Office Buildings Sit Empty and the Bill Comes Due

For the last two years, the office story has often been told as a picture of empty desks and delayed return-to-office plans. That picture is real, but it is no longer enough. By the end of Q4 2025, the national U.S. office vacancy rate stood at 20.5%, according to Cushman & Wakefield, up 30 basis points from a year earlier. That was still worse than a year before, but it was also the smallest annual increase since 2020, a sign that the vacancy climb may be slowing even as the market remains deeply oversupplied.

That mix matters. A market can look less bad on the surface and still be moving into a harder phase underneath. When the vacancy stops accelerating, it can create the impression that the danger has become manageable. But loans do not mature on sentiment. They mature on schedule. And a building that looked merely weak in one rate environment can look underwritten to a different planet in another. That is where the office problem starts to change shape. This is an interpretation, not a direct quote from the data, but it is the cleanest way to read the timing pressure now visible across the sector.

The office is not one market behaving one way. Cushman said positive demand returned in the second half of 2025, with national net absorption reaching positive 2.5 million square feet in the final six months of the year, and more than half of U.S. office markets posting positive full-year demand. That points to a market with real differentiation, not a uniform collapse.

But differentiation cuts both ways. The Federal Reserve noted in June 2025 that employers still expected about 2.3 days of remote work per week for workers who can work from home, roughly double the pre-2020 level, and that remote-enabled job postings in September 2024 were still about three times their pre-pandemic share. That does not mean every office building is impaired. It does mean demand has structurally changed in a way that leaves many older or less competitive buildings carrying more risk than headline leasing numbers suggest.

The observable signal is simple: some buildings are still attracting tenants, especially better-located and higher-quality assets, while weaker stock remains stuck with too much space and too little pricing power. The inference is that refinancing stress will not arrive evenly either. It will cluster where older debt, weak occupancy, and lower valuations meet.

That clustering risk becomes more important because 2026 is a heavy maturity year. The Mortgage Bankers Association said in February and March 2026 that 17% of the $5.0 trillion in outstanding commercial mortgages held by lenders and investors is scheduled to mature this year, or about $875 billion. Office is directly in that path: 17% of office property loans come due in 2026, and 25% of CMBS, CLO, and other ABS balances mature this year as well.

That does not mean all of that debt becomes distressed. It does mean a large volume of loans written before the rate shock now has to face today’s financing costs and today’s property values. A building may still be operating, still collecting rent, and still look stable from the street. But if its value has fallen enough, or its income is no longer strong enough to support a new loan, maturity becomes a pricing event. The pressure is less theatrical than a crash. It is more like forced recognition.

MSCI’s RCA CPPI data through early 2026 shows that office prices remain far below where they stood before rates reset. In January 2026, CBD office prices were down 40.2% over three years and 46.3% over five years, while suburban office prices were down 11.7% over three years and 6.8% over five years. Even where annual changes have improved, the larger reset is still sitting in the background.

Trepp’s January 2026 data shows how that reset shows up in credit. The office CMBS delinquency rate reached 12.34%, a new all-time high, surpassing the prior peak set in October 2025. Trepp also noted in early March that the overall CMBS delinquency rate eased in February, partly because several large matured office loans were modified or extended. That is an important clue. Some of the stress is not being solved; it is being moved forward in time.