The bill that sat for four months
A contracts manager at a highway contractor in Maharashtra submitted an RA bill in August. By December, the interim payment certificate had still not been issued. The contractor had followed up twice by phone. No written escalation had been sent.
The employer's position, when finally engaged: the bill had measurement issues that needed resolution. The contractor had no record of being told this. The four months of delay, and the financing cost it carried, disappeared into the project's final account.
This happens regularly on NHAI projects. Not because contractors do not know their rights, but because the process of enforcing them is slow and unfamiliar.
What GCC Clause 43 actually says
Under the NHAI GCC, the engineer must issue an Interim Payment Certificate (IPC) within 28 days of receiving a payment application. Once the IPC is issued, NHAI must make payment within 28 days of the certificate date.
That is a total of 56 days from bill submission to payment receipt, per the contract. In practice, the cycle runs longer. But the 56-day clock is the legal baseline, and every day beyond it is a potential financing cost claim.
Clause 43 also requires the engineer to notify the contractor in writing if the payment application is not accepted in full, with reasons. A blanket hold without written communication is itself a contract breach.
The 7-day objection window
Most contractors are unaware that if the engineer fails to issue an IPC within 28 days and fails to give written reasons for the delay, the contractor can issue a 7-day notice of the engineer's failure under GCC Clause 20. This notice is the first step in the dispute resolution process.
Sending that notice requires a formal letter. It has to go to the right person, reference the right clause, and be sent within the right window. Most contractors do not send it. Not because they disagree with the approach, but because they do not have a letter ready within 7 days.
The financing cost that contractors rarely claim
NHAI GCC Clause 43.7 entitles a contractor to financing charges on delayed payment. The rate is typically linked to the State Bank of India's prime lending rate plus a margin, compounded monthly.
On a ₹200 crore project with six months of payment delay on RA bills averaging ₹15 crore each, the financing cost claim can exceed ₹3 crore. Most contractors never calculate it, let alone claim it.
The reason: the claim requires a formal letter. The letter requires knowing the exact delay period, the applicable rate, and the correct clause reference. None of this is hard to calculate, but it takes time that a busy contracts manager does not have.
Tracking deadlines before they expire
The practical challenge is not knowing the rules. It is tracking 8 to 12 active RA bills across 3 to 5 packages, each at a different stage of the 56-day cycle, while managing site operations.
A payment deadline calculator can tell you exactly when each IPC should arrive and when payment should follow. But the more important tool is a system that alerts you before the deadline expires, not after, so there is time to send the 7-day notice while it still counts.
What a correct follow-up letter looks like
When a payment deadline is missed, the contractor's written notice should:
- State the date the payment application was submitted
- State the applicable deadline under GCC Clause 43
- Note that no IPC has been received and no written objection has been communicated
- Give notice of the contractor's intention to invoke Clause 20 if the IPC is not received within 7 days
- Reserve all rights to claim financing charges under Clause 43.7
That letter, sent promptly, changes the dynamics of the conversation. It signals that the contractor is tracking the contract, not just the site.