Expense Reimbursement Policy: What To Put In Writing Before Work Starts

For US startups and small businesses, questions about work-related expenses often arise before the first day of work. Who pays for travel? Are home office costs covered? What about meals, supplies, or client entertainment? Without a clear, written expense reimbursement policy, these questions can lead to confusion, disputes, and even legal trouble. Many founders and operators mistakenly assume that reimbursement is optional, or that a handshake agreement is enough. Others copy a policy from another business, not realizing that state laws or worker classification rules may require something different. This guide explains why having a tailored expense reimbursement policy is critical, what to include, and how to avoid common mistakes that can cost your business time and money.

We will break down the federal baseline, highlight state law differences, and show you how to address both employees and independent contractors. You will find practical examples, checklists, and answers to the most common questions US startups face when setting up or updating their expense reimbursement policies. By the end, you will know what to put in writing before work starts, and how to keep your policy up to date as your business grows.

What Is An Expense Reimbursement Policy?

An expense reimbursement policy is a written document that explains when and how your business will pay back employees or contractors for work-related expenses. These expenses can include:

• Travel (airfare, hotels, rental cars, taxis, mileage)
• Meals and entertainment related to business
• Office supplies and equipment
• Home office costs (internet, phone, utilities, furniture)
• Professional development (training, certifications, conferences)
• Uniforms or tools required for the job

A good policy will answer these questions:

• Which expenses are eligible for reimbursement?
• What documentation is required (receipts, mileage logs, invoices)?
• How and when should expenses be submitted?
• Who approves expenses, and what are the spending limits?
• How quickly will reimbursements be paid?
• Are there any exclusions or special rules?

For example, a startup might allow reimbursement for economy airfare and standard hotel rooms, but not for first-class tickets or luxury hotels. Or, your policy might cover home office supplies up to a certain dollar amount per month, with pre-approval required for larger purchases. Without these details in writing, you risk inconsistent decisions, unhappy workers, and possible legal violations.

Including your expense reimbursement policy in your employee handbook, onboarding materials, or contractor agreement helps set clear expectations from day one.

Federal Requirements For Expense Reimbursement

Many founders are surprised to learn that there is no single federal law requiring reimbursement for all work expenses. However, several federal rules make reimbursement mandatory in specific situations. Here are the key federal requirements:

• Fair Labor Standards Act (FLSA): Under the FLSA, employers must pay employees at least the federal minimum wage. If an employee pays for work-related expenses and is not reimbursed, and this causes their pay to fall below minimum wage, the employer may be in violation of federal law. For example, if you pay a non-exempt employee $7.25 per hour (the federal minimum wage) and require them to use their own car for work without reimbursing mileage, you could be underpaying them.
• IRS Accountable Plan Rules: The Internal Revenue Service (IRS) distinguishes between accountable and non-accountable reimbursement plans. Under an accountable plan, employees must submit proof of expenses and return any excess reimbursement. Proper documentation is required, and reimbursements are not treated as taxable income. If your policy does not meet these requirements, reimbursements may be considered taxable wages, increasing your tax burden and complicating payroll.
• Industry-Specific Federal Rules: Some industries, such as government contracting, healthcare, and transportation, have federal rules or contract requirements that mandate reimbursement for certain expenses. Always check if your business is subject to these rules.

In summary, while federal law does not require reimbursement for every expense, it does require that employees are not left earning less than minimum wage after work expenses. For tax purposes, your policy should require timely and documented submissions. Failing to follow IRS rules can result in tax penalties for both your business and your workers.

Practical Example: Suppose you hire a field technician at $8.00 per hour, and they spend $100 per week on gas for work travel. If you do not reimburse these expenses, their effective pay could fall below minimum wage, violating the FLSA. A written policy that covers mileage reimbursement at the IRS standard rate (updated annually) helps you avoid this risk.

State Law Variations And Common Traps

State laws can be stricter than federal law when it comes to expense reimbursement. Some states require employers to reimburse all necessary work-related expenses, regardless of whether minimum wage is affected. Others have specific rules for certain types of expenses, such as uniforms, tools, or remote work costs. Here are some examples and common traps:

• California: Labor Code Section 2802 requires employers to reimburse employees for "all necessary expenditures or losses incurred by the employee in direct consequence of the discharge of his or her duties." This covers a wide range of expenses, from cell phone use to home internet for remote work. Failure to reimburse can result in penalties, interest, and even attorney fees.
• Illinois: The Illinois Wage Payment and Collection Act requires reimbursement for "necessary expenditures" within 30 days of submission, unless the employer has a written policy specifying otherwise. If you do not have a clear policy, you may be required to reimburse more than you intended.
• Massachusetts: Employers must reimburse for certain uniforms and tools required for the job, and cannot deduct these costs from pay if it would reduce wages below minimum wage.
• New York: While New York does not have a general reimbursement statute, courts have sometimes required reimbursement for expenses that are a necessary part of the job, especially if not reimbursing would violate minimum wage laws.
• Other States: States like Montana, Iowa, and the District of Columbia have their own rules requiring reimbursement for certain expenses or prohibiting deductions from pay for work-related costs.

Common Mistakes:

• Using a one-size-fits-all policy for workers in different states
• Failing to update the policy when hiring remote workers in new states
• Not specifying which expenses require pre-approval
• Not setting deadlines for submitting expenses, leading to late or disputed claims
• Assuming that all expenses are optional or negotiable, when state law may require reimbursement

Checklist: State Law Compliance

• Identify every state where you have employees or contractors
• Check state labor agency websites or consult a legal professional for specific reimbursement rules
• Update your policy to address state-specific requirements (such as deadlines, covered expenses, or required documentation)
• Train managers and HR staff on state law differences

Example: A startup based in Texas hires its first employee in California. The company's old policy only covers travel and meals, but California law requires reimbursement for cell phone and internet used for work. The company updates its policy to include these expenses for California workers, avoiding potential penalties.

Employees vs. Contractors: Who Gets Reimbursed?

Whether you are hiring employees or independent contractors, your expense reimbursement obligations and best practices will differ. Understanding these differences is essential to avoid misclassification risks and disputes.

Employees: Employees are protected by federal and state wage laws. If you require employees to pay for work-related expenses, you may be required to reimburse them, especially if failure to do so would reduce their pay below minimum wage or violate state law. Some states, like California and Illinois, require reimbursement for all necessary expenses, regardless of pay level.

Independent Contractors: Contractors are generally responsible for their own business expenses unless your contract states otherwise. However, if you require a contractor to incur specific expenses or control how and when they work, you may risk misclassifying them as contractors instead of employees. The IRS and Department of Labor use multiple factors to determine worker classification, including:

• Who controls the work schedule and methods
• Who provides tools and equipment
• Whether expenses are reimbursed

If you reimburse a contractor for most or all work expenses, or require them to follow strict procedures, you may inadvertently create an employer-employee relationship. This can lead to tax penalties and wage claims.

Best Practices For Contractors:

• Clearly state in the contract which expenses (if any) will be reimbursed
• Allow contractors to set their own rates and manage their own expenses where possible
• Review IRS and Department of Labor guidance on worker classification before finalizing contracts
• Do not require contractors to seek pre-approval for every expense unless absolutely necessary

Example: A startup hires a freelance graphic designer. The contract states that the designer is responsible for their own software and equipment, but the company will reimburse for travel to a specific event. This is clearly documented in the contract to avoid confusion.

Common Mistake: Treating contractors like employees by requiring them to use company tools, follow a set schedule, and submit every expense for approval. This increases the risk of misclassification and potential legal claims.

What To Include In Your Expense Reimbursement Policy

To draft a clear and effective expense reimbursement policy, include the following elements:

• Scope: Specify who is covered (employees, contractors, interns, etc.) and whether different rules apply to different groups.
• Eligible Expenses: List the types of expenses that are reimbursable, such as travel, lodging, meals, office supplies, mileage, cell phone use, and home office costs. Be specific about what is and is not covered.
• Approval Process: State who must approve expenses, whether pre-approval is required, and the process for requesting approval. For example, require pre-approval for travel or purchases over a certain amount.
• Submission Requirements: Explain what documentation is needed (original receipts, mileage logs, invoices) and the deadline for submitting expenses (e.g., within 30 days of the expense).
• Payment Timeline: State how quickly reimbursements will be processed and paid (e.g., within 15 business days of approval).
• Exclusions: List expenses that are not covered, such as alcohol, personal travel, upgrades, or expenses incurred without approval.
• Tax Treatment: Explain that reimbursements will be handled according to IRS accountable plan rules, and that late or excess reimbursements may be treated as taxable income.
• State Law Compliance: Include a statement that the policy will be interpreted in accordance with applicable state and federal laws, and may be updated as needed.

Sample Policy Language:

"The Company will reimburse eligible employees and contractors for reasonable and necessary expenses incurred in the course of performing their duties, subject to pre-approval and submission of appropriate documentation. All expense reports must be submitted within 30 days of the expense. The Company reserves the right to deny reimbursement for expenses not in compliance with this policy or applicable law."

Checklist For Drafting Or Reviewing Your Policy:

• Have you listed all common expense categories relevant to your business?
• Is the approval and submission process clear and accessible?
• Are deadlines and documentation requirements spelled out?
• Does the policy address remote work or home office expenses if applicable?
• Have you checked for state-specific requirements?
• Is the policy included in onboarding materials or contractor agreements?
• Do you have a process for updating the policy as laws or business needs change?

Example: A software startup allows remote employees to claim up to $50 per month for home internet, with a copy of the monthly bill required. Travel expenses require manager pre-approval. The policy is reviewed annually and updated if the company hires in new states.

Practical Tips And Common Mistakes For Startups

Setting up an expense reimbursement policy can feel overwhelming, especially for early-stage startups. Here are practical tips and pitfalls to avoid:

• Start With The Basics: Cover the most common expenses first (travel, meals, supplies). Expand as your business grows or as new needs arise.
• Customize For Your Team: If you have remote workers, include home office expenses. If you are in a regulated industry, check for special requirements.
• Use Technology: Expense management software or apps can streamline submissions, approvals, and recordkeeping. Even a simple shared spreadsheet is better than nothing for tracking expenses.
• Communicate Clearly: Train your team on the policy, and make sure everyone knows how to submit expenses and what is required. Include the policy in onboarding and review it regularly.
• Monitor And Update: Review expense reports for unusual or excessive spending. Update your policy as your business grows, as you hire in new states, or as laws change.
• Document Everything: Keep copies of all expense submissions, approvals, and payments for at least three to seven years, in line with IRS audit guidelines.

Common Founder Or Operator Moments:

• Hiring your first remote employee in a new state and realizing your policy does not cover required home office expenses
• Discovering a contractor expects reimbursement for travel, but your contract is silent on the issue
• Getting an IRS audit notice because reimbursements were not properly documented
• Dealing with a dispute over a large, unapproved expense submitted months after the fact
• Facing penalties because your policy did not comply with California or Illinois law

Checklist: Avoiding Common Mistakes

• Do not copy another company's policy without checking state law
• Do not rely on verbal agreements for expense reimbursement
• Do not ignore remote work expenses, especially if required by state law
• Do not delay updating your policy as your team grows or laws change
• Do not assume contractors never need reimbursement, always clarify in writing

Next Steps:

• Draft or update your written expense reimbursement policy
• Review state laws for every location where you have workers
• Train your team and include the policy in onboarding
• Set up a system for tracking, approving, and paying reimbursements
• Consult a legal professional if you have questions about complex situations or state law differences

FAQs

Do I have to reimburse employees for every work expense?

No, not every expense must be reimbursed under federal law. However, you must reimburse if not doing so would reduce an employee's pay below minimum wage. Some states, like California and Illinois, require reimbursement for all necessary work expenses. Your policy and local laws will determine what is required.

What documentation should I require for expense reimbursement?

Best practice is to require original receipts, mileage logs, or other proof of expense. This supports IRS requirements and helps prevent fraud or disputes. Your policy should specify what is needed for each type of expense, and you should keep records for at least three to seven years.

Can I set limits or require pre-approval for expenses?

Yes. Most businesses set spending limits and require pre-approval for certain expenses, such as travel or large purchases. Make sure these rules are clearly stated in your policy and communicated to your team. In some states, limits must be reasonable and cannot be used to avoid reimbursement obligations required by law.

How long do I have to reimburse employees after they submit expenses?

Federal law does not set a specific timeline, but many states do. For example, Illinois requires reimbursement within 30 days. California expects prompt reimbursement. Your policy should set a reasonable timeline and comply with any applicable state rules.

What happens if I do not have an expense reimbursement policy?

Without a written policy, you risk confusion, disputes, and possible legal violations, especially if employees are not properly reimbursed. You may also face tax problems if reimbursements are not properly documented. A clear policy helps manage expectations and compliance.

Key Takeaways

• Set up a written expense reimbursement policy before work starts to avoid confusion and legal risks.
• Federal law requires reimbursement in some cases, and many states have stricter rules.
• Different rules may apply to employees and independent contractors. Make sure contracts are clear.
• Include eligible expenses, documentation requirements, approval processes, and state law compliance in your policy.
• Regularly review and update your policy as your business grows or laws change.

If you need help drafting or reviewing your expense reimbursement policy, or have questions about federal and state requirements, contact our team at (888) 449-8437 or team@sprintlaw.com. Where legal services are required, they are delivered by licensed lawyers at trusted US law firms through the Sprintlaw platform.