Section 43CB of the Income Tax Act, 1961 standardizes the computation of income from construction contracts and service contracts by mandating specific revenue recognition methods. Below is a detailed breakdown of its provisions, applicability, and implications.
1. Key Features of Section 43CB
- Objective: Ensures uniform tax treatment for long-term contracts by aligning with Income Computation and Disclosure Standards (ICDS).
- Methods Prescribed:
- Percentage of Completion Method (PCM)(default for most contracts).
- Project Completion Method(for contracts ≤ 90 days).
- Straight-Line Method(for indeterminate acts over a period).
- Retrospective Effect: Applies from A.Y. 2017–18 onward.
2. Applicability
A. Covered Contracts
- Construction Contracts:
- Building, infrastructure, or asset development projects (e.g., real estate, roads).
- Includes related services (e.g., architects, project managers).
- Service Contracts:
- IT services, consultancy, maintenance, or installation spanning multiple years.
B. Exceptions
- Short-term service contracts(≤ 90 days): Use Project Completion Method.
- Indeterminate acts(e.g., annual maintenance): Use Straight-Line Method.
3. Methods of Income Recognition
| METHOD | WHEN APPLICABLE? | KEY RULES |
| Percentage of Completion (PCM) | Default for most contracts | Revenue recognized based on work completed (e.g., 30% work done → 30% revenue). |
| Project Completion | Contracts ≤ 90 days | Entire profit recognized only upon completion. |
| Straight-Line | Indeterminate acts (e.g., monthly maintenance) | Income spread evenly over the contract period. |
Key Adjustments
- Retention Money: Included in revenue (even if unpaid).
- Incidental Income: Interest/dividends notdeducted from contract costs.
4. Compliance Requirements
- Documentation: Maintain project progress reports, cost records, and completion certificates.
- Disclosures in ITR:
-
- Method used (PCM/Straight-Line/Project Completion).
- Retention money and advances received.
- Consistency: Method must align with ICDS-III(for construction) and ICDS-IV (for services)


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