400 units electricity bill in Assam (APDCL bill)
A home in Assam that uses 400 units a month pays about ₹2,578 on today’s AERC tariff (order of 6 March 2026). That is ₹6.45 a unit, with all the charges our calculator adds.
- ₹2,578 a month
- ₹6.45 a unit
- APDCL
How the 400-unit bill adds up
| Slab (units) | Units × rate | Amount |
|---|---|---|
| 1–120 | 120 × ₹4.25 | ₹510.00 |
| 121–240 | 120 × ₹6.30 | ₹756.00 |
| 241–300 | 60 × ₹7.20 | ₹432.00 |
| 301–500 | 100 × ₹7.40 | ₹740.00 |
| Energy charge | ₹2,438.00 | |
| Fixed charge | ₹140.00 | |
| Bill | ₹2,578.00 | |
Urban home, default options of the Assam calculator, monthly bill. Source: AERC Tariff Order for APDCL FY 2026-27.
What changes the bill
- One more unit adds ₹7.40.
- At 350 units the bill is ₹2,208; at 450 units it is ₹2,948.
Where 400 units sit in the Assam slabs
The 400 units cross 4 slabs. The last 100 units are in the 301–500 slab, at ₹7.40 a unit. Each extra unit in this slab costs that much.
The first 120 units cost ₹4.25 each.
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 ₹86 a day.
What this figure includes
- Consumer-payable rates after the GoA targeted and tariff subsidy, as tabulated in the AERC order.
- FPPPA and electricity duty not included.
Questions
How much is the electricity bill for 400 units in Assam?
About ₹2,578 for 400 units a month on the Assam 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 Assam?
The average is ₹6.45 a unit, with all charges. The last units are charged at ₹7.40 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.