수도요금 가이드 - 계산·감면·절약

※ This is an unofficial information guide. It is not affiliated with public institutions such as the Seoul Metropolitan Waterworks Headquarters Arisu (https://arisu.seoul.go.kr). Please proceed with applications and payments through official channels.

Do you know why your monthly water bill comes out to this amount?

Water bills consist of three components: the water supply fee, the sewage fee, and the water usage charge, with an additional basic fee based on the meter size. Starting in 2026, the progressive rate system for residential sewage in Seoul will be abolished, and a single unit price of 480 won/㎥ will be applied. 'Water Bill Guide' is an unofficial information guide app that compiles this fee structure, reduction schemes, and water conservation practices in one place.

[Water Bill Summary]

Water Bill = Basic Fee + Water Supply (580 won per ㎥) + Sewage (480 won per ㎥, single rate from 2026) + Water Usage Charge (170 won per ㎥). As this is a service supplied by a local government, it is exempt from Value Added Tax (VAT). (Based on Seoul Residential Rates)

[2026 Unit Price List (Seoul Residential)]

• Water Supply Rate — 580 won per cubic meter

• Sewerage Rate — 480 won per cubic meter (Progressive rate system abolished, single unit price)

• Water Usage Charge — 170 won per cubic meter (Funding for Han River Basin Management)

• Basic Rate 15mm — 1,080 won per month / 20mm — 3,000 won per month / 25mm — 5,200 won per month

[Estimated Bill for 25㎥ Usage]

Basic Rate 1,080 won + Water Supply 14,500 won + Sewerage 12,000 won + Water Usage Charge 4,250 won = Approx. 31,830 won (VAT Exempt)

[Reduction Systems You Shouldn't Miss]

• Recipients of Basic Livelihood Support — 30% reduction (Up to 30㎥ per month)

• Households with 2 children — 10% reduction

• Multi-child households with 3 or more children — 20% reduction

• Self-meter reading registration — Additional monthly discount of 500 won

• Switch to electronic billing (e-Bill) — Discount of approximately 150 won per transaction

※ This is not applied automatically; you must apply directly at the Community Center or the relevant waterworks office.

** [What This App Helps You With]

✓ Guide to the water bill calculator that instantly calculates the bill amount upon entering usage

✓ 4-item self-assessment for eligibility for discounts

✓ 13-step checklist for practicing water conservation and discounts

✓ Manage usage check times with D-Day notifications for meter reading and payment due dates

✓ Summary of unit price tables and calculation formulas for water supply, sewage, and water usage charges

✓ Guide to unit price differences by business type (Residential, Commercial, Industrial, Bathhouse)

✓ Methods for meter location, self-reading, and leak inspection

✓ Guide to preventing pipe freezing and thawing in winter

✓ 20 Frequently Asked Questions (FAQ) - Bimonthly billing, late payment penalties, installment payments, etc.

✓ 50 tips on water basics + 50 quiz questions on the abolition of progressive rates and discounts

[Recommended for These People]

• Those who do not understand how water bills are calculated even after looking at their bills

• Those eligible for basic livelihood support or multi-child family discounts but have not applied

• Those who want to reduce their water bills by installing water-saving devices or improving their lifestyle habits

• Those who suspect a leak and are curious about how to inspect it Person

• Those who want to receive additional discounts by registering for self-meter reading and electronic billing

• Those who want to prevent meter freezing in winter

[Topics Covered]

We have organized all the information necessary for managing water bills in one place, including unit prices for Seoul's residential water supply, sewage, and water usage charges; the abolition of the progressive sewage rate system in 2026; basic rates by meter size; rate tables by industry; exemption systems for basic livelihood recipients, multi-child families, and self-meter reading; the effectiveness of installing water-saving devices; water-saving methods for toilets, washing machines, and showers; leak inspections and reporting for free inspections; winter freeze prevention; bimonthly billing cycles; late payment surcharges; and discounts for automatic payment and electronic billing.

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Advertisements are included on some screens to operate this free app. They are clearly separated from the content and do not interfere with self-diagnosis, checklists, or information verification.

[Disclaimer]

※ This app is not the official app representing the Seoul Metropolitan Waterworks Headquarters, the Ministry of Environment, or any government agency.

• Persons

• Persons

• Those who wish to receive additional discounts by registering for self-meter reading and electronic billing

• Those who wish to prevent meter freezing in winter

[Topics Covered]

• Persons

• Those who wish to prevent meter freezing in winter ※ This app provides information regarding water bills and does not replace the official application or payment procedures. Please check the Arisu Cyber ​​Customer Center for accurate unit rates, discount application details, and billing information.

※ Unit rates, discount rates, and basic charges are subject to change due to amendments to local government ordinances, and unit rates vary by region.

※ Source: Seoul Metropolitan Waterworks Headquarters Arisu (https://arisu.seoul.go.kr)