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Large-Load Interconnection Cost

MW and market to study fees, security deposit, minimum-bill exposure and realistic energization year, from the Large-Load Cost Table.

Inputs

Needed to turn minimum-bill MW-years into dollars. Not in the public tariff table; read it from the rate schedule you would take service under.
Advanced
Minimum-bill exposure over the term–
Study fee–
Security or collateral–
Realistic energization–
Exit–
Terms as published
TermPublished value

Method and assumptions
  1. Every cell is read from the Large-Load Cost Table row for the market (15 markets, status as of 2026-08-21). Where the source publishes no number the cell says "not published"; nothing is estimated.
  2. Threshold: if your MW is below the tariff's large-load threshold the tool says so; the study fee, security and minimum bill then follow the standard tariff, which is outside this table.
  3. Minimum-bill exposure = sum over the contract term of the minimum billing demand each year, in MW-years. The billing demand is the published share of contract capacity (85% Dominion T&D, 80% Xcel and SRP, 75% Duke, AEP Ohio's 15,000 kW plus 85% above 25,000 kW), applied to the ramped contract capacity where a ramp is published (Dominion 20% per year for four years, AEP Ohio 50/65/80/90%). Dollars = MW-years x 1,000 x your demand charge x 12; energy and riders are extra.
  4. Security scales with MW only where the source states a per-MW figure (Dominion $1.5M/MW by tariff; ComEd about $250k/MW and CenterPoint about $64k/MW implied from posted totals; Texas $50k/MW security plus $50k/MW fee at 75 MW and above, proposed). AEP Ohio collateral is 50% of the term's minimum charges and is dollarized only once you enter a demand charge.
  5. Energization year is the table's realistic year for a 50 MW request, with the basis quoted (JLL 2026 time-to-power, utility statements, planning presentations). Larger requests land later.
Table status as of 2026-08-21.

Method

Every cell is read from the Large-Load Cost Table row for the market, compiled for What 50 MW costs in 15 markets with status as of 2026-08-21. Minimum-bill exposure is the sum over the contract term of the published minimum billing demand (85% of contract capacity for Dominion, 80% for Xcel and SRP, 75% for Duke, AEP Ohio’s 15,000 kW plus 85% above 25,000 kW), applied to the ramped contract capacity where a ramp is published, and dollarized at the demand charge you enter. Security scales with MW only where the source gives a per-MW figure; implied averages (ComEd, CenterPoint) are labelled implied. Cells the sources do not publish render as “not published”; nothing is estimated.

Every input is mirrored to the URL so a scenario can be shared as a link.

Default assumptions come from the Large-Load Cost Table. Pro subscribers can save inputs. Institutional seats get the underlying series.

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