Metered and unmetered charging
An unmetered household pays no charge per cubic metre, so a leak does not change the bill by a single penny. The water is still leaving the system, it can still cause damage, and it still has to go somewhere, but the cost of it is not on your bill.
Last reviewed 14 August 2026. Rates correct as of 14 August 2026
The short answer
Whether a leak costs you anything at all depends on how your household is charged, and there are three arrangements in the UK.
| Arrangement | Where | Effect of a leak on the bill |
|---|---|---|
| Metered, volumetric rate per cubic metre | England and Wales, and metered households in Scotland | The bill rises by the leaked volume multiplied by the rate. |
| Unmetered, charge based on rateable value | England and Wales | No change. There is no volumetric element to move. |
| Unmetered, charge set by Council Tax band | Scotland, collected by the council | No change. |
| Domestic water not charged at all | Northern Ireland | No change. Domestic customers are not billed for water. |
On this site the cost figure is suppressed with a reason in the last three cases rather than shown as nothing. Zero reads as a bug; the reason reads as a fact.
How this works in practice
The calculators still work, and they still answer the more important half of the question. Only the money half changes.
- Rate of loss, daily volume and annual volume are physical quantities. They are identical in Belfast, Glasgow and Bristol, because water does not know how it is billed.
- Severity is a classification of the rate, so it is unaffected too. A major loss is a major loss whether or not anybody charges for it.
- The next action is unaffected. Finding a leak matters for the damage it does, and that is true at every charging arrangement.
- Only the cost is suppressed, in its usual fourth position, with a sentence saying why.
So an unmetered household should still measure the loss. measure the rate of loss at the meter anyway still applies wherever a meter exists to read, including a meter fitted but not used for charging.
What changes the answer
Three things, and the middle one is the one people are surprised by.
- Switching to a meter. A metered household is charged for leaked water from the moment the meter is charging, so a leak that cost nothing yesterday costs something today.
- Being in Scotland with a meter. Scottish household charging is often described as being through Council Tax, and that is true of unmetered households. A metered Scottish household does pay a volumetric rate, so the leak has a cost.
- Having a meter fitted but not being charged on it. Some properties have a meter for monitoring while still being billed unmetered. The leak costs nothing, and the meter still measures it, which is the best of both for diagnosis.
None of this changes whose responsibility the pipe is. A supply pipe leak is normally the property owner's to repair regardless of how the water is charged for.
Assumptions and sources
Litres in a cubic metre
Exact by definition
SI definition. The litre is defined as one cubic decimetre, so one cubic metre is exactly 1,000 litres.
The three charging arrangements are how household charging is structured rather than figures to be sourced, and no amount is quoted on this page. Which arrangement applies to you is on your own bill.
The Scottish and Northern Irish arrangements are the reason this site suppresses the cost attribute rather than defaulting it. Both are common enough that a calculator quietly showing zero pounds would be misread as a working figure by a large number of readers.
What to do next
Two things, and neither depends on being charged for the water.
- Find the loss anyway. The water is going somewhere, and where it goes is the part that causes expense, whether or not the volume appears on a bill.
- Check who is responsible for the pipe it is leaking from. Responsibility usually follows the boundary rather than the charging arrangement, so a free-to-you leak can still be yours to fix.
Common questions
- If a leak costs me nothing, does it matter?
- Yes, for two reasons that have nothing to do with the bill. Water escaping under pressure has to go somewhere, and where it goes can mean saturated ground, damaged structure or an undermined drive. And a leak on your side of the boundary is normally yours to repair whether or not you are charged for the water.
- How do I know whether I am metered?
- You have a meter if there is one on your supply and your bill shows a volume in cubic metres and a rate per cubic metre. An unmetered bill shows a fixed amount based on the rateable value of the property, or in Scotland a Council Tax band, with no volume on it at all.
- Why does the calculator show a reason instead of a cost?
- Because zero would read as a bug and invite somebody to fix it. The honest answer for an unmetered household is not that the leak costs nothing to calculate, it is that no volumetric charge exists to apply, and saying so is more useful than showing a zero.
- Would a meter have shown me this leak?
- A meter is what makes the loss measurable, so yes. Without one there is no volume reading at all, and a leak can run for years without leaving a trace on a bill that never varies. That is worth knowing before deciding whether a meter is worth having.