Why do they want a deposit today?
Because money already spent changes how you decide. Once people have paid, they tend to keep going to justify it. In a classic field study, theatre-season ticket buyers who paid more attended more plays [S19]. A deposit makes walking away feel like a loss, not a decision.
Evidence: only the mechanism is documented (playbook grade B). Psychology studies show the sunk-cost effect. We found no regulator or journalism source documenting this exact script.
In the room
"Just put down the deposit today to lock in your spot." Or the full amount, by card, at the table.
Composite example: You are not sure. The host says a small deposit holds your seat, and you can sort out the rest later. You pay. The next morning you have doubts, and the thought is that you have already put money in.
This is a teaching composite, not a description of any event.
Why it works
Sunk cost: past, unrecoverable spending still pulls on future choices [S19]. Loss aversion adds to it: losses weigh more than equivalent gains [S32]. The mechanism has its own page: Why does paying a deposit make it harder to walk away?.
A related technique is the low-ball: win the agreement first, reveal costs later. People who agreed before learning the cost were more likely to go through with it [S20].
Caveat: the theatre study is a single classic field study. It supports the mechanism, not a rate of effect at live events.
Your move
Frequently asked questions about deposits
Is a deposit really "just to hold my spot"?
Maybe. The words do not tell you what it commits you to. Ask what it holds, what it costs to leave, and where that is written.
Should I stay in because I have already paid a deposit?
Not for that reason. The money is spent either way. The question is whether the whole offer is worth the rest of the price. Treat the deposit as a cost already paid, not as a reason to continue.
What to do next
Who writes this site
Coached Into Debt is written by the site itself, with no personal byline.
Sources
- S19 Arkes, H. R. and Blumer, C. (1985), The psychology of sunk cost · Organizational Behavior and Human Decision Processes 35(1), 124-140 · doi.org · accessed 2026-10-27
- S20 Cialdini, R. B., Cacioppo, J. T., Bassett, R. and Miller, J. A. (1978), Low-ball procedure for producing compliance: commitment then cost · Journal of Personality and Social Psychology 36(5), 463-476 · doi.org · accessed 2026-10-27
- S32 Kahneman, D. and Tversky, A. (1979), Prospect theory: an analysis of decision under risk · Econometrica 47(2), 263-291 · doi.org · accessed 2026-10-27