How to Calculate Utility Costs by Socioeconomic Stratum in Colombia

When searching for housing in Colombia, one of the key factors for calculating the monthly budget is the property's socioeconomic stratum. The stratification system (regulated by Law 142 of 1994) divides homes into six levels (from 1 to 6) to apply subsidies or additional charges on domestic water, electricity and gas bills.

Many renters and investors mistakenly assume that living in stratum 1 or 2 means paying symbolic rates with no consumption limit, or that stratum 5 doubles the base cost. To avoid financial surprises, we review how rates legally work, the percentages authorized by the regulatory commissions, and the exact formula to calculate your bill.

What Socioeconomic Stratification Is and How It Affects Your Bill

In Colombia, socioeconomic stratification is a classification assigned to residential properties based on their physical characteristics and the urban surroundings where they are built. It is vital to clarify that the stratum is assigned to the property, not to the personal income of the resident.

The goal of the system is income redistribution through cross-subsidies: high strata and commercial users help finance the cost of basic services for low strata.

• Strata 1, 2 and 3 (Low-low, Low and Medium-low): They are entitled to receive State subsidies on utility rates, applicable only to basic or subsistence consumption.
• Stratum 4 (Medium): It is the reference or neutral level. It receives no state subsidy, but it also pays no solidarity surcharge. It pays exactly 100% of the cost of the service.
• Strata 5 and 6 (Medium-high and High): They receive no subsidies and pay an additional solidarity contribution on their bill to finance the Solidarity and Income Redistribution Funds (FSRI).

Comparison Table: Subsidy and Contribution Percentages by Stratum

The maximum subsidy and surcharge caps are set by the regulatory framework of the Energy and Gas Regulation Commission (CREG) and the Drinking Water and Basic Sanitation Regulation Commission (CRA), overseen by the Superintendency of Domiciliary Public Services (Superservicios).

Important note: For water and sewerage, the exact subsidy percentages are approved locally by the Municipal Councils within the legal caps of Law 1450 of 2011 (art. 125). Therefore, one city may apply 50% in stratum 1 while another reaches the 70% limit.

The Key Concept: Basic Consumption vs. Luxury Consumption

The most common mistake when calculating utility costs is thinking that the discount for strata 1, 2 and 3 applies to all of the household's monthly consumption. The law stipulates that subsidies only cover subsistence consumption. Every kWh of electricity or cubic meter (m³) of water consumed above that cap is billed at 100% of the standard Unit Cost (CU) with no discount.

Electricity Subsistence Consumption Limits

The CREG sets electricity limits according to the municipality's altitude above sea level:

• Cities above 1,000 meters above sea level (cold or temperate climate, such as Bogotá or Medellín): The subsistence cap is 130 kWh/month.
• Warm zones (below 1,000 meters above sea level): The subsistence cap rises to 173 kWh/month due to the necessary use of ventilation or air conditioning.

Water Basic Consumption Limits

For the aqueduct and sewerage service, the CRA sets basic consumption according to the municipality's average altitude (CRA Resolution 750 of 2016, now compiled in CRA Resolution 943 of 2021): 11 m³ per month per subscriber above 2,000 meters above sea level (such as Bogotá or Tunja), 13 m³ between 1,000 and 2,000 meters above sea level (such as Medellín or Pereira), and 16 m³ below 1,000 meters above sea level (such as Barranquilla, Cartagena or Bucaramanga).

Watch out for the water contribution: the 20% for strata 5 and 6 applies to energy. For aqueduct and sewerage, it is set by each municipal council and is usually higher; in cities such as Cali or Chía it is 50% for stratum 5 and 60% for stratum 6.

Step-by-Step Formula to Calculate Your Bill

To project your monthly bill or verify whether the provider's charge is correct, follow these steps:

1. Locate the Unit Cost (CU) from your provider

On the body of the bill you will find the value of the Unit Cost (CU) per kWh or m³. This value includes the costs of generation, transmission, distribution and commercialization of the service.

2. Apply the formula for your stratum

Suppose a hypothetical electricity Unit Cost of $800 per kWh in a cold-climate city (subsistence cap = 130 kWh) and a total consumption of 180 kWh in the month:

• Subsidized consumption (first 130 kWh): 130 kWh × $800 = $104,000. If you are in Stratum 2 (50% subsidy), you pay $52,000 for this block.
• Full-rate consumption (remaining 50 kWh): 50 kWh × $800 = $40,000 (no discount).
• Basic consumption value + excess: $52,000 + $40,000 = $92,000.
• Fixed charges and street lighting: Add the authorized fixed charges and municipal taxes to get the final settlement.

By contrast, if that same consumption of 180 kWh occurs in Stratum 5 or 6, the calculation would be: 180 kWh × $800 = $144,000 + 20% solidarity contribution ($28,800) = $172,800 in consumption, plus fixed charges.

Do the math with your own data: use the utility calculator by stratum from Colombia Move. You enter your stratum, your municipality's climate, your consumption and the unit cost from your bill, and it shows how much you pay for electricity and water compared with stratum 4.

If you manage properties or have a formal lease contract, it is advisable to manage electronic invoicing for rentals to break down administration payments and fixed fees transparently.

Practical Tips for Tenants and Owners

When choosing an area to live in or investing in real estate in Colombia, keep the following operational recommendations in mind:

• Review the previous tenant's consumption: Ask the owner for the last three months of bills. In strata 1, 2 and 3, a large household that comfortably exceeds the subsistence cap will pay rates very similar to those of stratum 4.
• Calculate the total cost of the home: A rental in stratum 5 or 6 may seem competitive, but the 20% surcharge on energy, water and gas will increase the monthly cost of upkeep.
• Consider total transaction costs: If you are planning to buy rather than rent, review the guide to costs of buying a used home to structure your initial budget.

According to active listings on Colombia Move (August 2026), there are 41 apartment listings and 14 house listings; it is worth requesting recent bills for those properties, because the property's stratum weighs as much as the rent.

Frequently asked questions

❓ Which stratum pays the real utility rate without subsidy or contribution?

Stratum 4 pays 100% of the Unit Cost. It receives no subsidy and no 20% contribution, according to CREG and CRA rules in force in 2026.

❓ Up to what percentage is electricity subsidized in strata 1 and 2?

Up to 60% in stratum 1 and 50% in stratum 2. The cap applies only to subsistence consumption, according to CREG in 2026.

❓ What happens if I consume more electricity than the subsistence cap in strata 1, 2 or 3?

The excess is charged at 100% of the Unit Cost. The 130 kWh (cold climate) or 173 kWh (warm climate) are the CREG cap in force in 2026.

❓ Why do strata 5 and 6 pay 20% more on the bill?

They pay an extra 20% solidarity contribution. It is set by Law 142 of 1994 to finance subsidies for strata 1 to 3 through the FSRI, in force in 2026.

❓ Can a property's stratum be changed or challenged before the city hall?

Yes, the owner or resident can file a claim with the municipal Planning office. The process reviews materials and surroundings, not personal income, according to the regulation in force in 2026.

❓ Where can I view or check housing offers by area and stratum in Colombia?

Compare residential properties by city and stratum in Colombia Move. Review recent property bills; the August 2026 listing helps estimate upkeep costs.