When choosing an online mutual fund investment portal, look for features like easy account setup, secure KYC processing, wide fund selection, performance tracking, and SIP management. It should also offer portfolio analysis, risk profiling tools, and timely alerts for NAV changes or maturity dates. A good portal provides responsive customer support and access to historical fund data and market insights. A mobile-friendly interface and integration with digital payment methods are also important. These features ensure a seamless investment experience on an online mutual fund investment portal.