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.

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 break down some of the mutual funds with the top Zacks Mutual Fund Rank and the lowest fees.

If you are looking to diversify your portfolio, consider AB Large Cap Growth I (ALLIX Quick QuoteALLIX - Free Report) . ALLIX is a Large Cap Growth option; these mutual funds purchase stakes in numerous large U.S. companies that are expected to develop and grow at a faster rate than other large-cap stocks. This fund is a winner, boasting an expense ratio of 0.6%, management fee of 0.48%, and a five-year annualized return track record of 13.9%.

WCM International SmCap Growth Inst (WCMSX Quick QuoteWCMSX - Free Report) : 1.25% expense ratio and 1% management fee. WCMSX is a Non US - Equity option, focusing their investments acoss emerging and developed markets, and can often extend across cap levels too. WCMSX, with annual returns of 9.18% over the last five years, is a well-diversified fund with a long track record of success.

TIAA-CREF Socl Choice Equity Institutional (TISCX Quick QuoteTISCX - Free Report) . Expense ratio: 0.18%. Management fee: 0.15%. Five year annual return: 11.17%. TISCX is classified as a Large Cap Blend fund. More often than not, Large Cap Blend mutual funds invest in companies with a market cap of over $10 billion. Buying stakes in bigger companies offer these funds more stability, and are well-suited for investors with a "buy and hold" mindset.

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.