Construction and works contracts typically involve milestone billing based on project progress and retention money held back until completion or defect liability period. Determining the correct time of supply for such payments is crucial for GST compliance.
Nature of Construction Contracts
A works contract is a supply of services under GST. Construction contracts often span several months or years, with periodic invoices based on milestones. They may be treated as continuous supply of services if the contract period exceeds three months and payment obligations are periodic.
Time of Supply for Milestone Billing
If the construction contract is a continuous supply of services with payment linked to milestone completion, the time of supply depends on the terms.
Rule for Continuous Supply of Services
Under Section 13(3) and related provisions, for continuous supply of services:
- Where payment is linked to the completion of a defined event (such as a milestone), the time of supply is the date of completion of that event or the date of payment, whichever is earlier.
- Where payment is linked to periodic completion (e.g., monthly progress), the time of supply is the earlier of the date of expiry of the period to which the payment relates or the date of payment.
Thus, for a milestone-based invoice:
- Milestone completion date: e.g., casting of slab completed on 30 April.
- Invoice issued on 5 May.
- Payment due within 15 days, received on 20 May.
Time of supply = earliest of milestone completion date (30 April) and payment date (20 May) = 30 April. GST must be reported in April's return.
If payment is received before milestone completion (advance), the advance date triggers time of supply.
Retention Money
Retention money is a portion of each milestone invoice that the customer withholds to ensure contract performance, usually 5-10% of the contract value. It is released after completion or after the defect liability period.
When Is Retention Money Taxable?
Retention money is part of the consideration for the supply. The time of supply for retention money depends on when the supplier becomes entitled to receive it.
- If the retention money is part of the consideration for the original supply and is withheld but due and payable upon completion of the milestone, the time of supply is the earliest of milestone completion, invoice date, or payment for the full amount, even if the retention is not physically received.
- If the retention is not due until a later event (e.g., release after defect liability period), the time of supply may be when the amount becomes due or is received, whichever is earlier.
Example
Contractor invoices Rs 10,00,000 for a milestone completed on 30 April. Customer pays Rs 9,00,000 immediately and retains Rs 1,00,000 until final completion on 31 December.
- The Rs 10,00,000 is consideration for the milestone supply. Time of supply for the full Rs 10,00,000 is 30 April (milestone completion). The contractor must pay GST on Rs 10,00,000 in April, even though Rs 1,00,000 is not received yet.
- If the retention amount is linked to a separate performance obligation and is not part of the milestone consideration, the analysis may differ.
Release of Retention
When retention money is released after final completion:
- If tax was already paid at the time of milestone (as above), no further GST is payable on release; the release is just receipt of payment.
- If retention was treated as not due until release and tax was not paid earlier, the time of supply on release is the date of release or the date it becomes due, whichever is earlier.
Practical Compliance Steps
- Review contract terms for milestone billing and retention.
- Determine whether the contract is continuous supply of services.
- Identify the milestone completion dates and due dates.
- Pay GST on the full invoice value at the correct time, irrespective of actual receipt.
- Reconcile retention release with earlier tax paid to avoid double payment.
- Maintain milestone schedules and payment records.
Common Mistakes
- Paying GST only when payment is received, ignoring milestone completion.
- Not including retention money in the taxable value at milestone completion.
- Treating retention release as a separate taxable supply.
- Misclassifying construction contracts as one-time supply.
How Anuj Desai & Associates Can Help
We help contractors and builders determine correct time of supply for milestones and retention, manage GST payments and avoid interest and disputes.
Contact Anuj Desai & Associates
Email: office@anujdesaiassociates.com
Phone: 9619456656
Website: https://anujdesaiassociates.com
LinkedIn: linkedin.com/in/ca-anuj-desai-122547230