Accountable Plans for S Corporations in Montana

An accountable plan is an employer reimbursement arrangement. An employee pays or incurs a legitimate business expense, provides the required documentation to the company, and receives reimbursement. The company records the payment in the appropriate expense category instead of treating it as payroll or an owner distribution.

This can be especially useful for S corporation owners because an owner who works in the business is generally also an employee. The company and the shareholder are separate taxpayers. A business expense paid from the shareholder’s personal account does not automatically appear on the S corporation’s books or tax return. Reimbursement creates a clear transaction between the two.

The arrangement is not limited to S corporations. C corporations and other employers can also use accountable plans for employees. Sole proprietors generally claim qualifying expenses directly on their business tax schedules rather than reimbursing themselves as employees. Partners and partnership members have different considerations, so they should review their operating agreement and reimbursement procedures with a tax professional.

The main benefit is proper tax treatment. If a reimbursement meets the accountable plan rules, the business can generally deduct the underlying expense, subject to the normal limitations for that type of expense. The employee generally does not report the reimbursement as taxable compensation, and the payment is not ordinarily subject to payroll taxes.

Without a plan, an owner may simply transfer money from the business account and call it reimbursement. If there is no documentation or business connection, that payment could instead be treated as taxable wages, a shareholder distribution, a loan, or an unsupported expense. Each classification has different tax and bookkeeping consequences.

A plan can also help preserve deductions that might otherwise be difficult for an employee to claim personally. The federal treatment of unreimbursed employee expenses has changed over time and can depend on the tax year and the taxpayer’s circumstances. Direct reimbursement by the employer is often a cleaner approach than expecting the shareholder-employee to claim expenses on an individual return. Montana’s treatment may also depend on its conformity with current federal law, so confirm the rules for the applicable year.

Common reimbursable costs include business mileage, travel, lodging, business meals, professional education, licensing fees, office supplies, postage, software, and the business portion of phone or internet service. The expense must be ordinary and helpful for the business, and any special limitations that apply to the expense still apply after reimbursement.

Vehicle expenses require particularly careful records. A shareholder-employee may be reimbursed using the applicable standard mileage rate or, in some situations, documented actual expenses. A mileage log should identify the date, destination, business purpose, and miles driven. Normal commuting between home and a regular workplace is generally personal, even if the owner takes a business call during the drive. Check the current IRS mileage rate before calculating reimbursement.

Home office costs can sometimes be handled through an accountable plan when the space satisfies the applicable business-use requirements. The company may reimburse an appropriate share of eligible costs based on a reasonable calculation. However, paying the owner arbitrary monthly “rent” is not the same as reimbursing documented home office expenses and can produce different tax results. Home office arrangements should be reviewed before the company starts issuing payments.

Mixed personal and business bills need a reasonable allocation. If a phone or internet account is used for both purposes, the company should reimburse only the supportable business portion. A receipt proves that money was spent, but it does not by itself prove that the entire purchase was a business expense.

First, the expense must have a business connection. The employee must have paid or incurred the cost while performing services for the employer. Personal expenses do not become deductible merely because the company reimburses them. If a Billings business owner extends a work trip for a personal vacation, for example, the personal portion must be separated from the business portion.

Second, the employee must substantiate the expense within a reasonable period. Good substantiation usually includes the date, amount, place, and business purpose, along with receipts or other supporting records when appropriate. The company should establish a regular submission schedule rather than allowing owners and employees to reconstruct an entire year from bank statements during tax preparation.

Third, an employee must return any excess reimbursement within a reasonable period. This matters when the business provides an advance for travel, supplies, or another anticipated cost. If the employee receives more than the documented business expense and keeps the difference, the excess may need to be treated as taxable compensation.

The IRS provides timing guidance and safe-harbor concepts for substantiation and returning excess advances, but a company does not need to wait until the outer limit. A monthly reimbursement deadline is usually easier to administer and supports more accurate financial statements. Confirm the specific timing standards with your tax professional before adopting the policy.

Start with a written policy approved by the company. An S corporation should document the plan through an appropriate corporate resolution or similar company record. The policy should identify eligible employees, covered expenses, required documentation, submission deadlines, approval procedures, and the process for returning excess advances. A written plan is also useful when the owner is both the person requesting and approving reimbursement.

Create a simple expense report that employees can complete consistently. It should show the employee’s name, reimbursement period, vendor or destination, date, amount, business purpose, expense category, and total requested. Mileage should be supported by a mileage log. Receipts can be stored digitally, provided they remain legible and can be connected to the expense report.

Reimburse expenses from the business bank account after reviewing the report. Avoid using random transfers with descriptions such as “owner pay” or “miscellaneous.” The payment memo should identify the reimbursement period, and the expense report should be retained with the bookkeeping records. Keeping reimbursements separate from regular payroll makes the audit trail easier to follow.

The bookkeeping entry should place each amount in its proper expense account, such as travel, mileage, office supplies, continuing education, or telephone expense. It should not automatically go to shareholder distributions, owner draws, or wage expense. If the business owes the owner at the end of a reporting period, the books may show a reimbursement payable until the amount is paid.

One common mistake is paying a fixed monthly allowance without requiring proof of actual business expenses. A flat vehicle, phone, or home office allowance may be convenient, but an allowance that is not substantiated can become taxable compensation. If the company uses an allowance method, it should be tied to an approved calculation and reconciled to qualifying expenses.

Another mistake is trying to reimburse personal spending. Clothing that can be worn outside work, normal commuting, personal meals, family travel, and household costs without a supportable business allocation are common problem areas. Labeling a payment as a reimbursement does not control its tax treatment; the facts and records do.

Owners also get into trouble when they submit a full year of expenses after the books are closed or the tax return has been prepared. Late reimbursement requests can create questions about whether the company had a genuine plan in operation. Monthly submissions are generally easier for cash flow, bookkeeping, and year-end tax planning.

Finally, an accountable plan does not replace reasonable S corporation wages. Reimbursements are for documented business expenses, while wages compensate the shareholder for work performed. An owner should not reduce reasonable compensation by relabeling personal payments as reimbursements. Payroll, distributions, loans, and expense reimbursements should each be recorded separately.

This article is general information and is not tax, legal, or accounting advice for your specific situation. Accountable plan treatment depends on your entity type, expenses, documentation, tax year, and how the arrangement is operated in practice.

For help reviewing an existing reimbursement process or setting up an accountable plan for your Montana business, call Marlow Accounting at (406) 290-1214 or schedule a free consult. Cory Marlow is an IRS Enrolled Agent federally licensed by the U.S. Treasury.