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Guide

The DSCR formula is simple. Using it well is harder.

Debt service coverage ratio is one of the fastest ways to understand whether a property can support its financing. For investors, it also acts like a warning light: if coverage is thin, the deal may not be as durable as it first appears.

The DSCR formula

DSCR = net operating income / annual debt service

If a property produces $75,000 in NOI and annual debt payments total $60,000, the DSCR is 1.25x. That means the income covers the debt obligation by 25%.

Why lenders care

Lenders use DSCR to evaluate risk. The more cushion a property has between NOI and debt service, the more resilient the loan appears. Thin DSCR means a modest drop in rent or rise in expenses could create stress quickly.

Why investors should care too

Even if a deal clears the lender’s minimum threshold, a weak DSCR can still be a bad fit for the buyer. It may produce too little margin for error, especially in volatile markets or on properties with deferred maintenance.

How Dealarc helps

Dealarc lets investors see DSCR next to NOI, cash flow, and other return metrics, which is much more useful than treating it as a standalone pass-fail number.

Coverage ratios can vary based on the exact loan program and underwriting method, so buyers should always confirm formulas and thresholds with the lender they plan to use.

DSCR formula FAQ

What is the DSCR formula?

DSCR equals net operating income divided by annual debt service.

What DSCR do lenders want?

Many lenders look for around 1.20x to 1.25x or better, though standards vary.

Why can DSCR change quickly?

Because rent, vacancy, expenses, and financing all affect the ratio. A small shift in assumptions can move coverage meaningfully.

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