Industry-Specific GuidesDOC-INDUSTRY-CONSTRUC

Construction ERP: Project Accounting

ERP requirements for construction and contracting, including job costing, progress billing, retention management, certified payroll, and the unique financial management needs of project-based construction.

12 min read
2,600 words
Updated 2026-02-24

Construction Is Project-Based#

Construction and contracting businesses are fundamentally project-based. Every job is unique, with its own budget, timeline, and profitability. ERP systems for construction must excel at project accounting.

Core Construction Requirements#

Job Costing#

Job costing is the foundation of construction ERP:

Cost categories: - Labour - Materials - Equipment - Subcontractors - Overhead

Cost tracking: - By project - By phase/stage - By cost type - By responsibility

Budget vs actual: Real-time comparison to budget.

Progress Billing#

Construction billing differs from standard invoicing:

Progress claims: Billing based on completion percentage.

Schedule of values: Detailed breakdown of contract value.

Retention: Amounts withheld until completion.

Change orders: Adjustments to original contract.

Retention Management#

Retention protects project owners:

Retention percentage: Typically 5-10% of claim.

Release timing: Upon practical completion, defects period.

Tracking: Retention receivable by project.

Commitment Accounting#

Construction requires commitment tracking:

Purchase orders: Committed costs for materials.

Subcontract agreements: Committed costs for subcontractors.

Budget impact: Committed vs actual vs budget.

Construction-Specific Functionality#

Certified Payroll#

Government contracts require certified payroll:

Prevailing wage: Wage rates by trade classification.

Fringe benefits: Benefit calculation and reporting.

Reporting: Weekly certified payroll reports.

Union Requirements#

Union construction has additional requirements:

Craft classification: Worker classification by trade.

Benefit funds: Contributions to union funds.

Reporting: Union reporting requirements.

Equipment Management#

Construction equipment is a significant asset:

Utilisation tracking: Equipment usage by project.

Maintenance scheduling: Preventive maintenance.

Cost allocation: Equipment costs to projects.

Depreciation: Asset accounting.

Subcontractor Management#

Subcontractors are a major cost component:

Pre-qualification: Subcontractor vetting.

Insurance tracking: Certificate management.

Payment management: Subcontractor payments.

Retention: Retention from subcontractor payments.

Financial Reporting#

Work in Progress (WIP)#

WIP reports show project status:

Contract value: Total contract amount.

Costs to date: Actual costs incurred.

Earned revenue: Revenue recognised.

Backlog: Remaining contract value.

Percentage of Completion#

Revenue recognition for long-term contracts:

Cost-to-cost: Based on costs incurred.

Units delivered: Based on physical progress.

Survey of work: Based on engineering assessment.

Over/Under Billing#

Billing compared to revenue recognition:

Over billing: Billed more than earned.

Under billing: Earned more than billed.

NZ/AU Considerations#

New Zealand#

Construction Contracts Act: Payment rules and adjudication.

Health and safety: Site safety requirements.

Building Code: Compliance requirements.

Australia#

Security of Payment: Payment claim requirements vary by state.

Building codes: National Construction Code.

Industrial relations: Fair Work requirements.

Vendor Landscape#

Enterprise#

SAP: Comprehensive, complex implementation.

Oracle: Strong project accounting.

Trimble: Construction-specific (Viewpoint, Prolog).

Mid-Market#

Sage: Popular in construction (300 Construction, 100 Contractor).

Foundation: Construction-focused.

CMiC: Construction-specific.

Local Options#

Jobpac: Australian construction software.

RedTeam: Construction management.

Implementation Considerations#

Project Structure#

Design project structure carefully:

Project levels: Project, phase, task.

Cost structure: Standard cost categories.

Reporting structure: Company, division, region.

Integration#

Construction ERP typically integrates with:

Estimating: Estimate to project budget.

Scheduling: Schedule to project timeline.

Field operations: Field data collection.

Document management: Project documentation.

Change Management#

Construction organisations have unique change challenges:

Field operations: Remote workers, multiple sites.

Union environment: Workforce considerations.

Project teams: Temporary project organisations.

Conclusion: Construction ERP Is Specialised#

Construction ERP is not general ERP with job costing added. It requires deep functionality for project-based financial management, retention, certified payroll, and construction-specific reporting.