400 units electricity bill in Bihar
A home in Bihar that uses 400 units a month pays about ₹1,293 on today’s BERC tariff (order of 18 March 2026). That is ₹3.23 a unit, with all the charges our calculator adds.
- ₹1,293 a month
- ₹3.23 a unit
- NBPDCL, SBPDCL
How the 400-unit bill adds up
| Slab (units) | Units × rate | Amount |
|---|---|---|
| All units (one rate) | 400 × ₹7.42 | ₹2,968.00 |
| Energy charge | ₹2,968.00 | |
| Fixed charge | ₹160.00 | |
| Government of Bihar tariff subsidy | −₹1,320.00 | |
| Mukhyamantri Vidyut Upbhokta Sahayata Yojana: 125 units free | −₹515.00 | |
| Bill | ₹1,293.00 | |
Urban home, default options of the Bihar calculator, monthly bill. Source: BERC Tariff Order for NBPDCL & SBPDCL, FY 2026-27 (uniform state-wide tariff).
What changes the bill
- The Government of Bihar tariff subsidy takes ₹1,835 off. Before it, the bill is ₹3,128.
- One more unit adds ₹4.12.
- At 350 units the bill is ₹1,087; at 450 units it is ₹1,499.
Where 400 units sit in the Bihar slabs
All 400 units are charged at one rate: ₹7.42 a unit.
Of the bill before any scheme, the energy charge is 95%, the fixed charge is 5%.
400 units a month is about 13.3 units a day. The bill is about ₹43 a day.
What this figure includes
- BERC tariff before the State subsidy; the subsidy and the 125 free units are shown as their own lines.
- Smart-metered homes are on mandatory ToD: 80% of the rate 09-17 h, 110% 17-23 h. This estimate uses the flat rate.
- Electricity duty and FPPAS not included.
Questions
How much is the electricity bill for 400 units in Bihar?
About ₹1,293 for 400 units a month on the Bihar tariff, with the calculator’s default options. Your load, phase and any monthly fuel charge can change it.
What is the per unit rate for 400 units in Bihar?
The average is ₹3.23 a unit, with all charges. The last units are charged at ₹7.42 each in the tariff.
How many units a day is 400 units a month?
About 13.3 units a day. One unit is one kWh: a 1,000-watt load for one hour.
How do I lower a 400-unit bill?
Use the appliance calculator to find what uses the most power.