Zillow's mid-August 2026 rent report put single-family rents at $2,314, up 3% year-over-year — the fastest pace of growth in over a year, after a long stretch of cooling. If you underwrite deals on DSCR, that's not just a headline. Rent is the numerator in your ratio, so when it moves, your qualifying math moves with it.

Why This Number Matters More Than It Looks

DSCR loans qualify the property on one calculation: monthly rent divided by the monthly debt payment (principal, interest, taxes, insurance, and association dues where applicable). A 3% rent increase doesn't sound dramatic, but on a property carrying a DSCR near the common 1.0-1.25 minimum, it's often the difference between a deal that qualifies and one that doesn't — or between a rate that requires a larger down payment and one that doesn't.

Vacancy Is Flat Nationally — But That Number Is Hiding the Real Story

The U.S. Census Bureau's Q1 2026 Housing Vacancies and Homeownership report put the national rental vacancy rate at 7.3%, not statistically different from 7.1% a year earlier. On its own, that reads as a stable, unremarkable market. But the Census breakdown by geography tells a much more useful story for underwriting: vacancy was 8.0% in principal cities, 6.9% in suburbs, and just 5.8% outside metro areas entirely.

The takeaway isn't "vacancy is fine."
It's that where you buy is doing more work in your DSCR risk than the national average suggests. A suburban or exurban rental is underwriting against meaningfully lower structural vacancy risk than an urban core unit, even in the same metro.

What's Driving Rents Back Up

Zillow's data points to an absorption story: new multifamily supply that came online in 2023-2024 pushed rent growth down for over a year, and that supply is now being leased up. As available inventory tightens back toward normal, rents are accelerating again — Zillow's report specifically flagged this as the fastest pace of rent growth in over a year.

Running the Math on a Real Example

Take a rental carrying a $1,850 monthly PITIA payment. At the old average rent of $2,247 (roughly last year's Zillow single-family figure before this year's 3% gain), that's a DSCR of 1.21. At this year's $2,314 average, the same payment produces a DSCR of 1.25 — enough, on some programs, to move from a standard rate tier into a better one, or to reduce the down payment required to hit a 1.0 minimum on a marginal deal.

What to Do With This Before Your Next Application

  • Pull a current rent comp, not last year's — a stale comp can understate your DSCR on paper by more than this year's actual growth
  • Weight suburban and outside-MSA properties appropriately in your own risk assessment — the vacancy gap versus principal cities is real and persistent, not a one-quarter blip
  • If a deal was marginal on DSCR six months ago, it may already qualify differently today — worth re-running before assuming it still doesn't work
  • Don't assume rent growth is uniform — Zillow's national figure is an average; pull metro-level data for the specific property before finalizing your numbers

The Bottom Line

National vacancy and rent headlines move slowly and can hide a lot of local variation. For a DSCR loan, the number that actually matters is the specific property's current rent against its specific debt payment — and right now, that number is moving in investors' favor for the first time in over a year.

Run Your Own DSCR Numbers →