Commitment Devices
6 min read
A commitment device is a self-imposed mechanism that increases the cost of failing, removing the decision-making burden from your future self. Rather than relying on willpower in the moment of temptation, you pre-decide and make deviation expensive: financially, socially, or psychologically. You bind your future actions before impulses can derail you, much like Odysseus tied to the mast to avoid the Sirens.
Commitment devices work by turning a behavior choice into a resolved issue. When temptation strikes, you don't decide whether to pursue the behavior. The decision is already made, and reversing it now costs something real. This shifts the mental challenge from "should I do this?" to "do I want to pay the cost of backing out?"
The Science Behind It
Behavioral economists have documented that humans systematically fail to follow through on intentions due to present bias. We undervalue future consequences compared to immediate gratification. Giné, Karlan & Zinman (2010) conducted a randomized controlled trial of smokers attempting to quit. Participants who created commitment contracts with financial penalties had quit rates of 30.7%, compared to 15.2% for controls receiving standard cessation support.
The StickK platform aggregated data showing that financial stakes increase follow-through rates by 2-3x compared to pledge-only conditions. Higher stakes produced higher completion rates. The cost structure works because people genuinely respond to escalating consequences.
Thomas Schelling's work on strategic self-control identified how future selves develop different preferences than present selves. A commitment device closes that gap by making your present self's values binding on your future self. When you put money at stake or make a public promise, your past self guards against your future self's temptations.
How It Works
Pick your target behavior
Define exactly what success looks like: "no cigarettes for 90 days" not "quit smoking."
Choose your commitment mechanism
Financial stakes (your money or donations to a charity you dislike), social stakes (public declaration with consequences), or identity stakes (reputation).
Set the penalty size
Make it meaningful but proportional to your income. Too small won't deter you. Too large becomes demoralizing.
Use objective metrics
Breath tests for smoking, weigh-ins for weight loss. Not subjective self-assessment.
Create external referee
Don't judge yourself. Use an app, third party, or accountability partner who enforces impartially.
Activate today
The commitment works only when it's live, not when you've thought about it.
Real-World Examples
A software engineer sets up Beeminder to charge $5 for every day she codes less than 4 hours.
Missing two weeks costs $70. The financial sting keeps her focused during work hours.
A person quitting alcohol uses StickK to commit $100 to a political organization he dislikes for every day he drinks in a 180-day window. The political penalty adds psychological force beyond money.
A team commits to exercising three times weekly.
They post proof daily in a Slack channel. Missing a day means public failure and a $50 donation. Financial plus social stakes create dual pressure.
Strengths
Limitations
How to Get Started Today
Choose one specific behavior that you've repeatedly failed to execute despite genuine intention to change (not something you're ambivalent about).
Set a 30-day commitment device using either StickK (which handles enforcement) or a simple accountability partner agreement with financial stakes ($20-50 per failure depending on your income level).
Make the metric objective and measurable: specific exercise sessions logged, specific foods avoided, or specific habits completed.
Activate it today, not next week.
Frequently Asked Questions
What is Commitment Devices?
Commitment Devices is a habit-building and habit-breaking method based on the principle: "Use financial or social stakes to pre-commit to behavior and reduce reliance on willpower." Originated by Jon Elster (Ulysses and the Sirens, it helps people Overriding strong temptations and cravings and One-time behavioral changes with clear success criteria.
Is Commitment Devices backed by science?
Yes. Commitment Devices has strong scientific evidence supporting its effectiveness (4/5 on our evidence scale). It is most effective for Overriding strong temptations and cravings and One-time behavioral changes with clear success criteria.
Who should use Commitment Devices?
Commitment Devices works best for people focused on Overriding strong temptations and cravings, One-time behavioral changes with clear success criteria, Behaviors where you anticipate willpower failure. It's rated 3/5 for difficulty, making it suitable for intermediate practitioners.
When should I avoid using Commitment Devices?
Commitment Devices may not be the best choice for Behaviors requiring ongoing flexibility and adaptation or Complex habits that need to evolve over time. In those cases, consider alternative methods like Public Commitment or Social Accountability.
Pairs Well With
Implementation Intentions (If-Then Planning)
Pre-decide exactly when, where, and how you'll act
Public Commitment
Declare your behavioral goal to others, leveraging consistency motivation and reputation concerns
Social Accountability
Enlist regular check-ins with a partner or group to monitor progress and create behavioral oversight