A capital stack is a priority system wearing a spreadsheet. Strip away the formatting and every layer of a deal, senior debt, subordinate notes, preferred equity, common, is the same thing: a claim on one asset. What separates them is not glamour or cleverness. It is answer to two questions only, who gets paid first, and who absorbs the loss first. Get those two orderings right and a complicated-looking stack is actually simple. Get them wrong and a simple-looking stack is quietly dangerous. I have sat on nearly every rung of this ladder, as a lender running a credit fund and now as an owner-operator, and the mistakes I see almost never come from the instruments. They come from the sequencing.
There is a myth that creative capital structuring means inventing exotic instruments. It doesn't. The instruments are old and boring. Senior loans, second liens, preferred equity, participations, kickers, these have existed for a very long time. Creativity is sequencing familiar ones so that every layer's risk matches its price. That's the whole craft. A layer that carries a lot of risk should get paid a lot and sit low in the payment order. A layer that carries little risk should get paid little and sit at the top. When price and priority line up, the stack is honest. When they drift apart, someone is being overpaid for safety or underpaid for danger, and that gap is where deals blow up.
I think about it the way I learned to think about money as a kid on a farm in western Kansas. You got paid by the hour or paid by the project, and those were two completely different deals. By the hour was safe and capped. By the project was riskier and uncapped, you could get rained out or you could clean up. A capital stack is just that same choice, formalized, with several people making it at once on the same asset. The senior lender took the hourly deal. The common equity took the by-the-project deal. Everyone in between negotiated for some blend, and the paper records which blend each one took.
The top of the stack should be the least interesting part of the deal, and it should stay that way on purpose. Senior debt's whole job is to be cheap ballast: lowest cost, first priority, conservative advance rate. It gets paid first and it takes loss last, so it should be the calmest money in the building. You are not asking the senior lender to believe in your vision. You are asking them to hold a low, safe position and charge you a low, safe rate for it. That is the trade, and it is a good one.
The mistake sponsors make here is stretching the senior layer to minimize outside capital. It is tempting. If you can push the senior loan from a conservative advance rate up to an aggressive one, you write a smaller equity check and you save maybe two points of coupon on the money you didn't have to raise elsewhere. On a spreadsheet that looks like efficiency. In reality you just concentrated your refinance risk and your covenant risk at the worst possible layer, the one with first priority and the least patience. When the market tightens or the appraisal comes in soft, the over-levered senior is the loan that forces a sale or a default, and it does it from the top of the stack where it can do the most damage. Saving two points of coupon is not worth handing the most powerful creditor the tightest leash.
Cheap money at the top is only cheap if it never forces your hand at the bottom of a cycle.
If the senior layer is where you buy safety, the subordinate layer is where you buy flexibility, and flexibility is worth paying for. This is the part of the stack where structure actually earns its keep. A participating note. A preferred slice with a capped accrual. An equity kicker sitting on top of a fixed-rate base. Each of these lets a sponsor pay for something more useful than raw money. They let you pay for patience, for a partner who does not panic, for capital that shares your upside and therefore roots for your execution.
The mental shift is to stop thinking of a subordinate partner as someone who is renting you money and start thinking of them as someone buying a defined slice of your execution. That reframe changes how you draft. If the partner is buying a slice of the outcome, the paper had better say precisely which slice: above what hurdle, from what proceeds, measured against what documented base, paid in what order. Vagueness that feels generous while you are signing becomes the exact seam the deal tears along later. The best subordinate partner I can imagine is one who knows exactly what they own and exactly what they don't, because that is the partner who stays calm when the project hits its inevitable rough patch.
This is also where a Chairman-style approach shows up in the stack itself. I like to hold control and carry the risk while bringing in expert operators as partners who earn their equity on performance. In stack terms, that means the subordinate and equity layers aren't just capital, they're people with defined, documented stakes in how well the thing actually gets executed. You bet on the people who can pivot and execute, and then you write their incentive into the waterfall so the betting is real. I ran a private-credit fund on a two-and-twenty structure for years, and the lesson that carried over is that money follows incentives with almost embarrassing reliability. If a layer of your stack is paid to be patient, it will be patient. If it is paid to panic, it will panic at the worst possible moment. The waterfall is not paperwork after the fact. It is the thing that decides how every partner behaves when the project gets hard.
Let me put a real shape on it using our deal at 3215 W 83rd Street in Leawood, Kansas, then run illustrative numbers so the ordering is visible. On that deal our position is a second-lien note sitting behind a senior mortgage. So even in that one transaction you already have a small stack: senior mortgage on top, our subordinate note behind it, and the sponsor's own equity underneath us. Three rungs, one asset, a clear order of who gets paid and who absorbs loss first. The dollar figures below are illustrative, meant to show the mechanics, not a forecast of that property.
Picture a project that needs $1,000,000 all in. Say the senior mortgage is $600,000 at a conservative advance rate and a low coupon, first priority, first to be paid, last to take loss. Behind it sits our second-lien note of $250,000, a participating structure with a fixed floor and a share of the profit above a hurdle. Underneath both of us is $150,000 of the sponsor's common equity, first-dollar loss, uncapped upside. Now watch the order work. When the asset sells, proceeds pay the senior mortgage's principal and interest first, in full, before we see a dollar. Then our note's principal and accrued floor. Then, once a documented hurdle is cleared, our participation and the sponsor's profit split according to the waterfall the paper spelled out.
Run the good case and the bad case, because the ordering only matters at the extremes. In the good case the property sells well above cost. Everyone gets paid in sequence, the senior collects its modest coupon and goes home, we collect our floor plus our participation, and the sponsor keeps the lion's share of the upside because they took first-dollar risk to earn it. In the bad case the property sells for less than expected. The loss walks up the stack from the bottom: the sponsor's $150,000 of common equity absorbs the first hit, entirely, before our note loses a cent. Only if the shortfall is severe enough to burn through that whole equity cushion does our second lien start to feel it, and the senior mortgage, sitting on top with a conservative advance rate, would be the very last to be impaired. That is the stack doing its job. The risk each layer accepted going in is exactly the risk it bears coming out.
The way I check whether a stack is honest is to try to explain it to a skeptic in three minutes. Who is owed what, in what order, from what proceeds, verified by which documents. If I can answer all four in plain language without reaching for a marker, the structure is sound. If I find myself needing a whiteboard and an apology, needing to say 'it's complicated, but trust me,' then the structure isn't allocating risk, it's hiding it. Complexity that can't be explained simply is almost always concealing a layer whose price and priority don't match.
Notice what that test is really measuring. It is measuring whether the waterfall is defined against objective, documented bases or against somebody's after-the-fact opinion. Who is owed what should tie to signed notes. In what order should be one clean paragraph. From what proceeds should reference a settlement statement, not a vibe. Verified by which documents should name the invoices, the appraisal, the cost basis. A stack that passes the three-minute test is a stack where every argument was resolved on paper before anyone knew who the answer would favor. That is the only honest time to resolve them.
The point of all this is not to collect exotic instruments. It is to build a structure that survives the day the deal disappoints, because that is the only day the structure matters. When everything goes right, any stack looks brilliant and nobody reads the documents. The stack earns its keep on the bad Tuesday, when proceeds are short and everyone reaches for the paper to find out where they stand. On that day you want a senior layer that is boring and safe, a subordinate layer whose risk you actually paid for, and an equity layer that knew going in it was standing at the front of the loss. You want price and priority lined up on every rung.
So keep the senior boring, make the subordinate layer earn its flexibility, write every partner's slice into the waterfall in language a stranger could verify, and pressure-test the whole thing against the three-minute explanation before you sign anything. Capital is meant to be stewarded, not stacked up for its own sake, and a well-built stack is stewardship you can defend out loud. The instruments are old and the math is simple. The discipline is entirely in the order of operations, and the order of operations is the part that decides who sleeps at night when the market turns.
Strategy notes on underwriting, structure, and disciplined execution. No noise.