What is the minimum investment requirement for a custom Smartfolio? The minimum amount you can invest or hold within a Smartfolio is $500.00. Related articles How do I invest in a Smartfolio? How many stocks do I have to choose from when building my custom Smartfolio? Are there subscription fees for using iFlip? Can I view past performance and backtesting data when building my own Smartfolio? How does the A.I. work with a custom SmartFolio?