1.20x is the number that decides most rental-property loan files. It is the minimum debt service coverage ratio most lenders require before they will fund an investment property, and it is not a formality — a file that lands at 1.14x is treated very differently from one that lands at 1.21x, even when the properties behind them look identical.

This guide explains the ratio from the ground up using the five numbers that define it: 1.00, 1.20 to 1.25, 25%, 75 to 80%, and 0.75. Then it runs the arithmetic on a four-unit property so you can see exactly how a lender turns rent into a verdict. If you want the practical version of how DSCR loans work, the math below is the whole game.

1.00x: The Break-Even Line

The debt service coverage ratio compares a property's income to its debt payments:

DSCR = qualifying rental income ÷ total monthly debt service

Total debt service is the PITIA figure — principal, interest, property taxes, insurance, and HOA dues where they apply. Qualifying rental income is not raw rent; more on that in a moment.

At 1.00x, the property earns exactly what it costs to carry. Every dollar of rent is consumed by the mortgage and its related costs, and a single vacancy month means the owner is feeding the property out of pocket. Lenders treat 1.00x as the floor of survivability, not a target.

Below 1.00x, the property runs negative on a cash-flow basis at underwriting. Few standard programs approve files under that line, and the ones that do — covered in the 0.75x section below — charge for the privilege.

1.20x–1.25x: The Threshold Most Lenders Use

The common approval threshold for a standard DSCR loan is 1.20x, with many lenders at 1.25x. That twenty to twenty-five percent cushion is the lender's protection against the things underwriting cannot see: a tenant turning over, a tax reassessment, an insurance premium spiking, a water heater failing in year two.

Two practical consequences follow. First, pricing commonly improves as the ratio rises — a file at 1.35x will often see better terms than one scraping past 1.20x, because the lender's risk is visibly lower. Second, the gap between 1.15x and 1.25x is not rounding. It is the difference between a declined file and an approved one, and it can usually be closed with a larger down payment, a lower purchase price, or rent verified at the high end of the market.

25%: The Expense Factor That Converts Rent Into Qualifying Income

Lenders do not qualify a property on gross rent. They apply an expense factor — commonly 20% to 25% for a standard rental, higher for property types with heavier operating costs — representing vacancy, maintenance, and management. A building that collects $4,800 a month is typically underwritten at $3,600.

Some lenders will instead use net operating income from the property's actual financials, and some will accept whichever figure is higher. The appraiser's market rent opinion matters here too: if the current lease is below market, the lender may qualify the property at market rent, which can be the difference between a 1.1x file and a 1.25x file. Rent that is "almost there" is worth testing against the expense haircut before you assume the deal works.

75%–80%: How Much of the Property Lenders Will Finance

DSCR leverage commonly runs up to 75% to 80% of the purchase price for strong files, meaning a 20% to 25% down payment. Cash-out refinances commonly cap lower, around 70% to 75%. These ceilings matter because leverage and coverage pull against each other: every additional dollar borrowed raises the debt service and pushes the ratio down.

That interaction is why the same property can be approvable at 25% down and unapprovable at 20% — not because the borrower changed, but because the debt service grew. When a file misses the ratio, adjusting the loan amount is usually the fastest fix available. For a sense of how these loans sit within the wider property market, see commercial real estate loans.

0.75x: No-Ratio Programs and What They Cost

A subset of lenders offers "no ratio" or low-DSCR programs that approve below 1.00x — commonly down to around 0.75x. These exist for specific situations: appreciation plays in markets where rents lag prices, short-term rentals with seasonal income, or buildings whose current leases sit below market.

The trade-offs are real. Expect a larger down payment, commonly 30% or more, larger reserve requirements, and pricing above standard DSCR levels. A no-ratio program is a tool, not a shortcut — it makes sense when the property's upside justifies the extra cost, and it is a poor fit for a deal that only barely works on paper.

The Math in Practice: A Four-Unit Example

Take a four-plex priced at $450,000 with gross rents of $4,800 a month — $57,600 a year. The lender applies a 25% expense factor, so qualifying income is $3,600 a month.

At 20% down: the loan is $360,000. At an assumed note rate of 8.25% on a 30-year term — an illustration, not a quote — principal and interest come to roughly $2,704 a month. Add $450 for taxes and insurance and the PITIA is about $3,154. The ratio: $3,600 ÷ $3,154 = 1.14x. That is below the common 1.20x threshold, so this structure gets declined or repriced as-is.

At 25% down: the loan drops to $337,500. Principal and interest fall to roughly $2,536, and the PITIA becomes about $2,986. The ratio: $3,600 ÷ $2,986 = 1.21x. Approved.

The spread between those outcomes is $22,500 of additional down payment. There are two other paths to the same result. If rents were $5,050 a month instead of $4,800 — about $250 more — the 20%-down structure would also clear 1.20x. Or the price could be negotiated down until the loan amount shrinks enough to fit.

One caution: taxes and insurance are the numbers most often underestimated at this stage. A reassessment after purchase can add hundreds per month, and the ratio you qualify on is the ratio you live with. For investors weighing this structure against the alternatives, real estate investment loans covers the broader menu.

Here is that caution in numbers, using the 25%-down case: if taxes rise by $150 a month after reassessment, the PITIA moves from $2,986 to about $3,136 and the ratio slips from 1.21x to roughly 1.15x — back under the common line. On a $3,600 income base, every $100 of added monthly cost moves the ratio by about 0.04x, which is why seasoned investors underwrite with a cushion rather than targeting the threshold exactly.

The Three Levers, and Which One to Pull

When a property misses the ratio, there are exactly three levers: raise income (market-rent method, better leases), lower debt service (more down, lower price, paying down the balance), or change the program and accept its trade-offs. Everything else is noise. Run the numbers you control — rent, price, down payment — through the formula before you write an offer, and check our FAQ for the common edge cases.

Five minutes of arithmetic now beats discovering a 1.14x file a month into escrow. Send the rent roll and target price to Tesni, LLC, and our team will pressure-test the ratio with you before you commit to anything.