Reimbursement is the repayment of money someone has spent on behalf of an employer, insurer, government, or other party. Common examples are business travel expenses repaid by an employer, medical bills repaid by an insurer, tax overpayments refunded by government, and money paid to an ex‑spouse by court order to compensate for money or time invested (reimbursement alimony). When handled under the right rules, many reimbursements are not taxable income to the recipient; however, documentation and the reimbursement arrangement determine tax treatment.
Key takeaways
– Reimbursement repays out‑of‑pocket expenses (travel, medical, tuition, etc.) or returns overpaid taxes.
– Employer reimbursements that meet IRS “accountable plan” rules are generally not taxable.
– Insurers and governments often require claims, receipts, and deadlines; procedures vary by plan and state.
– Use GSA per diem, IRS standard mileage rate, or company policy to calculate travel reimbursements.
– Keep clear records and receipts; failure to substantiate expenses risks denial or taxable treatment.
Understanding reimbursement
Reimbursement can occur in many contexts:
– Business: employers repay employees for approved business costs (hotels, meals, mileage, client entertainment, tuition). Companies often set policies (per diem or actual receipts) and approval workflows.
– Insurance: policyholders may pay out‑of‑pocket and submit claims for covered services or be reimbursed after meeting deductibles or preauthorization rules.
– Taxes: taxpayers who overpay through withholding or estimated taxes receive refunds (a form of reimbursement).
– Legal: courts may order reimbursement payments (e.g., reimbursement alimony) in divorce or restitution in other contexts.
Tip
Before you pay expenses expecting reimbursement: confirm the payer’s policy (what’s covered), the documentation needed (receipts, mileage logs), submission deadlines, and whether reimbursement will be tax‑free or reported as wages.
Types of reimbursement and how they work
– Per diem: a fixed daily amount to cover lodging, meals and incidental expenses. Employers can use GSA per diem rates or set their own.
– Actual expense reimbursement: employee submits receipts and is reimbursed the actual amount.
– Mileage reimbursement: paid per mile driven for business use of personal vehicle—commonly tied to the IRS standard mileage rate.
– Insurance claim reimbursement: insurer repays covered costs after a claim is filed and processed; may require an Explanation of Benefits (EOB).
– Tax refund: government repays overpaid taxes after filing and processing a tax return.
– Legal reimbursement (e.g., reimbursement alimony): court‑ordered payments based on specific legal findings.
Insurance reimbursement: practical steps
1. Confirm coverage: read your policy or call your insurer to confirm whether the service or expense is covered.
2. Pay and collect documentation: keep itemized invoices, receipts, and provider information.
3. File a claim: use the insurer’s portal, mail, or the provider (which may file on your behalf). Include receipts and any required forms.
4. Track the claim: keep claim numbers and follow up if processing takes longer than advertised.
5. Appeal if denied: request the reason for denial, gather supporting records, and follow the insurer’s appeal process.
Taxes and reimbursement: key rules
– Accountable vs. nonaccountable plans: employer reimbursements under an IRS “accountable plan” (employee has to substantiate expenses and return excess payments) are not taxable to the employee; nonaccountable reimbursements are taxable wages. See IRS guidance on accountable plans.
– Self‑employed: you can deduct business expenses on Schedule C or otherwise, and may “reimburse” yourself from business income, but the tax effect comes from the business deduction rather than a separate nontaxable reimbursement.
– Recordkeeping: keep receipts, mileage logs, and supporting documentation in case of audit. The IRS provides guidance on deductible travel and transportation expenses.
Legal reimbursement (reimbursement alimony)
– Some divorce settlements include reimbursement alimony: payment to a former spouse who invested time and money in the other spouse’s education or licensure. These payments are governed by state law and court orders and may require clear documentation of contributions and intent.
Requirements for reimbursement (typical employer or insurer rules)
– Preapproval for certain expenses (e.g., travel, training).
– Itemized receipts and original documentation.
– Timely submission (employer policy or insurer deadlines).
– Substantiation (date, amount, business purpose, attendees for meals/entertainment).
– Returning excess advances (if you received an advance greater than expenses).
– For mileage: odometer readings, dates, business purpose, and starting/ending locations.
Special considerations
– Fraud controls: organizations verify receipts and may audit expense reports to prevent inflated or fictitious claims.
– Identity theft and bank fraud: banks investigate before reimbursing unauthorized withdrawals; reimbursement depends on the findings and applicable rules.
– Tax treatment: reimbursements that fail substantiation or are paid under nonaccountable arrangements are generally taxable. Consult a tax advisor for complex situations.
– HSA rules: reimbursements from Health Savings Accounts are tax‑free if for qualified medical expenses incurred after the HSA was established; you must keep records (see IRS Publication 969).
– Medicare/Medicaid: program rules differ—Medicaid is state‑administered and varies by state; Medicare has specific claim procedures and documentation requirements.
Example: how an employee expense reimbursement works (practical)
Scenario: You attend an approved conference and pay $300 hotel, $250 ground transport, $100 food = $650 total.
Practical steps:
1. Before travel: obtain approval per company policy and note any per diem limits.
2. During travel: save itemized receipts and keep a mileage log if driving.
3. After travel: complete the company expense form or portal, attach receipts, and indicate business purpose and dates.
4. Submit: send to manager for approval within the required timeframe.
5. Receive reimbursement: approved amount is reimbursed via payroll or accounts payable (if under an accountable plan, it is typically non‑taxable).
How much should I be reimbursed for mileage?
– Employers commonly use the IRS standard mileage rate, which is updated annually. Check the current rate on the IRS website before calculating reimbursement. Companies may instead use a fixed per‑mile rate or cover actual costs; some use GSA or company‑specific rates for government contractors or travelers. Example approach: miles driven × IRS standard mileage rate = reimbursement amount (then document mileage with a log).
How do I get reimbursed from Medicaid?
– Medicaid is administered by each U.S. state, so procedures vary. Steps: confirm Medicaid eligibility and what providers accept Medicaid; provide your Medicaid information to the provider; obtain itemized bills or receipts; if you paid out‑of‑pocket for a covered service, ask the provider or state Medicaid office about filing a claim for reimbursement. Check your state’s Medicaid website or contact the state Medicaid office for the exact process.
How do I get reimbursed from my HSA?
– Confirm the expense is a qualifying medical expense and that it was incurred after the HSA was established. Keep the receipt showing date, amount, and service. Withdraw funds electronically, by check, or using an HSA debit card and transfer to yourself for the amount paid. Keep documentation to prove the expense was qualified in case of audit. See IRS Publication 969 for rules.
How do I get reimbursed from Medicare?
– Providers typically submit claims directly to Medicare. If you paid out‑of‑pocket for services that Medicare covers, ask the provider to submit the claim. If you need to file yourself, use the Medicare instructions for filing claims (Medicare.gov explains how to file a claim and where to send forms). Keep itemized bills and the Medicare Summary Notice (MSN) or Explanation of Benefits (EOB).
Practical checklist for getting reimbursed (employees, patients, taxpayers)
1. Confirm coverage/approval before incurring the expense.
2. Use company or insurer portals if available — they speed processing.
3. Collect original, itemized receipts and retain copies. For mileage, keep a contemporaneous log (date, miles, purpose, start/end points).
4. Complete required forms fully and include business purpose.
5. Submit claims within the stated deadlines.
6. Follow up, retain claim numbers, and save all correspondence.
7. If denied, request reason and appeal with supporting documents.
Common documentation to save
– Itemized receipts or invoices (with merchant and amount)
– Credit card or bank statements (supporting proof)
– Mileage log or auto odometer readings
– Preapproval emails or travel authorization forms
– Proof of medical necessity (for HSA/insurance reimbursements)
– Court orders (for legal reimbursements)
Sources and further reading
– Investopedia — Reimbursement (Jake Shi).
– Internal Revenue Service — Standard Mileage Rates.
– Internal Revenue Service — Publication 463 (Travel, Gift, and Car Expenses).
– Internal Revenue Service — Publication 969 (Health Savings Accounts and Other Tax-Favored Health Plans).
– Internal Revenue Service — Employer’s Tax Guide (Publication 15 / Circular E).
– U.S. General Services Administration — Per Diem Rates.
– Medicaid (Centers for Medicare & Medicaid Services) — State Medicaid info. /
– Medicare — How to file a claim.
Editor’s note: The following topics are reserved for upcoming updates and will be expanded with detailed examples and datasets.