The Real CRE Credit Risk Is the Asset Everyone Called Safe

What Happened

For two years the commercial real estate credit conversation has been about office. The more important story now is multifamily — the asset class underwriting treated as gilt-edged. Agency data show it deteriorating to levels not seen since the housing bust. Fannie Mae’s multifamily serious delinquency rate stood at 0.58% in May 2026, near its 2010 peak of roughly 0.79% and well above the 0.44% of two years earlier; Freddie Mac’s has moved above its Great-Recession peak. The MBA’s Q2 2026 survey shows the same, with GSE multifamily delinquency up to 1.11% from 0.97% and FHA rising too — the only capital sources getting worse while banks, CMBS, and life companies improved. Absolute levels remain low, and Fannie’s figure even ticked down in May; this is a matter of trajectory and structure, not a one-month spike.

It also hides in plain sight. Multifamily risk does not live in CMBS — the securitized market carries comparatively little of it. The exposure sits at Fannie Mae, Freddie Mac, and on bank balance sheets, and banks do not report CRE delinquency by property type the way the agencies do. A softening multifamily book is buried inside a benign-looking bank aggregate. The one place the stress shows cleanly is the agency data — and that is exactly where it is surfacing.

Why It Matters to CRE Lending and Valuation

The 2021–2022 vintage was underwritten on one assumption: that net operating income would grow fast enough to refinance into. It has stalled. Trepp’s same-store data show apartment NOI growth decelerating to 3.4% in 2024 and 1.8% in 2025, and over the five years through 2025 operating expenses grew 32.4% against just 26.6% in revenue; NCREIF puts apartment NOI growth at 3.7% for the year through mid-2025 against office at -3.5%. Apartments still out-earn office — but the cushion underwriters assumed would offset refinancing risk is gone, and four forces are now pressing on NOI at once.

First, rates are biased higher, not lower. Under Chair Kevin Warsh the Fed has turned hawkish — his August 28 Jackson Hole remarks warned that “underlying inflation is not slowing,” three FOMC members have dissented in favor of a hike, and an Iran-war energy shock and tariff-driven price pressure have markets pricing hikes rather than cuts. A 2021 loan written against a ten-year Treasury near 1.4% now refinances above 4.5%, with the risk pointed further up. Second, insurance has become both a cost and an availability problem. The Minneapolis Fed documents multifamily premiums rising 14%, then 22%, then 45% across 2021 through 2024 — roughly doubling, more than six times CPI, and climbing from about six percent of operating expenses to fourteen — even as carriers non-renew and withdraw from whole geographies, expand wind and hail exclusions, and raise deductibles. The markets hit hardest are the catastrophe-exposed, fast-growing ones where multifamily built most. Third, multifamily cannot count on the tax relief office is winning. As office values crater, those owners are securing steep assessment reductions; multifamily has no comparable value-collapse case, so its tax line stays elevated into the squeeze — and because uniformity and classification rules bar simply moving office’s lost share onto other classes, the point is relief multifamily will not get, not a burden deliberately shifted onto it. Fourth, rents themselves have hit a ceiling — from both supply and affordability. Record deliveries pushed vacancy up, and demand can no longer absorb higher rents: Harvard’s Joint Center counts 22.7 million cost-burdened renter households in 2024, 49% of all renters and a record for the third straight year, while Moody’s national rent-to-income ratio first crossed into “rent-burdened” territory near 30% in 2022. Since 2001 rents have risen 30 percent against just 9 percent of real income growth; the tank is empty. Professionally-managed apartment rents actually fell 0.6% year-over-year in late 2025. When a landlord’s costs climb, there is no longer room to raise the rent to match — the revenue line is pinned from below by tenant incomes even as expenses compound.

A Fed cut will not rescue this — and a cut is no longer the base case. The 2021 borrower refinances several hundred basis points higher regardless, into flat NOI and a shrinking loan.

The arithmetic is unforgiving, and we modeled it a year ago. A $10 million loan struck at three percent, refinancing at six with the cap rate moving from 4.75 to 5.5 percent, has to shrink to roughly $7.9 million to hold a 1.25x debt-service coverage — forcing the borrower to write an equity check near $850,000 just to refinance a performing asset, even at 68 percent loan-to-value. That model assumed three percent annual NOI growth; actual 2025 growth came in at 1.8 percent, which only widens the gap. Now scale it: roughly $162 billion of multifamily loans mature in 2026 and another $168 billion in 2027, and the fund- and syndicate-sponsored owners who levered hardest are often least able to call that equity. The regulators see it coming — through 2025 Fannie Mae and Freddie Mac built a multifamily fraud-enforcement apparatus, including a Crime Detection Unit, a $752 million fraud-loss charge, and rules forcing lenders to repurchase loans and share losses where income, rent rolls, or appraisals were inflated. The plain reading is that a slice of the boom-era book was underwritten on NOI that never existed.

Practical Implication

For lenders and investors, multifamily is no longer the automatic safe allocation. Underwrite to trended actual expenses — especially insurance and taxes — rather than pro-forma NOI, confirm that insurance is obtainable at the asset rather than merely priced, and stress exit cap rates and refinance proceeds against a four-and-a-half to five percent Treasury with room above it. Monitor the GSE and bank multifamily data, because CMBS will not show you this exposure. For owners and sponsors, treat 2026–2027 maturities as cash-in refinancings: arrange rescue equity or sell before the maturity, the rate, the tax bill, and the NOI all work against proceeds at once. For attorneys and expert witnesses, the origination underwriting — assumed rent growth and expense ratios — is the battleground in multifamily valuation, workout, and lender-liability disputes, and the agencies’ fraud enforcement establishes that inflated trailing financials were a documented problem in the relevant vintage.

My Angle

For fifteen years multifamily was the recession-resistant, always-refinanceable core of a CRE portfolio. That case rested on two things: cheap debt and rising income. Both have reversed, and every assumption that made the asset “safe” is being tested at once — rates biased higher, insurance withdrawing from the growth markets, the office collapse raising the tax bill, and supply and record renter cost burdens together capping rents, all while a $330 billion maturity wall demands equity that sponsors do not have. None of this is a delinquency spike today; the agency numbers are still low and even eased last month. That is precisely the point. The stress is in the pipeline, not yet in the print, and the asset class least prepared to hear it is the one everyone called safe. After nearly five decades in commercial lending, my counsel is not panic. It is simpler: stop pricing multifamily like it is still 2021.

Not legal advice. Analysis of commercial lending and valuation practice, not a legal opinion or a recommendation to buy, sell, or lend. Absolute delinquency levels remain low by historical standards; this is a forward-looking, structural view.

Sources: Fannie Mae Monthly Summary (May 2026) and Freddie Mac multifamily disclosures; MBA Commercial/Multifamily Mortgage Delinquency Survey, Q2 2026 (July 30, 2026); Trepp and NCREIF NPI (same-store NOI, revenue, and expense growth); Chicago Booth (J. Pagliari), “Cap Rates & Property Values — Apartment,” NCREIF-derived apartment NOI index rescaled to a $100 investment, 1978–Q1 2026 (long-run level series, not a growth rate); Harvard Joint Center for Housing Studies, America’s Rental Housing 2026, and Moody’s Analytics (renter cost burden and rent-to-income); Federal Reserve Bank of Minneapolis (2025) and NMHC State of Multifamily Risk (multifamily insurance cost and availability); Commercial Property Executive, August 19, 2026 (office assessment declines); Associated Real Estate Consultants, “Multifamily Loan Crisis Looms” (2025 refinance model); Boardwalk Wealth / MMG Real Estate Advisors (2026–27 multifamily maturities); Federal Reserve / FRED (fed funds and 10-year Treasury) and August 2026 reporting on Fed policy, the Iran-war energy shock, and tariffs; Fannie Mae and Freddie Mac multifamily fraud-enforcement actions (2025).