How to read your Tata Power-DDL electricity bill
This guide shows where to find your CA number and how the bill summary adds up. It tells you what PPAC, the surcharges and the Delhi subsidy are. All meanings come from Tata Power-DDL documents.
- Redrawn from TPDDL’s sample bill
- 14 fields explained
- Field meanings from the FY26 handbook
Independent guide. ebbillcalc is not part of Tata Power Delhi Distribution Ltd (Tata Power-DDL). TPDDL did not approve this guide. The bill below is our own drawing. All names, numbers and amounts are invented. The layout follows the official TPDDL sample (Tata Power-DDL “Know your bill” sample, 2015, explained again in the FY26 customer handbook). The 2015 sample does not show the pension trust surcharge. TPDDL added it later. Each explanation links to the TPDDL document that it comes from.
Quick answers
Where is my CA number?
It is at the top right of the bill, in large print. On the TPDDL sample, it starts with 6000. See #1 on the sample
How much do I pay, and when?
The box next to the bill summary shows the amount and the due date. See #5 on the sample
How many units did I use?
See the consumption column in the meter table. Units = (current reading − previous reading) × MF. See #6 on the sample
Where is the Delhi subsidy?
It is in the bill summary, as Subsidy. It is a minus amount. TPDDL subtracts it from the current demand. See #4 on the sample
What is PPAC?
It is a power purchase cost adjustment. DERC sets it each quarter. It is a percentage of the fixed and energy charges. See #10 on the sample
What is MDI?
It is your highest average load in any 30 minutes of the month. If it is more than your sanctioned load, TPDDL adds 30% to the fixed charge. See #2 on the sample
Watch: how to read a TPDDL bill
A short video (61 seconds). It has no sound. The captions explain each field.
Your bill at a glance
How the bill adds up
From meter reading to payment
- Meter readingTPDDL reads the meter (MDI and kWh).
- Bill dateTPDDL makes the bill.
- 3 days before the due datePay online by this day. Then you do not pay LPSC.
- Due datePay the amount payable.
- After the due dateLPSC starts on the amount that you did not pay.
- 15 days’ noticeIf you do not pay, TPDDL can disconnect the supply after the notice.
How the CA No. is made
6000Start on the TPDDL sampleXXXXXXX7 more digitsThis is the format on the TPDDL sample bill. TPDDL does not give a rule for the number of digits.
The TPDDL bill, field by field
Move the bill to the left to see all of it.
- 1
CA No. (contract account number)
This is your account number with Tata Power-DDL. It is at the top right of the bill. On the TPDDL sample, it starts with 6000 and has 7 more digits. Write it on the back of a cheque. Give it when you call TPDDL.
Source: Tata Power-DDL: Know your bill, sample bill (PDF)
CA NO. : 6000xxxxxxx
- 2
MDI reading (maximum demand)
MDI is the maximum demand. It is the highest average load in your premises in any 30 minutes of the month, in kW or kVA. If MDI is more than your sanctioned load, TPDDL adds 30% to the fixed charge.
Source: Tata Power-DDL Customer Handbook FY26 (PDF)
Maximum Demand (MDI) refers to the highest average power load recorded at your premises during any continuous 30-minute period within the billing month
- 3
Bill basis
TPDDL documents do not explain this field. BSES uses the same DERC rules. BSES says that “actual” means that the bill uses the meter reading, not an estimate.
Source: BSES Rajdhani FAQs
If the Bill Basis field shows 'actual', this means the bill is generated on the basis of downloaded reading and not on provisional basis.
- 4
Bill summary
Net amount payable = arrears or refund + adjustments + current demand + subsidy (a minus amount) + LPSC. “Other terms” below explains each part.
Source: Tata Power-DDL: bill calculation (PDF)
Total of Arrears / Refund / Adjustment / Current Demand / Subsidy & LPSC
- 5
Due date and amount payable
Pay on or before the due date. TPDDL tells you to pay online 3 days before the due date. Then you do not pay a late payment surcharge. If you do not pay, TPDDL can disconnect the supply after 15 days’ notice.
- 6
Meter readings and consumption
Units = (current reading − previous reading) × MF (multiplying factor). The second row shows the kW reading (MDI).
Source: Tata Power-DDL Customer Handbook FY26 (PDF)
It is derived on the basis of difference of current & previous meter reading & further multiplied by the applicable multiplying factor
- 7
Energy charges detail
This table divides your units into the DERC blocks. Each block has its rate. Energy charge = units × rate.
Source: Tata Power-DDL Customer Handbook FY26 (PDF)
Energy Charge = Units Consumed x Applicable Tariff Rate
- 8
Slab (bill period)
This is a factor for the number of days. It changes the fixed charge and the block sizes when the bill period is not one month. It also applies when the tariff or category changes in the bill period.
Source: Tata Power-DDL Customer Handbook FY26 (PDF)
Bill period (Slab) is calculated for the purpose of fixed charge calculation and bifurcation of units in case of block / tariff / category change.
- 9
Fixed charges
Fixed charges = sanctioned load × rate for each kW × slab. The TPDDL example: 2 kW × ₹20 × 1.1 = ₹44.
Source: Tata Power-DDL Customer Handbook FY26 (PDF)
Fixed Charges =Sanction load x Rate x Slab
- 10
PPAC (power purchase adjustment charge)
PPAC is the power purchase adjustment charge. It is the change in the cost of the power that TPDDL buys, against the cost in the tariff. DERC sets it each quarter. It is a percentage of the fixed and energy charges.
Source: Tata Power-DDL Customer Handbook FY26 (PDF)
the variation in power purchase price as compared to base price considered in last tariff schedule, is decided by DERC, on quarterly basis
- 11
Surcharge
This is a DERC surcharge on the fixed and energy charges. It recovers an old revenue gap of the Delhi discoms, up to FY 2010-11.
- 12
Pension trust surcharge
This charge pays the pensions of former Delhi Vidyut Board employees. It is a percentage of the energy and fixed charges. It started on 1 September 2017.
Source: Tata Power-DDL Customer Handbook FY26 (PDF)
towards recovery of Pension Trust charges (PTC) of erstwhile DVB Employees / Pensioners
- 13
Electricity tax
Electricity tax = 5% of (energy charge + PPAC on the energy charge + surcharge on the energy charge).
- 14
Total current demand
Total current demand = fixed charges + energy charges + PPAC + surcharge + pension trust surcharge + electricity tax. This is the bill for this month, before subsidy and arrears.
Source: Tata Power-DDL Customer Handbook FY26 (PDF)
Net Current Demand = Fixed Charges + Energy Charges + PPAC + Surcharge + Pension Trust Surcharge + E.Tax
Other terms you may see
These lines can also be on a TPDDL bill. The explanations come from TPDDL documents.
- Arrears / Refund
Arrears are old amounts that you did not pay. You must pay them immediately. A refund is an old provisional amount that TPDDL adjusts in this bill.
Source: Tata Power-DDL: bill calculation (PDF)
Arrears reflected are previous billed current demand +/- adjustment remained unpaid and payable immediately
- Adjustments
These are debits or credits after TPDDL revised a bill. An annexure gives the details.
- Subsidy
The Government of Delhi gives this subsidy to domestic residential customers, if its notification for the year applies.
Source: Tata Power-DDL: bill calculation (PDF)
Allowed as per notification released from Govt. of Delhi if applicable
- LPSC (late payment surcharge)
This is a surcharge on the amount that you did not pay. It starts on the due date and stops on the day that you pay.
Source: Tata Power-DDL: bill calculation (PDF)
Late payment surcharge is levied on amount remained unpaid from relevant due date till the date of payment
Labels TPDDL does not explain
These labels are on the bill. We did not find an official explanation for them.
- MRU No.
- Walking sequence
- Contract demand
- TOD period
- Bill remark values
- Power factor
- Bill No.
We explain a line only if TPDDL or the regulator explains it. If you have a question about one of these lines, ask your section office or call the helpline on the bill.
Pay or see your bill online
These are official TPDDL channels only.
- Tata Power-DDL website and My Tata Power appCards, net banking, UPI, BBPS
- Bill on WhatsApp: +91 73034 82071Number from TPDDL’s FY26 handbook
- UPIScan the QR printed on your bill or e-bill
Pay only on official channels. ebbillcalc does not ask for your consumer number. ebbillcalc does not take payments. Some messages say that your power will be cut tonight. They tell you to call a number or install an app. Do not do this.
Is the amount right?
BRPL, BYPL and Tata Power-DDL all use the DERC tariff. Type your units and your total. The checker includes the Government of Delhi subsidy.
Questions
Where is the CA number on a Tata Power-DDL bill?
It is at the top right of the bill, in large print. On the TPDDL sample, it starts with 6000 and has 7 more digits.
What is PPAC on a TPDDL bill?
PPAC is the power purchase adjustment charge. It is the change in the cost of the power that TPDDL buys, against the cost in the tariff. DERC sets it each quarter. It is a percentage of the fixed and energy charges.
Why are there two surcharges?
The surcharge recovers an old revenue gap of the Delhi discoms. The pension trust surcharge pays the pensions of former Delhi Vidyut Board employees. Each is a percentage of the fixed and energy charges.
What is MDI and why is it important?
MDI is your highest average load in any 30 minutes of the month. If MDI is more than your sanctioned load, TPDDL adds 30% to the fixed charge.
How does the Delhi subsidy show on my bill?
The bill summary shows it as Subsidy. It is a minus amount. TPDDL subtracts it from the current demand if the Government of Delhi notification applies to you.
Sources
- Tata Power-DDL: Know your bill, sample bill (PDF)
- Tata Power-DDL Customer Handbook FY26 (PDF)
- Tata Power-DDL: bill calculation (PDF)
- BSES Rajdhani FAQs
We read the official documents on 15 October 2026. Bill layouts can change. If your bill looks different, tell us. Cover your name, address and consumer number first.