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.

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

MFS Blended Research Core Equity R3 (MUETX): 0.63% expense ratio and 0.25% management fee. MUETX 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. With annual returns of 13.92% over the last five years, this fund is a winner.

Goldman Sachs International T/M Equity IR (GITRX Quick QuoteGITRX - Free Report) : 0.96% expense ratio and 0.85% management fee. GITRX 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. With yearly returns of 11.91% over the last five years, GITRX is an effectively diversified fund with a long reputation of solidly positive performance.

Nuveen LargeCap Value W (TRLWX): 0.41% expense ratio and 0.39% management fee. TRLWX is a Large Cap Value mutual fund, which invests in stocks with a market cap of $10 billion of more, but whose share prices do not reflect their intrinsic value. With a five-year annual return of 11.43%, this fund is a well-diversified fund with a long track record of success.

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.