The capital stack is the ordered set of all capital sources funding a commercial real estate deal, ranked by repayment priority and risk. It runs from senior debt at the bottom, through mezzanine debt and preferred equity, to common equity at the top. Lower layers carry less risk and earn lower returns.
How the Capital Stack Works
The capital stack works as a priority ladder that dictates who gets paid first and who absorbs the first loss. Senior debt sits at the bottom and is repaid before anything above it. Common equity sits at the top, paid last, and takes the first loss if the property underperforms. Each layer trades priority for return.
The stack is usually drawn as four horizontal layers. Priority reads from the bottom up: the layer nearest the ground is safest and cheapest, the top layer is riskiest and most expensive. Cash flow and sale proceeds fill each layer in order before moving up. Losses hit from the top down.
Representative composition and pricing by layer, drawn from lender and sponsor commentary (JPMorgan Chase, George Smith Partners, GowerCrowd), typically fall in these ranges. Treat them as a representative structure, not fixed rules:
Layer | Position | Typical share of stack | Typical return | First loss order |
Senior debt | Most senior | 50-70% | 5-8% interest | Last to lose |
Mezzanine debt | Subordinate debt | 10-20% | 9-13% interest | Third |
Preferred equity | Senior equity | 5-15% | 14-20% | Second |
Common equity | Most junior | 20-40% | 15-25%+ IRR | First to lose |
Why the Capital Stack Matters
The capital stack matters because it defines every investor's real risk, not their headline return. A common equity target of 20%+ IRR means little if senior debt and preferred equity claim the first 80% of every dollar. Reading the stack tells an operator exactly where they stand in line and how much cushion protects their position.
For an operator underwriting a deal, the stack is the first thing to map. It sets the blended cost of capital, the leverage on the equity, and the downside exposure. A thin equity layer under heavy debt amplifies returns in good outcomes and wipes out fast in bad ones. Two deals with identical properties and identical purchase prices can carry entirely different risk once their stacks differ.
Example
A capital stack example shows how proceeds flow on a sale by repaying each layer from the bottom up. Consider a 20,000,000 dollar acquisition financed with a four-layer stack. Each layer's share follows the representative ranges above, and a loss on sale demonstrates why the top layer absorbs it first.
Layer | Share | Dollars invested |
Senior debt | 60% | 12,000,000 |
Mezzanine debt | 10% | 2,000,000 |
Preferred equity | 10% | 2,000,000 |
Common equity | 20% | 4,000,000 |
Total | 100% | 20,000,000 |
Suppose the property later sells for 18,000,000, a 2,000,000 dollar loss. Proceeds repay from the bottom up. Senior debt takes its full 12,000,000. Mezzanine takes its full 2,000,000. Preferred equity takes its full 2,000,000. That leaves 2,000,000 for common equity, which invested 4,000,000. Common equity absorbs the entire 2,000,000 loss and recovers half its capital. The debt and preferred layers are untouched. This is the first-loss rule made concrete.
Variations and Edge Cases
Capital stack variations arise because not every deal uses all four layers. A simple stack may hold only senior debt and common equity, while complex deals split debt or equity into multiple tranches. Structure varies with sponsor appetite, senior lender limits, and market conditions, as the common cases below show.
Variation | What changes |
Two-layer stack | Only senior debt and common equity. No subordinate capital. |
Preferred equity in place of mezzanine | Senior lenders that bar additional debt often permit a preferred equity slice instead. |
Stretch senior | One senior loan replaces separate senior and mezzanine layers, at a blended rate. |
Multiple mezzanine tranches | Large deals split subordinate debt into senior and junior mezzanine pieces. |
Capital Stack vs Waterfall
The capital stack is often confused with the distribution waterfall. The capital stack ranks all capital sources by repayment priority, fixed at closing. The waterfall is the set of rules that splits equity profits among partners after debt is paid. The stack governs repayment order across all capital; the waterfall governs how equity divides its share.
Put simply, the stack decides the order of repayment for the whole deal, while the waterfall decides how the common and preferred equity investors split what is left. A deal has one capital stack and, inside its equity layers, one waterfall.
Frequently Asked Questions
What are the layers of the capital stack?
The four common layers, from most senior to most junior, are senior debt, mezzanine debt, preferred equity, and common equity. Senior debt is repaid first and is safest. Common equity is paid last and takes the first loss. Not every deal includes all four.
Which capital stack position is safest?
Senior debt is the safest position in the capital stack. It sits at the bottom, is repaid before every other layer, and is usually secured by a first mortgage on the property. Its safety is why it carries the lowest return, typically 5 to 8 percent interest.
Who takes the first loss in the capital stack?
Common equity takes the first loss in the capital stack. Because it sits at the top and is paid last, any decline in value erodes common equity before it touches preferred equity or debt. This is the trade-off for its highest potential return.
Related Terms
Mezzanine Debt
Preferred Equity
Joint Venture
Loan to Value Ratio
Waterfall Distribution