What is DSCR and how do you track it per property from your books?

DSCR — debt service coverage ratio — is a property's net operating income divided by its debt payments, and it's the first number a DSCR lender computes when you ask for money. A ratio of 1.25 means the property earns a quarter more than it owes the bank. You track it from your books by keeping income and expenses tagged per property, so NOI falls straight out of the P&L — no spreadsheet reconstruction the week a lender asks.

Most investors meet DSCR for the first time inside a loan application, computed by someone else from documents they scrambled to produce. The investors who move fastest keep the inputs live in their books all year.

The formula, without the mystery

DSCR = Net operating income ÷ debt service.

• Net operating income (NOI): the property's rental income minus operating expenses — taxes, insurance, repairs, management, utilities. Mortgage payments are *not* operating expenses, and neither are depreciation or capital improvements.
• Debt service: the property's actual loan payments, principal plus interest.

A DSCR of 1.0 means break-even. Most lenders want 1.20–1.25 or better; above that, pricing improves.

Why this lives or dies in the bookkeeping

Every input is a bookkeeping artifact. If all your properties share one undivided P&L, NOI per property doesn't exist — that's the class-per-property discipline. If loan payments are booked whole to expense instead of split principal-and-interest, both NOI and debt service are wrong at once. And one-time events — a payoff, a lump principal paydown, an insurance settlement — will distort the ratio unless the books keep them separate from the recurring picture. The DSCR a lender believes is the *recurring* one: steady income against steady debt service.

Get those three habits right and DSCR stops being a fire drill. It's a report you can run any month — and a dashboard number you can watch move when rents change or a refinance closes.

What the lender will actually ask for

Rent rolls, leases, and the property-level P&L — then they'll compute DSCR their own way, with their own haircuts (vacancy factors, management assumptions even if self-managed). Books that already show per-property NOI cleanly don't just speed this up; they leave less room for a conservative analyst to fill gaps with unfavorable assumptions. The rest of the refinance paper trail is covered in lender-ready books.

FAQ

What counts as debt service — the whole payment or just interest?

The whole scheduled payment, principal and interest. (Escrow for taxes and insurance is excluded from debt service, but those costs count inside operating expenses.) This is the opposite of the P&L rule, where only interest is an expense — one more reason payments must be split correctly in the books.

Is DSCR calculated per property or across the portfolio?

Both get used. A DSCR loan on one property looks at that property; a portfolio or blanket loan looks at the pool. Books that produce per-property numbers can always roll up; a blended-only P&L can't be un-blended on demand.

My property runs seasonal — what period should DSCR cover?

Lenders typically use trailing twelve months precisely to smooth seasonality. Clean monthly books make the trailing-twelve view a report filter instead of a project.

What's the fastest way to improve a weak DSCR?

First make sure it's *actually* weak: mis-booked capital improvements, unsplit loan payments, and one-time costs sitting in operating expenses all understate NOI. We regularly see a property clear a lender's threshold on corrected books alone — before any rent raise or refinance restructuring.

If a lender conversation is coming and you don't know your numbers yet, book a discovery call — per-property DSCR inputs are a byproduct of books done right.