⚡ How to Calculate Bihar Electricity Bill (Quick Answer)
In Bihar 2026, domestic electricity (NBPDCL/SBPDCL) is free for the first 125 units per month. Units above 125 are billed at ₹5.52 per unit. Your total bill also includes a ₹0.15 FAC per unit, ₹80 fixed charge, ₹25 meter rent, and 5% electricity duty on energy charges.
Example: If you consume 200 units this month — Energy = 75 × ₹5.52 = ₹414 · Duty = ₹20.70 · FAC = ₹30 · Fixed + Meter = ₹105 · Total ≈ ₹570. Use the calculator below for instant, accurate results.
Bihar Electricity Bill Calculator
NBPDCL & SBPDCL · Latest 2026 Tariffs
⚙️ Fixed Charges & Duty
📊 Tariff Slabs
| Min Units | Max (0=∞) | Rate ₹/kWh |
|---|
Your Bill Breakdown
Detailed charge summary
Forecasted Bill Trend
Charge Composition
Savings vs Reduced Usage
Slab-wise Breakdown
Bihar Electricity Tariff Rates 2026 — NBPDCL & SBPDCL
Official BERC-approved tariff slabs for domestic and commercial connections in Bihar
🏠 Domestic (LT-1) Slab Rates — 2026
| Units Consumed (kWh/month) | Rate per Unit (₹/kWh) | Notes |
|---|---|---|
| 0 – 125 units | ₹0.00 (FREE) | Har Ghar Bijli subsidy |
| Above 125 units | ₹5.52 / unit | Applies to every unit above 125 |
🏢 Commercial (LT-2/LT-3) Slab Rates — 2026
| Units Consumed (kWh/month) | Rate per Unit (₹/kWh) |
|---|---|
| 0 – 100 units | ₹6.10 |
| 101 – 200 units | ₹7.25 |
| 201 – 500 units | ₹8.10 |
| Above 500 units | ₹9.00 |
📋 Additional Fixed Charges (Domestic & Commercial)
| Charge Type | Domestic | Commercial |
|---|---|---|
| Fixed Monthly Charge | ₹80 / month | ₹100 / month |
| Meter Rent | ₹25 / month | ₹40 / month |
| Fuel Adjustment Charge (FAC) | ₹0.15 / unit | ₹0.15 / unit |
| Electricity Duty (ED) | 5% of energy charges | 5% of energy charges |
Understanding Your Bihar Electricity Bill in 2026
Everything you need to know about bijli bill calculation in Bihar — explained simply
Most people in Bihar receive their electricity bill at the end of the month and just pay it — without really understanding what they're being charged for. If your bill seems higher than expected, or you simply want to plan your monthly budget better, knowing how your bijli bill is calculated makes a real difference.
Bihar's electricity distribution is handled by two state-owned companies: NBPDCL (North Bihar Power Distribution Company Ltd.) and SBPDCL (South Bihar Power Distribution Company Ltd.). Both are subsidiaries of the Bihar State Power Holding Company Ltd. (BSPHCL) and operate under tariffs approved by the Bihar Electricity Regulatory Commission (BERC).
The 125-Unit Free Slab — What Most People Miss
One of the most important features of Bihar's 2026 electricity tariff is the free slab for domestic consumers: the first 125 units consumed every month cost ₹0 in energy charges. This is part of Bihar's Har Ghar Bijli (electricity for every home) scheme designed to make power affordable for rural and low-income households.
What Happens When You Cross 125 Units?
Once your consumption crosses 125 units in a billing month, every additional unit is charged at ₹5.52 per kWh. This is where your bill can jump significantly. For example, consuming 150 units means paying for just 25 units at ₹5.52 — a charge of ₹138 — versus paying nothing for the same first 125 units.
At 200 units, you're paying for 75 units at ₹5.52 each — that's ₹414 in energy charges alone. Add fixed charges, FAC, meter rent, and electricity duty, and a 200-unit month costs approximately ₹565–₹580. Our Bihar electricity bill calculator above handles all these calculations instantly, so you don't need to do the math manually.
The Hidden Charges Nobody Talks About
Most people focus only on per-unit rates when thinking about their electricity bill. But in Bihar, your total bill includes several additional components that are often overlooked:
- FAC (Fuel Adjustment Charge): Currently ₹0.15 per unit. This covers fluctuations in the cost of fuel (coal, gas) used to generate electricity. For a 200-unit month, FAC alone adds ₹30 to your bill.
- Fixed Monthly Charge: ₹80 for domestic connections. This applies regardless of how many units you consume — even if you used zero units.
- Meter Rent: ₹25 per month. Covers the cost of maintaining the electricity meter installed at your premises.
- Electricity Duty (ED): 5% of your energy charges. This is a state government levy. For ₹414 in energy charges, ED adds ₹20.70.
NBPDCL vs SBPDCL — Which One Are You On?
Your distribution company depends entirely on where you live in Bihar. NBPDCL serves the northern districts — Darbhanga, Madhubani, Muzaffarpur, Sitamarhi, Samastipur, Vaishali, Sheohar, Motihari (East Champaran), Bettiah (West Champaran), and Gopalganj. SBPDCL serves southern districts — Patna, Gaya, Nalanda, Bhojpur, Rohtas, Aurangabad, Jehanabad, Arwal, Lakhisarai, Sheikhpura, and Munger.
Both companies currently follow identical tariff structures approved by BERC. The tariff rates, slab ranges, fixed charges, and FAC are the same for both NBPDCL and SBPDCL consumers. The choice between them in our calculator affects your bill reference only — not the calculation outcome.
Why Use Our Bihar Bijli Bill Calculator?
Trusted by over 1 lakh Bihar residents every month for accurate bill estimates
2026 BERC-Approved Rates
Our calculator uses the official tariff rates approved by the Bihar Electricity Regulatory Commission (BERC). Updated May 2026 to reflect the current slab structure for both NBPDCL and SBPDCL.
Complete Slab-wise Breakdown
See exactly how much each slab of units costs, with visual charts showing the cost distribution across energy charges, FAC, fixed charges, meter rent, and electricity duty.
Domestic & Commercial
Supports both domestic (residential LT-1) and commercial (LT-2/LT-3) tariff calculation with separate slab structures for each connection type.
Mobile-Friendly Design
Works perfectly on all devices — mobile, tablet, and desktop. No app download needed. Get your Bihar bijli bill estimate in seconds on any browser.
100% Free, No Login
No registration, no login, no personal data required. Just enter your units and get your bill estimate instantly. We don't store any of your data.
Bill Savings Simulator
Use the savings chart to see exactly how much you'd save by reducing your consumption by 10% or 20%. Plan your energy usage smartly to lower your monthly bill.
8 Proven Ways to Reduce Your Bihar Electricity Bill
Practical tips backed by energy efficiency data — start saving from this month itself
Stay Below 125 Units
Bihar's free slab covers the first 125 units. Staying under this threshold means zero energy charges — only fixed charges apply. Track your usage with a smart meter or your meter reading.
Switch to LED Lighting
A 9W LED bulb gives the same light as a 60W incandescent bulb — using 85% less electricity. Replacing 5 old bulbs saves roughly 25–30 units per month, keeping you closer to the free slab.
Set AC at 24°C, Not 18°C
Every 1°C reduction below 24°C increases AC power consumption by 6%. Setting your AC at 24°C instead of 18°C saves up to 36% of AC electricity costs — the biggest bill reducer for most households.
Use 5-Star Rated Appliances
A 5-star rated refrigerator uses 25–35% less electricity than a 3-star model. Upgrade when replacing old appliances — the savings over 5 years typically exceed the price difference.
Eliminate Standby Power
Appliances on standby — TVs, chargers, set-top boxes — collectively consume 5–10% of your total electricity. Use power strips with switches and turn off devices at the wall when not in use.
Run Geyser / Water Heater Wisely
A water heater running for 2 hours consumes 3–4 units daily — 90–120 units monthly. Use a timer, heat water only as needed, and lower the thermostat to 50°C rather than the default 60°C.
Natural Ventilation Before AC
Before switching on the AC, open windows and doors in the early morning and evening for natural cross-ventilation. Reducing AC running time by even 1 hour daily saves 15–20 units per month.
Check for Meter & Billing Errors
Incorrect meter readings and billing errors are more common than people realise. Compare your current meter reading with the previous bill. If your consumption seems unusually high, raise a complaint with NBPDCL or SBPDCL directly.
How to Calculate Bihar Electricity Bill — Step by Step
Manual formula and step-by-step walkthrough with a real example
You can calculate your Bihar electricity bill manually using the official formula, or use the calculator above for instant results. Here's how the manual calculation works:
Step 1: Determine Your Monthly Units Consumed
Read your electricity meter at the start and end of the billing period. Subtract the previous reading from the current reading. The difference is your monthly consumption in kWh (units). Alternatively, check your last NBPDCL or SBPDCL bill — it will show the units consumed for that billing cycle.
Step 2: Apply the Energy Charge Slabs
For domestic connections in Bihar 2026: the first 125 units are completely free (₹0). Units above 125 are charged at ₹5.52 per kWh. For example, if you consumed 200 units, your energy charge = (200 – 125) × ₹5.52 = 75 × ₹5.52 = ₹414.
Step 3: Add Fixed Charges
Add the fixed monthly charge (₹80 for domestic, ₹100 for commercial) and meter rent (₹25 for domestic, ₹40 for commercial). These are mandatory and don't change with your consumption. Total fixed = ₹80 + ₹25 = ₹105.
Step 4: Calculate FAC (Fuel Adjustment Charge)
FAC = Total units consumed × ₹0.15. For 200 units: FAC = 200 × ₹0.15 = ₹30. Note that FAC applies to ALL units, including the first 125 free units.
Step 5: Calculate Electricity Duty
Electricity Duty = 5% of energy charges only. For ₹414 energy charges: Duty = ₹414 × 5% = ₹20.70. Duty does not apply to fixed charges, meter rent, or FAC.
Step 6: Sum Up Your Total Bihar Bill
This is your estimated Bihar electricity bill for 200 units. The actual bill may differ slightly due to billing cycle adjustments or updated FAC rates. Use our calculator above to get instant results without manual calculation.
❓ Bihar Electricity Bill FAQs
Answers to the most common questions about Bihar bijli bill calculation and tariff rates
✅ Why You Can Trust electricbillcalculate.in
Official Tariff Sources
All tariff data sourced directly from BERC (Bihar Electricity Regulatory Commission) official tariff orders and NBPDCL/SBPDCL notifications.
Regularly Updated
Our calculator is updated every time BERC revises tariffs. Last updated May 2026 to reflect the current 2026 tariff schedule.
1 Lakh+ Monthly Users
Trusted by over 1 lakh Bihar residents and businesses every month for accurate electricity bill estimates before the actual bill arrives.
Privacy Guaranteed
We collect zero personal data. No login, no registration, no tracking of your consumption data. 100% private and secure.
Made in India
Built specifically for Indian electricity consumers. Covers 16+ Indian states with state-specific tariff data.
Electricity Experts
Our team follows every BERC, DERC, UERC, and MERC tariff order closely to keep all calculators accurate and up to date.