Since version 1.3.0 the SCR AI Build Configurator covers all 50 states and the District of Columbia alongside the nine provinces. Selecting a state switches every figure to US dollars. The model then applies that state's indicative large-load rate, queue, construction cost factor and property tax level, plus two things that barely exist in the Canadian data: equipment sales tax where no exemption is open, and utility take-or-pay tariffs for large loads.
The binding constraints differ from Canada. South of the border, capacity is rarely rationed by a provincial crown utility. It is gated by utility large-load tariffs, by regional capacity markets, and by state tax policy that moved faster in 2026 than in any year before it. The National Conference of State Legislatures counts 38 states offering data centre incentives, and lawmakers in 28 of them introduced measures to scale those back or modify them this year.
What decides US sites right now
Virginia. The largest data centre market in the world, and the clearest example of tariff structure outweighing price. From 1 January 2027, Dominion Energy Virginia customers of 25 MW and above move to the GS-5 class. It carries 14-year contracts, minimum charges of 85% of contracted transmission and distribution demand and 60% of generation demand, plus collateral and exit fees. The equipment sales tax exemption was kept, but a data centre electricity consumption tax of US$0.011 per kWh has applied since 1 July 2026 (HB 30) on grid and self-generated power, capped at US$600 million a year and scheduled through 30 June 2028; the configurator adds it to the energy cost. The State Corporation Commission ordered on 31 July 2026 that new large loads pay directly for transmission built only to serve them, and Prince William County ended by-right data centre development on 22 September 2026. Northern Virginia energisation queues model at about 48 months.
PJM states. Thirteen states and DC sit inside PJM, where the 2028/2029 capacity auction cleared at the cap of roughly $325 per MW-day. That cost is already inside the indicative rates for Delaware, DC, Maryland, New Jersey, Ohio, Pennsylvania, Virginia and West Virginia, and for the PJM portions of Illinois, Indiana, Kentucky and Michigan.
Texas. ERCOT offers one of the lowest large-load rates in the model at about 7.1 cents, but the modelled queue is now about 42 months. Senate Bill 6 governs loads of 75 MW and above: interconnection study fees, disclosure of backup generation, and mandatory curtailment in grid emergencies. ERCOT is tracking about 474 GW of large-load requests, roughly 90% of them data centres. On 21 September 2026 the governor directed state agencies to halt data centre permits and approvals until a PUCT and ERCOT audit finishes, with no fixed end date, and he has said he will seek repeal of the sales tax exemption in the 2027 session; the exemption is still law. 4CP transmission charges can move a real invoice well off the average.
Federal and state review. FERC issued show-cause orders on large-load interconnection to all six RTOs and ISOs on 18 June 2026, and PJM filed a framework on 13 August 2026 under which new loads of 50 MW or more that do not bring their own capacity face curtailment ahead of other demand response from 1 June 2027. Maryland now reviews projects of 25 MW and above under a 23 September 2026 executive order, and Nevada's Executive Order 2026-005 ties abatements to paying the school support tax in full, covering grid costs and protecting water.
Ohio and take-or-pay. AEP Ohio's data centre tariff bills 85% of contracted capacity above 25 MW, and Ohio paused new data centre tax incentive approvals on 27 May 2026. Similar minimum-demand structures are modelled for Georgia, Indiana, Kansas, Missouri, New Jersey and Oregon. The practical lesson is that the power reservation should be sized to a realistic load ramp. An oversized reservation is paid for whether it is used or not.
The 2026 tax pullback. Arizona's exemption is closed to new applications from 1 July 2026 to 30 June 2029. Illinois paused its incentives for two years from 1 July 2026. Nebraska ended access to its data centre incentives by executive order in July. Massachusetts stopped accepting new exemption applications, New Jersey froze its remaining credits, and Oklahoma ends incentives for centres not operating by January 2027. Washington ended its exemptions for replacement servers and refurbished urban sites on 1 July 2026 (ESSB 6231), and Minnesota repealed its data centre sales tax exemption for purchases from 1 July 2026. Maine now excludes new data centres from its business equipment property tax exemption (LD 713), and New York paused environmental permits for new sites of 50 MW or more for a year from 14 July 2026. For a build that owns its accelerators, a closed exemption can add more to capital cost than any realistic difference in power price.
Cheapest and dearest. Louisiana and New Mexico lead on rate at about 6.5 cents, followed by Oklahoma, Texas, South Carolina and Tennessee. Hawaii's island grids sit at about 38 cents, with California and Alaska near 20.5. North Dakota has the shortest indicative queue at about 24 months. California, Hawaii and Virginia have the longest at about 48.
How the US figures are built. Rates start from U.S. Energy Information Administration state industrial averages, indexed to the April 2026 national industrial mean of 8.66 cents per kWh. Transmission-voltage loads usually settle below them. Tax status reflects state actions reported through August 2026. Some tariff floors and thresholds are planning assumptions where no directly comparable published figure exists. County abatements, negotiated local incentives, water rights and fibre routes are not modelled. Confirm tariff, tax and queue position with the utility and qualified counsel before committing capital.