Introduction
A load calculation doesn’t just tell you how many amps your home needs — it prices your project. The difference between a 100-amp and a 200-amp service can swing an upgrade by thousands of dollars, and every new circuit you add lands somewhere on an electrician’s invoice. The good news: once you know your calculated demand, you can budget the electrical work with surprising accuracy, because electricians price from the same handful of building blocks — panel size, circuit count, wire runs, and permits.
Start with the Electrical Load Calculator to get your demand number in VA and amps; then use the typical planning ranges below to turn that number into a budget. All costs are US planning ranges for licensed work — they vary substantially by region, access, and local code amendments, so treat them as budgeting brackets, not quotes.
How Your Load Number Drives Cost
Three cost levers follow directly from the calculation:
- Service size. A 200A panel, meter base, and service conductors cost more than 100A equivalents — and if the utility’s drop or the meter needs upgrading, that adds more.
- Circuit count. Each new circuit means a breaker, wire, labor, and often drywall repair. More calculated load usually means more circuits.
- Wire size. Larger loads need larger conductors, and copper gets expensive fast above 6 AWG. Long runs multiply the pain — which is also why the Voltage Drop Calculator matters on extended feeds.
A calculation that lands at 117A of demand (like our 2,000 ft² worked example) points at a 200A service — the pricing tier below reflects what that typically involves.
Service Upgrade and Panel Costs
| Job | Typical planning range (US) | Notes |
|---|---|---|
| Panel replacement, same amperage | $1,200–$2,500 | Swap a full or damaged 100A/200A panel, no service change |
| 100A → 200A service upgrade | $1,500–$4,000 | Most common upgrade; includes meter base, grounding, permits |
| 200A → 400A service | $3,000–$8,000+ | Often needs utility coordination, new mast or underground lateral |
| Subpanel installation (60–100A) | $800–$2,000 | Cheaper alternative when the main service has capacity |
| Whole-home surge protector | $200–$600 installed | Often added during panel work; cheap insurance |
The wide ranges reflect real variables: overhead vs. underground service, panel location, stucco or brick exterior walls, and whether the utility charges for a disconnect/reconnect. Dense metro areas trend 20–40% above these midpoints; rural areas with easy access trend below. Always get three local quotes — the DIY vs pro guide explains which parts of this work legally require a licensed electrician.
New Circuit Costs
| Circuit type | Typical planning range (US) | Notes |
|---|---|---|
| 120V general circuit (15–20A) | $150–$400 | Short, accessible runs at the low end |
| 240V appliance circuit (30–50A) | $300–$800 | Dryer, range, water heater; heavier wire |
| EV charger circuit (40–60A) | $500–$2,500 | Range depends heavily on panel-to-garage distance |
| Hot tub / spa circuit | $800–$2,000 | GFCI protection and disconnect required |
| Dedicated home-office / mini-split circuit | $200–$600 | Modest loads, straightforward runs |
Distance is the dominant variable: a 10-foot run through an unfinished basement might take an hour; a 60-foot run through finished walls with attic fishing can take a day. When budgeting, walk the wire path before you call for quotes.
Permits, Inspections, and Soft Costs
| Item | Typical planning range (US) |
|---|---|
| Electrical permit, minor work | $50–$200 |
| Electrical permit, service upgrade | $150–$500 |
| Utility disconnect / reconnect fee | $0–$300 |
| Drywall repair after wire fishing | $200–$800 |
| Load calculation / engineering review (if required) | $150–$500 |
Permit fees are set by the jurisdiction, not the electrician — your city’s building department publishes the schedule. Skipping the permit to save $150 can cost far more at resale or after an insurance claim; the code-compliance guide covers what triggers a permit.
Budgeting From Your VA Number: A Worked Example
Take the 2,000 ft² home from the complete guide: 28,125 VA of demand ≈ 117A → 200A service recommended. The project is a 100A → 200A upgrade plus two new 240V circuits (EV charger, workshop):
- Service upgrade 100A → 200A: $1,500–$4,000
- EV charger circuit (50A, 40 ft run): $800–$1,500
- Workshop 240V circuit (30A): $300–$800
- Permit and inspection: $150–$500
- Planning budget: $2,750–$6,800 before the charger hardware itself ($400–$700 for the unit)
Present this bracket to electricians when requesting quotes — a contractor who knows you’ve done the load math prices the job, not your uncertainty.
Ways to Keep the Cost Down
- Verify before upgrading. Run the full calculation first. Many “we need 200A” assumptions collapse once demand factors are applied — the common mistakes guide lists the errors that inflate demand.
- Consider a subpanel. If the service has capacity but the panel is full, a $800–$2,000 subpanel beats a $4,000 service upgrade.
- Use load management. EV chargers with automatic load management (pausing when the house peaks) can fit on a 100A service that a dumb charger would overload — often cheaper than the upgrade.
- Bundle the work. One permit, one inspection, one drywall repair visit for three circuits costs far less per circuit than three separate calls.
- Schedule off-peak. Electricians’ calendars — and sometimes their rates — ease in late winter and mid-summer.
Related Guides
- Complete Guide — the full load-calculation walkthrough behind these budgets.
- Estimating Guide — the inventory method for accurate inputs.
- DIY vs Pro — what you can do yourself and what requires a license.
- Pro Tips — future-proofing so you pay for the upgrade once.
- Load Calculation Checklist — from first measurement to final inspection.
Frequently Asked Questions
How much does it cost to upgrade from 100A to 200A?
Typically $1,500–$4,000 for licensed work including panel, meter base, grounding, and permits in the US. Underground services, difficult access, and high-cost metros push toward the top of the range.
Does a bigger calculated load always mean a bigger bill?
Not always. Demand factors often bring the calculated load under the existing service size, avoiding an upgrade entirely. And a subpanel or load-managed EV charger can solve capacity problems for a fraction of a service upgrade.
How much does an EV charger circuit cost to install?
Typically $500–$2,500 for the circuit alone, dominated by the distance from panel to charger. The charger hardware adds roughly $400–$700. A load calculation first tells you whether the service can take it.
Are permits really necessary for panel work?
In nearly all US jurisdictions, yes for service changes and new circuits. Permit fees ($50–$500) are minor next to the cost of an unpermitted installation discovered at sale or claim time.
Why do quotes vary so much between electricians?
Access, wire-path difficulty, panel brand availability, and how each contractor handles drywall repair differ job to job. Three itemized quotes against the same load calculation are the fix.
Get Your Number
Costs stop being scary once they’re tied to a number: calculate your demand, map it to a service size, and budget from the brackets above. Run the Electrical Load Calculator, note whether you land comfortably under your existing service or clearly above it, and take that answer — plus the worked budget example — into your quote conversations.
Disclaimer: planning estimates only. Cost ranges are typical US planning brackets that vary by region, access, and local code — get itemized local quotes before budgeting. Verify your load numbers with a licensed electrician and your local authority having jurisdiction (AHJ) before scheduling work. This guide is not engineering advice.
