A founder lands a deal that will double the company, if she can fund the next eighteen months of hiring. She can spend the cash already in the bank, take a loan, or sell a slice of the business to investors. Each choice changes who she answers to, what she owes when times get hard, and how much of the upside she keeps. This is the whole of capital raising in one decision, and most leaders make some version of it long before they have a finance team to ask.

The quick version

  • Three sources, one ladder. Companies fund growth from internal cash first, then debt, then new equity, the order most firms actually follow.
  • Debt is cheaper but stricter. Interest is tax-deductible and lenders don't own you, but the repayments are owed whether you have a good year or a terrible one.
  • Equity is patient but expensive. Investors share the risk and ask for nothing back in a bad year, in exchange for a permanent share of the upside and a say in the business.
  • Treasury is the unglamorous half. Raising money is an event; making sure you never run out of it is the daily job. Most companies that fail were profitable on paper and simply ran out of cash.

The idea in depth

Start with the cleanest finding in all of corporate finance, because it tells you what doesn't matter so you can focus on what does. In 1958, economists Franco Modigliani and Merton Miller proved that, in a perfect market with no taxes, no bankruptcy, and no information gaps, how a firm splits its funding between debt and equity has no effect on its total value (the Modigliani–Miller theorem). The value comes from the assets and the cash they throw off, not from the paperwork wrapped around them.

That sounds useless until you read it the right way. Capital structure matters in the real world precisely because of the things M&M assumed away: taxes, the cost of going bust, and the fact that managers know more than outside investors do. So your financing choice is really a deliberate trade between those three frictions, not a fashion to copy from whoever raised last. Worth saying plainly: the original theorem is a thought experiment, not advice. Reading "leverage doesn't matter" as a real-world rule is how firms borrow themselves into trouble.

flowchart TD
    A(["Need to fund growth?"]) --> B(["Spend internal cash
(retained earnings)"])
    B -->|"Not enough"| C(["Issue debt
(loan / bond)"])
    C -->|"Still short, or too risky"| D(["Issue new equity
(private round / IPO)"])
    B -.->|"cheapest, no dilution"| E(["Order most firms
actually follow"])
    C -.->|"cheap, but obliged to repay"| E
    D -.->|"most expensive, dilutes owners"| E
The financing ladder, after Myers & Majluf's pecking-order theory. Leaders Loop

Why order matters more than ratio

If M&M tells you the split is less important than people think, the next idea tells you the sequence is more important than people think. In 1984, Stewart Myers and Nicolas Majluf set out the pecking-order theory: because managers know more about the firm's real prospects than investors do, every funding source carries a different "trust tax." Internal cash carries none, you spend your own money and signal nothing. Debt carries a little: lenders demand interest, but the obligation is capped and they don't second-guess your story. New equity carries the most, because rational investors assume you'd only sell shares when you think they're overpriced, so they discount what they'll pay.

The evidence for that "trust tax" is unusually direct. When mature public companies announce a new share issue, their stock price tends to fall on the news. The classic study, Paul Asquith and David Mullins in the Journal of Financial Economics, 1986, found an average drop of roughly 3% for industrial firms on the announcement day alone. Investors read "we're selling equity" as a quiet signal that insiders think the shares are dear. The practical takeaway: exhaust cheaper, less-revealing funding before you dilute owners, and when you do raise equity, over-communicate why, so the market doesn't fill the silence with the worst interpretation. None of this is a law, though. The pecking order describes tendencies. Fast-growing firms with no profits and no assets to pledge often must raise equity early; for them the ladder is upside down, and that's fine.

What leaders actually optimise for

Theory predicts firms will load up on debt to capture its tax break. Real finance chiefs mostly don't, and the gap is instructive. When John Graham and Campbell Harvey surveyed 392 chief financial officers (Journal of Financial Economics, 2001), the single most important factor in their debt decisions wasn't the tax shield at all. It was financial flexibility, keeping enough headroom to weather a bad year without having to shrink the business, followed by their credit rating and the volatility of their cash flow. The tax benefit that theory prizes ranked well down the list.

"Raising money is an event. Not running out of it is the job."

That instinct is the bridge to treasury, the discipline of managing the cash itself. Size your borrowing against your worst plausible year, not your forecast one, and treat unused borrowing capacity as a strategic reserve rather than waste. Hold a cash buffer, stagger when debts fall due so they don't all land in the same quarter, and know your real runway in months, not vibes. But flexibility has a price. Cash sitting idle and debt left unused both drag on returns, so "be safe" isn't a free answer, it's a trade you make with eyes open, revisited as conditions change.

A worked example

All figures below are illustrative, chosen to show the mechanics, not a real company.

Meridian Tools is a profitable manufacturer that needs £10m to open a second factory. It has £3m of spare cash. Following the ladder, the founder spends that first, no dilution, no interest, no signal. That leaves £7m to find.

Option A, borrow it. A bank offers a £7m loan at 8% interest. The yearly interest is £560,000, and because interest is tax-deductible, at a 25% tax rate the real after-tax cost is about £420,000 a year. The founder keeps 100% of the business and all of the upside. The catch: that £560,000 is owed every single year, boom or bust, plus repayment of the principal. The loan also comes with covenants, promises to the lender (say, "keep debt below three times annual profit") that, if broken in a bad year, can let the bank demand its money back at the worst possible moment.

Option B, sell equity. Investors will put in £7m for 30% of the company. There are no repayments and nothing owed in a bad year, the risk is genuinely shared. But the founder has permanently given away 30% of all future profits and a real say in decisions. If Meridian is worth £100m one day, that slice cost £30m to raise £7m. Equity is the most expensive money there is; it just doesn't send you a bill.

flowchart LR
    A(["£7m needed"]) --> B(["Option A: Debt"])
    A --> C(["Option B: Equity"])
    B --> B1(["Keep 100% ownership"])
    B --> B2(["Fixed repayments
+ covenants, good year or bad"])
    C --> C1(["No repayments,
risk shared"])
    C --> C2(["Give up 30% of all
future upside + control"])
The same £7m, two very different obligations. Leaders Loop

The IPO, an initial public offering, where a company sells shares to the public for the first time, is Option B at full scale, with a twist worth knowing. IPO shares are routinely priced below where they trade on day one: across US listings from 1980 to 2025, the average first-day "pop" was about 19%, per the data maintained by University of Florida finance professor Jay Ritter (in 2025 it ran hotter, near 29%). That gap is real money the company didn't raise, Ritter calls it "money left on the table." For Meridian, the lesson is humbler: there is no free or frictionless way to raise capital. Every door has a toll, and the leader's job is to pick the toll that fits the road ahead.

Frequently asked questions

Is debt or equity better?

Neither, in the abstract, it depends on the certainty of your cash flow. Steady, predictable earnings can carry debt safely, and debt is cheaper because lenders take less risk and interest is tax-deductible. Volatile or pre-profit businesses lean on equity, because investors share the downside that fixed repayments would otherwise force onto a fragile firm. The wrong answer is to copy whoever raised most recently.

What is treasury, exactly?

Treasury is the day-to-day management of a company's money: making sure there's enough cash to pay bills, deciding when debts fall due, holding a buffer for surprises, and managing risks like interest rates and currency. Raising capital fills the tank; treasury makes sure the engine never stalls. Plenty of profitable companies have failed simply by running out of cash at the wrong moment.

Why would a company raise money it doesn't need yet?

Because the cheapest time to raise is when you don't need it. Lenders and investors offer the best terms to firms that look strong and unhurried; the same firm, desperate, gets punished. The Graham–Harvey survey found financial flexibility, keeping that headroom, was the top concern of real finance chiefs, ahead of the textbook tax advantages of debt.

Does selling shares mean losing control?

Partly, and it's a matter of degree. Sell a small minority and you mostly keep control; cross 50% and you can be outvoted. Even minority investors usually negotiate rights, board seats, vetoes on big decisions, so the real cost of equity is rarely just the percentage. Read what control you're giving up, not only what ownership.

Why are IPO shares deliberately underpriced?

A first-day price jump rewards the investors who buy in early, helps the offering sell out, and lowers the bank's risk of being left holding unsold stock. The cost falls on the company, which raises less than it might have, Ritter's long-run US data puts that "money left on the table" at roughly a fifth of the share price on average. It's a known, accepted friction of going public, not a mistake.

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