Off-season 300 kWh
Input: 300 kWh, regular tiers
Result: Crosses tier 2; bill includes both 120원/kWh and 214.6원/kWh segments
Korea Electricity Bill Calculator
Enter your monthly kWh usage to estimate a Korean residential (low-voltage) electricity bill — base charge, progressive energy charges, 10% VAT, and 3.7% industry fund. Summer relaxation for July–August is supported.
Usage
Enter the usage shown on your meter or KEPCO bill.
Formula and decision logic
A Korean residential electricity bill is the sum of a tiered base charge, progressive energy charges, 10% VAT, and a 3.7% industry fund — with relaxed tier thresholds in July and August.
Subtotal = base charge + Σ (usage in tier × tier rate)
Total bill = (subtotal × 1.137) rounded down to nearest 10 KRW
Worked examples
Summer 300 kWh
Input: 300 kWh, summer relaxation on
Result: Stays inside tier 1 (300 kWh limit), so the bill is noticeably lower
How to use this calculator
- 1Enter your monthly kWh usage
- 2Toggle summer relaxation in July or August
- 3Press Calculate to see the bill
- 4Check the per-tier breakdown to spot where charges climb
How to read the result
- Most savings come from staying inside the first tier — summer relaxation effectively shifts the threshold to 300 kWh.
- The base charge alone changes drastically between tiers (910 / 1600 / 7300 KRW), so crossing 400 kWh has an outsized impact.
Common input mistakes
- Multiplying total usage by the highest tier rate instead of splitting per tier.
- Forgetting to add VAT and the industry fund (≈ 13.7% on top of the subtotal).
Frequently asked questions
How is the bill structured?
Tiered base charge + progressive energy charge, then 10% VAT and 3.7% electricity industry fund.
What is summer relaxation?
In July and August the tier thresholds expand from 200/400 kWh to 300/450 kWh, lowering bills at the same usage.
Why might my real bill differ?
Mandatory-usage guarantees, multi-child or welfare discounts, time-of-use plans, and different reading dates can change the actual bill.
Can I just multiply usage by one rate?
No. Korean residential rates are progressive, so each tier of usage is billed at its own rate. The calculator splits usage by tier correctly.