Construction Company Year-End Accounting Checklist for 2026

Year-end accounting for a construction company is categorically more complex than it is for most other businesses. Revenue recognition spans multiple periods, costs accumulate across dozens of active jobs simultaneously, retainage sits on the balance sheet for months before it converts to cash, and tax treatment depends heavily on which accounting methods your contracts qualify for. A structured year-end close process is not just good accounting hygiene. For construction companies, it is the difference between financial statements that accurately reflect business performance and statements that mislead lenders, bonding agents, and the IRS.

Construction companies face a year-end accounting challenge that general business accounting software and generic checklists are not built to handle. Jobs span calendar years, billing rarely matches the actual percentage of work completed, retainage withheld from billings and retainage payable to subcontractors sit in separate balance sheet accounts, and the IRS imposes specific revenue recognition requirements on long-term contracts that differ by contract type and company size.

Getting year-end right means your bonding capacity is accurately represented, your lender receives financial statements that reflect true working capital, your tax return is built on correctly recognized revenue, and your management team enters the new year with a clear, accurate picture of job profitability across every active project.

Step 1: WIP Schedule Reconciliation

The Work in Progress (WIP) schedule is the most important financial document a construction company produces. It tracks the financial status of every active job simultaneously and drives revenue recognition for the income statement. An inaccurate WIP schedule distorts reported profitability, misrepresents financial position to bonding agents and lenders, and creates tax exposure from incorrectly recognized revenue.

What the WIP Schedule Must Capture

For each active project at year-end, the WIP schedule should reflect:

• Original contract value plus all approved change orders to date
• Total estimated costs to complete the project, updated to reflect current scope, known risks, and any approved scope changes
• Costs incurred to date reconciled to the general ledger
• Percentage of completion, calculated using the cost-to-cost method: costs incurred to date divided by total estimated project costs
• Earned revenue to date: percentage complete multiplied by total contract value
• Billed to date: cumulative progress billings issued through year-end
• Overbilling (billings in excess of costs and estimated earnings): where billed amounts exceed earned revenue, creating a liability
• Underbilling (costs and estimated earnings in excess of billings): where earned revenue exceeds billed amounts, creating an asset

Reconciliation Steps

1. Pull cumulative costs charged to each job from the general ledger and verify they match the job cost reports
2. Confirm all approved change orders are reflected in the contract value and cost estimates
3. Verify that percentage-of-completion calculations use consistent methodology across all jobs
4. Reconcile the WIP schedule overbilling and underbilling totals to the balance sheet accounts
5. Compare year-to-date WIP profit against total gross profit from completed jobs. Material discrepancies point to timing issues in cost recognition or unrecorded change orders
6. Review jobs showing unusual profit fade (profit percentage declining as a project progresses) and determine whether revised cost estimates are needed

Katz Abosch's year-end WIP guidance specifically recommends that contractors reconcile current year revenue, costs, and gross profits against the income statement and general ledger before closing the period. Any gap between WIP-derived income and the P&L indicates an error that must be resolved before year-end financials are finalized.

Step 2: Retainage Review

Retainage is the portion of contract billings withheld by owners and general contractors until project completion milestones are met, typically 5% to 10% of each billing. It creates a cash flow gap between work performed and cash received that, if not properly managed, becomes a hidden financial liability by year-end.

Retainage Receivable

Review all outstanding retainage receivable balances at year-end and confirm:

• Each balance is recorded by project and reconciles to the contract and billing records
• The expected release timeline is documented based on substantial completion or final completion milestones under the contract
• Aging retainage receivable older than 12 months is flagged for follow-up or collectability evaluation
• Any retainage balances on completed projects that have not been released are actively pursued

On the balance sheet, retainage receivable on jobs still in progress is included in Contract Assets. Retainage on completed jobs is included in Contract Receivables. Misclassification between these categories distorts working capital presentation.

Retainage Payable

Review all retainage withheld from subcontractors:

• Confirm retainage payable balances by subcontractor reconcile to subcontract agreements and payment records
• Verify that retainage release timelines to subcontractors are consistent with when retainage is being received from the owner, noting that many states require retainage to be released to subcontractors within 7 to 10 days of the prime contractor receiving it
• Confirm retainage withheld from subcontractors has been correctly recorded as a liability, not netted against subcontract costs

Retainage and Tax Timing

Under the completed contract method, retainage income is not recognized until the contract is complete. Under the percentage-of-completion method, retainage is included in contract revenue as it is earned, even though cash has not been received. At year-end, confirm that retainage is being reported as income consistent with the revenue recognition method applied to each contract. Reporting retainage income too early creates unnecessary tax liability. Reporting it too late creates IRS exposure.

Step 3: Job Cost Variance Analysis

Every active project should be reviewed at year-end for cost performance against the original estimate:

• Cost overruns: Jobs where actual costs to date exceed the budget for work performed signal either estimating errors, scope creep without approved change orders, or productivity problems. Identify the cause and update the cost-to-complete estimate accordingly
• Unrecorded change orders: Work performed beyond the original contract scope that has not yet been approved or billed represents both a receivable asset and a risk. Document all pending change orders and assess collectability
• Profit fade: A pattern of decreasing profit percentage as a job progresses is one of the most important warning signals in construction accounting. If a job was estimated at 20% gross margin and is tracking at 12% at 70% complete, the final outcome is likely worse than current reporting suggests. Update estimates and recognize the projected loss immediately

Abacus Professionals' year-end construction guidance recommends reconciling cumulative WIP profit against total gross profit from completed jobs as a cross-check on the accuracy of in-progress estimates.

Step 4: Accounts Receivable and Billing Cleanup

Before year-end close, reconcile the accounts receivable aging and resolve outstanding billing issues:

• Issue all pending progress billings for work performed through year-end. Revenue that has been earned but not billed creates an underbilling position that understates both revenue and assets
• Review aged receivables and determine collectability for any balances over 90 days. Write off genuinely uncollectible balances after consulting with your accountant, as a bad debt deduction requires proper documentation
• Verify that all approved change orders have been billed and that disputed change orders are documented with supporting evidence
• Reconcile contract billings in the accounting system to actual invoices issued for each project

Step 5: Subcontractor Compliance and 1099 Preparation

Construction companies typically pay dozens of subcontractors and vendors each year. Year-end is the deadline for getting 1099 compliance right:

• Collect W-9s from all subcontractors and vendors paid $600 or more during the year if not already on file. Missing W-9s create exposure and complicate 1099 filing
• Identify all 1099-NEC recipients: All unincorporated subcontractors (sole proprietors, partnerships, and LLCs not taxed as corporations) paid $600 or more for services during 2025 require a Form 1099-NEC
• Verify payment totals for each subcontractor from the accounting system match what will be reported on the 1099
• Confirm filing deadlines: Form 1099-NEC must be filed with the IRS and provided to recipients by January 31, 2026 for 2025 payments

Incorrect or missing 1099 filings expose the construction company to penalties of $60 to $310 per form depending on the degree of lateness, with higher penalties for intentional disregard.

Step 6: Fixed Assets, Equipment, and Depreciation

Construction companies invest heavily in equipment, vehicles, and tools. Year-end is the time to update fixed asset records and maximize depreciation deductions:

• Reconcile the fixed asset schedule to the general ledger and confirm all equipment purchases, disposals, and transfers during the year are correctly recorded
• Document in-service dates for all equipment placed in service during 2025, as bonus depreciation eligibility under the One Big Beautiful Bill Act requires accurate in-service date documentation
• Apply 100% bonus depreciation: Equipment placed in service after January 19, 2025 qualifies for 100% first-year bonus depreciation under the OBBBA. This is one of the most significant construction tax benefits available in 2026, allowing full write-off of qualifying equipment purchases in the year placed in service
• Section 179 expensing: Consider Section 179 elections for equipment and vehicles that do not qualify for bonus depreciation, subject to the annual $1,220,000 limit for 2025
• Dispose of retired equipment properly: Assets taken out of service during the year should be removed from the fixed asset schedule, and any gain or loss on disposal should be calculated and recorded

Step 7: Tax Preparation Steps for 2026

Revenue Recognition Method Confirmation

Confirm that the revenue recognition method applied to each contract is consistent with prior years and legally appropriate:

• Percentage-of-completion method (PCM): Required under IRC Section 460 for long-term contracts by contractors above the $30 million gross receipts threshold (indexed for inflation). PCM recognizes revenue based on the percentage of the contract completed each year
• Completed contract method (CCM): Available to contractors below the $30 million threshold. Revenue and income are deferred until the contract is substantially complete, which can provide significant tax deferral benefits
• Residential construction exemption: Under the OBBBA, all residential construction (including large multifamily projects) can now avoid the percentage-of-completion requirement, simplifying accounting for residential contractors

Key Tax Deductions and Credits for 2026

• 100% bonus depreciation on qualified property placed in service after January 19, 2025
• Section 179D deduction for energy-efficient commercial building improvements: up to $5.65 per square foot for qualifying projects, but note that Section 179D generally expires for projects on which construction begins after June 30, 2026 under the OBBBA. Review your project pipeline immediately to confirm eligibility
• 45L energy-efficient home credit: Up to $5,000 per unit for qualifying residential construction projects meeting energy efficiency standards
• R&D immediate expensing: Construction companies that innovate, including developing new construction techniques, materials applications, or custom engineering solutions, can now deduct research expenses in the year incurred rather than capitalizing over five years
• 20% QBI deduction: Now permanent under the OBBBA for pass-through entities (S-corporations, partnerships, and sole proprietors), providing a 20% deduction on qualified business income subject to income threshold limitations
• Business interest deduction: The OBBBA generally increases the deductible business interest amount compared to prior law. Confirm with your CPA whether previously limited interest deductions can now be fully claimed

Payroll and Employment Tax Reconciliation

• Reconcile Form 941 quarterly filings to W-2 totals before year-end close. Any discrepancy must be resolved before W-2s are issued
• Verify that worker classification is correct for all workers. Misclassifying employees as independent contractors creates significant payroll tax exposure in the construction industry, which is specifically targeted by IRS enforcement
• Confirm that certified payroll reports for prevailing wage projects are complete and filed for all applicable periods

Year-End Construction Accounting Checklist: Summary

Category	Key Tasks
WIP Schedule	Reconcile costs and revenue to GL; update cost-to-complete; verify overbillings and underbillings
Retainage	Review receivable and payable by project; confirm release timelines; check tax reporting consistency
Job Cost Variance	Identify overruns and profit fade; document unapproved change orders; recognize projected losses
Accounts Receivable	Issue pending billings; review aged balances; write off uncollectibles
1099 Compliance	Collect W-9s; identify 1099-NEC recipients; verify payment totals; file by January 31
Fixed Assets	Reconcile schedule; document in-service dates; apply bonus depreciation and Section 179
Revenue Recognition	Confirm PCM or CCM consistency; apply residential construction exemption where applicable
Tax Deductions	Bonus depreciation; 179D before June 30, 2026 cutoff; QBI; R&D expensing; 45L credit
Payroll	Reconcile 941 to W-2; verify worker classification; complete certified payroll reporting

How NSKT Global Can Help

Construction accounting demands expertise that general accountants and bookkeepers typically do not possess. WIP methodology, retainage accounting, long-term contract revenue recognition, certified payroll compliance, and construction-specific tax strategy require a team that understands the construction industry from the ground up.

NSKT Global provides comprehensive construction accounting and bookkeeping services for contractors, subcontractors, and construction companies of all sizes, including:

• WIP schedule preparation, reconciliation, and ongoing maintenance using percentage-of-completion methodology
• Retainage receivable and payable tracking by project, with aging analysis and release timeline management
• Job cost reporting and variance analysis identifying cost overruns, profit fade, and unapproved change orders
• Year-end close process management including balance sheet reconciliation, subcontractor 1099 preparation, and fixed asset schedule updates
• Tax return preparation for construction companies utilizing all applicable deductions including bonus depreciation, Section 179D, 45L, QBI, and R&D expensing
• Revenue recognition method analysis and CCM vs. PCM election optimization based on company size and contract mix
• Certified payroll and prevailing wage compliance for government-contracted projects
• Bonding and lender financial statement preparation with WIP schedule support

People Also Ask

What is the difference between overbilling and underbilling in construction?

Overbilling occurs when a contractor has billed more than the revenue earned based on the percentage of project completion. It represents a liability because the contractor has received payment for work not yet performed. Underbilling is the opposite: the contractor has performed more work than they have billed for, representing an asset (earned but uncollected revenue). Both are tracked on the WIP schedule and reported on the balance sheet as contract liabilities and contract assets respectively.

How does the completed contract method affect year-end taxes for contractors?

Under the completed contract method, revenue and expenses for a long-term contract are deferred until the contract is substantially complete. This can provide significant cash flow benefits by delaying tax on project income to the year the job completes rather than recognizing it proportionally each year. However, the completed contract method is only available to contractors with average annual gross receipts of $30 million or less (indexed for inflation). Above this threshold, the percentage-of-completion method is generally required under IRC Section 460.

When is retainage recognized as taxable income?

The tax treatment of retainage depends on the revenue recognition method. Under the percentage-of-completion method, retainage is included in contract revenue as work is performed and earned, even though cash has not been received. Under the completed contract method, retainage income is deferred until the contract is substantially complete. Contractors using cash-basis accounting for tax purposes recognize retainage when it is actually received. Your tax method must be applied consistently and any change in method requires IRS approval.

Does bonus depreciation apply to used equipment purchases?

Yes. Under the bonus depreciation rules reinstated and expanded by the OBBBA, 100% first-year bonus depreciation applies to both new and used qualified property placed in service after January 19, 2025, provided the property has not been previously used by the taxpayer or a related party. This means a construction company that purchases a used excavator or truck in 2025 can deduct the full purchase price in the year it is placed in service rather than depreciating it over its useful life.