Machine Shop Electricity Costs in Ohio: 2026 Buying Guide
How much electricity do machine shops use?
EIA does not publish machine shops separately; the closest proxy, fabricated metals in MECS 2022, works out to about 24 kWh per square foot (our calculation), and machinery manufacturing to about 22.
| Illustrative site | Annual use | Est. peak demand | Est. capacity tag | Capacity cost at 2026/27 price | Value of 0.5¢/kWh |
|---|---|---|---|---|---|
| 8,000 ft² | 190,000 kWh | 62 kW | 47 kW | $5,596/yr (≈2.9¢/kWh) | $952/yr |
| 25,000 ft² | 595,000 kWh | 194 kW | 146 kW | $17,487/yr (≈2.9¢/kWh) | $2,975/yr |
| 60,000 ft² | 1.43 million kWh | 466 kW | 349 kW | $41,969/yr (≈2.9¢/kWh) | $7,140/yr |
How these numbers are built: annual use = 23.8 kWh/ft² (Proxy: EIA MECS 2022 NAICS 332 fabricated metal products (includes machine shops, NAICS 332710, which MECS does not break out). Derived: 42,069 million kWh / 1,767 million ft2). Peak demand assumes a 35% load factor; the capacity tag assumes 75% of that peak falls in the grid's summer peak hours. Capacity cost uses PJM's 2026/27 clearing price of $329.17/MW-day (about $120 per kW-year) before utility scaling factors. These are illustrations for sizing a decision — your own bills and interval data are what suppliers price.
Where the electricity goes
Machine drive (spindles, hydraulics, coolant pumps, compressors) dominates; in machinery manufacturing, facility HVAC is about 20% and lighting about 10% of electricity.
When the load peaks — and why that matters for price
CNC shops often run one or two shifts, with spindle and compressor loads that ramp at shift start and drop overnight — a low load factor with demand charges carrying a large share of cost.
In Ohio's PJM market, the capacity part of your generation cost is set by how much you use during the grid's few highest summer peak hours. With a 35% load factor and about 75% of the site peak landing in those hours, capacity alone works out to roughly 2.9¢ per kWh at the 2026/27 price of $329.17/MW-day — compared with about 0.3¢ at the 2024/25 price of $28.92. That jump, not the energy price, explains most of the 2025–2026 increase in Ohio business electricity bills.
How machine shops in Ohio buy electricity
Most machine shops are small-commercial accounts eligible for aggregation and standard fixed offers; multi-site or 24/7 shops may justify an RFP with interval data.
| If you… | Usually consider |
|---|---|
| need a fixed monthly budget | a 12–36 month fixed price with capacity included (fixed vs variable) |
| can move load away from summer peak hours | a product that passes capacity through at cost, so reducing your capacity tag lowers your bill |
| use more than 700,000 kWh a year at a site | an interval-data RFP, block-and-index structures, and HB 15's behind-the-meter options |
| are 700,000 kWh a year or less and never chose a supplier | first check whether you're already in a community aggregation program |
Ohio rules that affect this industry
- Ohio does not charge sales tax on electricity, but the kWh excise tax appears on every bill; make sure quotes are compared before tax.
- Supplier choice applies to customers of AEP Ohio, Duke Energy Ohio, AES Ohio, Ohio Edison, The Illuminating Company and Toledo Edison. Municipal-utility and electric-cooperative customers generally can't choose a supplier.
- Ohio does not charge sales tax on electricity; the per-kWh excise tax does appear on bills.
- As of 2026, Ohio's utilities do not offer general business efficiency rebates, so upgrades must pay back on bill savings (plus any federal tax treatment).
- Under HB 15 (effective August 14, 2025), suppliers must send two notices before a fixed-rate contract rolls to a variable rate — but only to accounts with demand of 25 kW or less. Larger sites should track their own expiration dates.
Ways machine shops cut electricity costs
- Turn off idle CNC machines and coolant pumps (or use auto power-down) between jobs.
- Fix compressed-air leaks; they run all night if the compressor is left on.
- Upgrade shop lighting to LED.
- Stagger warm-up cycles at shift start.
FAQ
What’s the biggest electric cost in a machine shop?
Usually motor loads — spindles, hydraulics and air compressors — plus the demand charge they create.
Should a machine shop join a city aggregation?
It can be convenient, but compare the aggregation price with commercial offers priced on your actual usage.
How can a shop cut its demand charge?
Stagger machine warm-ups and compressor starts at the beginning of the shift.
Sources
- https://www.eia.gov/consumption/manufacturing/data/2022/pdf/Table11_1.pdf
- https://www.eia.gov/consumption/manufacturing/data/2022/pdf/Table3_2.pdf
- https://www.eia.gov/consumption/manufacturing/data/2022/pdf/Table5_3.pdf
- PJM capacity auction results: https://www.pjm.com/markets-and-operations/rpm
Operating evidence for the next contract
For machine shops, an electricity quote should reflect the actual operation rather than a generic business category. Give the reviewer the opening schedule, continuously required systems, planned equipment changes and the responsible legal customer. A national building benchmark can frame a question, but cannot prove the usage or saving at your facility.
| Evidence to review | Decision it supports |
|---|---|
| Current operating schedule and required service levels | Identify whether the quoted load shape represents the next term, rather than last year’s business |
| Equipment and controls associated with machine shop operations | Separate a procurement question from an engineering or maintenance question |
| A committed expansion, closure or tenant/ownership change | Review usage tolerance, assignment and site add/delete rights before signing |
| Written supply inclusions and exclusions | Distinguish an energy-only offer from a product that includes capacity or other components |
Separate safe operating changes from price decisions
Use an appropriate facility specialist to validate technical changes. Stagger warm-up cycles at shift start. Treat that as a potential review item, not a guaranteed saving or permission to alter safety-critical settings. Medical, food, process and temperature requirements take precedence over an energy target.
Retain a base case without assumed rebates or unapproved tax benefits. If a project materially changes electricity use, ask the supplier how it affects the contract rather than silently carrying the old consumption profile forward. A lower supply price and reduced consumption are separate effects and should not be counted twice.
Keep the bid review practical
Compare at least the proposed start date, included components, monthly fees, renewal clause, exit rules and the treatment of expected load changes. Ask who is responsible for enrollment and what happens if a meter cannot switch on the expected date. An adviser should be able to explain why staying on the current arrangement may be appropriate.
The browser-only comparison tools keep inputs private. Start an Ohio electricity inquiry with the utility and question, without bills or account identifiers. For the common vocabulary behind the comparison, consult PUCO’s bill definitions.