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

TCW Relative Value Mid Cap I (TGVOX): 0.85% expense ratio and 0.7% management fee. TGVOX is a Mid Cap Value mutual funds that aims to target medium-sized companies that possess strong value and income opportunities for investors. With annual returns of 10.15% over the last five years, this fund is a winner.

Permanent Portfolio Permanent A (PRPDX). Expense ratio: 1.05%. Management fee: 0.79%. PRPDX is classified as an Allocation Balanced fund, which seeks to invest in a balance of asset types, like stocks, bonds, and cash, and including precious metals or commodities is not unusual. This fund has managed to produce a robust 12.36% over the last five years.

Columbia Contrarian Core Y (COFYX Quick QuoteCOFYX - Free Report) . Expense ratio: 0.61%. Management fee: 0.6%. Five year annual return: 11.4%. COFYX 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.

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.