Research from Vanguard shows that working with the right financial advisor could add about 3% to net returns over time (4). That difference can become substantial. For example, if you started with a $50,000 retirement portfolio, professional guidance could mean more than $1.3 million in additional growth over 30 years, depending on market conditions and your investment strategy.Rather than basing your retirement on general guidance, it could be worth working with a qualified financial professional before ma ...