According to the agency, HAM was introduced to rejuvenate the road sector and lessen the equity burden on the already stressed developers.
"Of the 27 HAM projects bid up to December 2016, finances have been tied up for 60 per cent. Lenders wary of funding HAM projects have gradually acclimatised to the contract structure especially the equity light model," Ind-Ra said.
It noted that though case specific impediments such as aggressive bids and stressed sponsors among others continue to delay financial closure, low equity in HAM projects will weigh on funding decisions.
In case of HAM projects, construction funding accounts for 40 per cent of the total cost is released by the authority in five tranches linked to the milestones, while the balance (60 per cent) is arranged by the concessionaire.
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"The project is likely to have sufficient funds because equity injections, mobilisation advances, debt drawdowns and timely grants would hasten the completion subject to the full availability of the land," Ind-Ra said.
"Amid lenders' cautious approach to infrastructure, a delay of about six months is usual and projects battling financial closure could be due to case-specific issues.
"Simultaneously, sponsor's experience, capabilities in executing projects on a timely basis and debt service coverage ratios are crucial in taking funding decisions," it added.