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 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.

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

Invesco SteelPath MLPSelect 40 R6 (OSPSX) has a 0.76% expense ratio and 0.69% management fee. OSPSX is classified as a Sector - Energy mutual fund. Throughout the massive global energy sector, these funds hold a wide range of quickly changing and vitally important industries. With yearly returns of 25.65% over the last five years, this fund clearly wins.

American Funds Global Growth 529E (CGGEX Quick QuoteCGGEX - Free Report) : 0.63% expense ratio and 0% management fee. CGGEX 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. CGGEX, with annual returns of 8.84% over the last five years, is a well-diversified fund with a long track record of success.

AB International Strat Eqs Z (STEZX) is an attractive large-cap allocation. STEZX is a Non US - Equity fund. Many of these funds like to allocate across emerging and developed markets, and will often focus on all cap levels. STEZX has an expense ratio of 0.71%, management fee of 0.66%, and annual returns of 11.01% over the past 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.