[Korea] Electricity Bill
Electricity Bill — runs in your browser. Inputs are not stored.
Approximate electricity bill
Enter values, then press Calculate.
Approximation based on user-entered rates for progressive tiers 2–3. Actual bills (base fee, VAT, fuel cost, etc.) may differ.
How to use
- Enter usage (kWh). The default example is 300. Compare with the energy charge bands on your bill.
- Edit tier 1 cap and tier 1 rate, tier 2 cap and tier 2 rate, and tier 3 rate to match the tariff. Defaults are 200/400 kWh and 120·200·300 KRW.
- The tier 2 cap must be greater than tier 1, or nothing is calculated.
- Press Calculate to see an estimated charge. Basic fee, VAT, fuel-cost adjustment, and climate/environment charges are not included.
- If it differs from a KEPCO bill, rates or extra line items are why. Gas and water are not this tool.
Key concepts
The electricity bill calculator estimates progressive (tiered) charges, KRW per kWh, and residential power cost. Usage is split into tier 1, tier 2, and the rest, each multiplied by its rate. You enter caps and rates, so you must match seasonal and contract-type notices yourself. It approximates the energy charge only; basic fee and VAT are omitted.
Taxes, essential-use deductions, and welfare discounts are not included. It is an approximation and can differ from the invoice. Math is local. Missing basic fee, VAT, fuel-cost adjustment, and essential-use deduction is why it diverges from a KEPCO bill. Gas and water are out of scope. Edit caps to match the tariff table.
Example
300 kWh, tier 1 200 kWh × 120 KRW, tier 2 cap 400 at 200 KRW → 200×120 + 100×200 = 24,000+20,000 = 44,000 KRW. At 500 kWh you add 200 kWh of tier 2 plus 100 kWh of tier 3 × 300 KRW. Changing rates to match a bill changes the number. 250 kWh at the same rates is 24,000+10,000=34,000 KRW. 180 kWh stays in tier 1 × 180. 420 kWh includes some tier 3.
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Frequently asked questions
Why doesn’t this match a KEPCO bill?
Rates, basic fee, VAT, fuel-cost adjustment, and other extras can differ. It is an approximation. If the billed total differs, check extra items on the bill.
Can I change progressive-tier caps and rates?
Yes. You enter caps and rates yourself to match contract and season.
Is electricity usage sent to a server?
No. Multiplication runs only in this browser.
Does the same calculator do gas and water?
This tool is electricity (kWh) only. There is no city-gas calculation.
Is VAT included in the electricity bill?
No. It is rate × usage. Unless your rate already includes tax, tax is omitted.
Can I use only tier 1 and drop tiers 2 and 3?
Set the tier 2 cap high enough and keep usage from reaching tier 3. The structure is still three tiers. The tier 2 cap must be greater than tier 1.
Last reviewed: 2026-09-04