Monthly cost to operate a data center in Mexico: the real CFE breakdown

Enterprise clients evaluating building or operating an on-prem data center in Mexico typically underestimate monthly OPEX by 30% to 60%. The typical mistake is to calculate only the CFE electricity tariff and forget the rest. This article breaks down the real components of monthly OPEX for a Tier III on-prem data center in Mexico (1 to 5 MW contracted), with CFE GDMTO tariffs (Gran Demanda en Media Tensión con Tarifas Ordinarias) and where each peso goes in every category.

The 6 categories of monthly OPEX

For a Tier III data center with 2 MW contracted, the 6 dominant categories of monthly OPEX are:

1. Electrical power (CFE GDMTO): between 30% and 45% of total OPEX. GDMTO tariff in Mexico 2025-2026 for High Voltage and Medium Voltage industrial. Cost per kWh varies between 1.50 and 3.00 MXN depending on zone, schedule, and demand. For 2 MW at a 60% load factor, 25,920 MWh/year are delivered; annual cost between 4.5 and 9.7 million MXN; monthly between USD 380,000 and USD 810,000.
2. Site (physical space): between 5% and 15% of OPEX. Rent or depreciation of land/building + property tax + insurance (fire, earthquake, civil liability). For own on-prem site: depreciation of the building CapEx over 20 to 30 years + structural maintenance. For rented colocation: direct monthly charge (typically USD 80 to USD 200 per kVA monthly).
3. Cooling and mechanical systems: between 8% and 15% of OPEX. Electrical power dedicated to chillers, chilled water, air handling; preventive + corrective maintenance on air handlers; consumables such as water and filters. Cooling usually consumes between 25% and 45% of the site’s total energy (depends on PUE — Power Usage Effectiveness).
4. Operating staff (24/7): between 15% and 30% of OPEX. For a Tier III data center with 24/7 operations: 1 facility manager, 2 to 4 shift operators, 1 to 2 maintenance technicians, 1 NOC technician. In Mexico, salaries for these roles: facility manager USD 50k-90k annually; operators USD 18k-35k; technicians USD 25k-50k.
5. Connectivity and carriers: between 5% and 12% of OPEX. National Tier 1 link (Telmex/Axtel): USD 800 to USD 4,000 monthly per 1 Gbps; regional Tier 2 carrier (Megacable, Transtelco): USD 400 to USD 2,000; cross-connection to meet-me room and to carriers at the site: USD 200 to USD 1,500 monthly. Dedicated internet + managed DDoS protection: USD 1,500 to USD 8,000 monthly.
6. Maintenance and consumables: between 5% and 12% of OPEX. Preventive maintenance of UPS, generators, chillers, BMS (quarterly cadence). Consumables such as HEPA filters, R-454B refrigerant to replace every 5 to 8 years, critical spare parts. Continuous staff training. Annual DCIM/BMS licenses.

The concrete calculation: Tier III at 2 MW

For a Tier III data center in Mexico 2026 with 2 MW contracted under CFE GDMTO, 60% load factor, PUE 1.6, an 8-person team:

1. CFE GDMTO energy: 2 MW × 0.6 factor × 24 h × 30 days = 864 MWh/month of IT load; × 1.6 PUE = 1,382 MWh/month of total energy. At 2.00 MXN/kWh = 2,764,000 MXN/month = USD 138,200/month (exchange rate 20 MXN/USD).
2. Site and depreciation: for an initial investment of USD 12 million in land + construction + building, depreciation over 25 years = USD 40,000/month for depreciation alone; plus structural maintenance USD 8,000/month; plus insurance USD 5,000/month; total USD 53,000/month.
3. Cooling and mechanical: 25% of energy consumption (part of the 1.6 PUE) is already included above; maintenance of chillers, filters, and water = USD 25,000/month.
4. 24/7 operating staff: 1 facility manager (USD 6,000/month with benefits) + 3 shift operators (USD 3,200 each = USD 9,600) + 2 maintenance technicians (USD 3,500 each = USD 7,000) + 1 NOC (USD 3,500) = USD 26,100/month in payroll + 30% benefits = USD 33,930/month.
5. Connectivity: 2 Tier 1 carriers (1 Gbps each, diversified) = USD 6,000/month + cross-connection USD 1,500 + managed DDoS protection USD 4,000 + dedicated internet USD 2,500 = USD 14,000/month.
6. Corrective maintenance and consumables: UPS generator quarterly service = USD 12,000/year = USD 1,000/month; chiller annual service = USD 8,000/year = USD 667/month; BMS/DCIM licenses = USD 2,500/month; critical spares = USD 1,500/month; training = USD 1,000/month. Total USD 6,667/month.

Estimated total OPEX for 2 MW Tier III: 138,200 (energy) + 53,000 (site) + 25,000 (cooling) + 33,930 (staff) + 14,000 (connectivity) + 6,667 (maintenance) = USD 270,797/month, equivalent to USD 1.6 million/year. Realistic range USD 250,000 to USD 320,000/month at this scale; ranges outside of this indicate underestimated or over-optimized assumptions.

Where the money actually goes

For the 2 MW Tier III example, the real distribution:

1. CFE energy: USD 138,200/month = 51% of total OPEX. Half of every peso spent goes to the electricity bill.
2. Site + depreciation: USD 53,000/month = 20%. The amortized building investment shows up every month.
3. 24/7 staff: USD 33,930/month = 12%. Operator-hours cannot be easily outsourced at Tier III.
4. Cooling: USD 25,000/month = 9% (part of the energy is already included above in the PUE).
5. Connectivity: USD 14,000/month = 5%.
6. Maintenance + consumables: USD 6,667/month = 3%.

Where to optimize without sacrificing uptime

Five levers to reduce OPEX without compromising Tier III or Tier IV:

1. Improving PUE from 1.6 to 1.3 reduces total consumption by 19% (changes the CFE bill by 19%). For 2 MW at 2 MXN/kWh, the savings are USD 26,500/month, USD 318,000/year. Investment in free cooling, inverter chillers, and modular UPS can pay back in 18 to 36 months.
2. Optimize power factor and CFE penalties: under the GDMTO/Gran Demanda tariff, a low power factor (< 0.95) triggers penalties. Improving power factor with capacitor banks reduces the penalty between 5% and 12% of the bill.
3. Negotiate carriers: multi-year contracts with regional Tier 2 carriers can be 30% to 50% cheaper than monthly contracts. For 2 Tier 1 + 1 regional Tier 2 carriers, savings can reach USD 5,000 to USD 7,000/month.
4. Outsource specialized staff: the first 2 positions, facility manager and senior technician, are in-house, but the rest of the team can be part of a facility management contract with a specialized firm. Savings for Tier III between 15% and 25% of the staff line.
5. Free cooling: in zones with temperate climate (CDMX, GDL, MTY) free cooling can replace the chiller between 4 and 9 months per year. For 2 MW of IT load, the potential savings with free cooling are 15% to 25% of the total energy bill.

Sources

1. CFE (Comisión Federal de Electricidad): GDMTO and GMD tariffs applicable to data centers in Mexico — https://www.cfe.gob.mx/
2. Uptime Institute: data center certifications and PUE benchmarks by tier — https://www.uptimeinstitute.com/
3. ASHRAE: technical standards for mechanical cooling systems and PUE — https://www.ashrae.org/
4. 7×24 Contact: Mexican association for operational continuity and facility management — https://www.7x24contacto.com/solutions
5. EPRI (Electric Power Research Institute): studies on energy efficiency in data centers — https://www.epri.com/