Investing in mutual funds for retirement is never too late. And the Zacks Mutual Fund Rank can be an excellent tool for investors looking to invest in the best funds.

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 take a look at some of our top-ranked mutual funds with the lowest fees.

Principal Large Cap Growth I J (PLGJX Quick QuotePLGJX - Free Report) has a 0.8% expense ratio and 0.6% management fee. PLGJX 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 yearly returns of 12.34% over the last five years, this fund clearly wins.

Meeder Dynamic Growth Fund (FLDGX Quick QuoteFLDGX - Free Report) : 1.31% expense ratio and 0.72% management fee. FLDGX 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 9.22% over the last five years, FLDGX is an effectively diversified fund with a long reputation of solidly positive performance.

Goldman Sachs US Equity Dividend & Premier A (GSPAX Quick QuoteGSPAX - Free Report) : 1.02% expense ratio and 0.7% management fee. GSPAX is a Large Cap Value fund. These funds invest in stocks with a market cap of $10 billion of more, but whose share prices do not reflect their intrinsic value. With a five-year annual return of 10.13%, 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.