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, 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.

Here are the funds that have achieved the Zacks Mutual Fund Rank #1 (Strong Buy) and have low fees.

Putnam Large Cap Value Y (PEIYX Quick QuotePEIYX - Free Report) : 0.64% expense ratio and 0.47% management fee. PEIYX 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. With annual returns of 10.39% over the last five years, this fund is a winner.

T. Rowe Price Capital Appreciation Fund (PRWCX Quick QuotePRWCX - Free Report) : 0.71% expense ratio and 0.58% management fee. PRWCX is categorized as an All Cap Value fund, and like the name suggests, invests across the cap spectrum in small-cap, mid-cap, and large-cap companies. PRWCX, with annual returns of 10.59% over the last five years, is a well-diversified fund with a long track record of success.

Oppenheimer Discovery I (ODIIX Quick QuoteODIIX - Free Report) : 0.65% expense ratio and 0.6% management fee. ODIIX is one of many Small Cap Growth mutual funds; these funds tend to create their portfolios around stocks with market capitalization of less than $2 billion. With a five-year annual return of 10.3%, 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.