Investing in mutual funds for retirement is never too late. And the Zacks Mutual Fund Rank can be an excellent tool for investors looking to invest in the best funds.

The best way to shortlist great mutual funds is to ensure solid performance, diversification, and low fees. Some are better than others, but utilizing the Zacks Mutual Fund Rank, we have identified three mutual funds that could be solid additions to one's retirement portfolio.

Let's take a look at some of our top-ranked mutual funds with the lowest fees.

Amana Growth Investor (AMAGX Quick QuoteAMAGX - Free Report) : 0.91% expense ratio and 0.64% management fee. AMAGX is a Large Cap Growth mutual fund, and these funds invest in many large U.S. firms that are projected to grow at a faster rate than their large-cap peers. AMAGX has achieved five-year annual returns of an astounding 15.69%.

Matthews Asia Small Companies Institutional (MISMX Quick QuoteMISMX - Free Report) . Expense ratio: 1.15%. Management fee: 1%. MISMX is a Pacific Rim - Equity mutual fund; these funds typically invest in companies throughout the dominant export-focused markets of Hong Kong, Singapore, Taiwan, and Korea. This fund has managed to produce a robust 14.3% over the last five years.

Deutsche Science and Technology Institutional (KTCIX Quick QuoteKTCIX - Free Report) : 0.69% expense ratio and 0.45% management fee. KTCIX is a Sector - Tech mutual fund, allowing investors to own a stake in a notoriously volatile sector with a much more diversified approach. The fund is mainly invested in equities, has a long reputation of salutary performance, and has yearly returns of 17.55% over the last five years.

We hope that your investment advisor (if you use one) has you invested in one or all of the top-ranked mutual funds we've reviewed. But if that isn't the case, it might be time to have a conversation or reconsider this vitally important relationship.