When your Visitor Visa expires, you are not allowed to apply for a new Visitor Visa without departing from Indonesia still, you are advised to apply at Immigration Office for a residence permit extension.
Please visit www.imigrasi.go.id to get more detailed information regarding the request for a residence permit and other types of visa (work visa, student visa, etc.).
If you overstay your visa, you might be asked to pay fines of IDR 1,000,000 per day, detained, deported, and/or banned future travel to Indonesia for a specific period.
If you overstay your visa for more than 60 days, you might be detained, deported, and/or banned from future traveling to Indonesia for a specific period.