Yes, you can lend money to your business and charge interest. When you do this, it's typically considered a loan to the business. To maintain proper documentation and transparency, it's essential to create a formal loan agreement that outlines the terms of the loan, including the loan amount, interest rate, repayment schedule, and any collateral or guarantees if applicable. Charging interest is common for tax purposes and to compensate you for the opportunity cost of your money. However, make sure that the interest rate is reasonable and in line with market rates to avoid any legal or tax issues. Consult with a legal or financial advisor to ensure that your loan agreement complies with relevant regulations and that it is structured correctly.