It is never too late to invest in mutual funds for retirement. As such, if you plan to invest in some of the best funds, the Zacks Mutual Fund Rank can provide you with valuable guidance.

How can you tell a good mutual fund from a bad one? It's pretty basic: if the fund is diversified, has low fees, and shows strong performance, it's a keeper. Of course, there's a wide range, but using the Zacks Mutual Fund Rank, we've found three mutual funds that would be great additions to any long-term investors' portfolios.

Let's learn about some of Zacks' highest ranked mutual funds with low fees you may want to consider.

Janus Henderson Global Technology Institutional (JGLTX): 0.72% expense ratio and 0.64% management fee. JGLTX is a Sector - Tech mutual fund, allowing investors to own a stake in a notoriously volatile sector with a much more diversified approach. JGLTX has achieved five-year annual returns of an astounding 17.26%.

American Funds New Economy R6 (RNGGX): 0.4% expense ratio and 0.36% management fee. RNGGX is a Global - Equity mutual fund, which invests their assets in large markets, leveraging the global economy. RNGGX, with annual returns of 12.87% over the last five years, is a well-diversified fund with a long track record of success.

Guardian Capital Dividend Growth I (DIVGX Quick QuoteDIVGX - Free Report) : 0.95% expense ratio and 0.75% management fee. DIVGX is part of the Large Cap Blend section, and these mutual funds most often invest in firms with a market capitalization of $10 billion or more. By investing in bigger companies, these funds offer more stability, and are often well-suited for investors with a "buy and hold" mindset. The fund is mainly invested in equities, has a long reputation of salutary performance, and has yearly returns of 11.31% over the last five years.

There you have it. If your financial advisor had you put your money into any of our top-ranked funds, then they've got you covered. If not, you may need to talk.