How does ASD (Additional Security Deposit) is calculated in TNEB | ASD Notice in TNEB Bill Meaning

The Tamil Nadu Electricity Supply Code mandates a review of the Additional Security Deposit (ASD) every two years under Regulation 5(5)(i). Below is a detailed breakdown of how ASD is calculated, what actions you need to take, and how to resolve discrepancies in your ASD notice.

1. How is Additional Security Deposit (ASD) Calculated?

The ASD amount is determined based on the monthly average electricity charges over the last 12 months, depending on your billing cycle:

For Bi-Monthly Billing Consumers

• ASD = 3 times the monthly average electricity charges over the past 12 months.
• Example: If your average bill is ₹500, your ASD will be ₹1,500.

For Monthly Billing Consumers

• ASD = 2 times the monthly average electricity charges over the past 12 months.
• Example: If your average bill is ₹500, your ASD will be ₹1,000.

2. What to Do If Your ASD Notice Shows a Higher Amount?

If you receive an ASD notice where the deposit amount is higher than required, you can request an adjustment in your next bill by visiting your respective TNEB office.

3. What Happens If Your Current Deposit is Less Than the New ASD Amount?

If your existing Security Deposit (SD) is lower than the newly calculated ASD, you must:

• Pay the additional amount in the next billing cycle or by the due date mentioned in the notice.
• Failure to pay within the due date may result in service disconnection.

4. When is the Security Deposit Reviewed?

• The adequacy of Security Deposit (SD) is reviewed every two years for LT consumers.
• Interest earned on the existing deposit will be adjusted.
• If the available deposit is less than the required ASD, the balance will be collected as Additional Security Deposit (ASD).