What is construction accounting?
Published
Construction accounting organizes revenue and cost by project or contract. It differs from ordinary sales because work may run for months, costs may occur before collection, and contracts often include advances, retentions, and progress billings.
The examples on this page use a fictional business (Al Waha Office Supplies). Figures are illustrative only and are not real business data or sector benchmarks.
Short answer
Construction accounting treats each project as its own profitability and cash unit. A project may look profitable overall while losing margin through overruns, or it may earn accounting profit while cash is trapped in billings and retentions.
Key elements
| Element | Meaning |
|---|---|
| Project | The main profitability unit |
| Progress billing | A claim for work completed |
| Advance payment | Cash received before full delivery |
| Retention | Amount held until completion or warranty |
| Percentage of completion | Common basis for measuring long-contract revenue |
Worked example
A contract is worth SAR 500,000. By month-end, actual cost is SAR 120,000 and expected total cost is SAR 400,000.
Completion percentage = 120,000 ÷ 400,000 = 30%Revenue recognized = 500,000 × 30% = SAR 150,000Period profit = 150,000 - 120,000 = SAR 30,000
If the progress billing is SAR 150,000 and the customer retains 10%, immediate collectible amount is SAR 135,000 and retention is SAR 15,000.
Common mistakes
| Mistake | Effect |
|---|---|
| Mixing every project's expenses in one centre | No way to tell profitable projects from losing ones |
| Treating an advance payment as full revenue on receipt | Profit is inflated before completion |
| Ignoring retentions | Expected short-term collections are inflated |
Metrics to track per project
| Metric | What it reveals |
|---|---|
| Actual cost vs budget | Is the project burning margin? |
| Billings vs progress | Is invoicing behind work performed? |
| Collections vs billings | Is profit trapped in receivables? |
| Retentions | How much cash will not arrive soon? |
Example 2: profitable project, weak cash
A project may show expected profit of SAR 60,000, but the customer retains 10% and pays 45 days later. The income statement may look healthy while the bank account is tight. Construction accounting needs both profitability and cash-flow views.
Important project documents
| Document | Why it matters |
|---|---|
| Contract | Defines value, duration, and obligations |
| Change order | Explains cost or revenue increase |
| Progress billing | Supports work claimed |
| Acceptance report | Supports completion and approval |
| Cost report | Shows project profitability |
Frequently asked questions
Does every project need a cost center?
Usually yes. A project is the natural place to collect materials, labor, subcontractors, and direct expenses.
Is a progress billing an invoice?
It may support or become an invoice, but its main role is to claim completed work.
What is the most important construction accounting report?
Project profitability, compared against actual cost, expected cost, collections, and retentions.