Ever since the Bihar Government introduced the 125 Free Units Electricity Scheme, one question keeps coming up from electricity consumers across North Bihar: “If I use more than 125 units, how much bill will I actually have to pay?”
- What Is the NBPDCL Electricity Bill Calculator?
- How to Use the NBPDCL Electricity Bill Calculator
- Why This NBPDCL Bill Calculator Is Different
- Understanding the 125 Free Units Electricity Scheme
- NBPDCL Electricity Tariff Rates 2026–27 (BERC Approved)
- Electricity Duty and Other Applicable Charges
- Why This Calculator Gives Better Estimates
Whether you’re living in Muzaffarpur, Darbhanga, Begusarai, Samastipur, Madhubani, Saran, Purnia, East Champaran or West Champaran, calculating your electricity bill manually isn’t as straightforward as it looks. Besides your monthly electricity consumption, the final bill may also include fixed charges based on your sanctioned load, electricity duty and, for eligible domestic consumers, the benefit of Bihar Government’s free electricity subsidy.
That’s why I created this NBPDCL Electricity Bill Calculator. Instead of trying to understand lengthy tariff documents or manually subtracting subsidy benefits, you can simply enter your monthly electricity consumption and connected load. Within a few seconds, the calculator estimates your bill using the latest tariff approved by the Bihar Electricity Regulatory Commission (BERC).
Whether your connection is Domestic, Commercial, Industrial or you’re checking whether your household qualifies for the 125 free units benefit, this calculator helps you understand your expected electricity bill before the official NBPDCL bill is generated.
What Is the NBPDCL Electricity Bill Calculator?
The NBPDCL Electricity Bill Calculator is a free online tool designed specifically for consumers served by North Bihar Power Distribution Company Limited (NBPDCL). It estimates your monthly electricity bill using the latest tariff notified by the Bihar Electricity Regulatory Commission (BERC).
Unlike simple unit calculators that multiply your total consumption by one rate, this calculator follows the actual billing structure used by NBPDCL. It automatically considers your connection category, sanctioned load, applicable fixed charges, electricity duty and, for eligible domestic consumers, the Mukhyamantri 125 Free Units Electricity Scheme.
This makes the calculator useful for homeowners, tenants, shop owners, small businesses and industrial consumers who want a reliable estimate of their monthly electricity expenses.
If you’d like to verify the latest tariff order or consumer regulations, you can visit the Bihar Electricity Regulatory Commission (BERC) Official Website. For online bill payment, new electricity connections, complaint registration and other consumer services, visit the North Bihar Power Distribution Company Limited (NBPDCL) Official Website.
How to Use the NBPDCL Electricity Bill Calculator
You can estimate your electricity bill in less than a minute by following these simple steps.
Select your connection category such as Domestic Urban (DS-II), Domestic Rural (DS-I), Commercial (NDS-II), LT Industrial or EV Charging.
Enter the number of electricity units consumed during the current billing month.
Enter your sanctioned connected load in kilowatts (kW).
If you’re eligible for the Bihar Government’s 125 Free Units Scheme, keep the subsidy option enabled for an accurate calculation.
Click Calculate Bill to instantly view your estimated energy charges, subsidy benefit, fixed charges, electricity duty and total payable amount.
Why This NBPDCL Bill Calculator Is Different
Most electricity bill calculators available online simply multiply your monthly units by one tariff rate. That approach doesn’t work well for NBPDCL consumers, especially after the introduction of Bihar’s 125 Free Units Electricity Scheme.
This calculator has been designed to follow the actual billing process much more closely, making the estimate far more useful for everyday consumers.
125 Free Units Calculation
Eligible domestic consumers automatically receive the benefit of the Bihar Government’s first 125 free units without doing any manual calculations.
BERC Approved Tariff
Calculations are based on the latest FY 2026–27 tariff approved by the Bihar Electricity Regulatory Commission.
Domestic & Commercial Support
The calculator supports Domestic Urban, Domestic Rural, Commercial, Industrial and EV charging categories.
Connected Load Charges
Fixed monthly charges based on your sanctioned load are included automatically for a more realistic estimate.
Clear Bill Breakdown
Every important billing component, including subsidy, energy charges, fixed charges and electricity duty, is displayed separately.
Free and Easy to Use
No registration, login or mobile number is required. Simply enter your details and calculate your bill instantly.
Understanding the 125 Free Units Electricity Scheme
This is the feature that makes the biggest difference for many households in North Bihar.
Suppose a family in Darbhanga consumes 110 units during a billing month. If they are eligible under the Bihar Government’s subsidy scheme, the entire energy consumption falls within the first 125 free units. In such cases, no energy charge is payable, although other applicable charges may still appear depending on the connection.
Now consider another household in Muzaffarpur that consumes 180 units. The first 125 units remain covered under the government subsidy, while only the remaining units are billed according to the applicable tariff. This is where many consumers get confused, and why using a dedicated NBPDCL bill calculator provides a much more accurate estimate than manual calculations.
The calculator automatically applies this subsidy wherever applicable, so you don’t have to work out the free units yourself.
NBPDCL Electricity Tariff Rates 2026–27 (BERC Approved)
Knowing the latest tariff is the first step toward understanding your electricity bill. Under NBPDCL, the amount you pay depends on your connection category, monthly electricity consumption, sanctioned load and whether you’re eligible for the Bihar Government’s 125 Free Units Electricity Scheme.
The following tariff details are based on the latest FY 2026–27 tariff approved by the Bihar Electricity Regulatory Commission (BERC).
Domestic Electricity Tariff (DS-I Rural & DS-II Urban)
Residential consumers in North Bihar receive one of the biggest benefits available today—the Bihar Government’s 125 Free Units subsidy. If your household is eligible, the first 125 units consumed every month are covered under the scheme.
| Connection Category | Energy Charge | Government Subsidy | Fixed Charge |
|---|---|---|---|
| Domestic Urban (DS-II) | ₹7.42 per unit | First 125 Units Free | ₹80 per kW/month |
| Domestic Rural (DS-I) | ₹7.42 per unit | First 125 Units Free | ₹40 per kW/month |
How the 125 Free Units Scheme Works
| Monthly Consumption | Energy Charge |
|---|---|
| 0–125 Units | ₹0 (Fully Covered Under Government Subsidy) |
| Above 125 Units | ₹7.42 per unit on units exceeding 125 |
For example, if your household consumes 150 units, you don’t pay for all 150 units. The first 125 units are covered under the subsidy, while only the remaining 25 units are billed at the applicable tariff. The calculator performs this calculation automatically, helping you avoid mistakes.
Commercial (NDS-II) Tariff
This category applies to shops, offices, coaching centres, restaurants, clinics and other commercial establishments.
| Component | Applicable Rate |
|---|---|
| Energy Charge | ₹7.73 per unit |
| Fixed Demand Charge | ₹300 per kW/month |
| Electricity Duty | 6% |
The 125 Free Units subsidy is available only for eligible domestic consumers. Commercial connections are billed according to the applicable tariff without this government benefit.
Industrial (LTIS-I) Tariff
Small industrial units connected under LTIS-I are billed using the tariff approved by BERC.
| Component | Applicable Rate |
|---|---|
| Energy Charge | ₹7.79 per unit |
| Fixed Demand Charge | ₹278 per kW/month |
Factories, rice mills, workshops and small manufacturing units should always include fixed demand charges while estimating their electricity expenses, as these charges are based on the sanctioned connected load.
Electricity Duty and Other Applicable Charges
Along with energy charges and fixed charges, NBPDCL bills also include statutory charges wherever applicable.
| Billing Component | Applicable Rate |
|---|---|
| Electricity Duty | 6% |
Our calculator automatically includes electricity duty in the final estimate wherever applicable, giving you a bill that’s much closer to the one generated by NBPDCL.
Why This Calculator Gives Better Estimates
The biggest advantage of this calculator is that it doesn’t simply multiply your total units by ₹7.42. It first checks whether you’re eligible for the Bihar Government’s 125 Free Units Scheme, deducts the subsidized units automatically, applies the correct tariff only on the remaining units, adds fixed charges based on your sanctioned load and finally includes electricity duty wherever applicable.
This gives you a much more accurate estimate than generic online calculators, especially if your monthly consumption is close to the 125-unit limit.
For the latest tariff orders, subsidy updates, online bill payment, new electricity connections and consumer services, always refer to the North Bihar Power Distribution Company Limited (NBPDCL) Official Website and the Bihar Electricity Regulatory Commission (BERC).
