Korea Electricity Bill Calculator

Korean electricity is billed on KEPCO's progressive rate system, where each kilowatt-hour gets more expensive the more you use. That makes the final amount hard to predict, and it often arrives as an unpleasant surprise at the end of the month. This app turns an energy meter you already have into a live electricity-bill tracker. It reads your ongoing consumption and, following your meter-reading day and the seasonal progressive rates, continuously estimates what the current billing period will cost. You always know how much you have spent so far, how much today alone has added, what to expect by the end of the period, and when you are about to cross into a pricier tier, so you can adjust your usage in time and avoid bill shock. Beyond residential progressive rates (low and high voltage), it also supports general, educational, industrial, agricultural and off-peak contract types including time-of-use pricing with KEPCO's Saturday and holiday metering rule, and applies large-family, newborn-household and welfare (e.g. national-merit) discounts.

Read more ›

Supported devices

Korea Electricity Meter

What’s new

Version 1.9.0 — Fixed misleading guidance about the residential voltage type. The old hint said high voltage is "mainly used in apartments"; following that advice can throw the bill off badly. Residential low/high voltage is not decided by your household meter but by the contract the building holds with KEPCO: a comprehensive contract bills each household at the low-voltage rate, and only a single contract uses the high-voltage rate. For 994 kWh in summer that is 289,150 KRW on low voltage versus 235,970 KRW on high voltage - a 53,180 KRW (about 18%) gap. The setting hint and the option names now read "Low Voltage (house / apartment on a comprehensive contract)" and "High Voltage (apartment on a single contract)", and point you at your building management office. Also correcting the 1.8.0 notice: re-adding the device is only needed on a time-of-use tariff (General(A)II / Industrial(A)II). Residential and flat tariffs are unaffected, and re-adding them only discards Insights history and meter baselines. Internally, the basic charge is now read from the merged rate table for each month so future revisions to it cannot be missed (no change to results under the current rates).

View changelog