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 learn about some of Zacks' highest ranked mutual funds with low fees you may want to consider.

If you are looking to diversify your portfolio, consider

JPMorgan US Equity Fund L

(JMUEX Quick QuoteJMUEX - Free Report) . JMUEX 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. This fund is a winner, boasting an expense ratio of 0.54%, management fee of 0.4%, and a five-year annualized return track record of 17.68%.

T. Rowe Price Institutional Large Cap Core

(TPLGX Quick QuoteTPLGX - Free Report) : 0.57% expense ratio and 0.55% management fee. TPLGX is a part of the Large Cap Growth mutual fund category, which invest in many large U.S. companies that are expected to grow much faster compared to other large-cap stocks. TPLGX, with annual returns of 14.54% over the last five years, is a well-diversified fund with a long track record of success.

VALIC Company I Mid Cap Strategic Growth

(VMSGX Quick QuoteVMSGX - Free Report) : 0.74% expense ratio and 0.66% management fee. VMSGX is a Global - Equity mutual fund. These funds invest in large markets like the U.S., Europe, and Japan, and operate with very few geographical limitations. The fund is mainly invested in equities, has a long reputation of salutary performance, and has yearly returns of 12.45% 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.