Common Tax Mistakes Construction Companies Make

Misclassifying Workers as Employees vs. Independent Contractors

IRS reclassified 1,200 construction workers as employees in 2023, costing firms $18M in back payroll taxes per DOL data. Construction companies often make this tax mistake by treating skilled tradespeople like framers or electricians as independent contractors. This error leads to IRS audits and hefty penalties.

The IRS uses Revenue Ruling 87-41 and its 20-factor test to determine worker status. Factors fall into three categories: behavioral control, financial control, and relationship type. Misclassification triggers back taxes, interest, and average penalties around $50K per worker.

Use Form SS-8 to request an IRS determination, but expect a 6-month processing time. In the meantime, review contracts and payment records. Construction firms should train project managers on these rules to avoid common errors during busy seasons.

Worker Classification Checklist

Apply this checklist to classify workers correctly and dodge IRS audits. Focus on real-world construction scenarios like onsite supervision or tool ownership.

5 Behavioral Factors:

• Does the company set specific work hours and locations?
• Are detailed instructions given on how to perform tasks?
• Is training required or provided by the firm?
• Can the company discharge the worker at will?
• Is there a continuing relationship beyond one project?

6 Financial Factors:

• Does the worker invest in their own equipment or vehicles?
• Are business expenses reimbursed, or borne by the worker?
• Can the worker realise a profit or suffer a loss?
• Is payment fixed by time, or by the job?
• Does the worker work for multiple clients?
• Are services available to the general public?

Payroll Tax Withholding Errors

1099 contractors working more than 80% of time onsite often fail the 20-factor test, triggering average FICA liability around $15K. Construction companies overlook payroll tax withholding when misclassifying onsite labourers. This leads to unexpected bills during tax season.

Follow these numbered steps to calculate exposure from reclassification:

• Count onsite hours; IRS views over 70% as employee indicator.
• Apply FICA rates at 15.3% of wages for Social Security and Medicare.
• Add FUTA at 6% on the first $7K per worker.
• Calculate SUTA rates, typically 2.7-10% depending on state experience.

File Form 941 quarterly for proper withholding on W-2 employees. For example, in QuickBooks Payroll, set up classifications under worker profiles to track hours automatically. Switch from 1099 forms to W-2 to comply and avoid penalties on self-employment tax.

Improper Handling of Job Costing and Expenses

Poor job costing causes many construction deductions to be disallowed during audit. Construction companies often fail to track labor expenses, material costs, and overhead allocation properly. This leads to IRS adjustments and lost tax savings.

Understand the completed contract method versus the percentage-of-completion method under IRC §460 rules. The completed contract method recognises revenue only when jobs finish, suiting small builders. Larger firms with long-term projects must use percentage-of-completion to match income with costs over time.

Changing accounting methods requires Form 3115 with a 120-day filing window. Use QuickBooks job costing templates by enabling class tracking for projects and setting cost codes for labour, materials, and overhead. For example, assign labour codes to payroll and material codes to supplier invoices for accurate reporting.

Experts recommend reviewing job costs quarterly to avoid errors. A common mistake, like misallocating $18K in overhead, results in average deduction losses during audits. Proper setup ensures deductible expenses stand up to scrutiny.

Capitalisation vs. Expensing Equipment

Expensing a $35K skid steer as a repair instead of capital triggers audit adjustments under IRS Tangible Property Regulations. Construction companies must distinguish capital improvements from repairs. Wrong choices lead to disallowed deductions or penalties.

Follow Rev. Proc. 2015-56 for safe harbours. The de minimis safe harbour allows expensing items under $2,500. Apply the routine maintenance safe harbour for recurring work and the betterment test for enhancements extending asset life.

Consider these examples: A roof patch qualifies as a repair and is expensed. Installing a new HVAC system is capitalised as it improves the building. Repainting an interior often falls under safe harbour for expensing if routine.

Failing to Track Per Diem and Travel Deductions

Construction firms forfeit significant savings by claiming actual vehicle costs instead of the 67¢/mile 2024 IRS rate. This common tax mistake leads to underclaimed deductions for travel and per diem expenses. Workers on job sites often qualify for these benefits, yet many companies overlook proper tracking.

The 2024 GSA per diem rates for CONUS include $165 per day for lodging and $59 for meals and incidental expenses. These rates simplify expense reporting for construction workers traveling to remote sites. Use them to avoid meticulous receipt collection while staying compliant.

Meal deductions face a 50% limit, with an $80 substantiation threshold for expenses over that amount. IRS Publication 463 details rules, requiring hotel receipts for lodging claims like a $150 room at a site motel. Track these to support deductions during IRS audits.

Effective tracking methods include apps and forms tailored for construction travel. Choose options that fit your operations for accurate recordkeeping.

• Stride app for auto mileage tracking via GPS, ideal for job site drives.
• IRS Form 2106 for employee travel expenses, including per diem logs.
• QuickBooks with per diem categories to categorise worker allowances easily.

Incorrect Depreciation of Heavy Machinery and Vehicles

Using 5-year MACRS on a $150K excavator instead of 3-year class saves $42K first-year deduction, per IRS Pub 946. Construction companies often make this tax mistake by misclassifying equipment like excavators and bulldozers, which fall under 3-year property. This error delays deductions and increases taxable income in early years.

Trucks qualify for 5-year MACRS, while heavy machinery such as excavators and bulldozers use shorter lives. Failing to check the MACRS class life table leads to common errors in Form 4562. Proper classification maximises tax deductions for construction firms.

Section 179 allows expensing up to $1.22M in 2024, with phaseout at $3.05M. Combine it with bonus depreciation for optimal results. Consult IRS guidelines to avoid IRS audits on equipment depreciation.

Bonus depreciation phases down to 80% in 2024 and 60% in 2025. Record purchases accurately on Form 4562 Line 14 for special depreciation. This approach supports cash flow for general contractors and subcontractors.

Bonus Depreciation Oversights

Firms missing 80% bonus depreciation on $250K equipment purchase lose $200K immediate write-off under TCJA rules. Many construction companies overlook eligibility for used equipment acquired after 9/27/17. This tax mistake reduces first-year deductions significantly.

Follow these steps to claim bonus depreciation correctly:

• Verify used equipment qualifies if placed in service post-9/27/17, per IRS Notice 2018-82.
• Elect it on Form 4562 Line 14 for special depreciation allowance.
• Apply to qualified property before regular MACRS depreciation.

State conformity varies; California does not conform, while Texas does. Check local rules for multi-state operations to avoid state taxes surprises. This ensures full benefits for builders and developers.

For a $250K purchase at 37% rate, proper use yields $68K tax savings. Pair with Section 179 for heavy machinery like bulldozers. Engage a tax advisor to prevent oversights in job costing and equipment expenses.

Overlooking Home Office and Indirect Cost Deductions

Project managers lose $4,200 yearly simplified home office deduction (300 sq ft x $5/sq ft 2024 IRS rate). Construction companies often miss this home office deduction due to strict rules. Many fail the exclusive use test outlined in IRS Publication 587.

Exclusive use test requires the space for business only, no personal activities. For construction firms, a plans drafting room qualifies if used solely for blueprints. A project management corner in a garage works if separated and business-exclusive.

A tool storage area passes if dedicated to equipment organisation, not family use. Overlooking these leads to deductions disallowance in IRS audits. Track square footage accurately to claim properly.

Form 8829 worksheet allocates indirect costs like utilities proportionally. Choose based on your records and space size. Consult a tax advisor for construction-specific setups.

7 Indirect Costs Often Missed by Construction Companies

Construction firms frequently overlook indirect costs for home offices. These add up quickly for project managers working remotely. Proper allocation boosts deductible expenses.

• Internet: Claim 40% business portion if used for bids and emails.
• Utilities: Prorate electricity for heating the office space.
• Insurance: Homeowners policy portion covering business area.
• Repairs: Fixes to office-specific plumbing or wiring.
• Supplies: Paper and ink for job costing printouts.
• Depreciation: On home structure used exclusively for business.
• Rent: Fair share if home is rented, tied to square footage.

Use Form 8829 to calculate these precisely. Keep receipts for IRS audits. This avoids common errors in Schedule C or Form 1120 filings.

Mismanaging Sales Tax on Materials and Subcontracts

Multi-state contractors pay $67K avg use tax on materials bought tax-free for out-of-state jobs per Sales Tax Institute. Construction companies often overlook sales tax nexus rules when purchasing materials or hiring subcontractors across state lines. This leads to unexpected assessments during audits.

The 2018 Wayfair decision expanded economic nexus, requiring tax collection based on sales volume even without physical presence. Six states trigger nexus at $100K sales, while nine rely on physical presence alone. Tools like Avalara offer automation starting at $50/mo starter to track these thresholds.

Drop-shipment rules complicate matters, where the prime contractor pays tax on materials bought by subcontractors for delivery to the job site. For example, a general contractor in California might owe use tax on steel ordered tax-free by a Texas sub for a CA project. Proper invoicing and records prevent double taxation.

Subcontractors must understand state-specific rates to avoid common tax mistakes. Review contracts for tax responsibilities and maintain detailed logs of material costs and deliveries.

5 Common Subcontract Tax Errors

• Failing to charge sales tax on subcontracting fees in high-rate states like CA at 8.5%, leading to contractor liability on unreported amounts.
• Ignoring use tax on out-of-state materials delivered to jobs, such as tools bought tax-free in Nevada for a Texas site at TX 6.25%.
• Misapplying drop-shipment exemptions, where primes assume subs handle tax but end up owing on the full chain.
• Not segregating taxable labour from non-taxable materials in invoices, triggering full subcontract tax in states like Florida.
• Overlooking resale certificates validity, resulting in denied credits and penalties during IRS audits or state reviews.

These errors often stem from poor recordkeeping and multi-state operations. Construction firms should consult a tax advisor to map nexus and automate compliance with software integrations.

Ignoring Estimated Tax Payment Requirements

Many Schedule C construction filers incur significant underpayment penalties for missing the 90% or 100% safe harbour rules. Construction companies often overlook estimated tax payment requirements, leading to IRS notices and added costs. This common tax mistake hits seasonal businesses hard.

Quarterly deadlines follow a fixed calendar: Q1 due April 15, Q2 on June 17, Q3 on September 16, and Q4 on January 15. Missing these triggers penalties based on Form 2210. Calculate payments using 100% of the prior year's tax or 90% of the current year's liability.

Seasonal construction firms benefit from safe harbour rules via Form 2210 Schedule AI, which adjusts for uneven income. QuickBooks users can set up estimated taxes by going to Taxes, then Quarterly Estimates, and inputting prior year data. This automates reminders and tracks payments accurately.

• First-time abatement: Request via Form 843 with code for initial penalty relief.
• Reasonable cause: Submit documentation like illness or natural disasters.
• Penalty abatement codes: Use IRS guidelines for first-time or cause-based waivers.

Consult a tax advisor to avoid audits from underpayments. Proper planning keeps cash flow steady for construction companies.

Frequently Asked Questions

What are the most common tax mistakes construction companies make with employee classification?

One of the top Common Tax Mistakes Construction Companies Make is misclassifying workers as independent contractors instead of employees. This leads to underpaying payroll taxes, including Social Security, Medicare, and unemployment taxes. The IRS uses factors like control over work and financial arrangements to determine status—get it wrong, and you face back taxes, penalties, and interest.

How do construction companies often err in claiming equipment depreciation?

A frequent entry in Common Tax Mistakes Construction Companies Make is improper depreciation of heavy equipment like bulldozers or trucks. Companies might skip bonus depreciation under Section 168(k) or fail to use the correct recovery period (e.g., 5 years for most construction machinery). This results in overpaying taxes—consult IRS Publication 946 to maximise deductions correctly.

Why do construction firms overlook sales tax on materials?

Failing to collect or remit sales tax on materials sold to customers is among the Common Tax Mistakes Construction Companies Make. Even if you're a contractor, taxable materials passed through to clients require proper tax handling. State rules vary—non-compliance triggers audits, fines, and liens, so track exemptions like those for resale certificates meticulously.

What pitfalls exist with job costing and expense deductions?

Inaccurate job costing leads to one of the Common Tax Mistakes Construction Companies Make: deducting indirect costs (like overhead) as direct job expenses or vice versa. This distorts income and invites IRS scrutiny during audits. Use detailed accounting software to allocate costs properly and substantiate deductions with records.

How does missing Qualified Business Income (QBI) deduction hurt construction companies?

Many overlook the Section 199A QBI deduction, a key Common Tax Mistakes Construction Companies Make, which can reduce taxable income by up to 20% for pass-through entities. Construction qualifies, but wage and asset limitations apply—phase-outs start at certain income levels. File Form 8995 accurately to claim it and avoid leaving money on the table.

Why is poor record-keeping a top tax error for construction businesses?

A foundational issue in Common Tax Mistakes Construction Companies Make is inadequate record-keeping for receipts, invoices, and mileage logs. Without substantiation, deductions for fuel, tools, or travel get disallowed in audits. Implement digital tracking and retain records for at least 3-7 years to defend against IRS challenges effectively.