How Much Does an Arc Flash Study Cost? What Drives the Price in 2026
Quick Answer: How Much Does an Arc Flash Study Cost?
There is no one-size price for an arc flash study. Cost is driven by your electrical system, not your square footage: mainly the number of buses that must be modeled (panels, switchboards, MCCs, and similar equipment), the condition of your one-line diagrams, voltage levels, and what is included in the scope. Engineering firms that publish pricing show studies starting in the low thousands of dollars for small buildings, commonly falling in the five-figure range for mid-size commercial and industrial facilities, and exceeding $100,000 for large campuses and multi-site programs (70Ez, VB Engineering).
Use those figures for budgeting context only. Two facilities of the same size can differ widely in price, and the only reliable number is one based on a scoping review of your system.
Key Takeaways
Bus count and system complexity drive cost far more than building size.
Accurate, current one-line diagrams are the biggest cost saver you control.
Labels, label installation, and travel are often priced separately. Always ask.
Five-year updates on a maintained model typically cost much less than a new study.
Compare scope, not just price. The lowest quote may exclude field data collection or leave you without a usable model.
Typical Budgeting Ranges (For Context, Not Quotes)
Published ranges vary by firm and by how each defines a "small" or "large" facility. Taken together, they suggest these broad tiers (70Ez, VB Engineering, Leaf Electrical Safety):
Small commercial buildings with a modest number of panels: often in the low-to-mid thousands of dollars.
Mid-size commercial or light industrial facilities: commonly in the five-figure range.
Large industrial plants with hundreds of buses and medium-voltage equipment: higher five figures and up.
Hospitals, campuses, and multi-building sites: can exceed $100,000.
Some firms also publish per-bus rates, generally in the low hundreds of dollars per low-voltage bus, with higher rates for medium- and high-voltage equipment and minimum project fees (VB Engineering). Per-bus pricing is useful for comparing quotes only when each quote counts buses the same way and includes the same scope.
Why an Accurate Price Requires Scoping
A quote given without understanding your system is a guess. The same 100,000-square-foot building could be a warehouse with a single service and a handful of panels, or a manufacturing plant with medium-voltage switchgear, multiple transformers, generators, and dozens of MCC buckets. The engineering work, field time, and price are very different.
A short scoping conversation, and sometimes a walkthrough, lets a provider confirm the bus count, check what documentation exists, and identify anything that adds time, such as restricted access or missing nameplate data. That is what turns a budgeting range into a reliable number.
What to Have Ready for an Accurate Quote
You do not need everything on this list, but the more you can share, the tighter and more accurate the quote:
Existing one-line diagrams, and how recently they were updated.
Any prior arc flash or short-circuit study, and the electronic model file if you have it.
The number of utility services, transformers, and main switchboards.
A rough count of panels, MCCs, disconnects, and other equipment to be labeled.
Voltage levels on site (low voltage only, or medium voltage as well).
Generators, transfer switches, UPS systems, solar, or battery storage.
Access restrictions, such as after-hours work, escorts, or healthcare and cleanroom areas.
The number of buildings or sites you want included.
What Drives Arc Flash Study Cost?
Number of Buses
Every bus requires data collection, modeling, short-circuit and incident energy calculations, and a label. Bus count is the primary driver of cost (70Ez).
Quality of Existing Documentation
Accurate, current one-line diagrams save money. Without them, engineers must trace the system in the field. Missing or outdated one-lines are one of the most common reasons field time, and price, goes up (70Ez, VB Engineering).
Voltage and System Complexity
Medium- and high-voltage equipment, multiple utility services, generators, transfer switches, solar, and battery storage each add modeling scenarios and cost.
Access and Scheduling
Night or weekend work, escorted access, cleanroom or healthcare restrictions, and equipment that must be opened to read nameplates all increase field labor.
Travel and Multi-Site Programs
Travel is often billed separately (70Ez). Multi-site portfolios can lower per-site cost when sites are bundled and standardized.
Scope Add-Ons
Coordination studies, equipment evaluation, mitigation recommendations, label installation, floor marking, and training all add cost but may be worth bundling.
What a Complete Arc Flash Study Should Include
A credible study should include:
Field data collection of equipment, conductors, protective devices, and settings.
An updated one-line diagram.
A short-circuit study and protective device coordination review.
Incident energy (arc flash) calculations at each bus, typically to IEEE 1584.
Arc flash labels that meet NFPA 70E 130.5(H): nominal voltage, arc flash boundary, and either incident energy with working distance or the PPE category, but not both (Eaton).
A written report with findings, high-hazard locations, and mitigation recommendations.
The electronic model file, so future updates do not start from scratch.
If a quote leaves out field data collection, labels, or the model file, it is not directly comparable to one that includes them.
Hidden Costs to Watch For
Label printing and installation: Labels may be excluded from the base price (70Ez).
Utility data requests: Available fault current from the utility is required. Delays can push schedules.
Re-mobilization: If equipment cannot be accessed on the first visit, a second trip may be billed.
Mitigation work: Studies often identify locations with very high incident energy. Fixing them through settings changes, maintenance switches, or equipment upgrades is a separate cost.
Model ownership: Some providers keep the model file, which can make future updates more expensive with a different vendor.
New Study vs. 5-Year Update
NFPA 70E requires the arc flash risk assessment to be reviewed at intervals not to exceed five years, and updated when a major modification or renovation takes place (Leidos). NFPA 70B also calls for system studies to be reviewed on a similar cycle.
Updates are usually much less expensive than the original study when the model has been maintained. A reassessment built on an existing, accurate model is typically a fraction of the cost of starting over (VB Engineering). If the original model is lost, outdated, or in a format your new provider cannot use, expect pricing closer to a new study.
For more on timing, read why arc flash studies should be updated every five years.
How to Lower Arc Flash Study Cost Without Cutting Corners
Gather existing one-line diagrams, prior studies, utility information, and equipment lists before requesting quotes.
Request the electronic model file and keep it with your maintenance records.
Bundle the study with infrared thermography or other maintenance visits to reduce mobilization costs.
Schedule data collection when equipment access is easiest.
For portfolios, standardize scope and bundle sites.
Track system changes between studies so updates are faster.
The Cost of Not Doing an Arc Flash Study
Without a current study, workers cannot reliably select PPE or know the arc flash boundary. OSHA's maximum penalties for 2026 are $16,550 per serious violation and $165,514 per willful or repeated violation (OSHA). Those figures do not include the far larger costs of an injury, equipment damage, downtime, or litigation. Insurers and clients increasingly ask for current studies as part of risk reviews.
How to Compare Arc Flash Study Quotes
Ask every provider the same questions:
How many buses are included, and how was the count determined?
Is field data collection included?
Are labels included, and who installs them?
Which standard is used for incident energy calculations?
Is a coordination review included?
Will I receive the electronic model file?
Is travel included?
What is the timeline from field work to final report?
For a deeper checklist, see our guide to getting quotes for arc flash studies.
Frequently Asked Questions
How much does an arc flash study cost?
It depends mainly on how many buses (panels, switchboards, MCCs, and similar equipment) need to be modeled, the condition of your documentation, and the scope. Engineering firms' published ranges start in the low thousands of dollars for small buildings and can exceed $100,000 for large campuses. An accurate price requires a scoping review of your system.
How much does an arc flash study cost per bus?
Some engineering firms publish per-bus rates, generally in the low hundreds of dollars per bus, with higher rates for medium- and high-voltage equipment and minimum project fees. Rates vary by firm, region, and what each bus price includes, so compare scope as well as price.
Why can't I get an exact price without a site review?
Two buildings of the same size can have very different electrical systems. Bus count, voltage levels, generators and transfer switches, the accuracy of existing one-line diagrams, and access restrictions all change the work involved. A short scoping conversation, and sometimes a walkthrough, is what makes a quote reliable.
How long does an arc flash study take?
Small facilities can often be completed in a few weeks from field work to final report. Large or complex facilities can take one to three months, depending on documentation, access, and utility data.
How often does an arc flash study need to be updated?
NFPA 70E requires the arc flash risk assessment to be reviewed at least every five years, and updated after major modifications or renovations that affect the electrical system.
Are arc flash labels included in the cost?
Not always. Some providers include labels and installation, while others price printing, installation, or both separately. Confirm this in writing before comparing quotes.
Related reading: NFPA 70B 2026: What Changed and What to Update
About the Author
Stephen Fike is the Principal of Assured NDT and Risk Assured, where he leads a team specializing in risk engineering, fire protection, and non-destructive testing for complex facilities across hospitality, healthcare, manufacturing, and real estate. He has more than a decade of experience at firms including PwC, Marsh, Willis Towers Watson, USI, and AIG, and has evaluated properties exceeding $1 billion in value. Stephen holds a degree in Civil and Environmental Engineering from Penn State University.
Get a Scoped Arc Flash Study Quote
Assured NDT helps facility owners plan arc flash studies, infrared thermography, and NFPA 70B electrical maintenance programs together, so data collection and site visits do more work. Learn what an arc flash study is and why your facility needs one, see the arc flash study process step by step, review arc flash study requirements for Florida businesses, or contact Assured NDT for a scoped quote.
Sources
Ranges mentioned in this article summarize pricing published by third-party engineering firms and are for general budgeting context only. They are not Assured NDT pricing, an estimate, or a quote. Every study is priced based on the specific facility and scope.
