Water Bill Calculator Pakistan
Estimate your monthly water and sewerage charges based on your plot size, city, and property type. Karachi Water and Sewerage Corporation (KWSC) has revised rates by 7.05% for FY 2026-27, effective from July 1, 2026
Introduction
Water and sewerage charges are a recurring monthly expense for households and businesses in Pakistan. In Karachi, the Karachi Water and Sewerage Corporation (KWSC) is responsible for billing, and rates are revised annually based on the Consumer Price Index (CPI) [citation:3][citation:16]. For FY 2026-27, the Sindh government approved a 7.05% increase in water and sewerage charges, effective retrospectively from July 1, 2026 [citation:10].
What is this calculator?
The Water Bill Calculator Pakistan estimates monthly water and sewerage charges based on plot size and property type. It covers residential and commercial consumers, with rates reflecting the latest 2026-27 revision.
How the calculation works
Water and sewerage charges for residential properties are determined by plot size (square yards). Larger plots pay higher monthly charges. Commercial establishments pay fixed monthly rates based on business type.
Formula
Monthly Water Bill = Base Rate (by plot size) × 1.0705 (7.05% increase)
Total Bill = Water Charges + Sewerage Charges
Important terms
- KWSC： Karachi Water and Sewerage Corporation — responsible for water and sewerage services in Karachi.
- Plot Size： Area of your property in square yards (e.g., 120 sq yd, 240 sq yd).
- CPI： Consumer Price Index — used as the basis for annual tariff adjustments.
- 7.05% Increase： The approved annual increase for FY 2026-27 [citation:16].
How to use the calculator
- Select your city (Karachi for KWSC rates).
- Select property type (Residential or Commercial).
- Enter your plot size in square yards (for residential).
- Click Calculate Water Bill.
Practical Pakistan-specific example
Example： Residential plot of 120 square yards in Karachi
- Based on typical KWSC rates for 120 sq yd (before increase): approximately Rs. 800–1,000/month
- After 7.05% increase: approximately Rs. 856–1,070/month
- Exact rates depend on the specific tariff schedule published by KWSC.
Factors affecting the result
- Plot size： Larger plots pay higher charges.
- Property type： Commercial rates are higher than residential.
- City： Water billing authorities vary by city (KWSC for Karachi, WASA for Lahore, etc.).
- Annual revision： Rates are revised annually based on CPI.
Common mistakes
- Using old rates before the 7.05% increase.
- Confusing water charges with sewerage charges (both are separate).
- Assuming flat rates regardless of plot size.
Who can use the calculator
- Homeowners： Estimating monthly water expenses.
- Tenants： Understanding utility costs.
- Business owners： Planning commercial water and sewerage costs.
Disclaimer
This calculator provides an estimate based on KWSC's 2026-27 revised tariff. Actual charges may vary based on your specific plot size, area, and official KWSC billing. Always verify with your official water bill.