How do I change the assumptions in Betterment’s retirement planning advice?

Learn about all of the assumptions that go into Betterment’s retirement planning methodology.

Many of the assumptions that we make can be modified by selecting your primary retirement envelope from the menu and then click on Forecaster in the Goal Progress section. Once you click "Edit additional assumptions" you'll be able to edit and review the following:

  • Social Security assumptions
  • Assumed lifespan
  • Inflation rate

If you navigate to "Settings" in your Retirement envelope and click "Edit Retirement Plan", you will be able to edit the following: 

  • Age you plan to retire
  • Target spending
  • Desired annual spending


For more accurate retirement planning advice, you can securely sync external accounts you're using for retirement.