-for-dollar match, which you can either add to an employee's regular paycheck or issue as a separate payment via check or ACH direct deposit.

How the expense reimbursement process works

Most companies follow a standard expense reimbursement process, from the moment an employee incurs an expense to when they receive payment. Reimbursement of payment typically takes 1–2 weeks.

1. Employee incurs a business expense

The process begins when an employee pays for an authorized, work-related cost with their personal funds. Examples include booking a flight for a client meeting, grabbing supplies from an office store, or covering a client dinner.

2. Employee submits an expense report with receipts

Next, the employee submits an expense report that includes the date, amount, vendor, and business purpose of the expense. Receipts for reimbursement are essential documentation, which is why an employee would include them with the reimbursement form. The more detail they provide up front, the more quickly the approval process moves.

3. Manager reviews and approves the request

HR or a manager then reviews the request, verifying that the expense aligns with company policy and that all documentation is complete. Some approval workflows are shorter than others, but the goal is always the same: confirm the expense meets the proper criteria before sending it to the accounting department.

4. Finance processes the reimbursement payment

Finally, the accounting department issues the expense payments. This can be done through payroll or direct deposit. While expense reimbursement through payroll is common, it's not the only method. Some companies issue separate checks or ACH transfers to keep reimbursements distinct from regular compensation.

Why employee expense reimbursement matters

Employee expense reimbursement is important for maintaining trust, ensuring compliance with state laws, and keeping your financial records accurate. Some jurisdictions legally require you to reimburse employee expenses. California's Labor Code 2802, for example, mandates that employers reimburse workers for all necessary business expenditures.

Technically speaking, at the federal level, employers aren't required to reimburse employee business expenses unless those expenses drop an employee's wages below the federal minimum wage. However, some states, and even certain cities, have their own expense reimbursement laws.

Regardless of whether you're legally required to do so, failing to reimburse employees for legitimate expenses they incur on the job puts your business at risk. Here's why it matters:

• Employee satisfaction: Workers shouldn't bear the financial burden of company costs. If they do, you'll eliminate their incentive to make purchases, even when they're business-critical.
• Legal compliance: Some states mandate reimbursement for necessary business expenditures. Ignoring these laws can expose you to penalties and lawsuits.
• Financial accuracy: Proper tracking ensures correct expense categorization for accounting, giving you better visibility into your budget and spend management
• Tax benefits: When you reimburse employees for work-related expenses, you can deduct many of those costs come tax time, effectively lowering your taxable income for the year

This doesn't mean you should only reimburse expenses that are deductible. But limiting non-deductible expenses whenever possible is important to your company's long-term financial health.

What expenses qualify for reimbursement?

Reimbursable expenses for employees vary by company policy, but most fall into common categories. Having a clear policy is essential to define what is a reimbursable expense—and what isn't.

Business travel

Many employees travel as part of their job. Business travel includes trips to meet with customers, clients, prospects, suppliers, distributors, and other partners. It may also involve company retreats, all-hands meetings, networking events, and conferences.

If your employees pay out of pocket to cover any travel costs, those are typically reimbursable as long as they meet the requirements outlined in your company's travel reimbursement policy. Examples of business travel expenses can include costs related to:

• Flying: Airfare, baggage, travel documentation (such as passports), in-flight purchases (such as Wi-Fi)
• Driving: Rental cars, taxi and rideshare fares, gas, parking fees, tolls, mileage reimbursement for use of a personal vehicle (whether you choose to reimburse the standard mileage rate or actual expenses)
• Lodging: Hotel bookings, long-term rentals, housekeeping fees, tips
• Communication: Cell phone data plans, Wi-Fi, hotspots
• Other travel costs: Train tickets, ferry fares, other forms of travel

Companies typically set spending limits or require pre-approval for these expenses.

Meals and entertainment

Reimbursing employees for meals and entertainment can sometimes get tricky. Generally speaking, these expenses are reimbursable if they have a clear business purpose or you can directly tie them to the employee's duties. Personal meals usually don't qualify for reimbursement.

Meals an employee purchases while traveling are typically considered reimbursable as long as they're not extravagant. The same goes for meals and entertainment related to business meetings, customer or client meetings, and team-building activities.

Expenses include restaurant meals, tips, and service charges. You can also reimburse ready-made meals, groceries, or ingredients if an employee cooks for themselves during travel.

Office supplies and equipment

If an employee uses their money to purchase supplies or tools necessary to complete their job, those costs are often considered reimbursable. This applies to both in-office and remote workers. Common examples include:

• Office supplies: Pens and pencils, paper and other stationery, cleaning supplies
• Electronics: Computers, monitors, printers, fax machines, business phones or smartphones, software subscriptions
• Tools and equipment: Plumbing tools, electrical tools, carpentry tools, or any other tools your employee needs
• Uniforms and work gear: Including dry cleaning or laundering costs during travel

Many small businesses offer remote employees a home office stipend to cover these and other business-related expenses. Stipends can be a one-time disbursement or monthly, quarterly, or annual allowances.

Professional development and training

When your team completes additional training or learns new skills, it can empower them to do their job more efficiently. With this in mind, many employers offer their workers professional development stipends they put toward costs such as:

• Tuition for workshops, courses, certificates, and even advanced university degrees
• Exam fees related to certifications and recertification
• Educational supplies such as textbooks, software subscriptions, and other educational materials
• Attendance at conferences, seminars, and other types of networking events

Remote work expenses

Remote work has made this category increasingly important. Home internet, phone bills, and home office equipment such as desks, chairs, and monitors are all common reimbursable expenses for remote employees.

Some states now require employers to reimburse these costs. Even where it's not legally mandated, offering a remote work stipend, whether monthly or one-time, helps attract and retain talent. You can manage these through a formal reimbursement policy or through corporate card restrictions that let employees purchase approved items directly.

Are expense reimbursements taxable?

Whether expense reimbursements are taxable depends on whether your business uses an accountable or non-accountable expense reimbursement plan. Under an IRS-approved accountable plan, reimbursed expenses aren't considered income and aren't taxable. The key is understanding what makes a plan accountable versus non-accountable.

Accountable reimbursement plans

When you use an accountable plan, as defined by the IRS, your employees' expense reimbursements aren't considered taxable income. For a plan to qualify as accountable, it must meet three IRS requirements:

1. Business connection: The expense must relate directly to the employee's work duties
2. Timely reporting: The employee must substantiate the expense within a reasonable period, generally within 60 days of when it was incurred
3. Return of excess: Any excess reimbursement or advance must be returned to the employer within a reasonable period

When all three conditions are met, are employee expense reimbursements taxable? No. They stay off the employee's W-2 entirely.

Non-accountable reimbursement plans

If any of the IRS conditions above aren't met, the reimbursement falls under a non-accountable plan and becomes taxable income. Your business must withhold payroll taxes on any non-accountable reimbursements, and your employees must report them as income when filing their taxes.

When reimbursements become taxable income

Reimbursements can shift from non-taxable to taxable in a few common scenarios:

• Missing documentation: The employee doesn't provide receipts or adequate proof of the expense
• Mixed expenses: Personal expenses are bundled with business ones, and the personal portion isn't separated out
• Excess funds not returned: The employee receives an advance or per diem that exceeds actual costs and doesn't return the difference

So, are reimbursed expenses considered income? Only when they fall under a non-accountable plan.

In past years, employees could claim unreimbursed business expenses as deductions on their income tax returns. The Tax Cuts and Jobs Act (TCJA) of 2017 eliminated these deductions until 2025, and HR1 permanently eliminated them.

How to create an expense reimbursement policy

A written expense reimbursement policy protects both you and your employees by setting clear expectations for company reimbursement. A good policy reduces disputes, ensures consistency, and keeps you compliant with tax regulations.

1. Define eligible expense categories

Your policy should list which specific job-related expenses you'll reimburse. Being specific is key as vague policies create confusion and open the door to potential fraud. Include examples of common expenses such as travel, meals, supplies, and professional development so employees know exactly what qualifies.

2. Set spending limits and reimbursement caps

Establish per-expense limits (e.g., a $75 meal cap) and category limits (e.g., a monthly travel budget). This helps you control costs while still giving employees the flexibility they need to do their jobs. Make sure limits are realistic for your industry and the markets your employees operate in.

3. Establish documentation and submission requirements

Specify what proof of purchase you require—receipts, invoices, credit card statements, or a combination. Define the format for submitting expense reports and any required details, such as business purpose descriptions. The clearer your requirements, the fewer incomplete submissions you'll deal with.

4. Create approval workflows

Define who's responsible for approving expenses at different amounts or in different categories. A $25 office supply purchase might only need a manager's sign-off, while a $2,000 conference registration might require VP-level approval. Clarify escalation paths for exceptions or disputed expenses so nothing gets stuck in limbo.

5. Determine reimbursement timelines

State clearly how quickly employees can expect reimbursement of expenses after their report is approved. Most companies aim for a 1–2-week turnaround. Meeting these deadlines is essential for maintaining employee trust. Nobody wants to float the company's costs for weeks on end.

What are the benefits of an employee reimbursement policy?

A solid reimbursement policy delivers several benefits:

• It improves your ability to keep accurate records
• Good policies save your company and your employees money
• You set proper expectations with your team about how to spend company funds
• It ensures you stay compliant with tax regulations and understand deductions
• You gain better visibility into your budget and spend management

Common challenges with expense reimbursements

Even with strong policies in place, you'll likely face recurring issues when reimbursing employees. According to Center, nearly 40% of finance leaders say the time spent on tasks like filling out reports and collecting receipts is their top challenge.¹ These are some of the main pain points finance teams encounter.

Delayed reimbursement payments

Delays are often caused by manual processing, approval bottlenecks, or incomplete submissions from employees. When employees cover an expense with their own money, they're essentially fronting your cost of doing business. If there are delays in reimbursing them, they could become frustrated or even fall into debt while waiting for funds.

Missing receipts and documentation gaps

Lost receipts are one of the most common headaches in expense management. Without proper documentation, you can't verify the expense, maintain an audit trail, or claim tax deductions. Your policy should address how to handle these exceptions and include measures, such as mobile receipt capture, to prevent future gaps.

Unclear policies and employee disputes

Conflicts often arise from ambiguous or overly complex expense guidelines. If employees don't understand what's reimbursable, they'll either avoid making necessary purchases or submit claims that get denied, both of which hurt morale. Clear communication and easy-to-access policy documents are the best way to prevent most disputes.

Expense fraud and compliance risks

You need to watch for common expense fraud scenarios: inflated expenses, personal purchases submitted as business expenses, and duplicate submissions. Maintaining outdated or inconsistently enforced policies makes these risks worse. A clear audit trail and regular reviews are essential for catching issues before they become costly.

Manual processing and administrative burden

Spreadsheet-based tracking creates errors, delays, and wasted time for everyone involved—your employees who compile and submit expense reports, your managers who review them, and your accounts payable team who issues payment.

It's no surprise the expense management software market is projected to grow to $13.8B by 2031², a sign businesses are rapidly moving toward automation.

Alternatives to traditional expense reimbursement

Reimbursing employees after they've already spent their own money isn't the only approach. Several alternative methods can reduce the administrative burden of expense report reimbursement.

Per diem allowances

Per diem is a fixed daily amount you allow an employee to spend, typically while traveling. Employees can use their per diem to cover everything from meals and transportation to lodging and other accommodations. Because employees receive a set amount, this method reduces the need for detailed receipt tracking, and they can often keep any unspent funds.

Cash advances

A cash advance is a lump sum given to employees before they incur expenses. Advances can be especially helpful when an employee is unable or unwilling to cover business expenses out of pocket, or when a merchant doesn't accept a company credit card. Employees are typically required to reconcile their spending and return any unused amounts.

Corporate cards

A corporate card is a credit or charge card employees can use to cover business expenses with pre-approved funds. Because employees never have to pay expenses personally, there's no reimbursement needed. This completely removes the delay between an employee paying for an expense and receiving repayment, and may even lead to discounts on certain purchases, saving your business time and money.

Why Ramp is the best solution for employee expense reimbursement

Managing reimbursements manually is slow, error-prone, and costly. Based on Ramp customer data, companies that switch to Ramp save an average of $11.94 per employee each year by reducing manual reimbursement processes, demonstrating how automation drives efficiency and measurable cost savings.³ Ramp streamlines the process with automation, policy controls, and real-time visibility, helping finance teams save time and money.

Here's how Ramp helps:

• Automated expense workflows: Receipt collection, categorization, and ACH reimbursements—all in one platform
• Built-in policy enforcement: Set granular spend limits and merchant restrictions up front to stop out-of-policy purchases
• Corporate card controls: Spend rules apply automatically, reducing the need for post-purchase reviews
• Real-time tracking: View transaction data as it happens instead of waiting for month-end reports
• Easy out-of-pocket reimbursements: Employees snap a photo of their receipt, OCR pulls in key details, and finance can approve with one click
• Actionable insights: All reimbursement data flows into a central dashboard for smarter forecasting and spend management

With all your expense data unified in Ramp, you can access powerful insights and analytics to optimize your policies and processes over time. The result is a faster, smarter, more controlled approach to employee expenses, empowering your team to focus on growth.

Want to learn more? Watch a demo video and see how businesses that choose Ramp save an average of 5% a year.

Sources:

¹ Center. Top Trends from Center’s 2023 Expense Management Survey.

² Mordor Intelligence. Corporate Card Market – Growth, Trends, and Forecasts (2025–2030).

³ Ramp internal customer usage data, 2025.