What Is a Commitment Device?

The problem commitment devices solve

Every person who has ever set a New Year's resolution and abandoned it by February has experienced present bias: the tendency to value immediate comfort over future rewards. You know running is good for you. You know skipping the cake is good for you. In the moment, the sofa and the cake win.

A commitment device changes the immediate payoff. By attaching a real cost to failure now, it makes discipline the path of least resistance when the tempting moment arrives.

The Ulysses contract: the original commitment device

The term comes from the myth of Odysseus (Ulysses), who ordered his crew to tie him to the mast so he could hear the Sirens without steering the ship toward the rocks. He knew his future self would be irrational under the Sirens' influence, so his present self pre-committed to a constraint.

Behavioral economist Thomas Schelling formalized this concept in the 1970s, and it's been studied extensively since. The consistent finding: pre-commitment significantly improves follow-through, especially when the commitment includes both a cost for failure and social visibility.

Why financial stakes are so effective

Nobel laureate Daniel Kahneman and Amos Tversky's work on loss aversion established that losses feel approximately twice as painful as equivalent gains feel good. You would need to win €200 to feel as good as losing €100 feels bad.

This asymmetry becomes a powerful motivational tool when you put money on a goal. Every time you consider skipping a workout or procrastinating on a project, the prospect of losing the money you already paid is twice as motivating as the prize of succeeding.

Research by Dean Karlan at Yale found that commitment savings accounts — where people voluntarily locked in penalties for withdrawal — increased savings rates by 81% among participants. Similar mechanisms work for health goals, quitting smoking, and professional targets.

Why public accountability multiplies the effect

Social psychologist Robert Cialdini identified "commitment and consistency" as one of the six universal principles of influence. Once we publicly state a goal, we feel compelled to follow through — backing down would mean admitting we said something we didn't mean, which most people find uncomfortable.

Studies from the American Society of Training and Development found that people who have a specific accountability partner for a goal have a 65% chance of completing it. When they commit to that partner with a specific appointment or deadline, the number rises to 95%.

Real-world examples of commitment devices

• Deposit contracts: Betting money on losing weight, with the money going to charity (or a rival political party) if you fail.
• Public pledges: Announcing on social media or to a group of friends that you're training for a marathon.
• Automatic savings: Setting up a direct debit to a savings account the day your paycheck arrives.
• Deadline anchoring: Booking a non-refundable flight to force yourself to finish a project before leaving.
• Digital commitment platforms: Apps like PublicCommit that combine a financial stake with a public goal page visible to friends.

How to create an effective commitment device

Research points to four elements that make a commitment device most effective:

1. Specificity: "Run 5 km three times per week for four weeks" beats "get fit."
2. A meaningful stake: The cost of failure must hurt enough to matter. A token €5 might not move you; €50 probably will.
3. Public visibility: At least one other person who cares about you should know about the commitment.
4. A clear deadline: Open-ended commitments fade. A fixed check-in date creates urgency.