A glowing purple-to-teal light trail runs through the center of a balanced tower of a strongbox, bundled cash, and a single invoice, illustrating how a capital stack holds together when each layer is matched and aligned by permanence.

Forming the Stack: Building Capital That Holds Together

September 01, 2026•9 min read

Forming the Capital Stack | Part Two of Three

Matching the Money to the Gap matched a single need to a single kind of capital. A real business is never that simple. At any moment it has several needs running at once: an ongoing working capital requirement, a piece of equipment to replace, a season to build for, sometimes a one-time opportunity that will not wait. Each has its own shape and its own duration, and each calls for its own matched capital. The capital stack is how you fund all of them together so the pieces support the business instead of pulling against each other.

A stack is not a pile of loans. It is a designed structure, layers of capital arranged so that each need is funded by money that fits it, and so the whole holds under pressure. Build it well and the business funds everything it is doing on terms it can carry. Build it badly, by stacking whatever money arrived whenever it arrived, and the business ends up over-obligated in the near term and underfunded in the long, which is its own kind of trap. This article is about building it well.

Key Points

The capital stack is the full set of a business's funding, designed as layers, each matched to a need by shape and duration, arranged so the whole structure holds.
The layers sort by permanence. Long-lived and permanent needs sit at the base on long or permanent capital; cyclical needs sit above on capital that draws and repays with the cycle; one-time needs get short, matched money.
The size of the whole stack is governed by one thing: repayment capacity, the cash the business actually generates to service its debt. The stack is built within that capacity, not beyond it.
Repayment comes from the cash a need produces, never from equity. If a stack can only be serviced by drawing down the owners' capital, it is mismatched or oversized, not funded.
Which specific instruments fill each layer, and how they integrate, is the subject of the next series. This one is about the shape of the structure, not the parts that fill it.

What Is a Capital Stack?

Picture every dollar of outside capital a business uses, arranged not by when it was raised but by the job it does. At the base sit the long-lived needs: the equipment, the property, the permanent increase in working capital a larger business now carries. These are funded by long or permanent capital, money that repays over years or does not come due until the business chooses. Above them sit the cyclical needs, the seasonal builds and the ordinary swings of the operating cycle, funded by capital that draws when the need appears and repays when it passes. At the top sit the short, one-time needs, funded by short, matched money that clears quickly.

That arrangement is the stack. Each layer is matched, in the sense of the last article, to the shape and duration of the need it funds. And the layers are ordered by permanence, so the money that has to be there for years is the money that stays for years, and the money that comes and goes matches needs that come and go. A stack built this way funds the whole business without any single layer being asked to do a job it is the wrong shape for.

Why Does the Order of the Layers Matter?

Because a mismatch between a layer and its need is exactly the error the last article warned about, now multiplied across a whole business. If a permanent need is funded from the cyclical layer, with short money that keeps coming due, the business refinances forever and pays for the privilege. If a short, one-time need is funded from the permanent layer, with long capital that cannot easily be repaid early, the business carries expensive long money against a need that ended months ago.

The order protects against both. Put the permanent needs on permanent capital and they are funded once and left alone. Put the cyclical needs on cyclical capital and the money is there when the season demands it and gone when the season passes, so the business is not paying to hold money it is not using. The discipline is simple to state and easy to violate under pressure: never fund a long need with short money, and never lock up short needs in long money. A well-ordered stack is just that discipline, applied to every need at once.

How Big Should the Whole Stack Be?

Here is the governor on the entire structure, and it is the single most important number in funding a business: repayment capacity. Repayment capacity is the cash the business actually generates, after everything it must spend to keep running, that is genuinely available to service debt. It is not profit, and it is not EBITDA, both of which sit above the real claims on cash. It is the cash that survives to make a payment.

The whole stack is built within that capacity, never beyond it. A business can match every layer perfectly and still fail if the total it owes each period exceeds the cash it generates to pay it, because a matched but oversized stack is still oversized. So repayment capacity is read first, before the stack is designed, and it sets the ceiling the whole structure must fit under. This is why a lender reads the cash a business produces before it reads anything else, and why an owner who wants to fund well reads it first too. Design the layers to the need, and size the whole to the capacity. Both, or neither works.

What Repayment Should Never Come From

One rule follows directly from reading repayment capacity first, and it is worth stating plainly because breaking it is how solvent businesses hollow themselves out. Debt is repaid from the cash the need produces, never from the owners' equity.

Equity is not a repayment source. It is the owners' stake in the business, and drawing it down to make debt payments does not fund the business, it consumes the business to service its financing. When a stack can only be kept current by pulling from equity, the signal is not that the business needs to dig deeper. The signal is that the stack is mismatched or too large for the cash the business generates, and the answer is to rework the structure, not to feed it from the owners' capital. A sound stack services itself from the cash its needs produce. A stack that eats equity is telling you it was built wrong.

The Structure Is Ready. Now It Has to Be Funded.

You now have the shape of a sound capital structure: needs matched to capital by shape and duration, layered by permanence so each is funded by money that fits it, and the whole sized to the cash the business actually generates to repay it, never to the owners' equity. That is the design.

Design alone does not guarantee it gets funded, and certainly not on the terms it deserves. A lender does not fund the structure you know is sound. It funds the structure it can see, and a perfectly matched, perfectly sized stack can still be turned down, funded slowly, or funded at a worse price, if the business cannot be read easily by the people deciding whether to fund it. Designing the stack this way, matching and layering and sizing to repayment capacity, is the Capital Intelligence Method™ applied to how a business is funded. A Capital Intelligence Report designs the structure this same way. What the design alone does not yet guarantee is how it will be read. Becoming the business that gets funded well is where we go next.

Frequently Asked Questions

What is a capital stack?

It is the full set of a business's outside capital, designed as layers rather than accumulated as a pile. Each layer is matched to a need by its shape and duration, and the layers are ordered by permanence: long-lived and permanent needs at the base on long capital, cyclical needs above on capital that draws and repays with the cycle, short one-time needs at the top on short money. Built this way, the stack funds everything the business is doing on terms it can actually carry.

How do you decide the size of a capital stack?

By repayment capacity, the cash the business generates that is genuinely available to service debt after everything it must spend to keep running. This is not profit or EBITDA, both of which sit above the real claims on cash. The total the stack requires each period must fit under that capacity, so repayment capacity is read first and sets the ceiling the whole structure is designed within. A perfectly matched stack that exceeds repayment capacity is still oversized.

Why should debt never be repaid from equity?

Because equity is the owners' stake in the business, not a source of repayment. Servicing debt by drawing down equity does not fund the business, it consumes it to pay for its financing. When a stack can only be kept current by pulling from equity, that is a signal the structure is mismatched or too large for the cash the business generates, and the correct response is to rework the stack, not to feed it from the owners' capital. A sound stack repays itself from the cash its needs produce.

What is the difference between matching and forming the stack?

Matching fits one kind of capital to one need, by shape and duration. Forming the stack applies that discipline across all of a business's needs at once, layering the matched pieces by permanence and sizing the whole to repayment capacity, so the entire structure holds together. Matching is the principle for a single need; forming the stack is the design for the whole business.

A Capital Intelligence Report designs your own stack this same way, matched, layered, and sized to what your business can actually repay. An advisor takes it from there. See what your own numbers actually show.