How lenders size debt on a project: DSCR in plain words

A lender sizes a project loan from the cash the project will produce. The measure it uses is the debt service coverage ratio, or DSCR.

The question is how much debt this cash flow can repay, with room to spare.

What the ratio says

DSCR is cash available for debt service divided by debt service, measured for one period. Cash available for debt service is revenue less operating costs and tax, before any payment to the lender or the owners. Debt service is the interest and principal due in that period.

An illustrative year: a plant produces 130 of cash and owes 100 in interest and principal. Its DSCR is 1.3x, and the extra 30 is the cushion. At 1.0x the cash exactly covers the payment and nothing is left. Below 1.0x the project cannot pay from its own cash that year.

From ratio to loan size

A lender sets a minimum ratio it wants to see in every period. The level depends on the lender and on how predictable the cash flow is. A fixed-price contract with a strong buyer supports a lower minimum than revenue that moves with the market.

Sizing then runs in three steps. First, project the cash available for debt service for each period of the loan. Second, divide each period's cash by the minimum ratio, which gives the largest payment the project can make in that period. Third, work out the loan whose interest and principal fit inside those payments. That loan is the debt capacity.

Four inputs move the answer: the cash flow, the minimum ratio, the interest rate and the tenor. A longer tenor spreads principal over more periods and raises capacity, provided the contracts and the asset last at least as long.

Why the downside case decides

Lenders rarely size on the sponsor's base case alone. They lower the output, raise the costs or delay the start, and run the ratio again. If the downside case shows periods below 1.0x, the loan is too large or the structure needs support. A common form of support is a reserve account that holds several months of debt service.

Repayments can also be shaped to the cash flow. If cash is lower in the early years, principal can start small and grow. The ratio then stays level across the loan, which lenders prefer to a schedule with a few thin years.

What a sponsor can do

Build the cash-flow model from the contracts before discussing loan size. Test the lower cases yourself. Find the weakest period, then fix its cause or size the debt to it. A lender will look for that period early.

This article is general information from RupyAI. It is not investment, legal or tax advice, and it does not describe any specific project. Questions and corrections: manish@rupy.ai