The Retirement Plan Cooked up by Two Behavioral Scientists

How you can implement a similar approach to your retirement savings

Ben Le Fort
4 min readMar 1, 2024

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Photo by National Cancer Institute on Unsplash

The 401k perfectly encapsulates the brilliance and flaws of traditional economic models.

  • Contributions are tax-deductible
  • Investment gains grow on a tax-deferred basis
  • Employers typically match a certain percentage of contributions

If used correctly, it’s an incredibly powerful tool to help middle-income workers save for retirement.

There’s only one problem.

It was designed for a “perfectly rational” economic actor. As we know, humans are far from rational, and none of us approach a description of perfectly rational.

But what would happen if you had a workplace retirement savings plan designed by two experts in behavioral science?

People would save a lot more money.

Building a savings plan around your biases

In a 2001 paper, Richard Thaler and Shlomo Benartzi discuss the retirement savings plan they created called “The Save More Tomorrow (SMT) plan.” The plan works within the rules of real-life workplace retirement plans like 401ks — but with a few tweaks…

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Ben Le Fort

I write about behavioral finance & evidence based investing. Want to work with me? e: info@benlefort.com Here's my Substack: https://benlefort.substack.com/