Job Costing & WIP Reporting
Built for How Construction Actually Works
Construction accounting isn't standard bookkeeping with extra steps — it's project-based from the ground up. Our offshore team handles job costing, WIP schedules, retainage, and progress billing so you always know where every project actually stands.
Why Generic Bookkeeping Falls Apart on a Job Site
Most bookkeeping software and most bookkeepers are built around a simple model: track income, log expenses, send invoices. That model works fine for a consulting firm or a retail shop. It breaks down almost immediately for a contractor running several active jobs at once, each with its own budget, change orders, retainage, and billing schedule.
Without job costing by cost code, a contractor can't actually tell whether Job #214 is profitable or Job #219 is bleeding money until the project closes out — months after the decisions that mattered were already made. Without accurate WIP reporting, overbilling and underbilling positions go unnoticed until a bonding company or lender asks a question nobody can answer with confidence.
This isn't a bookkeeping inconvenience. In a tight-margin industry, inaccurate job costing is one of the most common reasons profitable-looking contractors quietly lose money on the jobs that mattered most.
No Job-Level Cost Visibility
Costs tracked at the company level instead of by project mean nobody knows which jobs are actually profitable until it's too late to act.
Inaccurate WIP Reporting
Overbilling and underbilling positions go undetected, distorting both reported profit and the numbers lenders and bonding companies rely on.
Retainage Strains Cash Flow
Withheld retainage on receivables and payables gets mixed in with regular balances, hiding how much cash is actually available right now.
Change Orders Go Untracked
Scope changes affect budget and billing, but without a documented process, change orders quietly erode margin without anyone noticing.
Certified Payroll Compliance
Prevailing wage and union payroll requirements demand precise job-code allocation of labor — errors create real compliance exposure on public projects.
Generalist Bookkeepers Don't Know the Terms
AIA billing, schedule of values, and percentage-of-completion accounting require specialized knowledge most general bookkeepers were never trained on.
How OneTrust Bookkeeping Tracks Every Job Like It's the Only One
OneTrust Bookkeeping's construction accounting model is built around the job, not the company total. Every cost is coded to its project and cost code from day one, so you can see exactly which jobs are performing and which ones need attention — not after closeout, but while there's still time to act.
Whether you're running five active jobs or fifty, the same disciplined process applies: cost-coded job tracking, monthly WIP schedules, and reporting built to the standard your lender, bonding company, or bank actually expects to see.
Cost Codes Set Up Job by Job
Labor, materials, subcontractors, and equipment are allocated to the correct project and cost code, giving you real-time visibility into actual cost versus estimate.
Monthly WIP Schedules, Not Quarterly Surprises
Overbilling and underbilling positions are identified every month — not discovered for the first time when a bonding company asks for documentation.
Retainage Tracked Separately From Regular Balances
Held-back amounts on receivables and payables are tracked apart from regular balances, so your real cash position is never overstated.
Reporting That Holds Up With Lenders & Bonding Companies
Financial statements connect directly to our broader financial reporting service, formatted to the standard these institutions actually expect.
Construction Accounting Built Around the Job, Not the Company Total
Every engagement is scoped around your active project count, billing structure, and reporting requirements — these are the core deliverables that keep every job financially visible.
Job Costing & Cost Codes
Labor, materials, subcontractor, and equipment costs allocated to the correct project and cost code, giving you real-time job-level profitability tracking.
WIP Reporting
Monthly work-in-progress schedules identifying overbilling and underbilling positions, formatted for internal review, lenders, and bonding companies.
Percentage-of-Completion Accounting
Revenue recognized based on costs incurred to date versus total estimated cost, with completed-contract method support where it fits better.
Retainage Tracking
Customer-withheld and subcontractor-withheld retainage tracked separately from standard receivables and payables for accurate cash visibility.
AIA Billing & Schedule of Values
Progress billing structured against a schedule of values, tracking billed-to-date amounts by line item across the life of each project.
Certified Payroll & Prevailing Wage
Certified payroll reporting and prevailing wage compliance for government and public works projects, with accurate job-code labor allocation.
Subcontractor & Vendor Management
Subcontractor invoices, lien waivers, 1099 tracking, and payment scheduling managed alongside accurate job cost allocation.
Job Cost Catch-Up & Cleanup
If job costing has been inaccurate or untracked for months, we scope a structured catch-up project. See our catch-up bookkeeping service.
What Changes When Job Costing Is Actually Accurate
The value isn't just compliance. It's knowing in real time which jobs are making money and which need attention before the project closes out.
50–65% Cost Reduction
Replace a construction-experienced in-house hire at $50,000–$70,000 fully loaded with offshore expertise at a fraction of the cost.
Real Job-Level Profitability
Know which projects are actually profitable while they're still active — not months after closeout when it's too late to course-correct.
WIP Reports Lenders Actually Trust
Monthly WIP schedules formatted to the standard bonding companies and banks expect, reducing back-and-forth during capacity reviews.
Clearer Cash Flow Around Retainage
Separating retainage from regular balances means you always know how much cash is truly available right now, not just on paper.
Compliance-Ready Payroll Records
Certified payroll and prevailing wage reporting reduce compliance risk on government and public works contracts.
USA, Canada & Australia Coverage
One team trained across US GAAP revenue recognition, Canadian holdback rules, and Australian security of payment regulations.
Construction-Specialized Outsourcing vs. a Generalist In-House Hire
A like-for-like comparison against hiring a construction-experienced bookkeeper in-house, across the USA, Canada, and Australia.
| Cost Factor | In-House Construction Bookkeeper | OneTrust Bookkeeping |
|---|---|---|
| Annual fully loaded cost | $50,000 – $70,000 | ✓ $20,000 – $35,000 |
| Job costing expertise | Often learned on the job | ✓ Specialized from day one |
| WIP reporting frequency | Quarterly or reactive | ✓ Monthly, proactive |
| Recruiting a specialist | Difficult and expensive | ✓ No recruiting cost |
| Scaling with project volume | Fixed headcount | ✓ Scales with active jobs |
| Certified payroll compliance | Risk of allocation errors | ✓ Built-in expertise |
| Multi-market expertise | One jurisdiction | ✓ USA, Canada, Australia |
| Contract commitment | Employment contract | ✓ Month-to-month |
*Based on average fully loaded US construction bookkeeper salary of $50,000–$70,000. OTB pricing varies by job count, billing complexity, and reporting needs. Use our cost calculator for a personalized estimate.
From Discovery to Accurate Job Costing — Step by Step
A structured path built around your active job count, billing method, and reporting obligations to lenders or bonding companies.
Discovery
We map your active jobs, software, billing method, and current job costing or WIP reporting gaps.
Cost Code Setup
We build or refine your cost code structure by labor, materials, subcontractors, and equipment for every active job.
Job-Level Allocation
Transactions are coded to the correct project and cost code, with retainage and change orders tracked from day one.
Monthly WIP & Reporting
WIP schedules, job profitability reports, and financial statements delivered on a consistent monthly cycle.
Scale With Your Pipeline
Capacity flexes as you add or close out projects, without renegotiating scope every time your job count changes.
Construction Accounting Across Every Trade and Project Type
Job costing and WIP reporting needs vary by trade and contract type. Our team adapts the approach to how your business actually operates.
General Contractors
Multi-job portfolios with subcontractor coordination, AIA billing, and consolidated WIP reporting across active projects.
Specialty Trades
Electrical, plumbing, HVAC, and other specialty subcontractors needing accurate job costing without a full back-office team.
Residential Builders
Custom home and residential construction with draw schedules, change order tracking, and homeowner-facing reporting.
Public & Government Contractors
Certified payroll, prevailing wage compliance, and bonding-ready WIP reporting for public works and government projects.
We Work Inside the Construction Platforms You Already Use
No forced migrations. Our team works inside your existing construction accounting and project management software.
QuickBooks Contractor
Job costing, class tracking, and WIP setup inside QuickBooks Online and Desktop.
Sage 100 / 300 CRE
Construction and real estate-specific job costing, payroll, and project accounting.
Procore & Buildertrend
Project management integration support alongside your accounting platform.
Viewpoint & Foundation
Enterprise-level construction accounting for larger contractors and GCs.
Also supporting Xero, NetSuite, and certified payroll reporting tools. View all software expertise →
What Makes Our Construction Accounting Different
A basic bookkeeper, in-house or outsourced, may not fully understand revenue recognition or job costing nuances. We built our process specifically around how construction projects actually run.
Job-First, Not Company-First Accounting
Every transaction is coded to its project and cost code from day one — not aggregated at the company level and sorted out later.
Monthly WIP, Not Reactive Reporting
Overbilling and underbilling positions are caught every month, so there are no surprises when a bonding company or lender asks for documentation.
Retainage Never Mixed Into Regular Balances
Held-back amounts are tracked separately by design, so your reported cash position always reflects what's actually collectible.
Certified Payroll Expertise Built In
Prevailing wage and union payroll allocation are handled by a team that understands the compliance stakes on public projects.
Tri-Market Construction Expertise
US GAAP revenue recognition, Canadian holdback rules, and Australian security of payment regulations handled by one team.
No Long-Term Contract Required
Capacity scales with your active job count and pipeline — no fixed headcount cost during slower periods between projects.
Construction Bookkeeping — Frequently Asked Questions
Questions contractors and builders ask before starting a construction accounting engagement.
Ready to Know Where Every Job Actually Stands?
Talk to our team about your active jobs, billing structure, and reporting needs. Most contractors are live with accurate job costing and monthly WIP reporting within days, not weeks.