A broker's premium tax of 4% must be remitted to the department:

The correct choice regarding the timing for remitting a broker's premium tax of 4% is quarterly. This requirement ensures that the tax is collected and processed in a timely manner, allowing the state to maintain its financial responsibilities and provide oversight over surplus lines insurance.

In the context of surplus lines in South Carolina, the quarterly remittance allows for regular intervals of reporting and payment, which aligns with standard practices for handling taxes related to insurance transactions. This method facilitates the management of funds and ensures that the state receives the necessary revenues efficiently, without overwhelming brokers with a single annual payment that could complicate financial planning.

The other options, such as a monthly, yearly, or within 30 days of the policy delivery, do not align with the established regulations for premium tax remittances. Monthly payments could lead to an unnecessary administrative burden, while yearly payments risk delays in revenue collection, and requiring payment within 30 days of policy delivery would not accommodate the timelines that brokers typically operate under in managing their accounts and financial records.