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 easiest way to judge a mutual fund's quality over time is by analyzing its performance, diversification, and fees. Using the Zacks Mutual Fund Rank of over 19,000 mutual funds, we've identified three outstanding mutual funds that are ideally suited to help long-term investors pursue and achieve their retirement investing goals.

Here are the funds that have achieved the Zacks Mutual Fund Rank #1 (Strong Buy) and have low fees.

Boston Partners Global Equity Institutional (BPGIX): 0.95% expense ratio and 0.9% management fee. BPGIX is a Global - Equity mutual fund investing in bigger markets like the U.S., Europe, and Japan; these kinds of funds aren't limited by geography. BPGIX has achieved five-year annual returns of an astounding 18.07%.

Cavanal Hill World Energy Fd Inv Cl (APWEX Quick QuoteAPWEX - Free Report) : 1.15% expense ratio and 0.6% management fee. APWEX is a Sector - Energy mutual fund, which encompasses a wide range of vastly changing and vitally important industries throughout this massive global sector. APWEX, with annual returns of 28.87% over the last five years, is a well-diversified fund with a long track record of success.

FMI Common Stock Institutional (FMIUX): 0.83% expense ratio and 0.79% management fee. FMIUX is a Mid Cap Blend mutual fund, and usually features a portfolio with stocks of various styles and sizes, allowing for diversification within a strategy that focuses on mid cap companies. The fund is mainly invested in equities, has a long reputation of salutary performance, and has yearly returns of 16.23% 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.