Estimate your Kerala home electricity bill from the official tariff: slabs, fixed charge, surcharges, duty and subsidy.
Quick answer
KSEB bills homes every two months. Up to 250 units a month on average, units are billed slab by slab: ₹3.35, ₹4.25, ₹5.35, ₹7.20 and ₹8.50 for each 50-unit step. Above 250 units a month, every unit is billed at one rate, from ₹6.75 to ₹9.20. Fixed charges of ₹50 to ₹310 a month and 10% electricity duty are added.
Rates last checked 9 November 2026 against official tariff orders. Values marked "see your bill" change month to month.
| Item | How it is worked out | Amount |
|---|
Kerala domestic slab rates
| Units per two months | Rate per unit |
|---|---|
| 1–100 | ₹3.35 |
| 101–200 | ₹4.25 |
| 201–300 | ₹5.35 |
| 301–400 | ₹7.20 |
| 401–500 | ₹8.50 |
Crossing 250 units a month
Below 250 units a month, only the higher units cost more. Above it, Kerala switches to one rate for every unit, so the bill can jump. Try 500 and 510 units (two months) in the calculator.
How to use this calculator
- Enter the units from your bill (current reading minus previous reading).
- Copy any monthly surcharge percentage from your latest bill. It changes every month.
- The result is an estimate. Meter rent, arrears, late fees, rebates and rounding are not included.
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Official sources
This calculator is built from official tariff orders and does not rely on third-party wording.