Ghada Ismail
Imagine you're building a skyscraper. Every floor relies on the strength of the one beneath it. Startup financing works pretty much the same way. A business isn't funded by one cheque or one investor; it is built layer by layer using different types of capital, each with its own level of risk, reward, and priority.
That layered structure is known as the capital stack, and it's one of the most important concepts every founder should understand before raising money.
Think of a capital stack like a layered cake
Let’s say you're building a company worth SAR 10 million. The money that financed that company didn't necessarily come from one source.
Instead, it may have been assembled from different layers:
- Founders' own money
- Friends and family
- Bank loans
- Venture capital
- Government financing
- Revenue generated by the business
Together, these funding sources form the company's capital stack.
In short, a capital stack is the combination of all the money a business uses to finance its operations and growth.
The order of these layers also determines who gets paid first if the company is sold or liquidated.
Why does the order matter?
Because not every investor takes the same level of risk, those who take less risk usually receive lower returns but get paid first. While those who take the biggest risk expect higher returns but are paid last.
A simplified capital stack looks like this:
- Senior Debt
- Junior or Mezzanine Debt
- Preferred Equity
- Common Equity (Founders and shareholders)
The higher you are in the stack, the safer your investment.
The lower you are, the greater the risk, but also the potential reward.
Breaking down each layer
Senior Debt
This is usually the safest form of financing. Think of bank loans or financing from traditional lenders. Because these lenders expect repayment regardless of how well the business performs, they often require collateral and receive priority if anything goes wrong. The trade-off? Interest rates are generally lower because the risk is lower.
Mezzanine Debt
This sits between debt and equity. Mezzanine financing is riskier than bank debt but safer than equity. It often comes with higher interest rates and sometimes gives lenders the option to convert part of the loan into company shares later. Growing companies sometimes use mezzanine financing when they need more capital but don't want to dilute ownership too much.
Preferred Equity
Preferred shareholders own part of the company but receive special rights. For example, they may get paid before ordinary shareholders when dividends are distributed or if the company is acquired. Many venture capital firms invest through preferred shares because they offer additional protections while still allowing investors to benefit from future growth.
Common Equity
This is where founders, employees with stock options, and ordinary shareholders sit. They own what's left after everyone above them has been paid. That sounds risky, but if the company becomes highly successful, common shareholders often enjoy the largest financial upside.
That's why startup founders are willing to take this position.
A startup example
Imagine a Saudi startup raises SAR 12 million to expand.
The funding might look like this:
- Founders invest SAR 2 million
- A bank provides SAR 3 million
- A venture capital fund invests SAR 7 million
The capital stack now contains both debt and equity.
If the startup eventually succeeds and is sold for SAR 100 million, everyone gets paid according to their position in the stack. If the company struggles, the bank is usually repaid first, while founders are last in line.
Why founders should care
Many entrepreneurs focus only on how much money they can raise, while experienced founders think about where that money comes from. It’s also important to know that every financing option changes the capital stack. Too much debt may increase repayment pressure. Meanwhile, giving away too much equity reduces ownership and future upside. So, the best capital stack is the one that balances growth with financial flexibility.
As startups mature, their capital stacks often become more sophisticated, combining venture capital, venture debt, revenue-based financing, government programs, and traditional lending.
Choosing the right mix can lower financing costs while preserving founder control.
To Wrap Things Up…
A capital stack isn't just a finance term; it's rather a roadmap showing who has invested in your company, how much risk each party has taken, and who gets paid first when value is created.
For founders, understanding the capital stack means making better fundraising decisions instead of simply accepting the first available source of capital.
After all, raising money isn't just about getting funded. It's about building the right financial foundation for long-term growth.