Cost-code design
Labor, burden, materials, equipment, subcontractors, and overhead mapped consistently from estimate through closeout.
CPA services for contractors
A Construction CPA Who Understands the Job Behind the Numbers
Job costing, WIP, tax planning, accounting, payroll, and owner strategy coordinated by one CPA-led team.
Designed for established contractors and construction companies that need a dependable accounting and tax system, not inexpensive year-end return assembly.
Written by Bryan Martin, CPA, Managing Partner and Founder of Taxstra. Last updated August 23, 2026.
The short answer
A construction CPA should turn project data into reliable job margins, tax projections, cash decisions, and defensible filings. Generic deduction lists cannot fix weak WIP, stale estimates, or uncoordinated multi-state payroll.
A strong fit
- General and specialty contractors with active jobs
- Owners using multiple entities or equipment companies
- Companies that need monthly job and cash visibility
- Contractors operating or staffing across state lines
- Teams willing to improve estimating and accounting inputs
Probably not the right fit
- A new side job with minimal activity
- A business shopping only for the lowest return-preparation fee
- An owner unwilling to provide job-level data
- A request for an audit or legal opinion outside the agreed scope
Built for project economics
Construction accounting starts with the job, not the general ledger total
Useful books show estimated cost, committed cost, cost to date, billings, retainage, gross profit, and cash position by job.
A profitable company can still run out of cash when billing, retainage, payroll, materials, and debt service move on different schedules. Conversely, cash received in advance is not automatically earned profit. The CPA’s job is to reconcile the financial, tax, and operational views without pretending they are identical.
Go deeper: construction tax deduction guide · contractor tax-planning guide
Management information
Job costing and WIP that owners can actually use
WIP schedule
Contract value, approved change orders, estimated cost, cost incurred, billings, retainage, and expected margin in one reviewable schedule.
Margin review
Estimate-to-actual differences and margin fade surfaced while management can still change the job.
Close discipline
Bank, card, payroll, debt, retainage, and intercompany accounts reconciled on a defined monthly schedule.
| Signal | What it can mean | Next question |
|---|---|---|
| Underbilling | Work is ahead of invoices or costs are misclassified | Is billing delayed, disputed, or unsupported? |
| Overbilling | Cash is ahead of earned revenue | What future costs must that cash fund? |
| Margin fade | Costs are rising faster than estimates | Which job, code, or change order explains it? |
| Old retainage | Collection or closeout risk | Is documentation complete and collectible? |
Method and timing
Cash, accrual, completed-contract, and percentage-of-completion questions
The available federal method depends on the company and the contract; the books may need additional reporting for owners, lenders, or sureties.
Method selection is not a slogan and should not be changed casually. Review gross receipts, entity structure, contract length and type, home-construction treatment, related entities, prior methods, and whether a change requires IRS consent. State conformity must be checked separately.
Primary-authority checkpoint
Implementation should cite current Internal Revenue Code Sections 460 and 448, applicable Treasury Regulations, current method-change guidance, and the relevant state authority. Thresholds and automatic-change procedures require annual review.
High-dollar moving parts
Equipment, vehicles, payroll, and subcontractors
- Model purchase, finance, lease, business-use, and disposition consequences before acquiring equipment
- Track depreciation systems and state conformity separately
- Allocate labor burden consistently to jobs
- Document worker classification and collect Forms W-9 before payment
- Coordinate Forms 1099, payroll filings, and multi-state work locations
- Reconcile fleet expenses, personal use, reimbursements, and accountable-plan procedures
Go deeper: heavy-vehicle tax guide · payroll and contractor compliance · bonus depreciation guide
Company and owner together
Entity, compensation, retirement, and estimated-tax planning
The owner’s return, payroll, distributions, retirement plan, real estate, and other entities should be projected alongside company results. A tax strategy that weakens bonding capacity, cash reserves, or lending covenants may be a poor business decision even when it reduces current tax.
Entity and compensation
Review legal structure with counsel, tax classification, payroll, distributions, and reasonable compensation where applicable.
Retirement design
Match contribution goals to workforce demographics, cash flow, and plan-administration obligations.
Tax projection
Use current job and overhead data to update federal and state estimates before deadlines.
Multi-entity view
Reconcile equipment entities, property entities, operating companies, intercompany activity, and ownership reporting.
Qualification
When a specialized construction CPA relationship pays for itself
| Situation | Likely need | First deliverable |
|---|---|---|
| Jobs are profitable but cash is unpredictable | Job/WIP and cash-cycle diagnosis | Reliable WIP and billing review |
| Books are cleaned up only at tax time | Monthly close redesign | Chart, reconciliations, and close calendar |
| Company crossed states or entity lines | Nexus and filing map | State/entity responsibility matrix |
| Surety or lender requests financials | Scope and assurance coordination | Confirm required statement level first |
| Only need a basic annual return | Commodity preparation may be enough | Do not buy an advisory scope you will not use |
The working relationship
How the engagement works
- 01
Diagnostic
Review entities, returns, contracts, books, WIP, payroll, equipment, state activity, and outside reporting requirements.
- 02
Accounting foundation
Standardize job structure, reconciliations, close ownership, and management reporting.
- 03
Planning cadence
Project taxes, coordinate purchases and compensation, and address state or contract changes before deadlines.
- 04
Return and reset
Prepare filings, reconcile actual results to projections, and roll unresolved job and owner decisions into the next cycle.
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Frequently Asked Questions
Related Resources
Educational information only, not individualized tax, legal, or investment advice. Federal rules are discussed unless stated otherwise; state treatment and exceptions can differ.
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