The Exact DSCR Formula for a Three-Unit Property
The Debt Service Coverage Ratio (DSCR) is a simple yet powerful formula lenders use to determine if an investment property’s income can cover its debt obligations. For a multi-unit property like a triplex, the key is accurately calculating the total income. The formula itself remains consistent:
DSCR = Gross Monthly Rental Income / Monthly PITIA
Let's break down each component for a three-unit building.
Gross Monthly Rental Income: This is the sum of the rent collected from all three units, plus any other consistent, verifiable income the property generates.
Gross Income = (Unit 1 Rent + Unit 2 Rent + Unit 3 Rent + Other Ancillary Income)
Monthly PITIA: This represents the total monthly housing expense.
PITIA = Principal + Interest + Taxes + Insurance + Association Dues (if any)
Example Calculation for a Miami Triplex
Imagine you're buying a triplex in Miami's Little Havana neighborhood. The numbers might look like this:
- Unit 1 Rent: $2,400/month
- Unit 2 Rent: $2,350/month
- Unit 3 Rent: $2,250/month
- Total Gross Monthly Rental Income = $7,000
Now, let's calculate the estimated monthly PITIA:
- Principal & Interest (P&I): $4,100
- Property Taxes (T): $1,100
- Homeowner's Insurance (I): $600
- HOA/Association Dues (A): $0
- Total Monthly PITIA = $5,800
Using the formula:
DSCR = $7,000 / $5,800 = 1.206
This property has a DSCR of 1.20, which meets the standard requirement for most investor loan programs.
How Lenders Verify Rental Income for All Three Units
Lenders need undeniable proof of the income your property generates. They don’t just take your word for it. The method of verification depends on whether the units are currently occupied.
Using Current Lease Agreements for Occupied Units
For any unit with a tenant, lenders require a copy of the fully executed lease agreement. This is the gold standard for income verification. Underwriters will scrutinize the lease for key details:
- Lease Term: They confirm the start and end dates to ensure it’s an active, long-term lease (usually 12 months).
- Rental Amount: The monthly rent specified in the lease is the number they will use in their calculation.
- Tenant and Landlord Signatures: The document must be properly signed and dated by all parties.
If you're buying a triplex in a competitive area like Orlando, having all three units occupied with solid leases makes your loan application significantly stronger.
Using Market Rents for Vacant Units
What if one or more units are vacant at the time of purchase? Lenders rely on a professional appraiser to determine the property's income potential. For a 2-4 unit property, the appraiser completes a Small Residential Income Property Appraisal Report (Form 1025).
This report includes a 'Comparable Rent Schedule' where the appraiser analyzes similar rental properties in the immediate area to establish a fair market rent for each unit. For example, if your Orlando triplex near Lake Nona has a vacant unit, the appraiser will find comparable 2-bedroom units in that specific neighborhood to justify a projected rent of, say, $2,100 per month.
Important Note: Lenders will almost always use the lesser of the current lease amount or the appraiser's market rent opinion. If your tenant is paying $2,500 but the appraiser determines market rent is $2,300, the lender will use $2,300 for the DSCR calculation.
Handling High Florida Property Taxes and Insurance in the Calculation
A common mistake investors make is using the seller's current tax and insurance payments in their calculations. Lenders will not use these figures. They calculate PITIA based on the new owner's projected costs, which are often higher, especially in Florida.
Property Tax Estimates
Lenders will use the property's new sale price to estimate future taxes. The title company or lender will pull the latest property tax assessment and apply the local millage rate from the county (e.g., Miami-Dade County or Orange County). This annual estimate is then divided by 12 to get the monthly tax figure for the 'T' in PITIA. This ensures the calculation reflects the post-sale tax burden, which is almost always higher than the seller's.
Sourcing a New Insurance Binder
Florida's insurance market is notoriously expensive due to hurricane risk. You cannot use the seller's policy. As part of the loan process, you must obtain a new homeowner's insurance quote for the triplex. This quote, or 'binder', will state the annual premium. The lender will divide this annual premium by 12 to determine the monthly insurance cost for the 'I' in PITIA. Getting this quote early in the process is critical, as a high premium can easily make or break a DSCR calculation.
Can I Include Income from Laundry or Parking Spaces?
Yes, in some cases, you can include ancillary income to boost your gross rental income and improve your DSCR. However, this income must be stable, predictable, and well-documented. Lenders are more skeptical of ancillary income than rent from leases.
Examples of potentially includable income include:
- Coin-Operated Laundry Facilities: If the building has a laundry room, you'll need to show a history of collections.
- Rented Parking Spaces or Garages: If tenants pay a separate, documented fee for parking.
- Vending Machines or Other Service Income: Must have a clear paper trail.
To get this income approved, you will typically need to provide at least a 12-month history of deposits into a business bank account, clearly showing the consistent revenue from these sources. (The data, information, or policy mentioned here may vary over time.) An underwriter will not approve undocumented cash income.
What Is a Minimum Acceptable DSCR for a Triplex?
Lenders want to see a financial cushion. They need to know that even with minor vacancies or unexpected repairs, the property can still cover its mortgage payments. For this reason, the industry standard minimum DSCR is 1.20.
- DSCR of 1.20: This means the property generates 20% more income than its expenses. This is the target for most lenders and offers the best rates and terms. (The data, information, or policy mentioned here may vary over time.)
- DSCR of 1.10 to 1.19: Some lenders may approve loans in this range, potentially with slightly less favorable terms.
- DSCR of 1.00: This indicates the property breaks even. While some niche lenders offer 1.00 DSCR loans, they are rare and often come with higher interest rates and require a larger down payment.
A DSCR below 1.00 means the property's income does not cover its debt, and the loan will not be approved.
How This Calculation Differs from a Standard Single-Family Rental
While the core formula is the same, calculating DSCR for a triplex differs from a single-family rental (SFR) in a few key ways.
Income Aggregation and Diversification
The most significant difference is the income stream. An SFR has one source of rental income. If it's vacant, the income is zero. A triplex has three separate income streams. If one unit is vacant, you still have income from the other two. This diversification reduces risk, which lenders view favorably. Aggregating rent from three units provides a much higher gross income figure, making it easier to cover the PITIA for a more expensive property.
Expense and Appraisal Complexity
On the flip side, expenses are more complex. Insurance for a three-unit building is higher than for an SFR. Maintenance and repair costs are multiplied across three households. The appraisal process is also more involved, requiring the more detailed Form 1025 instead of the standard appraisal report used for single-family homes, making it more costly.
What Documents Do I Need to Prove the Income Streams?
To secure a DSCR loan for a triplex, you need to be organized. Having your documentation ready will streamline the underwriting process. Here is a checklist of essential items:
- Fully Executed Purchase Contract: The agreement to buy the property.
- Copies of All Current Lease Agreements: For each of the three occupied units.
- Recent Bank Statements or a Rent Roll: To prove tenants are current on payments.
- Small Residential Income Property Appraisal Report (Form 1025): This will be ordered by the lender and will provide the market rent opinion for all units.
- New Insurance Quote/Binder: A formal quote from an insurance provider for the new policy.
- Property Tax Estimate: Provided by the lender or title company.
- Documentation for Ancillary Income: If applicable, at least 12 months of bank statements showing these deposits. If you're analyzing a triplex in Miami or Orlando and need to ensure your DSCR calculation is accurate, connect with a mortgage strategist who specializes in investor loans. They can help you structure the deal to meet lender requirements and secure the best financing for your next investment.
Ready to see how your investment property numbers stack up? Get a clear picture of your financing options and see if you qualify. Apply now to get started.
Author Bio
David Ghazaryan is the expert mortgage strategist and founder behind iQRATE Mortgages. With a mission to fund home loans that traditional banks won't touch, David specializes in helping clients with unique financial situations, including those recovering from foreclosure or bankruptcy. He expertly crafts smart, strategic, and stress-free mortgages by leveraging a vast network of over 100 lenders to secure competitive rates for investors and homebuyers alike. Praised for exceptional customer service, David has helped hundreds of families with a 97% satisfaction rate, guiding them to the mortgage they deserve.
References
Fannie Mae: Small Residential Income Property Appraisal Report (Form 1025)
Freddie Mac: Rental Income from Investment Properties
Consumer Financial Protection Bureau: The Closing Disclosure
