Here is a scenario that plays out constantly. You find a property, run the coverage calculation, and it comes out at 1.22. Comfortable. You submit, and underwriting comes back at 1.04 — barely clearing, and priced worse than you expected.
Nothing was wrong with your arithmetic. The lender simply used a different rent figure than you did, and that difference sits in a document most investors never think about: the rent schedule attached to the appraisal.
Two Different Rent Numbers
When you calculate DSCR yourself, you almost certainly use the rent you know — the signed lease, or what comparable units are actually renting for based on your own research.
When a lender calculates it, they typically rely on the appraiser's opinion of market rent, documented on a rent schedule form (commonly Form 1007 for single-family). The appraiser reaches that figure independently, using rental comparables they select.
These two numbers often differ, and when they do, the appraiser's figure usually governs. That is the entire source of the surprise.
Why the Appraiser's Number Often Comes In Lower
Several structural reasons push appraised market rent below what an investor expects:
- Comparable selection. The appraiser picks rental comps. If they select older or less updated units, or draw from a wider geographic radius than you would, the resulting figure lands lower.
- Conservatism. Appraisers are producing a defensible opinion, not an optimistic one. Where a range exists, the number tends toward the middle or lower end.
- Renovation timing. If you are buying a property you intend to improve, the appraiser values it as it exists today, not as it will rent after work. Your projected post-renovation rent is not what gets used.
- Data lag. Rental comps reflect leases signed in the recent past. In a rising market, that trails current asking rents.
When Your Actual Lease Counts
This is the question worth asking every lender before you apply, because policies differ: if the property is already leased, will you use the actual lease or the appraiser's market rent?
Practices vary. Some lenders use the lower of the two, which protects them if a lease is above market. Some will use a documented lease when it is supported by payment history. Some default to the appraised figure regardless. For short-term rentals the question gets more complicated still, since many lenders substitute long-term market rent for actual booking revenue entirely.
None of these approaches is unreasonable from a lender's perspective. But they produce materially different qualifying numbers, which is why assuming rather than asking is expensive.
What You Can Actually Do
Ask before you apply. One question — "which rent figure will underwriting use?" — tells you whether to model your lease or a conservative market estimate. This costs nothing and prevents the surprise entirely.
Underwrite conservatively yourself. Run your own calculation using a rent figure below what you expect. If the deal only works at your optimistic number, it is a fragile deal regardless of which figure the lender uses. Our DSCR calculator makes it easy to test several rent levels quickly.
Document what you have. If the property is leased and performing, have signed leases and payment history ready. A lender who is willing to consider actual rent needs the documentation to do it.
Understand the appeal process. If an appraiser's rent opinion appears clearly out of line, most lenders have a reconsideration process. It typically requires you to supply better comparable data rather than simply disagreeing — specific properties, specific rents, genuinely comparable units.
Have a fallback structure. If the ratio lands lower than planned, more down payment or an interest-only structure can pull it back above the floor. Knowing your fallback before the appraisal comes back keeps a deal alive that would otherwise stall.
The Larger Point
This issue is a specific instance of a general one: the DSCR you calculate and the DSCR a lender calculates are two different numbers arrived at by two different methods. Rent is the most common source of divergence, but taxes, insurance, and association dues can also come in above your estimates — each pushing the ratio down.
Investors who are rarely surprised are the ones who model conservatively and confirm methodology before applying. It is unglamorous work that prevents most of the frustration in this process.
Where We Fit
We would rather have the rent conversation with you before an appraisal than explain a disappointing number afterward. If a property is leased and performing, tell us that up front and we will tell you how it factors in.
That is generally how we work — talking through the file before it becomes a problem rather than after. We finance DSCR rental loans, bridge financing, fix-and-flip projects, and multi-family property.
If your ratio came back lower than expected somewhere else and you want a second read on the file, send it over. Related reading: our term sheet guide, what a decline usually means, and the DSCR lender comparison guide.