There is never a wrong time to invest in mutual funds for retirement. So, if you're still looking for the best mutual funds, the Zacks Mutual Fund Rank can be a great guide.

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.

Bridgeway Small Cap Value N (BRSVX Quick QuoteBRSVX - Free Report) has a 0.85% expense ratio and 0.61% management fee. BRSVX is a Small Cap Value mutual fund option, which typically invest in companies with market caps under $2 billion. With yearly returns of 8.64% over the last five years, this fund clearly wins.

Columbia Dividend Income Fund R4 (CVIRX Quick QuoteCVIRX - Free Report) . Expense ratio: 0.65%. Management fee: 0.53%. CVIRX 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. This fund has managed to produce a robust 9.55% over the last five years.

MFS Mass Investors Growth Stock B (MIGBX Quick QuoteMIGBX - Free Report) : 1.46% expense ratio and 0.33% management fee. MIGBX 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. With a five-year annual return of 12.22%, 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.