Capital Structure

Look at any Balance Sheet. The right side shows two things: liabilities (what you owe) and net worth (what owners put in, plus accumulated Profit). Capital Structure is the ratio between these two - how much of your Assets are funded by borrowed capital versus owner capital.

Every business makes this choice, whether deliberately or by default. A company with $10M in Assets might have $7M in liabilities and $3M in net worth, or $2M in liabilities and $8M in net worth. Both companies own the same $10M in Assets. But they face radically different P&L pressures, Cash Flow constraints, and risk profiles.

The simplest way to think about it: Leverage is rented capital - you pay interest for its use and return the principal balance over time. Owner capital is permanent capital with a variable price: the Returns owners expect. Capital Structure is how you blend these two.

Capital Structure shows up in your Operating Statement every single period, in ways that constrain what you can actually do as an Operator:

1. Fixed Obligations on your P&L. Borrowed capital creates interest payments and principal balance repayment that hit your Cash Flow whether Revenue grows or shrinks. More Leverage means more of your EBITDA is spoken for before you decide where to allocate it.

2. Cash Flow flexibility. When EBITDA dips - and it will - your Leverage payments do not dip with it. An Operator with minimal borrowed capital can cut costs and ride out a bad quarter. An Operator who owes 60% of EBITDA in interest and principal balance payments has no room to maneuver.

3. Control. Bringing in outside owner capital means sharing decisions. Leverage from a bank does not change who controls the business - as long as you make payments. But miss those payments, and the lender can force Liquidation Discounts on your Assets, trigger Bankruptcy, or seize Collateral. Both paths constrain you, just in different scenarios.

4. Valuation and future Capital Investment. Your Capital Structure determines your Hurdle Rate - the minimum return any new project must clear. More Leverage means higher Fixed Obligations, which means each new investment must generate more Cash Flow just to justify itself. This directly shapes which Capital Budgeting decisions you can say yes to.

Capital Structure has two levers. Understanding each one's true cost - in total Cash Flow, not just the interest rate - is the entire game.

Borrowed Capital (Leverage)

You take a loan. The cost has two components: interest (the fee for using someone else's capital) and Amortization (returning the principal balance over the loan term). If you borrow $1M at 8% over 10 years with equal annual principal balance payments, you owe $100K/year in principal plus $80K in Year 1 interest (declining each year as the principal balance shrinks). Your total Year 1 Fixed Obligation is $180K - not $80K.

Advantages:

• •Total cost is capped and terminal. Once the principal balance reaches zero, your obligation ends entirely. If EBITDA doubled during the loan term, you still paid the same total.
• •You keep 100% ownership and control.
• •Interest costs reduce your taxable Profit, which lowers your Tax Assessments.

Risks:

• •Payments are mandatory. Miss them and you face Cost of Default - Late Fees, damaged Credit Score, potential Bankruptcy.
• •Lenders often require Collateral and set limits on how you run the business.
• •Creates Debt Spiral risk: if Cash Flow drops, you might need to borrow more to cover existing payments.

Owner Capital (Net Worth)

You fund the business from owner savings, or bring in an outside investor who contributes capital in exchange for an ownership stake.

Advantages:

• •No Fixed Obligations. If EBITDA drops to zero, you do not owe owner capital a payment.
• •Provides a Cash Flow cushion during a Market Downturn.
• •Increases Liquidity on the Balance Sheet, giving you options.

Costs:

• •Owner capital is not free - it carries an opportunity cost. Money invested here could earn Returns elsewhere. If your business earns 10% and the Expected Market Return is 12%, you are destroying value.
• •Outside investors own their share permanently. If you sell 25% for $1M and Enterprise Value later reaches $20M, that 25% stake is worth $5M. No amount of success eliminates their ownership.
• •The timing of equity cost depends on distribution. If EBITDA is distributed to owners each period, the investor takes their share in cash immediately. If EBITDA is reinvested into growth (as many growing companies do), the investor takes no cash during operations - their Returns come at exit, when the business is sold. Either way, the ownership percentage is permanent. Debt ends. Equity does not.

The Blend

Most businesses use both. The question is the ratio. If you have $10M in Assets, $6M in liabilities, and $4M in net worth, your Capital Structure is 60% borrowed / 40% owner capital.

The right blend depends on three things:

• •Cash Flow stability. Predictable Revenue (like SaaS with low Churn Rate) supports more Leverage because you can reliably cover Fixed Obligations including principal balance repayment.
• •Risk Tolerance. More Leverage amplifies both Returns and losses. Higher risk appetite allows a more aggressive structure.
• •Growth plans. Rapid Capital Investment may require preserving Liquidity and Cash Flow flexibility, tilting toward owner capital.

Capital Structure is not a one-time decision. It is a standing question you revisit at every major inflection:

• •Funding a new Capital Investment: Do you borrow, use accumulated Profit, or bring in new owner capital? Run the numbers on total Cash Flow impact - including principal balance repayment for borrowed capital, and ownership dilution for owner capital.
• •Acquiring another business (M&A due diligence): Most acquisitions are funded with a mix of Leverage and owner capital. The ratio determines how much EBITDA the acquired company must generate to service both interest and principal balance - this is the core of LBO Modeling.
• •Navigating a downturn: If Revenue drops and your Leverage ratio is high, you may need Refinancing, converting borrowed capital to owner capital, or selling Assets to reduce liabilities. These are expensive moves under pressure.
• •Preparing for an exit: Buyers and PE-Backed acquirers look at your Capital Structure to assess risk. Too much Leverage signals fragility. Too little may signal you are not optimizing Returns on owner capital.

decision rule: Calculate your total annual Fixed Obligations (interest plus principal balance payments). If your EBITDA divided by that total is at least 2-3x even in your worst realistic quarter, you can support more Leverage. If EBITDA is volatile, lean toward owner capital and preserve Liquidity.

Capital Structure sits directly on top of your Balance Sheet knowledge - it is literally the question of how the right side of the Balance Sheet is composed. Where the Balance Sheet shows you the snapshot (Assets = liabilities + net worth), Capital Structure is the deliberate choice about that ratio and what it means for your operating reality. It also extends Leverage from a concept into a decision framework: you already know that Leverage amplifies gains and losses, and Capital Structure gives you the tools to reason about how much Leverage to take on by stress-testing Cash Flow scenarios against total Fixed Obligations - interest plus principal balance repayment, not interest alone. The principal balance component connects directly to Amortization - understanding how the principal balance shrinks over time is essential for projecting when your Fixed Obligations decrease and your Cash Flow frees up. Downstream, Capital Structure feeds directly into LBO Modeling (how PE-Backed acquisitions are structured with heavy Leverage against stable Cash Flow), Hurdle Rate (the minimum return new investments must clear, which depends on what you pay for capital), and every Capital Budgeting and Capital Allocation decision you will face as an Operator. When someone says a company is 'overleveraged,' they are making a Capital Structure judgment - that the total Fixed Obligations relative to EBITDA are too high for the Cash Flow to reliably support.