What are the IRS rules for employee reimbursements in a construction company?

Key takeaways

• The IRS requires construction companies to maintain an accountable plan that establishes business connection, requires substantiation, and mandates timely return of excess reimbursements.
• Reimbursements that don't meet accountable plan requirements are reclassified as taxable wages, subject to income tax withholding and payroll taxes.
• Construction companies face heightened audit scrutiny due to large volumes of reimbursable expenses including fuel, materials, per diem, and mileage.
• Proper documentation must include receipts, business purpose, date, amount, and job-cost allocation for construction accounting.
• Vergo runs employee reimbursements through the same platform as card spend with AI coding that proposes job-cost allocation by inference from your accounting structure, and employees submit everything by text message with no app to download.

What qualifies as an accountable plan?

An accountable plan is a reimbursement arrangement that meets three IRS requirements: expenses must have a business connection, employees must substantiate expenses with adequate documentation within a reasonable period, and employees must return any excess reimbursement within a reasonable time. The IRS generally considers 60 days reasonable for substantiation and 120 days reasonable for returning excess amounts. If any requirement is not met, all reimbursements under the plan are treated as paid under a nonaccountable plan and become taxable wages subject to withholding. Construction companies must document the business purpose of each expense, which typically includes the job number, cost code, and reason for the expenditure. Vergo proposes the job-cost coding by inference from your accounting structure and history, so new vendors are coded on first sight with no rule library to build.

What documentation does the IRS require?

The IRS requires adequate records that substantiate the amount, time, place, and business purpose of each expense. For construction reimbursements, this means receipts showing the vendor, date, and amount paid, along with a description of what was purchased and why it was necessary for the job. Mileage reimbursements require a log showing date, destination, business purpose, and miles driven. Meal and lodging expenses during travel require receipts plus documentation of the business reason for the trip. Construction companies should also capture job-cost allocation at the time of the expense—the project number, cost code, and cost type—so reimbursements flow correctly into job costing and general ledger accounts without requiring later research or correction. Vergo employees submit reimbursements by text message with receipts, and Vergo chases missing receipts automatically instead of waiting for employees to file reports.

Risks of non-compliance

Construction companies that fail to maintain proper accountable plans face tax reclassification of reimbursements as taxable income, triggering penalties, back taxes, and payroll tax obligations including FICA and unemployment taxes. Inadequate documentation can result in expenses being disallowed as business deductions, increasing the company's taxable income. Lien exposure increases when reimbursements are not properly documented as part of cost of goods sold, potentially affecting bonding capacity and project financing. Work-in-progress reporting becomes distorted when reimbursements are not tracked accurately by job, leading to incorrect profitability analysis and poor project decisions. Audit findings and penalties compound when documentation is missing or policies are inconsistently applied. Damaged employee trust and morale result from inconsistent reimbursement practices, especially when field employees advance their own funds and experience delays or denials. Vergo maintains a clear audit trail from initial expense through reimbursement payment and accounting system entry, with every coding showing why it was chosen so a reviewer confirms in seconds.

A practical example

A construction superintendent purchases concrete anchors and safety equipment at a local supplier for an urgent foundation repair. Under an accountable plan, the superintendent must document the purchase with a receipt showing the vendor, date, and itemized amounts. The expense report must include the job number for the foundation project, the cost code for materials or safety equipment, and a brief business purpose such as "emergency anchor replacement per RFI 47." The company reimburses the superintendent within 30 days of submission. If the superintendent received a $500 advance but only spent $425, the remaining $75 must be returned within 120 days. This complete documentation satisfies IRS requirements, allows the expense to be reimbursed tax-free, and ensures accurate job-cost reporting for the foundation project.

Best practices for construction reimbursements

Establish a formal written accountable plan policy that meets all three IRS requirements and communicate it to all employees. Require employees to submit expense reports with detailed receipts and business purpose within 60 days of the expense. Integrate job-cost allocation into the reimbursement workflow so every expense is coded to project, cost code, and cost type at the time of submission rather than during month-end close. Conduct periodic audits of reimbursement practices to identify missing documentation, late submissions, or unreturned advances. Train field employees and project managers on policy requirements and proper documentation standards. Maintain a clear audit trail from initial expense through reimbursement payment and accounting system entry, especially for expenses that cross accounting periods or affect work-in-progress calculations.

How Vergo handles this

Vergo runs employee reimbursements through the same platform as card spend and AP invoices, with one coding model for everything. Employees submit reimbursements by text message with no app to download or portal to log into, and Vergo chases missing receipts automatically instead of waiting for employees to file reports. Vergo proposes the job-cost coding by inference from your accounting structure and history—new vendors are coded on first sight with no rule library to build. Every coding shows why it was chosen so a reviewer confirms in seconds instead of re-coding by hand. Approval workflows are optional and fit how you already control spend: route by GL account, by amount, or by project, or skip approval flows entirely and let policy flags catch only what breaks a rule. Transactions are ready to code the moment they happen with no waiting for clearing, and once they clear they sync into your accounting or ERP software. Card spend, employee reimbursements, and AP invoices run through one coding model—same coding, same review, one reconciliation—while payment stays on the rails you already use.

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