How much does it cost to operate a data center in Mexico per month: the real breakdown with CFE

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 using 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 (Large Demand at Medium Voltage with Ordinary Tariffs) and where the money goes in each category.

The 6 monthly OPEX categories

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

1. Electric 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 ranges between 1.50 and 3.00 MXN depending on zone, time of day, and demand. For 2 MW at 60% load factor, 25,920 MWh/year are delivered; annual cost between 4.5 and 9.7 million MXN; monthly between USD $380k and $810k.
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 building CapEx between 20 to 30 years + structural maintenance. For rented colocation: direct monthly charge (typically USD $80 to $200 per kVA per month).
3. Cooling and mechanical systems: between 8% and 15% of OPEX. Electricity dedicated to chillers, chilled water, air handling; preventive + corrective maintenance of air handlers; consumables such as water and filters. Cooling typically 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 operation: 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 per year; 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 $4,000 per month per 1 Gbps; regional Tier 2 carrier (Megacable, Transtelco): USD $400 to $2,000; cross-connection to meet-me room and carriers on site: USD $200 to $1,500 per month. Dedicated Internet + managed DDoS protection: USD $1,500 to $8,000 per month.
6. Maintenance and consumables: between 5% and 12% of OPEX. Preventive maintenance of UPS, generators, chillers, BMS (quarterly frequency). 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: 2 MW Tier III

For a Tier III data center in Mexico 2026 with 2 MW contracted at CFE GDMTO, 60% load factor, PUE 1.6, 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 total energy. At 2.00 MXN/kWh = 2,764,000 MXN/month = USD $138,200/month (20 MXN/USD exchange rate).
2. Site and depreciation: for initial investment of USD $12 million in land + civil works + building, depreciation at 25 years = USD $40,000/month on 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; chiller, filter, and water maintenance = USD $25,000/month.
4. Operating staff 24/7: 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 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 spare parts = USD $1,500/month; training = USD $1,000/month. Total USD $6,667/month.

Total estimated OPEX for 2 MW Tier III: USD $138,200 (energy) + USD $53,000 (site) + USD $25,000 (cooling) + USD $33,930 (staff) + USD $14,000 (connectivity) + USD $6,667 (maintenance) = USD $270,797/month, equivalent to USD $1.6 million/year. Realistic range USD $250,000 to $320,000/month for this scale; ranges outside this indicate underestimated or optimistic 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 that goes out goes to the electricity bill.
2. Site + depreciation: USD $53,000/month = 20%. The amortized building investment shows up every month.
3. Staff 24/7: USD $33,930/month = 12%. Operator-hour is not easily outsourced in 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 19% (changes the CFE bill 19%). For 2 MW at 2 MXN/kWh, the saving is 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: in the GDMTO/Large Demand tariff with low power factor (< 0.95) there is a penalty. 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 carriers + 1 regional Tier 2, the savings can reach USD $5,000 to $7,000/month.
4. Outsource specialized staff: the first 2 in-house are facility manager and senior technician, but the rest of the team can be part of a facility management contract with a specialized company. Savings for Tier III between 15% and 25% of the staff line item.
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 Contacto: 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/