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Calculate your water bill
Estimate metered water and sewerage charges using the selected provider’s gazetted tariff. One-off deposits, connection fees, penalties and arrears are excluded from the monthly estimate.
Water and sewerage
| Charge | Basis | Amount |
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Sewer-only account
| Charge | Basis | Amount |
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Cost curve
Compare providers on exactly the same billing characteristics. The graph and table use the billing month, customer category, sewerage status and consumption entered in the calculator above.
| Provider | Category applied | Water | Sewerage | Total at current use | Effective cost |
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Tariff structure
Kenya’s regulated water tariffs combine a customer category with a consumption schedule. Most metered accounts use an increasing-block tariff: the first units are billed at the lowest rate and only the units that cross into a later block are charged at the higher rate. Sewerage is calculated separately, while deposits, connection fees, penalties and most meter-related charges are not ordinary monthly consumption charges.
Measure monthly consumption
The provider subtracts the previous meter reading from the current reading. One cubic metre equals 1,000 litres. Estimated billing may apply when a meter is inaccessible or non-functional, subject to the approved tariff conditions.
Apply the customer category
Domestic, commercial, government, education, multi-dwelling, kiosk and bulk accounts can have different rates because their use patterns and cross-subsidy roles differ.
Allocate units across blocks
For an increasing-block tariff, consumption is split across successive bands. A household using 15 m³ pays the first 6 m³ at the lifeline rate and only the remaining 9 m³ at the second-block rate.
Add sewerage where connected
Many approved schedules charge sewerage on 75% of metered water use. The charge can use a separate sewer tariff or, for some providers, the water tariff schedule applied to the reduced sewerage volume.
Check uniform and special rates
Multi-dwelling units, kiosks, standpipes and bulk customers may use a single per-m³ rate instead of progressive blocks. Sewer-only domestic accounts may instead attract a flat monthly charge.
Confirm period and indexation
A gazetted tariff normally applies for a defined multi-year period. Approved tariffs may be indexed for inflation during that period, so the applicable notice and billing date must always be checked.
Worked example using your calculator inputs
| Service | Block calculation | Amount |
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Historical cost per cubic metre
Effective average cost at a constant domestic consumption benchmark.
| Tariff period | Water per m³ | Sewerage per m³ | Total per m³ | Change | Source |
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