Every DSCR loan calculation starts with one input, the property’s monthly rental income. That figure gets compared against the payment to produce the ratio that drives the loan decision. For a full explanation of that comparison, read the article on how DSCR is calculated. This article focuses solely on where the rent figure itself comes from and how lenders confirm it is accurate.
Investors are sometimes surprised to learn that the rent used in underwriting is not always the rent the borrower expects to charge. Lenders rely on a small set of documented sources, and the source used depends on the property’s occupancy status and rental strategy at the time of the loan.
Why the Rental Income Number Matters
Because DSCR loans qualify a property based on its own income instead of the borrower’s personal earnings, the rental figure carries significant weight in the underwriting decision. An inflated or unsupported rent estimate would undermine the entire purpose of the ratio, so lenders require the income to come from a documented, third-party source instead of a borrower’s own projection.
Form 1007, the Appraiser's Rent Schedule
For a single-family home, a lender typically orders a Form 1007 as part of the appraisal. The appraiser researches comparable rental properties in the immediate area, adjusts for differences such as square footage, bedroom count, and condition, and arrives at an estimated monthly market rent for the subject property. For a two-to-four-unit property, the equivalent form is a Form 1025, which repeats this process for each unit separately.
This appraisal-based rent schedule is the most commonly used source for a purchase transaction where the property is vacant or where the current lease does not reflect current market conditions. The appraiser’s opinion is grounded in actual comparable listings, which gives lenders a documented, defensible number instead of a guess.
Automated Valuation Models for Rent
Some lenders allow an automated rent estimate in place of a full appraiser rent schedule, particularly on lower-risk transactions or refinances where a recent appraisal already exists for value purposes. These automated tools pull from large rental listing datasets and generate an estimated monthly rent for the address based on nearby comparable properties.
An automated estimate is faster and less expensive to produce than a full appraisal, but it carries more uncertainty since no person has physically evaluated the property’s specific condition or upgrades. Lenders that accept this method usually reserve it for properties with strong, consistent rental markets and straightforward property characteristics.
An Existing Lease Agreement
When a property is already occupied by a tenant, the signed lease agreement often becomes part of the income picture. Lenders typically compare the lease amount against the appraiser’s or the automated model’s market rent estimate and use whichever approach the specific loan program requires, which is often the lower of the two figures unless the program allows using the higher one under certain conditions.
A lease also documents the tenant’s occupancy, the rent due date, and the lease term remaining, all of which matter for a refinance where the lender needs to confirm the property is producing income under a binding agreement instead of an informal arrangement.
Short-Term Rental Income Documentation
A short-term rental does not have a single lease to reference, so lenders use a different approach entirely. For a property with an existing rental history, lenders typically request twelve months of statements from the booking platform showing actual income collected, then average that income to smooth out seasonal swings.
For a property with no operating history, such as a new purchase that has never been rented, lenders may instead use a projected income report from a third-party short-term rental data provider, which estimates likely nightly rates and occupancy based on comparable properties in the same market. Because this income has no track record yet, some lenders apply a more conservative adjustment to the projected figure before using it in the DSCR calculation.
Documentation Borrowers Provide
While the final rent figure comes from a third-party source, borrowers still play a role in supplying the underlying paperwork that supports the calculation. Common items requested include the following.
- A copy of the current signed lease agreement, if the property is occupied
- Proof of the most recent rent payment, such as a bank deposit record
- Access for the appraiser to inspect the interior and exterior of the property
- Booking platform statements covering the trailing twelve months, for short-term rentals with operating history
- A property management agreement, when a third party manages bookings or tenant relations
Gathering these items ahead of time speeds up the underwriting timeline, since delays in scheduling an appraisal or locating a lease agreement are among the more common reasons a rental income review takes longer than expected.
How a Refinance Changes the Process
A refinance sometimes allows for a different income verification path than a purchase. If the property already has a recent appraisal on record from a prior transaction, some lenders will rely on that existing rent schedule instead of ordering a brand new one, provided it falls within an acceptable age window set by the loan program. A property with a long-standing tenant in place may also be able to use the existing lease as the primary income source, with a new appraisal ordered mainly to confirm current value instead of to re-establish rent.
This flexibility does not apply universally, and a lender will always order fresh documentation when the existing records are outdated, incomplete, or inconsistent with current market conditions.
Which Income Source Applies to Which Situation
The table below summarizes the typical source used across common property situations. Actual requirements vary by lender and by specific loan program.
| Property Situation | Typical Rental Income Source |
|---|---|
| Vacant single-family purchase | Appraiser rent schedule (Form 1007) |
| Vacant 2 to 4 unit purchase | Appraiser rent schedule (Form 1025) |
| Tenant-occupied purchase or refinance | Signed lease compared against appraiser rent schedule |
| Refinance with recent appraisal on record | Automated rent estimate in some cases |
| Short-term rental with rental history | Trailing 12-month platform income statements |
| Short-term rental with no history | Third-party projected income report |
How Lenders Handle Conflicting Rent Estimates
It is common for the appraiser’s rent estimate, the actual lease amount, and an automated estimate to come out slightly different from each other, since each method uses a different research approach. When this happens, most loan programs default to a conservative rule, typically using the lower of the available figures instead of the higher one, to avoid overstating the property’s income capacity.
An investor who believes a documented rent source understates the property’s realistic earning potential can sometimes request a second opinion or provide additional comparable rental data for the appraiser to consider, though the final figure used in underwriting still needs to come from an approved, documented source instead of the borrower’s own estimate.
If the rental income documentation is missing, incomplete, or inconsistent, this can affect the loan decision well beyond the DSCR number itself. What can disqualify a DSCR loan application covers this and other underwriting issues in more detail.
Common Questions
- Can a borrower submit their own rent estimate instead of using a documented source? No. Lenders require the rental income figure to come from an appraiser, an approved automated valuation source, a signed lease, or documented short-term rental platform statements, not from the borrower’s own projection.
- Does the appraiser go inside the unit when preparing a rent schedule? Yes, in most cases. A full appraisal that includes a rent schedule typically involves an interior and exterior inspection of the property, since condition and finishes affect the comparable rent analysis.
- How current does the rental income data need to be? Appraiser rent schedules and automated estimates are generally expected to reflect current market conditions at the time of the loan, and lenders will not accept outdated data from a prior appraisal or an expired lease without an update.
- Can the market rent figure end up higher than the actual lease amount? Yes. This happens when a property has been under a below-market lease for some time. Depending on the loan program, the lender may still use the actual lease amount instead of the higher market estimate until the lease is renewed or the tenant vacates.
