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.

If you are looking to diversify your portfolio, consider Goldman Sachs Small Cap Equity Insights Service Class (GCSSX). GCSSX is a Small Cap Blend mutual fund, allowing investors a way to diversify their funds among various types of small-cap stocks. This fund is a winner, boasting an expense ratio of 1.34%, management fee of 0.8%, and a five-year annualized return track record of 10.12%.

BlackRock Advantage Large Cap Growth I (CMVIX Quick QuoteCMVIX - Free Report) : 0.62% expense ratio and 0.56% management fee. CMVIX is a Large Cap Growth mutual fund, and these funds invest in many large U.S. firms that are projected to grow at a faster rate than their large-cap peers. With yearly returns of 12.38% over the last five years, CMVIX is an effectively diversified fund with a long reputation of solidly positive performance.

Fidelity Value Fund (FDVLX) is an attractive large-cap allocation. FDVLX is a Mid Cap Value mutual funds that aims to target medium-sized companies that possess strong value and income opportunities for investors. FDVLX has an expense ratio of 0.69%, management fee of 0.67%, and annual returns of 11.96% 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.