What percent is usually paid when buying on margin?

When buying on margin, investors are typically required to pay a minimum of 50% of the purchase price of the securities with their own funds, as mandated by the Federal Reserve's Regulation T. This means that the remaining 50% can be borrowed from a brokerage firm. However, specific margin requirements can vary depending on the brokerage and the type of securities being purchased. Always check with your brokerage for their specific margin requirements.