Septic tanks typically need to be emptied every 3 to 5 years, but the exact frequency depends on several factors, such as the size of your tank, the number of people in your household, and your water usage habits. Larger households or those with higher water consumption may need to empty their tanks more frequently to avoid issues like blockages and system failures. Regular professional inspections can help determine the best schedule for your specific situation. It’s essential to adhere to a regular emptying schedule to prevent potential damage to your septic system, which could result in costly repairs or environmental hazards.