Reading a Capital Stack Without Falling Asleep

The first time someone slid a capital stack across the table at me, I nodded like I understood and went home to figure out what I'd just agreed to. If that's you, this is the explainer I wish I'd had.

It's just a payment line

Forget the diagram for a second. A capital stack is a line of people waiting to get paid out of the same deal, in a fixed order. The people at the front take the least risk and the smallest return. The people at the back take the most risk and — if everything works — the biggest one.

That's the whole idea. Everything else is detail about where each person stands in line.

The four spots in line

Senior debt is first. The bank lends maybe 60–70% of cost, gets paid before anyone else, and in exchange takes the lowest rate and the collateral. If the deal dies, they get the building. They almost always get made whole.

Mezzanine sits behind the bank. It fills the gap between what the bank will lend and what the sponsor wants to put in. Higher rate, because they only get paid after senior is current — and if things go sideways, their recovery is thinner.

Preferred equity is next. "Pref" gets a stated return before common equity sees a dollar. It feels like equity but behaves a bit like debt — a fixed-ish payment, just further back in line.

Common equity is last. The sponsor and the LPs. They get whatever's left after everyone ahead of them is satisfied. That's the worst position when a deal struggles and the best position when it sings, because the upside is uncapped.

Why sponsors build it this way

If equity is the most expensive money, why not raise all equity and keep it simple? Because leverage amplifies returns on the equity that is in the deal. Borrow at 7% to buy something yielding 9%, and the spread accrues to the common position. Use too little debt and you leave returns on the table; use too much and one bad quarter wipes out the people at the back of the line.

The stack is the sponsor's answer to one question: how much risk do I move to people who'll accept a fixed return, so the common position earns more on less cash?

What to actually check

When you see a stack, don't admire the diagram — interrogate it:

• How much is senior? The higher the leverage, the less room for error.
• What does the pref cost, and is it cumulative? Unpaid pref that compounds can quietly eat the common return.
• Where's the sponsor's own money? If they're thin in the common position, your interests aren't as aligned as the pitch suggests.

Read it as a line of people waiting to get paid, ask who's in front of you and how long the line is, and the jargon stops mattering. You're just deciding whether you like your spot.