Among everything reviewed in an SBA or bank loan application, Debt Service Coverage Ratio (DSCR) is frequently the single number underwriters check first — before revenue trends, before collateral, before the business plan narrative. It's a direct measure of whether the business generates enough cash flow to cover its debt obligations, which is the core question any lender is actually trying to answer.
The formula
DSCR is calculated as net operating income divided by total debt service (the sum of all principal and interest payments due in a period). A DSCR of 1.0 means the business generates exactly enough income to cover its debt payments with nothing left over — which is not what lenders want to see, since it implies zero cushion for a slow month.
What counts as a strong DSCR
Most SBA lenders look for a DSCR of at least 1.15 to 1.25, with many preferring 1.25 or higher for approval. A DSCR below that range doesn't automatically disqualify an application, but it signals thin cash flow cushion relative to the proposed debt load, and may require additional collateral, a co-signer, or a reduced loan amount to offset the risk.
Why this needs to be calculated for the proposed loan, not just current debt
The DSCR that matters in a loan application isn't the business's current ratio against existing debt — it's the projected ratio including the new loan's payments added to the mix. A healthy current DSCR can look very different once the new debt service is layered in, which is exactly why this number needs to be modeled forward, not just calculated on historical numbers.
Why a reconciled, consistent application matters as much as the DSCR itself
Numbers that don't reconcile across the different documents in a loan packet — the projections, the personal financial statement, the debt schedule — raise questions that slow down or derail an underwriting decision, independent of how strong the DSCR itself looks. A packet where every number ties together cleanly is processed with far less friction than one an underwriter has to chase down inconsistencies in.