How to Reimburse Yourself for Business Expenses

Paying yourself back for a business cost you fronted personally is straightforward once you know your entity type, because that is what determines the mechanics. If you run a sole proprietorship or a single-member LLC, you don’t reimburse yourself in any formal sense; you deduct the expense on Schedule C and move money from the business account to your personal account to square the books. If your business is an S-Corp, a C-Corp, or an LLC taxed as a corporation, you reimburse yourself through a written accountable plan so the payment stays off your W-2. In every case, the expense has to qualify as ordinary and necessary under federal tax law, and you need documentation that will hold up in an audit. That is the whole framework for how to reimburse yourself for business expenses.

Sole Proprietors and Single-Member LLCs

When the IRS treats you and your business as the same taxpayer, there is no separate entity to cut you a reimbursement check. You simply deduct qualifying business costs on Schedule C of your Form 1040.¹ If you bought printer ink with your personal debit card, that cost goes on Schedule C the same as any other expense.

You should still transfer money from the business account to your personal account to cover what you spent. It isn’t a reimbursement for tax purposes, but it keeps your books clean and your accounts balanced. The deduction happens on Schedule C either way.

S-Corps, C-Corps, and LLCs Taxed as Corporations

When your business is a separate tax entity, the reimbursement mechanism matters a great deal. A corporation can repay an owner-employee’s out-of-pocket business costs completely tax-free, but only under an accountable plan that meets IRS requirements. Without one, the payment gets added to your W-2 as taxable wages, and both you and the company owe payroll taxes on it.²

For S-Corp shareholders specifically, an accountable plan is the only IRS-approved way to be repaid for costs like the business use of a home office. Without one, you lose that deduction on both the personal and corporate side.

The Three Requirements

An accountable plan doesn’t have to be elaborate, but it does need to satisfy three tests under federal regulations.³

Business connection. Every reimbursed expense has to relate directly to services you performed for the company. Toner for the office printer qualifies. Groceries do not.
Adequate substantiation. You document each expense with receipts and a written business purpose, then submit that documentation to the company within a reasonable time.
Return of excess amounts. If the company advances you more than you actually spend, you return the difference. You cannot keep the surplus.

The IRS provides safe-harbor deadlines that automatically satisfy the “reasonable time” standard: advances made within 30 days of the expense, substantiation within 60 days, and return of any excess within 120 days.³ Year-end catch-up reimbursements, where twelve months of receipts arrive in December, are a common audit flag.

If any of the three requirements fails, the whole payment falls under non-accountable plan rules. The company reports it as wages, withholds income tax, and pays the employer share of Social Security and Medicare. You owe the employee side too.²

Setting It Up

Put the plan in writing. Spell out which expense categories are covered, how you’ll substantiate them, the submission deadlines, and how excess reimbursements get returned. Even if you’re the only employee, generate a monthly expense report and pay the reimbursement as a separate transaction from payroll and any distributions.

A Note on Partnerships

Partners generally handle out-of-pocket costs differently: qualifying unreimbursed partnership expenses go on Schedule E of the partner’s personal return, and the partnership agreement should identify which costs the partnership itself covers versus which fall on individual partners. Unreimbursed partnership expenses also affect the self-employment tax calculation.

What Qualifies as a Business Expense

Federal tax law requires every business expense to be both ordinary and necessary before it can be deducted or reimbursed.⁴ Ordinary means common in your industry. Necessary means helpful and appropriate for what you do; the expense doesn’t have to be indispensable.

Categories that typically qualify:

Travel away from your tax home for longer than a normal workday, including airfare, hotels, rental cars, and meals.⁵
Equipment used in the business, such as laptops, printers, and software.
Business meals with clients or prospects where business is discussed, deductible at 50% of the cost.⁶
Office supplies like paper, ink, and postage.
Vehicle costs for business driving, excluding your daily commute.

The regulations also allow deductions for management fees, insurance covering business risks, rent for business property, and advertising.⁷ The cost must connect to your trade or business, not your personal life.

What Does Not Qualify

A few categories trip owners up repeatedly. Reimbursing yourself for these creates tax problems quickly.

Entertainment. Since 2018, no deduction is allowed for entertainment, amusement, or recreation.⁸ A client at a football game or concert is not deductible even if you talk business the whole time. Restaurant meals are still 50% deductible, but if a cost could be either a gift or entertainment, the IRS treats it as entertainment.

Commuting. Driving between home and your regular workplace is personal, no matter the distance.⁶ Travel between two work locations during the day, or to a temporary job site, generally does qualify.

Personal clothing. Everyday business attire is not deductible even if you only wear it to work. Clothing qualifies only if it’s required for the job and not suitable for ordinary wear, such as a hard hat or a branded uniform.

Fines and government penalties. Fines paid for violating a law aren’t deductible. A parking ticket on a business trip is on you personally.

Mileage and Per Diem Shortcuts

Two IRS-published rates let you skip tracking every gas receipt or restaurant bill.

Standard Mileage Rate

For the 2026 tax year, the IRS standard mileage rate for business driving is 72.5 cents per mile.⁹ The rate covers gas, insurance, depreciation, and maintenance for cars, vans, pickups, and panel trucks, including electric and hybrid vehicles. If you choose this method for a vehicle you own, you must elect it in the first year the vehicle is available for business use; you can’t switch to the standard rate after claiming actual expenses in year one.

Your mileage log needs the date, destination, business purpose, and odometer readings at the start and end of each trip.⁶ A GPS-based phone app handles the logging, but you still note the business reason for each trip.

Per Diem Rates

Instead of collecting individual meal and hotel receipts, the company can reimburse at the federal per diem rate. For the period beginning October 1, 2025, the IRS high-low method allows $319 per day for high-cost cities like New York, San Francisco, and Washington, D.C., and $225 per day everywhere else in the continental United States.¹⁰ Of those totals, $86 per day in high-cost areas and $74 per day elsewhere covers meals and incidental expenses.

Per diem reimbursements at or below these rates satisfy the substantiation requirement automatically under an accountable plan. You still document the dates, locations, and business purpose of the travel. Anything paid above the per diem rate is taxable.

Reimbursing Home Office Costs

If you work from a dedicated space in your home, the rules split by entity type.

Sole proprietors and single-member LLC owners claim the home office deduction directly on their tax return. The simplified method allows $5 per square foot of dedicated office space, up to 300 square feet, for a $1,500 maximum.¹¹ The regular method calculates actual costs like rent, utilities, and insurance based on the business-use percentage of your home, and can produce a larger deduction if your costs are high.

S-Corp owner-employees are in a different position. You cannot take the home office deduction on your personal return or on the corporate return. The only path is the company’s accountable plan: the S-Corp reimburses you for the business-use portion of your home expenses, deducts the payment as a business expense, and the money stays off your W-2. Without an accountable plan, this deduction is simply lost.

Documentation and Recordkeeping

Records are what separate a clean reimbursement from a disallowed one. The IRS expects four items for every expense: the amount, the date, the place, and the business purpose. For meals, add who attended and what was discussed.⁶

Formal receipts are required for any expense of $75 or more and for all lodging costs regardless of amount.¹² For smaller amounts, a contemporaneous log is technically enough, but keeping every receipt is the safer practice. Remembering the business purpose of a $40 charge three months later is harder than it sounds.

Digital Storage

The IRS accepts digital copies of receipts if the electronic system meets certain standards. Scanned images must be legible and reproducible as hard copies, the system must prevent unauthorized changes, and you must be able to cross-reference electronic records back to entries in the general ledger.¹³ Most modern accounting platforms with receipt-scanning built in satisfy these standards.

How Long to Keep Records

The baseline retention period is three years from the date you file the return claiming the deduction.¹⁴ That extends to six years if you underreport gross income by more than 25%, and there is no limit at all for fraudulent returns or unfiled returns.¹⁵ Employment tax records should be kept at least four years after the tax is due or paid, whichever is later. Given the cost of digital storage, seven years is a reasonable default.

Processing the Payment

Once the expense report is approved and receipts verified, transfer the money to your personal account by business check or electronic transfer. Keep the payment entirely separate from your salary, owner’s draw, or any distributions. Bundling reimbursements into payroll is the fastest way to convert a tax-free repayment into taxable wages.

On the company’s books, the reimbursement hits the relevant expense account (office supplies, travel, and so on) rather than an equity or payroll account. That separation matters at tax time, and it also demonstrates that the company operates as a genuinely separate financial entity from you. When personal and business funds are mixed, creditors can argue the entity is an alter ego and reach personal assets through the corporate shield.

What Happens If You Get It Wrong

Skipping the accountable plan or ignoring the documentation rules is more expensive than doing it right.

Reimbursements that fail the accountable plan tests count as taxable compensation. The company reports them on your W-2, withholds federal income tax, and pays the employer’s share of Social Security (6.2%) and Medicare (1.45%). You owe the employee share too. On a five-figure reimbursement that should have been tax-free, the payroll tax alone is substantial, before any income tax.

On top of that, the IRS can impose a 20% accuracy-related penalty on any underpayment resulting from negligence or disregard of the rules.¹⁶ If an audit finds unsubstantiated reimbursements that led to an underpayment, that penalty stacks on the tax owed plus interest. A clean written plan, monthly expense reports, and receipts stored where you can find them make all of that a non-issue.

1
Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040)
2
Office of the Law Revision Counsel. 26 USC 62 – Adjusted Gross Income Defined
3
eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements
4
Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
5
Internal Revenue Service. Topic No. 511, Business Travel Expenses
6
Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
7
eCFR. 26 CFR 1.162-1 – Business Expenses
8
Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment Etc Expenses
9
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents
10
Internal Revenue Service. 2025-2026 Special Per Diem Rates
11
Internal Revenue Service. Simplified Option for Home Office Deduction
12
Internal Revenue Service. Rev. Rul. 2003-106
13
Internal Revenue Service. Revenue Procedure 97-22
14
Internal Revenue Service. How Long Should I Keep Records
15
Internal Revenue Service. Publication 583, Starting a Business and Keeping Records
16
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments