Water is the charge tenants argue about most, and usually for a good reason: it is the one that changes every month, and the one they are least often shown the working for.
The fix is not a better explanation after the fact. It is a bill that cannot be argued with because it shows how it was reached.
The four numbers
Every metered charge you issue should carry all four of these, every time:
- Previous reading: where the meter stood at the last bill
- Current reading: where it stands now
- The difference: units consumed
- The rate: what one unit costs
Drop any one of them and the charge becomes an assertion. A tenant who wants to check it cannot, and a tenant who cannot check a charge will eventually decide it is wrong, whether or not it is.
This is the entire content of sub-metering done properly. Nothing about it is technically difficult. It is skipped because at billing time it is faster to write a total.
Read on a consistent cycle
A bill covering 27 days followed by one covering 38 will swing, and the tenant has no way to know why. They will read the second bill as a price rise.
Read on the same date each month, as near as the caretaker's rounds allow, and put the period covered on the bill. Where a reading genuinely cannot be taken, estimate it, but say on the bill that it is an estimate, and true it up on the next actual reading rather than letting the estimate quietly become the baseline.
Record who took each reading. Not for blame: because when a reading looks wrong, the fastest route to the truth is asking the person who took it while they still remember the round.
Check the preview before the bills go out
Meter misreads are the single most common cause of a water dispute, and almost all of them are catchable in about a minute.
Before issuing a run, sort the charges by largest change against last month. A charge that has jumped tenfold is almost never a tenant who suddenly started filling a swimming pool. It is a digit transposed, a meter that has rolled over, or a reading taken from the wrong unit's meter. A charge that has dropped to nothing is usually a meter that has stopped, or a unit somebody forgot to read.
Both are easy to fix before issue and expensive to fix after. After issue you are not correcting a number; you are rebuilding confidence. See running a billing run for the rest of that check.
Decide what happens to the difference
The sum of your sub-meters will not equal the main meter. It never does. Common areas consume, meters have tolerances, and older pipework loses water.
Somebody has to decide how that gap is handled. The options are all defensible: absorb it as a landlord cost, recover it through service charge, or apportion it across units on a stated basis. What is not defensible is quietly inflating everyone's rate to cover it, because that is the one approach that cannot be explained if anyone asks.
Whatever you choose, write it into the lease or the tenancy pack, and show it as its own line rather than folding it into the consumption figure.
Do not mark up the rate silently
Charging tenants more per unit than the building is charged turns a cost recovery into a margin.
Whether that is permitted depends on your arrangement and the applicable regulations, and it is worth taking advice on rather than assuming. What is unambiguous is that doing it without saying so is a dispute in waiting. A tenant who compares your rate to the published tariff and finds a difference you never mentioned will not conclude that you had a reasonable basis for it.
If there is a legitimate administrative cost in running the sub-metering, show it as an administrative line. A named charge can be discussed. A hidden one can only be discovered.
When a tenant disputes a reading
Have a procedure and use it the same way every time:
- go and read the meter again, with the tenant present if they want
- compare against the reading on the bill and the one before it
- if the meter has been misread, issue a correcting entry rather than editing the original
- if the meter has failed, replace it and agree a basis for the period it was wrong
That last point matters more than it looks. Corrections that leave the original visible are what makes a billing history evidence. A history that can be silently edited proves nothing, including the months when you were right.
Most water disputes are not really about the money. They are about a tenant being handed a figure and told to trust it. Four numbers and a consistent reading date remove the need for trust entirely, which is a better outcome for everybody than winning the argument.
How to split a shared water bill between units
Not every block has sub-meters. Where one bulk meter serves several doors, the bill still has to be divided, and the method must be written into the tenancy rather than decided each month by whoever is doing the billing.
The defensible options, roughly in order of fairness:
Install sub-meters. The only method that charges each household for what it used. The capital cost is recovered quickly in a block of any size, mostly through the consumption drop that follows people seeing their own usage.
Apportion by occupancy. Charge per occupant rather than per unit. Closer to actual consumption than equal shares, and it requires you to track declared occupancy, which tenants update reluctantly.
Apportion by unit size or bedroom count. A weighted split using a factor per unit type. Crude, stable, easy to explain, and reasonable where unit sizes genuinely vary.
Equal shares. Simple and transparent, and it systematically overcharges the single occupant to subsidise the household of six. Acceptable in small, similar blocks; a persistent grievance in mixed ones.
Whichever you use, three rules apply. State the method in the lease, not just in practice. Show the whole bulk bill on the tenant's statement alongside their share, so the split can be checked. And keep the method stable. Changing the basis mid-tenancy, even to something fairer, reads as a price rise, and it should be discussed before it is applied.
Prepaid tokens and how they change the job
Where units are on prepaid power or water tokens, the tenant buys credit directly and the consumption question largely disappears. Two things replace it.
First, the standing charges do not disappear. Common-area power, the borehole pump, the water tanker deliveries during a shortage, and maintenance on the pump and tank are all real costs and all shared. They belong in a named line, usually within service charge, with the basis of the split stated, rather than appearing as a mysterious uplift.
Second, the meter balance becomes a handover item. A tenant moving into a unit with a nearly exhausted prepaid balance discovers it at nine at night in week one, and it is entirely preventable: record the token balance at move-in and move-out alongside the readings, exactly as you would a postpaid meter.
What a leak does to a bill, and who pays
A high consumption figure is sometimes a genuine leak, and the bill from a running cistern over three weeks is large enough to matter to everybody involved.
Handle it as a process rather than a negotiation:
- Verify. Read the meter with everything in the unit turned off. A meter still moving is a leak, and where it is moving tells you whether it is inside the unit or in the supply line.
- Locate and fix immediately. Every day of investigation is metered.
- Attribute honestly. A failed cistern valve, a cracked supply pipe or a faulty fitting is a building problem and a landlord cost. A tap left running or damage caused by the tenant is not. Concealed leaks in the supply line are almost always the landlord's.
- Agree the adjustment on a stated basis. The usual approach is to charge the tenant their normal consumption, taken as an average of recent months, and treat the excess as a landlord cost or a shared one, on terms the lease sets out.
A leak policy written before it happens takes twenty minutes and settles a case that otherwise takes three weeks of messages.
Estimates, rollovers and replaced meters
Three situations break the four numbers, and each has a correct treatment.
A reading could not be taken. Estimate from recent consumption, mark the bill clearly as an estimate, and true it up on the next actual reading rather than letting the estimate become the new baseline. Two consecutive estimates on the same unit should be treated as a fault to be fixed, not a routine.
The meter rolled over. A mechanical meter that passes its maximum returns to zero, producing either an enormous consumption or a negative one. The correction is arithmetic, and it belongs on the bill in words so the tenant can see what happened.
The meter was replaced. Record the final reading of the old meter, the serial and starting reading of the new one, and the date, and bill the period in two parts. A replacement handled silently produces a bill nobody can reconcile against either meter.
The record a dispute actually needs
When a tenant challenges a water charge a year later, what settles it is the history, not the current figure: every reading, its date, who took it, the rate applied, and any correction shown as a correction rather than an edit.
That is why corrections have to be new entries. A history that could have been silently changed proves nothing at all, including the eleven months where your billing was exactly right. The general form of this is in a paper trail that survives a question.
Doing this at portfolio scale by hand is possible and tedious, which is what utility billing software for Kenyan landlords exists to remove: readings entered once against a unit, consumption and rate printed on the bill as arithmetic, estimates flagged, corrections posted forward, and a reading history that survives a question.
Common questions
How should tenants be billed for metered water?
With all four numbers on the bill: previous reading, current reading, units consumed, and the rate per unit, plus the period covered. Anything less is an assertion the tenant cannot check.
Can a landlord charge more per unit of water than the utility charges?
Marking up the tariff turns cost recovery into a margin, and whether it is permitted depends on your arrangement and the applicable rules, so take advice rather than assuming. What is never defensible is doing it silently. A legitimate administrative cost should appear as its own named line.
What should I do when a tenant disputes a water bill?
Re-read the meter, with the tenant present if they want, and compare against the two readings behind the bill. If it was misread, issue a correcting entry rather than editing the original; if the meter has failed, replace it and agree a basis for the affected period.
How do I split one water bill between several units?
Sub-meters where possible; otherwise apportion by occupancy, by unit size, or equally, with the method written into the lease and the bulk bill shown alongside each tenant's share. Consistency matters more than which method you pick.
Who pays for water lost to a leak?
Generally the landlord, where the leak is a building fault such as a failed valve or a cracked supply line, and the tenant where they caused it. Charge the tenant their normal consumption for the period and treat the excess separately, on a basis the lease states in advance.
Why do the sub-meters never add up to the main meter?
Common-area use, meter tolerances and losses in old pipework. The gap is normal; what matters is that the lease says how it is handled, whether absorbed, recovered through service charge, or apportioned on a stated basis, and that it appears as its own line rather than hidden inside everyone's rate.
Is a photograph of the meter necessary?
It is the cheapest insurance in utility billing. A dated photograph showing legible digits and the meter serial settles almost every reading dispute in one message, and it removes the possibility that a reading was taken from the wrong unit's meter.