The financial performance of the banking sector globally can be seen on the capital markets of each country. One of the important sources of information in the investment business on the capital market is the financial reports that are provided by every company going public. The objectives of this study are (1) to determine the simultaneous and partial effect of liquidity factors, Debt Equity Ratio, company size on timeliness of financial reporting in the banking sector in Indonesia. (2) to determine what factors are dominant in the timeliness of financial reporting in the banking sector in Indonesia. This research uses secondary data with panel data analysis method. The results show the liquidity variable, Debt Equity Ratio and firm size positively influence on timeliness of financial reporting in the banking sector in Indonesia. Firm Size is the dominant factor that has a significant positive effect on the Timelines Financial Report of the banking sector in Indonesia. The findings of this research are that increasing liquidity, Debt Equity Ratio and Firm Size can increase the Timelines Financial Report of the banking sector in Indonesia. Firm Size as the dominant factor is the attraction and driving force for the Timelines Financial Report banking sector in Indonesia. The research can be used as a reference for future researchers on identifying efforts of the influence of Liquidity, Debt to Equity Ratio, Firm Size and Timelines Report.