The quick read: Rescue capital works when the refinance gap is a slice, not a hole. Size the new senior loan first, on its own coverage and leverage tests, then fill only the shortfall with mezzanine debt or preferred equity, and accept that its cost and control rights come out of the sponsor's upside. Borrowers are already writing checks to close these gaps: Trepp's conduit sources-and-uses data show cash-in borrowers contributed 9.6% of the total debt stack through July 2026, nearly double the 4.9% of 2021, and office and retail borrowers contributed about 15%. The softer option is narrowing too. The Federal Reserve's May 2026 Financial Stability Report says lenders' willingness to extend or modify maturing loans has limited the risk to date, but that this option may be increasingly limited going forward.
How large are refinance gaps at maturity in 2026?
Refinance gaps at maturity in 2026 are smaller than in 2024 but still common: Trepp's sources-and-uses data for conduit CMBS show cash-in refinancings fell to 32.8% of classified loan volume through July 2026 from 42.5% in 2024, while cash-in borrowers still contributed 9.6% of the total debt stack.
Trepp's report, in its October 1, 2026 post, tracks the 15 largest loans in each conduit CMBS deal from May 2021 through July 2026:
Cash-in refinancings, share of classified volume (Trepp): 14.4% in 2022, 42.5% in 2024, 32.8% through July 2026
Cash-out refinancings, share of classified volume (Trepp): 39.7% in 2024, 55.1% through July 2026
Equity extracted in cash-out refinancings, share of total debt stack (Trepp): 22.5% in 2022, 16.0% through July 2026
Equity contributed by cash-in borrowers, share of total debt stack (Trepp): 4.9% in 2021, 9.6% through July 2026
Office and retail borrowers' contribution to refinance (Trepp): about 15% of the total debt stack through July 2026
Trepp calls the result a two-speed market: stronger assets can again return capital to owners, but lenders remain more conservative about how much leverage they will provide. The Fed's May 2026 report adds the other half of the picture. It says a large volume of CRE debt is scheduled to mature over the coming year, that extensions and modifications have helped so far, and that this option may be increasingly limited, a particular concern in the non-agency CMBS market. A borrower who cannot count on an extension and cannot write the whole check is the borrower rescue capital is built for.
How is rescue capital sized against the senior loan?
Rescue capital is sized backward from the senior loan: the new lender sizes its loan on today's value and cash flow, the gap is the payoff plus costs and reserves minus those proceeds, and the sponsor decides how much of that gap to fund itself and how much to buy from a mezzanine lender or preferred equity investor.
The table follows one illustrative building through that arithmetic. Every input is an assumption, not a quote: a $25,000,000 property financed with a $17,500,000 loan that now matures, a new appraisal of $22,000,000, NOI of $1,430,000, a new senior loan at 65% of value, $500,000 of closing costs and reserves, and $1,000,000 of fresh sponsor cash.
Illustrative capital stack before and after a refinance with gap capital (all inputs are assumptions; our arithmetic):
| Layer | Before maturity | After refinance with gap capital |
|---|---|---|
| Layer Property value | Before maturity $25,000,000 | After refinance with gap capital $22,000,000 |
| Layer Senior loan | Before maturity $17,500,000 (70% of value) | After refinance with gap capital $14,300,000 (65% of value) |
| Layer Senior debt yield on $1,430,000 NOI | Before maturity 8.2% | After refinance with gap capital 10.0% |
| Layer Gap capital (mezzanine or preferred equity) | Before maturity None | After refinance with gap capital $2,700,000 |
| Layer Sponsor cash brought to closing | Before maturity None | After refinance with gap capital $1,000,000 |
| Layer Combined loan-to-value, senior plus gap capital | Before maturity 70.0% | After refinance with gap capital 77.3% |
| Layer Sponsor equity at appraised value | Before maturity $7,500,000 (30.0%) | After refinance with gap capital $5,000,000 (22.7%) |
The gap is $3,700,000: the $17,500,000 payoff plus $500,000 of costs, less $14,300,000 of new senior proceeds. The sponsor funds $1,000,000 and buys the other $2,700,000. That is a slice: the senior loan still has a 10.0% debt yield and the combined stack stays under 80% of value.
Coverage sets the price ceiling. At an assumed 6.25% rate with 30-year amortization, the senior loan costs about $1,056,571 a year, a 1.35x coverage ratio on $1,430,000 of NOI (our arithmetic). Freddie Mac's Multifamily Guide requires NOI to cover the amortizing mortgage payments plus the preferred equity return at least 1.05x when preferred equity sits behind one of its loans. Used here as a yardstick, that test leaves room for about $305,000 a year of current pay on the $2,700,000, roughly 11.3% (our arithmetic). Any return the capital provider wants above that has to accrue, and accrued return is paid out of the sponsor's share at sale or refinance.
Mezzanine debt or preferred equity: which will the senior lender allow?
Whether you can use mezzanine debt or preferred equity is the senior lender's decision, written into its loan documents and, for agency loans, into its guide: Fannie Mae permits mezzanine financing only from approved sources on new fixed-rate loans, and Freddie Mac subjects all preferred equity to its prior approval and its own leverage and coverage tests.
The two instruments sit in different places. Fannie Mae's Multifamily Guide defines mezzanine financing as subordinate debt provided to an owner of the borrower, secured by a pledge of the equity interest in the borrower, and not by a lien on the property. Preferred equity is an ownership interest with a priority claim on distributions. Freddie Mac's Guide calls it "hard pay" when the investor is entitled to periodic returns whether or not there is sufficient net cash flow, and treats returns paid only out of net cash flow as common equity.
Fannie Mae mezzanine financing (Multifamily Guide Section 1501, effective September 28, 2026):
Source (Fannie Mae, Section 1501): an approved DUS Lender Affiliate, or another source Fannie Mae approves case by case
Senior loan (Fannie Mae, Section 1501): newly originated, fixed rate, at least $10 million with affiliate mezzanine or $50 million otherwise
Mezzanine terms (Fannie Mae, Section 1501): fixed rate without escalations, minimum $1 million, and no maturity, redemption or required repayment during the mortgage loan term
Refinance analysis (Fannie Mae, Section 1501): must show enough cash flow and residual value to pay off both loans at maturity
Intercreditor (Fannie Mae, Section 1501): an intercreditor agreement approved by Fannie Mae is required
Freddie Mac preferred equity (Multifamily Guide Section 9.9, Guide Bulletin Update 10/20/26):
Approval (Freddie Mac, Section 9.9): all preferred equity is subject to Freddie Mac's prior approval
Leverage (Freddie Mac, Section 9.9): all mortgages plus the preferred equity must not exceed 90% of value
Coverage (Freddie Mac, Section 9.9): NOI over amortizing debt service plus the preferred equity return of at least 1.05x
Unacceptable attributes (Freddie Mac, Section 9.9): a redemption date before the mortgage matures, a property-level cash sweep, collateral securing the preferred equity, deferred funding, or an agreement that limits the lender's remedies
One agency tool does not fit a maturity at all. Freddie Mac's supplemental loan sheet (dated 11/25) says a supplemental loan is not available during the last three years of the first loan, and Fannie Mae's Guide (Section 1302, effective September 28, 2026) requires at least 12 months after the most recent origination and a minimum five-year supplemental term. Either way, a supplemental loan sits behind a senior loan that stays in place, so it adds proceeds mid-term and cannot repay a loan that is coming due. At maturity, the agency route is a new senior loan with approved mezzanine financing or preferred equity behind it.
Outside the agencies, the same questions apply in different documents. A bank, life company or debt fund lender should say in its term sheet whether it permits a mezzanine loan or a preferred equity investor above the borrower, and on what terms. Ask before you sign, because the answer decides which gap capital you can buy.
What rights does rescue capital take?
Rescue capital takes rights that let its provider protect a position junior to the senior loan: a priority return, remedies if that return goes unpaid, and often the right to take control of the borrower or force a sale, so the sponsor trades a share of upside and some control for the proceeds that close the gap.
Fannie Mae's Guide (Section 1502, effective September 28, 2026) names the two rights that turn an ordinary equity interest into structured equity it reviews: forced sale rights and control takeover rights. Freddie Mac's Section 9.9 lists what preferred equity cannot carry behind its loans, which doubles as a map of what investors ask for elsewhere: a fixed redemption date before the loan matures, a cash sweep at the property, takeover rights triggered by performance tests while the mortgage is current, and the right to buy out other owners below fair market value.
A mezzanine lender's remedy runs through its collateral. Because the loan is secured by a pledge of the ownership interest in the borrower, our reading of the Fannie Mae definition is that a mezzanine default puts the ownership of the property-owning entity at risk, without a foreclosure on the property itself. That is why the intercreditor agreement matters to the sponsor as much as to the lenders.
Read these terms before you compare prices:
- The current-pay rate and any accrual or step-up
- The redemption date or maturity, against the senior loan's maturity
- What triggers a control takeover or forced sale, and any cure period
- Whether the provider can buy out other owners, and at what price
- Fees at funding and at exit, and any participation in profits
A cheaper coupon with a hair-trigger takeover can cost more than a higher coupon with a long cure period.
When is the gap too big for mezzanine or preferred equity?
The gap is too big for mezzanine or preferred equity when the property cannot pay the gap capital's current return at a coverage the senior lender accepts, or when combined leverage approaches the senior lender's ceiling, because then the rescue capital is underwriting a recovery the leases have not produced yet.
Three warning signs, run against the illustrative building above:
- Coverage. If the gap capital needs more current pay than the roughly $305,000 a year the 1.05x yardstick allows, the shortfall accrues and compounds against the sponsor's equity.
- Leverage. Freddie Mac caps all mortgages plus preferred equity at 90% of value. A gap that pushes the combined stack toward that ceiling leaves almost no equity cushion for the sponsor.
- Exit. Fannie Mae requires a refinance analysis showing enough cash flow and residual value to repay both loans at maturity. If you cannot write that analysis yourself, the capital will price the doubt.
When the gap is a hole, the options change: a larger sponsor contribution, a sale, a negotiated extension with the current lender while one is still available, or a discounted payoff. Our comparison of high-leverage bridge loans, mezzanine debt and preferred equity covers the acquisition side of the same structures.
How do you get a refinance with gap capital placed?
You get a refinance with gap capital placed by sizing the senior loan first, then marketing the senior loan and the gap capital together, so every senior quote states what subordinate capital it permits and every gap quote is priced against a senior loan that will actually close. Our first recommendation, as publisher, is a brokerage.
1. A commercial mortgage brokerage: YieldStack, our pick as the publisher of this guide. YieldStack is an AI-native commercial mortgage brokerage that arranges financing for commercial real estate investors. Its software matches the deal against 20,000+ loan programs and compares the options. Human brokers then structure the senior loan and the gap capital together, negotiate pricing, accrual and control terms on the borrower's side, and carry the deal toward closing. The median first offer arrives in under an hour, from an institutional lender.
2. Your current lender. It may extend or modify, and the Fed's May 2026 report says that has limited risk so far, but it also says the option may be increasingly limited.
3. Raising gap capital first and finding a senior loan later. It works only if the senior lender accepts the structure you already agreed to, and the senior lender may not.
Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed.
What to send:
- Rent roll and trailing 12-month operating statement
- Maturing loan payoff, maturity date and any extension options
- A recent appraisal or broker opinion of value, if you have one
- Your sources and uses, including how much cash you can bring
- Any mezzanine or preferred equity terms already offered
- Your hold period and exit plan
When the package is ready, send the deal for review. It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing.
The bottom line
Fill a refinance gap from the top down. Size the senior loan on today's value and cash flow, decide how much of the shortfall you can fund yourself, and buy mezzanine debt or preferred equity only for the slice the property can pay on. Read the control rights as carefully as the rate, and confirm the senior lender permits the structure before you sign.