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Accounting in Commercial Mechanical Construction

Contractor accounting is not standard corporate accounting. Revenue is earned job by job over months, cash is held back as retainage, and one missed lien waiver can stop a payment. Here is how the accounting team is built and what each seat handles.

Accounting roles at a mechanical contractor

CFO

Owns finance strategy, banking, bonding and the relationship with the surety, auditors and lenders. Reads the WIP schedule as a forecast of company health.

  • Bonding capacity and working capital
  • Audited or reviewed financials
  • Usually CPA; construction background expected

Controller / assistant controller

Runs the monthly close, the WIP schedule, financial statements and the accounting staff. Makes sure job cost, billing and the general ledger agree.

  • Percentage-of-completion revenue under ASC 606
  • Over/under billings review with PMs
  • CPA or CCIFP common

Project accountant

Works beside project managers on job setup, budgets, cost codes, change orders and monthly pay applications. The link between the field and finance.

  • AIA G702/G703 pay apps and schedule of values
  • Committed cost and subcontract tracking
  • Cost-to-complete support

Staff / general ledger accountant

Handles journal entries, reconciliations, accruals, fixed assets and equipment costs, and supports the close and audit.

Accounts payable

Pays suppliers and subcontractors against purchase orders and subcontracts, matched to job and cost code.

  • Three-way match: PO, receipt, invoice
  • Collects subcontractor lien waivers and insurance certificates
  • Joint checks and pay-when-paid terms

Accounts receivable and billing

Bills construction progress, T&M and service work. Construction billing follows the schedule of values; service billing runs off work orders and maintenance agreements.

  • Retainage billing and release
  • Owner and GC billing portals
  • Conditional and unconditional lien waivers

Collections

Follows up on past-due pay apps and service invoices, tracks retainage owed and protects lien rights with notices and deadlines.

  • Preliminary notices and lien deadlines by state
  • Aging reports reviewed with PMs and service managers
  • Closeout documents that release final payment

Payroll

Pays union and merit-shop crews across many jobs and pay scales.

  • Certified payroll on prevailing wage work (Davis-Bacon, WH-347)
  • Union fringe remittances by local
  • Multi-state and job-based labor costing

What makes contractor accounting different

WIP schedule

The work-in-progress report shows each job's contract, cost to date, estimated cost to complete, earned revenue and over/under billing. Sureties and banks read it closely.

Job costing

Labor, material, equipment and subcontract costs coded to every job and phase so PMs can see fade or gain early.

Pay applications

Monthly progress billing on a schedule of values, usually on AIA G702/G703 forms or a GC's portal.

Retainage

Commonly 5% to 10% held back from each pay app until completion, which makes cash flow planning critical.

Lien waivers and notices

Waivers trade lien rights for payment. Preliminary notices protect those rights. Rules vary by state.

Change orders

Pending and approved change orders must be tracked so revenue and cost stay accurate.

Bonding and surety

Bonding capacity depends on clean, timely financials and a reliable WIP.

Service accounting

Maintenance agreements, recurring billing, T&M work orders and parts inventory for the service division.

Credentials and experience that matter

CPA

Common for CFOs and controllers.

CCIFP

Certified Construction Industry Financial Professional, from the Institute of Certified Construction Industry Financial Professionals.

Construction ERP experience

Hands-on use of a construction accounting system with job cost, AP, AR and payroll modules carries a lot of weight.

Prevailing wage and union payroll

Experience with certified payroll and fringe reporting is hard to find.

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