Investing in index funds is one of the most reliable ways to build wealth over the long term. But where you choose to invest matters as much as what you invest in. The right online broker can help you maximize your returns through low fees, strong fund access and tools that support passive investing strategies.

Long-term investors have more options than ever before. But not all brokers are created equal, especially if you’re focused on minimizing costs, accessing popular fund families like Vanguard , Fidelity or Schwab and taking advantage of features like dividend reinvestment and automatic investing.

Quick Look at the Best Online Brokers for Index Funds:

Best overall: Fidelity Investments

Best customer service: Charles Schwab

Best for direct access to low-cost fund

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