Ridge Street Capital built this DSCR loan calculator to help real estate investors quickly determine whether a rental property generates enough income to qualify for DSCR financing. Enter the loan terms, monthly expenses, and rental income below to calculate the debt service coverage ratio and evaluate the property’s eligibility.

How to Use the DSCR Loan Calculator

The calculator runs a complete debt service coverage analysis from four input categories: property and loan details, rate and loan terms, monthly costs, and rental income. Every output updates in real time as inputs change. Check numbers on any deal in under 60 seconds.

Step 1: Property and Loan

Two inputs define the loan structure. Every output flows from them.

• Purchase Price: The contract price paid for the property. The calculator applies the LTV to this figure to produce the loan amount.
• LTV (Loan-to-Value): The percentage of the purchase price covered by the loan. Ridge Street Capital's DSCR loans go up to 80% LTV. At 75% LTV on a $350,000 purchase, the loan amount is $262,500 and the down payment is $87,500. Moving from 80% to 75% LTV reduces the monthly payment and directly improves the DSCR ratio.

Step 2: Rate and Loan Terms

• Interest Rate: The annual rate on the DSCR loan. The calculator applies it to the loan amount to produce the monthly payment and full amortization schedule. The rate field pre-populates based on current market conditions, as DSCR loan rates are indexed to the 2-year U.S. Treasury yield and move with the benchmark.
• Payment Type: Select the loan structure that matches your financing: 30-year fixed amortizes the balance over the loan term, while interest-only carries a lower monthly payment that directly improves the DSCR on the same rent. 
  
  • 30-Year Fixed: Each monthly payment reduces the principal balance. The payment is higher than an interest-only structure, which produces a lower DSCR at the same rent level.
  • Interest Only: The monthly payment covers interest only. The loan balance does not reduce during the interest-only period. Because the payment is lower, the DSCR ratio improves on the same rent.

Step 3: Monthly Costs (PITIA)

PITIA stands for principal, interest, taxes, insurance, and association dues. Lenders calculate DSCR against the full PITIA, not the loan payment alone.

• Monthly Property Taxes: Divide the annual tax bill by 12.
• Monthly Insurance: The monthly premium for landlord or investment property insurance. Non-owner-occupied landlord policies typically run higher than a standard homeowner policy. 
• Monthly HOA / Association Dues: Enter the monthly HOA fee if the property carries one, or enter $0.

Step 4: Rental Income

• Monthly Gross Rent: The full monthly rent at 100% occupancy. For long-term rentals, use the current lease rate or the market rent supported by a rental comparables analysis. For short-term rentals, use the projected average monthly revenue, not peak-season figures. 
• Vacancy Rate: The percentage of time the property sits unoccupied. The calculator applies a vacancy discount to gross rent before computing the DSCR ratio, which reflects how most lenders underwrite rental income. A standard long-term rental assumption is 5% vacancy. Short-term rental programs typically apply a 20% to 25% discount. Setting vacancy to 0% computes DSCR against gross rent only — the most optimistic scenario.

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Reading the Outputs

The results panel updates on every input change.

• Loan Amount: The dollar figure funded at closing, based on purchase price and LTV. This is the balance on which interest accrues.
• Total Monthly PITIA: The full debt service figure the lender uses to calculate the DSCR ratio. Every cost in the Monthly Costs section adds directly to this number.
• DSCR Ratio: The single number that determines whether the property qualifies. DSCR is effective monthly rent divided by total monthly PITIA.
• Monthly Cash Flow: Net rental income after all monthly debt service costs. A positive figure means the property generates income above its obligations. Cash flow and DSCR move together — a deal at 0.95 DSCR will show a monthly deficit.
• Break-Even Rent: The minimum monthly rent at which DSCR reaches exactly 1.0. A market rent within 5% of this figure indicates limited tolerance for vacancy or any upward movement in costs.
• Target Rent (1.25x): The monthly rent required to achieve a 1.25 DSCR — the threshold between marginal and strong qualification.
• Cap Rate: Annual net operating income divided by purchase price. Cap rate measures the property's unlevered yield independent of how it is financed. A property generating a 5.5% cap rate at a 6.6% interest rate operates with negative leverage, meaning that the cost of debt exceeds the asset's unlevered return.

Interest Only vs. 30-Year Impact: The monthly payment difference between an interest-only and a 30-year amortizing structure at the same rate. On a $262,500 loan at 6.625%, the interest-only payment is approximately $1,450 and the 30-year payment is approximately $1,681 — a $231 monthly difference that shifts the DSCR ratio by roughly 0.14 points at a $2,800 rent level.

Running numbers on a deal before applying is exactly the due diligence Ridge Street Capital looks for in a borrower. If the calculator output raises questions about deal structure, loan sizing, or whether a project qualifies, the lending team is available to work through the numbers directly. Reach out before submitting a formal application.

DSCR Ratio Formula and Calculation

The DSCR ratio is calculated by dividing monthly rental income by monthly PITIA. DSCR lenders refer to this metric as the debt service coverage ratio or DSCR ratio — both terms describe the same calculation. A ratio of 1.0 means rental income exactly covers debt service. A ratio of 1.25 means rental income is 25% above what is needed to service the debt.

DSCR = Monthly Rent / Monthly PITIA

Where:

• Rent = Monthly rental income
• PITIA = Principal + Interest + Taxes + Insurance + Association dues (if applicable)

Each component of PITIA directly affects the ratio. A $300 monthly HOA, a higher insurance premium, or a rate increase all reduce the DSCR at the same rent level, which is why accurate cost inputs are the most important variable in the calculation.

Why PITIA Matters More Than the Loan Payment Alone

A common mistake when estimating DSCR is running the calculation against the principal and interest payment only. Lenders use the full monthly PITIA stack as the denominator. Every recurring cost tied to owning the property counts toward the debt service figure, not just the mortgage payment.

The distinction matters more than it appears. On a $262,500 loan at 7%, the monthly principal and interest is approximately $1,746. Add $500 in property taxes, $200 in insurance, and $300 in HOA dues, and the true PITIA is $2,746 — a 57% increase over the loan payment alone. A property renting at $3,000 per month produces a DSCR of 1.72 against the loan payment, and 1.09 against full PITIA.

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What DSCR Do You Need to Qualify for a DSCR Loan?

Most lenders use three threshold levels when evaluating a DSCR loan application. Understanding where a deal falls within that spectrum determines not just whether it qualifies, but at what pricing tier.

• ‍DSCR 1.0: Minimum Qualification Threshold

A DSCR of 1.0 means rental income exactly covers the monthly PITIA. Most non-QM DSCR lenders, including Ridge Street Capital, approve loans at this threshold. Approval at 1.0 is a standard qualification.

• ‍DSCR 1.0 to 1.2: Standard Range

A DSCR between 1.0 and 1.2 is the range in which most DSCR loan applications are approved with standard pricing. The property generates meaningfully more income than its debt obligation, which gives the lender a comfortable margin and gives the investor positive monthly cash flow. 

• ‍DSCR Above 1.2: Strongest Pricing Position

A DSCR above 1.2 generally qualifies for the strongest pricing tier. The property’s income comfortably exceeds its debt obligations, which lowers perceived risk and improves loan pricing. Ridge Street Capital offers better terms within this range. 

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How to Improve Your DSCR Before Applying

If your DSCR is below 1.0, there are several strategies you can use to improve it:

1. Increase the down payment. 

A larger down payment reduces the loan amount, which reduces the principal and interest component of PITIA. On a $350,000 purchase, moving from 80% to 75% LTV reduces the loan by $17,500. At a 7% rate on a 30-year amortizing structure, that reduction lowers the monthly payment by approximately $116 and improves the DSCR ratio by roughly 0.05 to 0.07 points at a $2,500 rent level.

2. Select an interest-only payment structure. 

An interest-only loan eliminates the principal component from the monthly payment, reducing PITIA and improving the DSCR ratio on the same property at the same rent. At a 7% rate on a $262,500 loan, switching from 30-year amortizing to interest-only reduces the monthly payment by approximately $231 and improves the DSCR ratio by roughly 0.14 points.

3. Consider an adjustable-rate mortgage. 

Most DSCR loans for investment properties are 30 YR Fixed Rate Mortgages (FRM). Adjustable rate mortgages offer a 5-year fixed term with an adjustable rate after the initial 5-year term, and have lower interest rates than 30 Year FRM. Ridge Street Capital is one of the few investment property lenders that offer ARM’s to investor clients to help lower the DSCR on rental properties. 

The tradeoff is rate exposure after the initial period. For investors planning a refinance or sale within five to seven years, the ARM structure improves the qualifying DSCR without permanently accepting the adjustment risk. The IO vs. 30-Year output in the calculator shows the payment difference this choice produces.

4. Negotiate the purchase price. 

A lower purchase price reduces the loan amount at any LTV, which reduces monthly PITIA. If the deal is borderline on DSCR, the right adjustment may be at the acquisition rather than in the financing structure. The calculator allows real-time testing of different purchase price inputs to identify the price point at which the DSCR clears the qualification threshold.

5. Lower Insurance Costs. 

Ask your insurance broker if there is anything they can do to lower your policy fee. A lower insurance policy fee will increase your DSCR.

6. Ask About a Rate Buydown. 

Ridge Street Capital allows you to pay an additional fee at closing in exchange for a lower rate. In some cases, a rate buydown will allow you to lower your DSCR without increasing your overall cash required to close.

Get a DSCR Loan from Ridge Street Capital

Ridge Street Capital is a private lender providing DSCR loans across 35 states for long-term rentals, Airbnb loans, and multifamily properties up to 10 units. In 2026, Real Estate Business Review recognized Ridge Street Capital as DSCR Lender of the Year for its specialization in investor financing. Loans can close in as few as 21 to 25 days, with term sheets issued within 2 business hours of application.

DSCR Loan Calculator FAQs

How do I calculate DSCR for a multi-unit property?

The formula is the same regardless of unit count: total monthly rental income divided by total monthly PITIA. For a 4-unit property generating $800 per unit, total monthly income is $3,200. Enter the combined monthly rent from all units in the gross rent field. Ridge Street Capital finances 1 to 4 unit residential properties and multifamily properties from 5 to 10 units under the DSCR program.

Can a DSCR loan be held in an LLC?

Yes. DSCR loans are business-purpose loans and can be originated in the name of an LLC or other legal entity. The LLC is the borrower of record, and title vests in the entity at closing. Personal income verification is not required, but members holding 20% or more ownership interest sign a personal guarantee. For investors who want liability protection in place from day one, the DSCR structure makes LLC ownership possible without a post-closing title transfer. For a full breakdown of how DSCR loans work under an LLC, including entity documents required at closing and guarantor requirements, see the DSCR loan for LLC guide.

Can I use the DSCR calculator for a short-term rental property?

Yes. For short-term rentals, enter the projected average monthly revenue in the gross rent field. Ridge Street Capital underwrites short-term rental DSCR loans using AirDNA market projections filtered to comparable properties by bedroom count, unit type, and local market. The calculator provides a working estimate, but the lender's income evaluation will use AirDNA data rather than the borrower's own projection.

How does a DSCR loan compare to a conventional investment property mortgage?

The core difference is the qualification method. Conventional investment property loans require W-2 income, tax returns, and a personal debt-to-income calculation. DSCR loans qualify on the property's rental income only, with no personal income documentation required. Conventional programs also carry a Fannie Mae property count limit of 10 financed properties and require title in personal name. DSCR loans have no property count limit and support LLC ownership. The tradeoff is rate: DSCR loans typically run 0.5% to 1.0% higher than conventional investment property rates. For a full comparison, see the DSCR vs. conventional loan guide.

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