<prompt> Human: I currently have an old 401K with a previous employer. Lets make the math easy and call it 50K. Im looking at Betterment and when all is said and done Id save about .355 on expenses. What are the implications of this savings over 30 years if i dont add a dime. I dont really know how to visualize this... if it helps lets assume a constant rate of return?Im looking to understand how this will effect the trend line... Are we talking hundreds? Thousands?  <response>: You can see the effects of saving 13rd of a percent on expenses on this Vanguard pageIm looking to understand how this will effect the trend line... Are we talking hundreds? Thousands?Thousands, although this depends a lot on your assumptions about returns. 