Why staying in a book you hate feels almost impossible — the money and hours behind you are gone either way, but they still pull you forward

You are three chapters from the end of a book you stopped enjoying, and you keep turning pages anyway. Maybe it is a project at work that clearly will not pan out, yet you give it one more week. That pull to keep going is not a character flaw. Psychologists have a name for it: the sunk-cost fallacy — and letting go of it is one of the hardest mental skills a person can build. So why does something as simple as stopping feel almost impossible?

Before the sections open, the figures this page stands on — each one carrying its own source.

What is the sunk-cost fallacy?

The sunk-cost fallacy is the urge to keep pouring in effort because of what you already spent. The money, hours, and energy behind you are gone either way. Still, they tug you forward. A clear-eyed choice looks only at what happens next — the extra cost weighed against the likely payoff. The fallacy drags the past into a decision where it has no business being.

Economists call that past spending a sunk cost. It cannot be recovered, no matter what you do now. Naming it does not make it easy to ignore. Peer-reviewed research keeps returning to this exact gap — the space between knowing better and acting on it. That gap is the whole problem, and it shows up in almost everyone.

Why does walking away feel so hard?

Much of the pull is emotional, and it fires before logic gets a word in. A 2019 study looked at how feelings drive the trap. Researchers gave people two kinds of scenarios and scored how strongly they clung. In the invest scenarios — where quitting meant abandoning an active bet — the grip was tighter, with a mean score of 3.74. The non-invest scenarios scored 4.34, a looser hold. Lower numbers meant a stronger pull to keep going. The feeling of throwing good money after bad, as the researchers described it, is a gut reaction first.

Size matters too. A separate 2018 study tested different amounts of sunk cost against each other. The four levels differed in a meaningful way (F = 6.73, p < 0.01). Put simply, the more you have already put in, the harder your mind fights to keep going. That is why the last chapter of a long book feels harder to close than the first.

The page has been saying memory has a ceiling. The ferry below finds yours, one passenger at a time.

Do we treat wasted time and wasted money the same?

Here is where it gets strange. A 2023 registered report revisited a classic finding about time versus money, and the split it found is sharp. When people had sunk money into a ticket, most stuck with the plan — about 61.7% preferred the theatre performance. When they had sunk time instead, only 4.8% did. Wasted money grips us hard. Wasted time, oddly, slips through our fingers more easily.

The gap between sunk money and sunk time is stark once you line the two up.

That difference matters for everyday life. The book you abandon cost you hours, so it should be easier to drop than money suggests. Yet the finish-it feeling still lingers — a reminder that the fallacy does not always play by tidy rules.

The sunk-cost trap in luxury cars and NFL rosters

None of this stays inside a lab. Look at drivers of the world’s costliest cars. Using Singapore data, a 2018 study found people drove more simply because the car cost so much up front — about 86 kilometers per month more, or 5.6%. The car was already paid for. The extra driving changed nothing about that price. It was the sunk cost doing the talking.

Sports teams fall into the same pattern. A 2016 study of the National Football League found that a 10% rise in a player’s salary-cap value came with 2.7 more games started, for players drafted near the round-one cutoff. Coaches kept playing the pricey picks, even when a cheaper option might have earned the spot. The bias reaches from your reading chair all the way to a professional sideline.

Across cars and contracts, the same bias leaves a mark you can measure.

A page should show its load-bearing numbers plainly. These are this one’s, receipts attached.

Does how the choice is framed change your answer?

The wording around a decision quietly tips it. A 2018 study framed the same choice two ways. When escalating — putting in more — was presented as the active step, people escalated more than when pulling back was the active step (d = 0.62). Nothing about the underlying facts changed. Only the framing moved, and behavior followed. That means a small shift in how you ask yourself the question can shift the answer.

This is worth sitting with. If the setup of a moment can push you toward sinking more, you can also set the moment up to help you stop. The frame is not fixed. You get some say in it.

A page should show what it grows from. Here is the tree — every leaf quoted, every receipt attached.

Can you train yourself out of the sunk-cost trap?

There is real, hopeful news here. A 2015 study asked whether handing a decision to a computer system helps a person escape the pull. It did. Delegating to IT cut the chance of the sunk-cost effect by more than 50%. Distance from the emotional weight of past spending made the next call much cleaner. You do not need software to borrow the lesson — a trusted friend or a cooling-off day can create similar distance.

Attention plays a role as well. A 2021 study found that whether people react to sunk costs depends on where their focus lands, with average ratings sitting around 2.7. Point your attention at what comes next, and the past loosens its hold. Point it backward at all you spent, and the grip tightens. Focus is a lever you can actually reach for.

So why does stopping feel impossible? Because the choice is emotional, the past feels like a promise you owe, and the wording of the moment tilts the scale. Seeing those three forces plainly is the first handhold out.

Remember the note you left? It has been waiting for you.

Common questions about quitting and sunk costs

A handful of questions come up again and again once people spot the pattern in their own lives.

And if a nerve got touched just now, the help below is real and free, open at any hour.

How to get better at walking away

Walking away well is a skill, and skills grow with practice. Notice the pull the moment it starts. Say the sunk cost out loud — the money, the hours, the effort already gone. Then ask one plain question: if I were starting fresh today, with nothing yet spent, would I still choose this? That single question is what the research keeps circling back to, across cars and contracts and half-read novels. Master it, and quitting the right things stops feeling like failure and starts feeling like judgment.

One more thing before you go. Fold this page into a single sentence of your own — the when and the how, decided now.

In the same open spirit as the receipts above: here is how the page was built, device by device.

This is general information about the mind, not therapy or a diagnosis. If things feel hard, please consult a professional. In a crisis, reach a free, confidential crisis hotline right away; findahelpline.com lists one for your country.