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

Vaughan Nelson Emerging Mkts Instl (ADVMX Quick QuoteADVMX - Free Report) has a 1.01% expense ratio and 0.85% management fee. ADVMX is a Non US - Equity option, focusing their investments acoss emerging and developed markets, and can often extend across cap levels too. With yearly returns of 9.94% over the last five years, this fund clearly wins.

Goldman Sachs Large Cap Growth Insights I (GCGIX). Expense ratio: 0.55%. Management fee: 0.5%. GCGIX 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. This fund has managed to produce a robust 13.9% over the last five years.

American Funds Investor Company of America 529A (CICAX) is an attractive large-cap allocation. CICAX 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. CICAX has an expense ratio of 0.59%, management fee of 0.23%, and annual returns of 14.88% 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.