Capital Stack Types in Commercial Real Estate: A Sponsor’s Guide

Analyst reviewing commercial real estate documents

Every commercial real estate deal is funded by a layered hierarchy of capital sources, each with distinct priority, risk, and return characteristics. That hierarchy is the capital stack, and it has four primary layers:

Senior debt — first lien, lowest cost, paid first
Mezzanine debt — secured by equity pledge, subordinate to senior debt
Preferred equity — hybrid capital with a prioritized fixed return, no lien
Common equity — last paid, first to absorb losses, highest upside potential

The repayment waterfall flows in that exact order: senior debt service is covered first, then mezzanine interest, then preferred returns, and common equity captures whatever remains. Understanding this sequence is not optional for sponsors or investors — it determines who gets hurt first when a deal underperforms, and who captures the upside when it outperforms.

What is the capital stack in commercial real estate?
How each capital stack layer works: instruments, investors, and returns
How the capital stack affects underwriting, risk allocation, and sponsor incentives
How to evaluate a deal’s capital stack before you commit
A worked waterfall: $10M acquisition showing how proceeds flow
Key risks and structural pitfalls to avoid
Tax treatment for investors in each capital stack layer
Key Takeaways
The capital stack is where deals are won or lost
Brookmontcapital structures and sources your full capital stack
Useful sources and further reading

What is the capital stack in commercial real estate?

The capital stack is the complete picture of every funding source behind a CRE transaction, arranged by repayment priority and legal seniority. It covers both the debt side and the equity side, which is a distinction worth making explicit: a debt stack only counts senior and subordinate loans, while the capital stack includes preferred and common equity as well. Treating preferred equity as debt in underwriting can violate lender covenants or trigger loan recharacterization, so the terminology matters.

For sponsors and investors, the stack is the central underwriting document. Payment priority, lien rights, and return drivers all flow from how the stack is assembled. A senior lender evaluating loan-to-value (LTV) or debt service coverage ratio (DSCR) is really asking: how much subordinate capital sits below me, and how much of a loss buffer do I have? A preferred equity investor is asking: does my position get paid before the sponsor’s promote? Every layer answers a different version of the same question about risk and return.

Stack composition also changes sponsor incentives directly. A sponsor who has contributed minimal common equity and loaded the deal with high-cost mezzanine or preferred capital has less cushion before those expensive layers start eroding returns. That misalignment is one of the most common structural problems Brookmontcapital sees in deals that stall at committee review.

How each capital stack layer works: instruments, investors, and returns

The table below compares the four primary layers across the dimensions that matter most for underwriting and deal evaluation.

Layer	Priority	Typical Instruments	Typical Investor	Security / Rights	Risk Profile	Typical Return / Pricing
Senior debt	1st	Construction loan, bridge loan, agency permanent, CMBS	Bank, agency lender, debt fund, CMBS conduit	First-lien deed of trust	Lowest	Lowest interest rate; varies by product
Mezzanine debt	2nd	Mezz loan, B-note	Debt fund, family office, mezz lender	Pledge of ownership interests (UCC)	Moderate-high	Mid-to-high single digits to mid-teens
Preferred equity	3rd	Hard pref, soft pref, JV preferred interest	Private equity, family office, debt fund	Change-of-control / takeover provisions	Moderate-high	Typically 8–12% targeted preferred return
Common equity	4th (last)	LP interests, JV equity, sponsor equity	Sponsor (GP), LP investors, syndicators	Residual ownership	Highest	Uncapped; IRR-driven

Senior debt

Senior debt occupies the first-lien position and carries the lowest cost of capital in the stack. For stabilized multifamily, agency products from Fannie Mae and Freddie Mac typically dominate. For stabilized office, retail, and industrial, CMBS loans are a common execution path. Value-add and transitional assets usually require a bridge loan until the property stabilizes and qualifies for permanent financing. Ground-up development relies on construction loans, which carry higher pricing and more complex draw mechanics than permanent debt. Senior debt typically represents 50–75% of total capitalization, depending on deal type and lender appetite.

Hands arranging senior debt financing documents

Mezzanine debt

Mezzanine debt sits directly behind senior debt in priority and is secured not by a lien on the property but by a pledge of the borrower’s ownership interests in the property-owning entity. That structure gives mezz lenders the ability to foreclose on the equity interests and step into ownership without disrupting the first-lien loan. Typical sizing represents a modest portion of total capitalization. One critical constraint: agency lenders generally disallow mezzanine debt on stabilized multifamily loans, which pushes sponsors toward preferred equity when they need additional leverage on those assets.

Preferred equity

Preferred equity functions as hybrid capital: it offers a prioritized fixed return paid before common equity distributions, but it generally lacks foreclosure rights. Instead, preferred equity agreements rely on change-of-control provisions or takeover rights that allow the preferred investor to remove the sponsor and assume management if the preferred return is not met. Hard preferred equity accrues unpaid returns and compounds them; soft preferred equity does not. Sponsors who do not read this distinction carefully can find themselves facing a much larger payoff obligation than their pro forma assumed. Preferred equity typically targets an 8–12% preferred return and accounts for a moderate portion of the stack.

Common equity

Common equity is the last-paid, first-loss layer, and it is also where sponsors and limited partners capture uncapped upside. In favorable markets, the potential for outsized returns motivates more aggressive stack designs, with sponsors pushing leverage higher to reduce their equity contribution. The risk is asymmetric: common equity absorbs 100% of losses before any other layer is impaired. Typical sizing represents a meaningful share of total capitalization, though ground-up development deals often require more.

Stack composition directly shapes the underwriting metrics every lender and investor uses to evaluate a deal. A senior lender sizing a loan at 65% LTV on a stabilized asset has a meaningful loss buffer. Add a 10% mezzanine tranche and the combined leverage reaches 75%, compressing the margin of safety and increasing the blended cost of capital. That blended rate matters because it must be covered by net operating income (NOI) before any equity return is possible.

Correctly pricing each layer is often the difference between a deal that pencils and one that stalls in underwriting. A sponsor who underestimates the all-in cost of a mezz-plus-pref structure may find that the projected common equity IRR is insufficient to attract LP capital, even if the deal looks attractive on a gross basis. The stack is not just a funding mechanism — it is a return-allocation machine, and every layer has a claim on NOI or sale proceeds before common equity sees a dollar.

Control rights and default remedies also vary by layer. Senior lenders hold foreclosure rights under the deed of trust. Mezz lenders can foreclose on the equity pledge. Preferred equity investors can trigger change-of-control provisions. Common equity holders have no priority claim and no independent remedy. Sponsors who layer in too much subordinate capital may find that a single quarter of underperformance triggers a cascade of remedies they cannot cure. For a deeper look at how these dynamics play out when senior lenders tighten terms, Brookmontcapital’s capital stack structuring playbook covers the mechanics in detail.

How to evaluate a deal’s capital stack before you commit

A well-structured stack is transparent, internally consistent, and stress-tested. Use this checklist before signing any commitment or LP subscription:

Identify every layer and its provider. Who is providing senior debt, mezz, and preferred equity? Are any layers from related parties?
Confirm lien position and security for each debt layer. Is the senior loan a first-lien deed of trust? Is mezz secured by an equity pledge or a second lien?
Review intercreditor and co-lender agreements. Do the senior lender and mezz lender have a signed intercreditor? What are the cure rights and standstill periods?
Verify pricing and accrual mechanics. Is the preferred equity return current-pay or accruing? What is the mezz coupon, and does it include an exit fee or PIK component?
Check covenants and trigger events. What DSCR or LTV covenant triggers a default or cash sweep? Is there a cash management agreement?
Map the waterfall and promote structure. At what hurdle does the GP promote kick in? Is there a GP catch-up? What is the LP preferred return?
Stress-test exit assumptions. What cap rate is assumed at sale? Does the deal still work at a 50-basis-point cap rate expansion?

Questions to ask the sponsor directly: Is the mezzanine secured by an equity pledge or a property lien? Is the preferred equity hard or soft? What is the takeout strategy for the bridge loan, and is there a rate cap in place?

Red flags to watch for: an opaque waterfall with undefined promote splits; a back-loaded preferred coupon that accrues without a clear payoff mechanism; a sponsor promote that vests before LP capital is returned; and exit timing assumptions that require a sale within 24 months in a market with limited transaction volume. A commercial loan calculator can help you model debt service at different leverage points before you run the full waterfall.

A worked waterfall: $10M acquisition showing how proceeds flow

The following illustrative example shows a simple $10M acquisition with a four-layer stack. All figures are for illustration purposes only.

Team discussing capital stack waterfall flow chart

Sources of capital:

Layer	Amount	% of Stack	Pricing
Senior debt	—	65%	6.5% interest rate
Mezzanine debt	—	10%	12% coupon
Preferred equity	—	10%	10% preferred return
Common equity	—	15%	Residual / promote
Total	—	100%

Illustrative payout order on a $12.5M sale (Year 5):

Waterfall Step	Amount Paid	Recipient
1. Senior loan payoff	—	Senior lender
2. Mezzanine loan payoff (principal + accrued interest)	—	Mezz lender
3. Preferred equity return of capital + 10% pref	—	Preferred equity investor
4. Return of common equity capital	—	LP / sponsor
5. Residual proceeds (promote split varies by deal)‏	$892,500	LP (80%) / GP (20%)

In this base case, common equity investors receive their capital back plus a share of the $892,500 residual, producing a meaningful IRR depending on hold period and interim cash flow.

Sensitivity: 10% NOI shortfall. If net operating income falls 10% below pro forma, the property’s sale value may compress by a similar margin, reducing gross sale proceeds to approximately $11.25M. After paying senior debt, mezz, and preferred equity in full, the residual available to common equity drops sharply. The LP preferred return may still be met, but the GP promote disappears entirely. This is the asymmetric risk profile of common equity in a levered stack.

Pro Tip: When modeling a value-add deal, always run the waterfall at both your base-case and a downside exit cap rate. The difference in common equity IRR between a 5.5% and a 6.0% exit cap rate is often larger than sponsors expect, particularly when mezz and pref layers are sized aggressively.

For sponsors building stacks for value-add multifamily, Brookmontcapital’s value-add financing guide walks through deal-type-specific structures in more detail.

Key risks and structural pitfalls to avoid

Understanding the mechanics of each layer is necessary but not sufficient. The real risk in a capital stack often comes from how the layers interact under stress.

Aggressive mezz sizing. Pushing mezzanine to 15% or more of the stack compresses the common equity cushion and increases the blended cost of capital, which can make the deal unworkable if NOI comes in below pro forma.
Mischaracterized preferred equity. Sponsors sometimes present preferred equity as “cheap” capital without disclosing accrual mechanics. A 10% hard preferred that accrues for three years is a materially different obligation than a current-pay soft preferred at the same rate.
Balloon payments without a credible takeout. Bridge loans and construction loans mature. If the takeout lender requires stabilization metrics the property has not yet reached, the sponsor faces a maturity default. Construction finance rates have shifted project math significantly in recent cycles, making takeout assumptions more fragile than they appear on a pro forma.
Layering too much high-cost capital. A stack with mezz at 12% and preferred equity at 10% on top of a 6.5% senior loan produces a blended cost that leaves very little room for common equity returns unless the deal executes perfectly.
Cap rate expansion risk. A deal underwritten at a 5.0% exit cap that sells at 5.75% can wipe out the common equity return entirely, even if operations performed on plan.

Mitigations: underwrite to conservative exit cap rates; stress-test DSCR at 10–15% below pro forma NOI; require rate caps on floating-rate senior debt; and confirm that sponsor economics do not vest until LP capital is returned. Reviewing the preferred equity vs. mezzanine comparison before finalizing subordinate capital structure can prevent costly structural errors.

Tax treatment for investors in each capital stack layer

Tax treatment varies meaningfully across the stack and should factor into how investors evaluate net returns.

Senior and mezzanine debt investors receive interest income, which is taxed as ordinary income at the federal level. There is no depreciation benefit and no capital gains treatment on interest payments. Mezz lenders structured as debt funds may pass income through to investors as ordinary income, reducing the after-tax return relative to equity positions.

Preferred equity investors occupy a more nuanced position. If the preferred equity is structured as a true equity interest in the property-owning entity, investors may receive a share of depreciation and other pass-through deductions, which can shelter a portion of the preferred return from current taxation. If the preferred equity is structured more like debt (fixed return, no residual participation), the IRS may recharacterize it as debt, eliminating the equity tax benefits.

Common equity investors typically benefit from pass-through depreciation, including bonus depreciation on qualifying personal property and cost segregation studies that accelerate deductions. Capital gains on sale are generally taxed at long-term capital gains rates if the asset is held for more than one year, which is a meaningful advantage over ordinary income treatment. Sponsors receiving a promote (carried interest) have historically benefited from capital gains treatment on that promote, though this area of tax law has seen ongoing legislative scrutiny.

This article provides general information about capital stack structures and is not tax or legal advice. Consult a qualified tax professional or attorney for guidance specific to your situation and deal structure.

Key Takeaways

The capital stack’s repayment order, from senior debt through common equity, determines every investor’s risk exposure and return potential in a CRE deal.

Point	Details
Payment priority is absolute	Senior debt is paid first; common equity is paid last and absorbs first losses.
Mezz vs. preferred equity choice matters	Agency multifamily loans typically prohibit mezzanine; use preferred equity for additional leverage on those assets.
Blended cost of capital drives feasibility	Stacking mezz and preferred equity raises the all-in cost; model the full waterfall before committing to a structure.
Waterfall terms determine sponsor economics	Promote splits, preferred return hurdles, and GP catch-up provisions define when and how the sponsor gets paid.
Brookmontcapital structures and sources all layers	Brookmontcapital’s capital markets advisory covers senior debt, mezz, preferred equity placement, and full waterfall modeling for sponsors nationwide.

The capital stack is where deals are won or lost

Most sponsors focus on the asset: the location, the business plan, the rent growth assumptions. The capital stack gets treated as a financing detail to sort out after the deal is under contract. That sequencing is backward, and it is one of the most consistent patterns in deals that fail to close or underperform.

The stack is not a funding mechanism layered on top of the deal. It is the deal’s financial architecture, and every layer you add changes the risk profile for every other layer. A mezz tranche that looks manageable at a 12% coupon becomes a serious problem when NOI runs 15% below pro forma for two consecutive quarters and the mezz lender’s cure period expires. A preferred equity position that looks like cheap gap capital becomes a control risk if the accrual mechanics are not fully understood before closing.

The sponsors who consistently execute well are the ones who design the stack before they finalize the acquisition price, not after. They know their blended cost of capital before they submit a letter of intent. They have already modeled the waterfall at a downside exit cap rate. And they understand which layer of the stack is most likely to cause friction if the deal hits turbulence.

The other thing worth saying plainly: not every deal needs all four layers. A stabilized multifamily acquisition with strong DSCR may only need senior agency debt and common equity. Adding mezz or preferred equity to hit a higher leverage target increases complexity and cost without necessarily improving returns. The right stack is the simplest one that gets the deal done at acceptable risk.

Brookmontcapital structures and sources your full capital stack

Sponsors who need more than a term sheet need a capital markets advisor who can design the stack, price each layer, and deliver the right capital providers to the table. Brookmontcapital works with real estate developers, investors, and sponsors nationwide to structure and source every layer of the capital stack, from senior debt and bridge loans to mezzanine placement and preferred equity solutions.

Brookmontcapital

The firm’s advisory process covers deal underwriting, lender packaging, and direct placement with institutional lenders, debt funds, and equity partners. Whether you need a construction loan with a credible takeout path, a preferred equity solution to bridge a gap in your capital structure, or a full capital stack advisory engagement to take a deal from concept to close, Brookmontcapital brings the relationships and the structuring expertise to get it done.

Senior debt sourcing: agency, CMBS, bridge, and construction financing
Mezzanine and preferred-equity placement
Waterfall modeling and underwriting support
Institutional-grade deal packaging and lender presentations
Fractional deal team support for sponsors without in-house capital markets staff

Review Brookmontcapital’s full range of commercial real estate financing solutions or contact the team directly to discuss your deal’s capital structure.

Useful sources and further reading

The following sources informed the analysis, waterfall mechanics, and layer descriptions in this article:

Capital Stacks Explained: Who Gets Paid and When — Midwood Asset Management — primary source for waterfall mechanics, repayment priority, and typical return ranges
Capital Stacking in CRE — Lev — source for preferred equity structure, agency mezzanine restrictions, and capital stack vs. debt stack distinction
Capital Stack: Real Estate Investment Structure — Wall Street Prep — source for typical layer sizing percentages
Navigating the Capital Stack — RCA Capital — source for mezzanine security structure and equity pledge mechanics
Capital Stack Structure, Debt & Equity — Corporate Finance Institute — background on common equity upside and sponsor incentives
Preferred Equity vs. Mezzanine Debt — Brookmontcapital — practical comparison of subordinate capital structures for sponsors
Capital Stack Structuring Playbook — Brookmontcapital — advisory guidance on restructuring stacks when senior lenders tighten terms

Capital Stack Types in Commercial Real Estate: A Sponsor's Guide

Capital Stack Types in Commercial Real Estate: A Sponsor’s Guide

Table of Contents

What is the capital stack in commercial real estate?