Free tool
Electricity Bill Calculator
Enter your monthly electricity usage in units (kWh) and see an estimated CEB bill with a block-by-block breakdown of energy charges plus the fixed charge. Tariffs are based on the mid-2024 CEB revision — always verify against the current CEB schedule, which changes with tariff revisions.
Electricity bill calculator
CEB domestic (household) block tariff
| Block | Units | Rate (LKR/kWh) | Charge (LKR) |
|---|---|---|---|
| 1–30 kWh | 30 | 6 | 180 |
| 31–60 kWh | 30 | 9 | 270 |
| 61–90 kWh | 30 | 18 | 540 |
| 91–120 kWh | 30 | 30 | 900 |
Energy charge
LKR 1,890
Fixed charge
LKR 1,000
Total bill
LKR 2,890
Tariffs as of mid-2024 CEB revision — verify with CEB. Excludes any taxes, fuel adjustment charges, or subsequent tariff revisions.
Frequently asked questions
How does CEB's block tariff work?
Your monthly units are split across consumption blocks, each charged at its own rate, plus a fixed monthly charge that depends on your usage band. Lower-usage households pay substantially less per unit.
Why is my actual bill different from the estimate?
The estimate excludes items like fuel adjustment charges and taxes, uses the simplified block table, and CEB revises tariffs periodically. Use it as a close approximation, not an exact bill.
How can I reduce my electricity bill?
Because the tariff is block-based, cutting usage below a block boundary (e.g. under 60 or 90 units) can reduce your bill disproportionately. Solar net metering is also popular for higher-usage homes.
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