The rent on top of the DSCR fraction is the figure the lender is willing to count, not whatever the property might earn. On purchases it is usually the appraiser's market rent estimate; on refinances it may be the current lease, the market estimate, or the lower of the two. Short-term rental income, vacant units and side income each have their own rules, which vary by program.
Why does qualifying rental income matter?
The bottom of the DSCR fraction, the monthly payment, is mostly arithmetic once you know the loan amount, rate, taxes and insurance. The top, the rent, involves judgment. Two people can look at the same house and honestly disagree about what it should rent for. The lender settles that disagreement with a set of rules, and knowing those rules is the difference between a ratio you can trust and one that falls apart in underwriting.
This guide walks through the common sources of rent a DSCR program might use, where each one comes from, and how to estimate it before you have an appraisal in hand.
How do lenders use appraiser market rent?
On most purchases, the rent figure comes from the appraisal. Along with the value, the appraiser completes a rent schedule comparing the property with similar rentals nearby and estimates a monthly market rent. That estimate is often the number the lender uses, especially when the property is vacant or the seller's tenant is leaving.
You can approximate the appraiser's figure yourself. Find three to five rentals that are close in size, bedroom count, condition and location, and look for what they actually leased for recently rather than what they are advertised at. A local property manager can also give you a realistic range. If your estimate is well above the comparables, the appraiser's probably will not be.
How do existing leases affect a refinance?
When you refinance a property that is already rented, a signed lease becomes evidence of real income. Many programs will look at the lease, and some will also ask for proof that rent is actually being paid, such as bank deposits. A lease far above market rent may be questioned, and some programs simply use the lower of the lease and the appraiser's market rent.
Month-to-month tenancies, leases to relatives, and leases signed right before an application can all get extra scrutiny. If your tenant arrangement is unusual, mention it early so the scenario goes to programs that handle it.
How do lenders assess vacant units and two-to-four-unit properties?
On a duplex, triplex or fourplex, the rent figure is the total of all the units. If some units are leased and others are empty, lenders may combine actual leases on the occupied units with market rent estimates on the vacant ones. Some programs are more cautious with vacancies, especially on a refinance, so the rent they count can be lower than the building's full potential.
One more rule matters on small multifamily: nobody connected to the borrower can live in any unit. Living in one side of a duplex and renting the other is owner-occupied financing, which we do not arrange. A DSCR loan here is for buildings that are fully investment property.
How is short-term rental income assessed?
Short-term and vacation rentals are where programs differ the most. Some use the property's booking history over a set period. Some accept a third-party market data report that projects nightly income from comparable listings. Others ignore short-term income entirely and qualify the property on long-term market rent from the appraisal.
Whichever method applies, short-term figures are often reduced for seasonality and the higher costs of running a furnished rental. Local rules matter too: if a city or HOA limits short-term rentals, the lender may not count that income at all. Confirm what is allowed before you rely on it, and see our short-term rental DSCR page for how we approach these scenarios.
Which income may not qualify?
Some money a property brings in rarely makes it into the ratio. Program rules vary, but these items are commonly excluded or only partly counted.
- Projected rent increases you plan to make after closing
- Pet fees, parking, storage and laundry income, unless a program specifically allows them
- Income from a unit or accessory structure that is not legally permitted as a rental
- Rent from a roommate or family member living in the property, which would also break the non-owner-occupied rule
- Your personal wages, which a DSCR loan generally does not use to qualify
How can you estimate rent conservatively?
The safest approach is to run your ratio twice: once with the rent you expect and once with a lower, conservative figure. If the deal still works at the conservative number, an appraiser trimming your rent will not derail it. If it only works at the optimistic number, you know where the risk sits.
When you are ready, send us the property and your rent estimate. As a mortgage broker, we arrange and shop financing from wholesale lenders, and we can tell you which programs use leases, which lean on market rent, and how each treats short-term or vacant-unit income. Try the numbers in the DSCR calculator first if you like.
What else should you know about this topic?
Can I use short-term rental income for a DSCR loan?
Some programs count it, using booking history or a market data projection. Others only use long-term market rent. Local rules and HOA restrictions can also limit what is counted.
Does the lender use my lease or the appraisal rent?
It depends on the program and the transaction. Purchases usually rely on appraisal market rent. Refinances may use the lease, the market estimate, or the lower of the two.
How is rent counted when a unit is vacant?
Many programs use the appraiser's market rent estimate for vacant units, though some are more conservative, especially on a refinance. We check how each program treats vacancies.