In 2026, drilling a water well can still be profitable, especially for rural properties, homes or businesses with high and consistent water consumption. However, profitability will depend on the drilling cost, the amount of water available and the annual savings achieved.

In the Barcelona metropolitan area, Aigües de Barcelona’s tariffs were updated for 2026, mainly due to the increase in the cost of water purchased from the wholesale supply network. In addition, tariffs are progressive, meaning that higher consumption results in a higher price per cubic metre.

Initial cost versus savings

The investment required to drill a well mainly depends on:

• The drilling depth.
• The type of ground.
• The accessibility of the site.
• The pipes and materials used.
• The water pump and electrical installation.

Maintenance, electricity and any necessary water treatment costs must also be added to this initial investment.

To calculate the profitability of a water well, the following formula can be used:

Payback period = initial investment ÷ net annual savings

Net annual savings are the difference between the water costs avoided and the operating costs of the well.

What factors affect profitability?

The main factors are:

• Water consumption: the higher and more regular it is, the greater the potential savings.
• Water price in the municipality: tariffs vary depending on the area and consumption band.
• Available flow rate: the well must provide enough water to cover the expected requirements.
• Depth: deeper drilling usually requires a higher investment and greater pumping energy consumption.
• Use of the water: a well used for occasional irrigation does not provide the same savings as one used for agricultural purposes.
• Maintenance: the pump, pipes and electrical system must be inspected periodically.

In which cases is a well usually more profitable?

A well is usually particularly worthwhile for:

• Agricultural and livestock farms.
• Properties requiring frequent irrigation.
• Homes with a garden or swimming pool.
• Residential communities with large green areas.
• Industrial facilities.
• Businesses with high water consumption.

By contrast, for a home with low water consumption, the payback period may be longer and should be assessed in greater detail.

Economic advantages of having a well

Having a private water source can provide several benefits:

• Lower water bills.
• Less dependence on future tariff increases.
• Water availability for irrigation and other uses.
• Greater control over consumption.
• Improved functionality and value of certain properties.

This does not mean that the water is free, as there are still costs associated with electricity, maintenance, testing and treatment when necessary.

Permits and legal considerations

Before drilling, it is essential to verify the administrative feasibility of the project. In Catalonia, groundwater abstractions of up to 7,000 m³ per year must be declared and may require prior authorisation in protected areas or locations close to watercourses. For higher volumes, a concession must be obtained.

It is also necessary to study the ground, calculate the required flow rate and select a suitable pump to avoid unnecessary electricity consumption.

Profitability of a well in Barcelona and Catalonia

The profitability of a water well in Barcelona and Catalonia will depend on the geological characteristics of each area, the depth of the aquifer and the intended use.

At Perforacions i Bombes Barcelona, we assess each project to evaluate the drilling, pumping system and water consumption requirements before starting the work.

Frequently asked questions

How long does it take for a well to pay for itself?

There is no single timeframe. It depends on the initial investment and the annual savings. Projects with high water consumption usually achieve payback sooner.

Does a well completely eliminate the water bill?

Not necessarily. It can reduce it considerably, but there will still be electricity, maintenance and treatment costs.

Is a well profitable for watering a garden?

It can be when the garden is large and requires frequent irrigation. For lower consumption levels, a preliminary calculation should be carried out.

Conclusion

In 2026, drilling a well remains a profitable investment for many projects, especially when water consumption is high and continuous.

The best way to determine this is to carry out a technical assessment of the depth, available flow rate, required installation and expected savings.