What it means
The accounting treatment is the point most people get wrong. A reimbursement is not an expense in its own right; the underlying cost is the expense, and the payment to the employee simply settles a liability the business already owed.
Tax authorities draw a hard line between reimbursing an actual cost and paying an allowance. A reimbursement backed by receipts and a clear business purpose is generally not taxable, while a round sum allowance paid regardless of what was spent is usually treated as pay and taxed accordingly.
Most organisations run reimbursement through a written expense policy setting out caps, approved categories and evidence rules. The policy protects employees as much as it controls spending, because it tells them in advance what will be paid rather than leaving the answer to a manager's mood.
Timing matters more than finance teams often admit. An employee who fronts $2,000 of travel and waits eight weeks for repayment is effectively lending the company money, which is why corporate cards and prompt fortnightly payment runs are worth the administrative effort.
Reimbursements between businesses need care over sales tax and over gross versus net reporting. Where a supplier recharges a cost it incurred as principal, the recharge is normally part of its own revenue, but where it merely passed money through as agent, the amount is a disbursement and stays off the revenue line.
In practice
Real-world examples
Example 1
A remote employee buys an approved replacement laptop for $1,450 and claims it back with the invoice attached. The company records $1,450 of equipment cost, not $1,450 of staff cost, and capitalises it if the amount exceeds its asset threshold.
Example 2
A health plan member pays a $1,050 specialist bill and claims it back under a policy with 20% coinsurance, so the insurer reimburses 80% x $1,050 = $840 and the member bears $210. The paperwork trail matters because the plan will only pay against an itemised invoice.
Example 3
A design studio pays a printer $3,600 for a client's brochures and recharges the exact amount alongside its $18,000 design fee. Because the studio contracted with the printer in its own name, the $3,600 goes through its revenue and costs rather than being treated as a pass through.
Think of it
Reimbursement is like lending your friend money to buy cinema tickets because they had their card with you, and paying them back immediately once you get home.
Formula
Calculation
Reimbursable amount = sum of allowable expenses within policy limits + (miles driven x approved rate per mile)
A field engineer submits a claim covering a six day client visit. She drove 1,200 miles at the company rate of $0.65 per mile, which is 1,200 x $0.65 = $780, paid $1,150 for a hotel and $620 for a flight, and spent $270 on meals across the six days.
The expense policy caps meals at $40 a day, so only 6 x $40 = $240 of the meal spend is allowable and $30 falls outside the policy.
The claim as submitted totals $780 + $1,150 + $620 + $270 = $2,820, and the company reimburses $780 + $1,150 + $620 + $240 = $2,790. The engineer is told which line was reduced and why, and the $30 is not converted into a taxable payment by quietly approving it.Case study
Seen in the real world
The following is an illustrative and entirely fictional example. Torrance Field Services, an invented maintenance contractor with 60 engineers, reimbursed roughly $900 per engineer per month, which is $54,000 a month or $648,000 a year. Claims arrived as paper receipts stapled to spreadsheets, and the finance team spent about 40 minutes processing each of the 720 claims submitted annually, some 480 hours of work.
An internal review found that about 6% of the annual claims value, roughly $38,880, sat outside the written policy, mostly meals above the cap and hotel upgrades that had been waved through by busy supervisors. Worse, engineers were routinely waiting five to seven weeks for repayment, and two had left citing the cash flow strain.
The fictional company issued corporate cards to every engineer and moved claims onto a phone app with photographed receipts and policy limits built into the form. Processing time fell to about 12 minutes a claim, or 144 hours a year, saving 336 hours, and the out of policy spend dropped sharply because the app rejected it at the point of entry rather than weeks later.
Watch out
Common mistakes
- Recording the payment to the employee as the expense, which either duplicates the cost or puts it in the wrong period and the wrong account.
- Paying round sum allowances with no receipts and assuming they are tax free, when most tax authorities treat them as earnings subject to payroll tax.
- Letting claims sit unpaid for weeks, which quietly pushes the company's working capital problem onto its own staff.
Questions
People also ask
Is a reimbursement taxable income for the employee?
Not usually, provided it repays a genuine business expense that is properly evidenced and falls within the employer's policy.
What is the difference between a reimbursement and a per diem?
A reimbursement repays actual documented spending, while a per diem pays a fixed daily amount regardless of what was spent, which simplifies administration but can create a taxable element.
Should reimbursements go through payroll?
Generally no, they are better paid through accounts payable so they are clearly separated from earnings, although some systems pay them alongside salary with a distinct non taxable code.