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, most reliable way to judge a mutual fund's quality over time is by analyzing its performance, diversification, and fees. The Zacks Mutual Fund Rank, which covers over 19,000 mutual funds, has helped us identify three outstanding options that are perfect for any long-term investors' portfolios that is retirement-focused.

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

MFS Blended Research Value Equity C (BRUGX Quick QuoteBRUGX - Free Report) : 1.46% expense ratio and 0.25% management fee. BRUGX 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. BRUGX has achieved five-year annual returns of an astounding 12.8%.

Goldman Sachs Tax Managed Equity A (GCTAX): 1.02% expense ratio and 0.64% management fee. GCTAX 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 yearly returns of 13.31% over the last five years, GCTAX is an effectively diversified fund with a long reputation of solidly positive performance.

Franklin Global Equity I (SMYIX): 0.95% expense ratio and 0.75% management fee. SMYIX 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 a five-year annual return of 15.46%, 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.