This most often consists in a variable, progressive pricing system where the price per cubic meter is set and increases along with the consumption bracket. It is characterised by lower bills for low consumers, who are not necessarily the poorest, higher bills for high consumers, and the search for better preservation of resources by reducing consumption.
In certain pricing systems, attention is paid to ensure that there are no excessive discrepancies between the prices paid by the main categories of households in order to ensure more equitable prices, as this is not always the case.
But there are also pricing systems of an even more social nature which may be referred to as solidarity pricing.
This type of pricing is relatively recent, but is developing, sometimes even through municipal or national election campaigns, like in France in 2012. It current exists under different forms in some fifty countries, but only in certain cities or regions.
With the rise in the price of water and the dwindling of drinking water reserves, a number of municipalities and regions have sought various ways of limiting consumption and ensuring that the biggest consumers pay the highest price for their water (this principle is contrary to standard business practices where the more a customer buys, the cheaper it gets).
Obviously, this system only concerns people who are connected to a network, which limits their numbers, especially where it is particularly important to preserve the water resource.
As social pricing is not always easy to set up or exempt from additional management costs, it seems particularly suited to regions where water resources are limited, or where water tariffs are higher than elsewhere and/or give rise to glaring inequalities among user categories. However, it may be of less interest if it does not lead to significant savings in water and consumption for a large number of people.
This last type of pricing and measures aimed at the most deprived is described in factsheet B8 and is of a totally different nature. Indeed, contrary to what one might think, the word "social" frequently used in this type of pricing, only takes account of the volumes consumed, not the income of the households, which is not the purpose sought. There is no significant correlation between low consumption and low income. Likewise, large families, which are penalised by this system, are not more numerous among wealthy families than among low-income ones.
As already mentioned (see factsheet B1 giving general information of the cost of water and its pricing), in addition to special tariffs for farmers, public authorities or certain users or big industrial consumers, there are three main pricing methods :
- pricing by volume, which is the widely used
- flat-fee pricing, mainly used in small communities and sometimes at standpipes or for small groups of households, or when the installation, maintenance and reading of meters would be too costly.
Sometimes, several flat rates are set, according to estimated water consumption
- mixed pricing with a "two-part tariff", i.e. a combination of the first two, with a smaller fixed fee (standing charge, which may be excessive), but essentially based on the volume consumed ; this system is fairly widespread in several countries.
However, two other pricing systems are currently developing : so-called "social" pricing, detailed in this factsheet, and so-called solidarity pricing detailed in factsheet B8.
"Social" pricing comes down to setting price brackets, as previously mentioned, with prices rising in keeping with consumption. This boils down to establishing a system of forced "cross-subsidies" between low consumers and big consumers, while striving to avoid excessive discrepancies among the average prices of water paid by the different categories of households in order to ensure fairly equitable pricing. However, the actual help provided to the poorest is often minimal, except if they consume very little water.
"Solidarity" pricing has an obvious, preponderant social goal. Its advocates generally consider that the issue of income and its redistribution should not be a matter for the water pricing policy but the social policy.
Nevertheless, solidarity pricing consists in finding certain types of specific pricing mechanisms, but mainly subsidies or special measures for the poorest in order to correct the effects of standard social measures, which may be complementary with such pricing systems and make them more acceptable and satisfactory for everyone. It is either based on solidarity among users or is set up by municipal or state social services.
Concerning so-called social pricing – even though its goal is not as social as its name implies (the name is probably due to the fact that it comprises reduced prices for the first cubic metres consumed) – there are several types.
In each variant, the pricing is not "linear", i.e. it does not fully depend on the volume consumed, from the first to the last cubic metre (except for two-part tariffs), but is set by consumption brackets, each of which has a specific price.
This pricing per bracket may have different aspects. It may consist in either :
- Progressive linear pricing (the most frequent form), sometimes called "pricing by consumption bracket" where the price of the cubic metre is the same within a particular bracket but increases when the number of cubic metres consumed exceeds the bracket limit and falls into the following bracket(s). This type of pricing generally comprises three or four brackets, with prices increasing from the first bracket, sometimes called "social" or "low-cost" bracket to the last (e.g. in Brussels where a two-part tariff is applied, there are 4 brackets where prices range from €0.60 / m3 for up to 15 m3, to €3.06 beyond 60 m3/year, along with a standing charge of around €10) ; in Barcelona (also a two-part tariff) there are 3 brackets : €0.45 /m3 up to 72 m3, then €0.91/ m3 up to 144 m3 and €1.36 /m3 beyond that, along with a standing charge of €60 /year.
The Barcelona example gives a good illustration, even though there are worse ones, of the excessive character that a standing charge may have for small consumers : the stated tariff shows that the standing charge corresponds to 102 cubic metres at the progressive rate (the actual price paid for the 102 m3 would be double that amount, i.e. €120 due to the standing charge). In such a case, the standing charge would amount to 50% of the bill. This percentage is even higher for lower consumption.
For average standard consumption of 120 m3, the standing charge accounts for 44% of the bill, as the higher the consumption, the lower this percentage.
For this reason, a particular form of social pricing using a two-part tariff consists in integrating a certain reduction of the standing charge which may target specific categories. See factsheet B7.
- Pricing by progressive consumption brackets, sometimes called "pricing by sliding consumption brackets" or "superprogressive pricing"– a rarer expression as it is more dissuasive for big consumers or large families in which there are also several brackets but where users pay all of their water at the price of the bracket under which their total consumption falls.
Example : In Tunisia, there is a multi-bracket pricing system in which tariffs range from 0.145 dinars/m3 for consumptions under 80 m3/year, to 0.89 dinars/m3 beyond 600 m3/year, but users pay for all of their water at the tariff of their consumption bracket.
- Purely linear pricing, progressive linear pricing or pricing by progressive brackets but taking into account specific parameters (getting closer to solidarity pricing systems), leading to three other types of pricing, which are not so common, except in certain countries :
- Social pricing of a socio-economic nature, in which socio-economic parameters are introduced, for example concerning the composition of households, their housing or their income, like in Chile, Greece, Turkey and Spain.
- Reduced tariffs where a percentage of reduction or subsidy is automatically applied to certain user categories such as low-income persons, elderly or ill persons needing a lot of water for their treatments ; the amount or percentage may vary according to categories.
- Mixed pricing in which increases are applied to certain districts or wealthier population categories to finance the creation or development of standpipes or new facilities in poor districts, which is another form of cross-subsidy.
We would like to point out that, while social pricing presents advantages in numerous cases and incites users to pay more attention to the cost of water, it also has certain drawbacks which you should be aware of before making any decision.
For example, the most widespread pricing method (progressive linear pricing), where everyone, including the wealthiest families, benefit from the low-price bracket, can also have negative consequences for large families (or in certain districts or villages for those who need to get water from a neighbour who has a connection and who, because he/she uses more water, will have to pay a higher price for it).
All of these mechanisms and their respective advantages and drawbacks are described in detail in dedicated factsheets B3 to B8 which we prompt you to read.
- The terminology used by specialists varies significantly from one to another, including the terms "social pricing" and "solidarity pricing", making things more complicated. Also, beyond these terms, when you read a document, it is prudent to strive to find out exactly what type of pricing is being presented, what is its real aim and what the impacts are for the various categories of persons concerned, especially the most fragile, as in social pricing, like in all other systems, there are always a certain number of winners and losers.
- Choosing or setting up a pricing system suited to the corresponding population is not a simple matter and sometimes gives rise to unpleasant surprises. It is up to the municipal councils to make a decision, once the opinion of the population has been sought. It is therefore necessary to be prudent, and to gather all the data required to simulate the effect of the system beforehand.
- Concerning reported water prices, great attention is required to avoid major errors, especially when making comparisons. You must strive to find out exactly what is covered by the total price of a cubic metre. Does it include taxes or not, does it include the standing charge when there is one, is it the price of water on its own or with sanitation ? These parameters can totally change things.
- To be accepted and effective, the pricing must be as equitable as possible and the tariff increases generated for certain categories must be reasonable and not result in too great a drop in consumption or people turning to alternative resources (e.g. private wells), which could result in the need to increase tariffs in order to preserve the financial stability of the service.
- Social pricing is not the panacea it is sometimes made out to be. It is not a system which is very easy to set up or manage without certain additional costs. While it obviously has advantages, it also has drawbacks which vary according to categories and situations.
- Setting up such a pricing system is not necessarily an interesting proposition if it only results in minimal reductions in consumption or price smoothing for the majority of users.
Moreover, if the "social" goal sought is to help the most deprived, it is then better to opt for "solidarity" pricing or to allocate specific subsidies.
- Overly complicated systems with many consumption brackets or parameters are more difficult to manage and should therefore be avoided.
See the examples given for each type of social pricing system or related system (Factsheets B3 to B5)
- Académie de l’eau : publication of several very interesting, well-documented, illustrated studies by Mr Henri Smets, President of ADEDE :
- "De l’eau potable à un prix abordable", 254-page book explaining the concept of affordable water prices and comprising an extensive appendix showing numerous examples and graphs illustrating pricing practices in numerous countries.
- "La tarification progressive en France et dans le monde", 138-page book published in 2011, with a summary on pages 9 to 12, showing, through numerous examples and graphs referring to specific cases, the various ways of setting up an equitable pricing system to keep the price of one litre of water at the same level for the maximum number of people irrespective of the size of the household, but lower for the poor.
Available online at :
- H2O Magazine : 4-page article with an abstract by Mr Henri Smets (Académie de l’eau) entitled "Le tarif progressif équitable pour l’accès à l’eau potable" explaining how to choose an equitable system out of the various progressive pricing systems to guarantee that the average price per cubic meter is the same for all households on a particular network, in particular when a two-part tariff is used (fixed part + variable part).
- Plan Bleu (Zaragoza 2007) "La tarification progressive, outil de la gestion des ressources en eau. Exemple de la Tunisie". This 11-page document shows that Tunisia has widely used this type of progressive pricing per consumption bracket and sought to reduce consumption by excessively penalising big consumers who then turned to alternative resources. Available online at :
Other document : "3ème atelier régional de Saragosse sur l’eau et le développement durable en Méditerrannée", the 3rd Zaragoza regional workshop on water and sustainable development in the Mediterranean region where the issue of pricing is discussed, in particular on page 9. Available online at :
- UNDP : "Human Development Report 2006". This long and very interesting report contains a wealth of information and figures on water and sanitation problems across the world, and in particular on pricing and subsidy issues (pages 84 to 86 and 97 to 99). Available online at :
YouTube : 3-minute video "Libourne possède déjà une tarification progressive de l’eau" extracted from a TV news broadcast on FR3 in France and explaining the system set up in the city of Libourne in south-western France.
- YouTube : Video from Agir pour la planète : "Tarification progressive de l’eau" (Progressive pricing of water), interview of the Mayor of Sequestre, a small town of the Tarn region in the south of France (last page)