On a Tuesday in early May, Trepp reported that the CMBS special servicing rate had climbed 38 basis points in April to 11.38%. The driver: office loans. $1.93 billion across 43 new transfers landed in special servicing, overwhelming the return of several large office, retail, and mixed-use loans that had been resolved.

Office led the property-type surge, rising 93 basis points. Multifamily added 33 basis points. Industrial ticked up 20. Lodging rose eight. Mixed-use edged two. Retail was unchanged. The pattern is unmistakable: office distress is accelerating, and no other sector is absorbing the slack.

The special servicing rate now sits at 11.38%, a level not seen since the early pandemic months. But the composition is different. In 2020, lodging and retail dominated. Today, office is the sole driver of the upward move. That concentration matters for investors who assumed office exposure was manageable within diversified CMBS pools.

New transfers totaled $1.93 billion in April. That is not a spike relative to recent months, but the cumulative effect is compounding. Loans that enter special servicing rarely exit quickly. The average resolution timeline for office loans now exceeds 18 months, per Trepp data. Each month's inflow adds to a growing stock of unresolved distress.

The office special servicing rate increase of 93 basis points in a single month reflects both new transfers and the failure of existing workouts to produce resolutions. Lenders are not modifying terms at scale. They are taking control, foreclosing, or selling at a discount. The bid-ask spread remains wide, and special servicers are choosing to hold rather than realize losses.

Multifamily's 33-basis-point rise is a secondary concern but worth watching. The sector had been a relative safe haven. Rising operating costs, insurance premiums, and rent growth deceleration are pushing more properties toward cash flow shortfalls. The 33 bps move suggests the pressure is broadening beyond office.

Industrial's 20-basis-point uptick is small in absolute terms but notable given the sector's post-pandemic strength. The industrial special servicing rate remains low, but the direction is upward. If industrial begins to crack, the CMBS market will have lost its last resilient property type.

Retail's flat rate is not a sign of health. It reflects that the worst retail loans have already been resolved or written off. The remaining retail collateral in CMBS is either performing or already in special servicing. Flat is the new floor, not a recovery.

The broader implication for capital markets is clear. The CMBS special servicing rate is a lagging indicator, but it is now confirming what the delinquency rate has been signaling for months: office distress is structural, not cyclical. The 11.38% rate will likely rise further as more office loans reach maturity and fail to refinance.

Lenders are tightening underwriting on office loans to 50-55% LTV at SOFR plus 300-400 basis points, per recent deal terms. That is a far cry from the 65-70% LTV at SOFR plus 150-200 bps that prevailed in 2021. The refinancing gap for office loans coming due in 2026 is estimated at $30 billion, per Trepp. Special servicing will absorb a growing share of that volume.

For institutional investors, the April data reinforces the need to differentiate between property types within CMBS portfolios. Office concentration is a liability. Multifamily and industrial are showing early stress. Retail is a dead zone. The special servicing rate is not a single number; it is a composite of diverging trajectories.

The 38-basis-point move in April is not a crisis. But it is a signal that the office distress cycle has not peaked. The $1.93 billion in new transfers is a monthly reminder that the resolution pipeline is clogged. Until special servicers start clearing cases faster than new ones arrive, the rate will keep climbing.