Sunk Cost Fallacy: What You Paid For Isn’t a Reason to Stay

Every firm has a file that won't close. For a public adjusting firm, it's the claim that has gone through round after round of supplements and reinspections, long past the point where it should have gone to an attorney. For a first-party law firm, it's the case headed toward trial when the realistic outcome, weighed against the cost of getting there, said settle months ago. The team keeps going because of everything already invested, not because the next hour has a better shot. The same owner is often paying for office space sized for the firm they want to be. That's the sunk cost fallacy in business: letting what you've already spent decide what you spend next. It does its worst damage in a crisis.

This is article four of a seven-part series pairing each phase of the 7Seas of Entrepreneurship with the cognitive bias that shows up there most often.

The Sinking Sea Is a Gale

The Sinking Sea is where a crisis strips the business down to what's essential. It almost always arrives from outside: a market change, the loss of a major referral source, a health event, or cash runway that suddenly looks short. Sinking carries the same four elements as Stalling, but in the opposite weather. Stalling is light air, where the answer is more sail. Sinking is a gale, and the answer is to reef, deliberately carrying less canvas so the boat survives the wind and can still steer.

The framework names the mistake that ends businesses in this Sea: adding sail. That means launching something new, spending heavily on marketing, or taking any work at any price to outrun the storm. The sunk cost fallacy produces a quieter version of the same mistake. Nothing new goes up, but sail that should have come down stays up, because of what it cost to raise it.

What the Research Says About the Sunk Cost Fallacy in Business

Psychologists Hal Arkes and Catherine Blumer ran one of the cleanest tests of it in The Psychology of Sunk Cost in 1985. They randomly gave some buyers of a university theater's season tickets a discount, while others paid full price. Over the first half of the season, the full-price buyers attended noticeably more plays. Everyone's money was already spent. The people who had spent more simply felt more bound to get their money's worth.

Organizational psychologist Barry Staw found the business version a decade earlier in a study he titled Knee-Deep in the Big Muddy. When people were personally responsible for an investment decision that turned out badly, they put more money into it afterward than people who had inherited the same bad decision from someone else. Staw called it escalation of commitment. The bad result didn't make people pull back. It made them double down to prove the original call right.

Both studies point to the same rule, and it's simple to say and hard to follow. The money and hours already spent are gone either way. The only question that matters is what the next dollar or hour will buy.

The File That Won't Close

In a public adjusting firm, the sunk cost version is holding a file too long. The claim has been through every supplement, every reinspection, and every round of back-and-forth with the carrier, and it's still stuck. The firm keeps working it because of everything already in it, when the client's best path may be an attorney. Passing the file to a lawyer in a timely manner isn't giving up on the client. Waiting too long can cost the client time and leverage, and it costs the firm hours it doesn't get back.

In a first-party law firm, the version is pushing toward court without honestly weighing the cost of getting there against the realistic chance of winning. Expert fees climb, litigation costs climb, and the case picks up momentum of its own. Settling for a client can be the better outcome for that client, but a firm that has already invested heavily finds it hard to recommend.

What breaks the cycle in both cases is communication. Some public adjusters and attorneys see handing off a file or recommending settlement as failing the client. It isn't. The client decides whether to settle, and the firm's job is to give an honest read on what more time and money are likely to produce. A firm that tells a client the truth about where a file stands is serving the client. A firm that keeps going because it can't admit the hours are gone is serving its own sunk cost.

In a Sinking stretch, the cost to the firm compounds. Every hour on a stuck file is an hour another file didn't get, and in a crisis those hours are scarce. The longer-term fix shows up at intake, where the lessons from the files that ran long help screen the next ones before they're signed.

The Office You Opened to Look Bigger

The other version I see often is space. The firm signed a lease for an office sized for the firm the owner wanted to become, or built out a location that said "we've arrived" to clients and competitors. When a crisis hits, that lease becomes one of the heaviest costs on the books, and the owner keeps it because of what went into it: the deposit, the build-out, the furniture, and the image.

That last one is the hardest to say out loud. Often the space is protecting the owner's sense that the firm is larger than it actually is. Letting it go feels like admitting the firm shrank, so the owner carries the cost of the image straight through the storm. The 7Seas framework gives one of the clearest signals that a firm is ready to leave the Sinking Sea: the owner can say out loud what they will not rebuild. Sunk cost is what keeps that sentence from being said.

One overlap is worth naming because it changes what you should watch for. Plenty of these leases were signed during a good year, under the halo effect from week two of this series, when growth made the decision look smarter than it was.

What a Firm That Reefs on Purpose Looks Like

The 7Seas framework describes the signals that a firm is coming out of the Sinking Sea. Cash stabilizes at any level, however low. The owner can plan past this week again. And the owner can name what won't be rebuilt.

At the firm level, it looks like this. Files get firm time based on what more time can still win, and someone owns that call. Public adjusting files move to an attorney when the client needs one, not when the firm runs out of patience. Law firm cases get an honest cost-versus-outcome read, and the client hears it plainly. The office fits the firm the business actually is this year. And the conversations that used to feel like failure become routine parts of how the firm serves clients.

Seeing the Fallacy Is Free. Deciding What to Carry Is the Work

Knowing about the sunk cost fallacy won't make the lease or the stuck file any easier to let go of. Building the financial footing and the decision habits that let a firm make those calls before a crisis forces them is what we cover in Below the Waterline, TAA's online course for owners who want a foundation that holds in bad weather. If you're carrying something right now only because of what it already cost, start there.

Next article, the series moves to the Shifting Sea, where owners choose to change course and confirmation bias makes sure they only hear from people who agree.

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