Electrical Cost Estimating: NECA Labor Units, Unit Pricing, and Bid Math

Pricing an electrical bid is a blend of standardized labor units and hard-earned judgment. This guide explains electrical cost per square foot, current labor rates, NECA labor units, unit pricing, markup, and the full bid math — in plain language for new estimators and senior bidders alike.

Pricing Basics

Electrical cost estimating always breaks into four buckets: material, labor, equipment/indirects, and markup. The order you build them matters. Labor is almost always the biggest bucket and the biggest risk, so most electrical estimators build labor first, then layer material on top.

The simple equation

Bid price = (Material × M markup) + (Labor hours × Loaded rate × L markup) + Equipment/Other + Overhead + Profit.

Every professional electrical bid you have ever seen follows that structure. The numbers change; the structure does not.

Cost Per Square Foot

When a GC or owner asks "what does electrical run per square foot?" they are looking for a rough budget. Here are realistic 2026 benchmarks:

• Warehouse / core-and-shell — $4 – $7 per sq ft.
• Commercial tenant improvement (TI) — $10 – $18 per sq ft.
• Office, retail, restaurant — $12 – $22 per sq ft.
• Healthcare (clinic) — $25 – $45 per sq ft.
• Hospital, surgery, labs — $40 – $90 per sq ft.
• Data center — $80 – $250 per sq ft.
• Residential, single-family — $7 – $14 per sq ft of conditioned area.
• Multifamily — $5 – $10 per sq ft.

NECA Labor Units

NECA labor units are the standardized time it takes to install each electrical item under normal conditions. They come from the NECA Manual of Labor Units, updated periodically and widely accepted by the industry.

Common NECA units

• Duplex receptacle (new work) — 0.35 hrs
• GFCI receptacle — 0.45 hrs
• Single pole switch — 0.30 hrs
• 3-way switch — 0.40 hrs
• 2x4 recessed lay-in light (100 lbs or less) — 0.75 hrs
• 1/2 in. EMT — 4.5 hrs per 100 LF
• 3/4 in. EMT — 5.0 hrs per 100 LF
• 1 in. EMT — 6.5 hrs per 100 LF
• #12 THHN wire — 2.5 hrs per 1,000 LF
• #4 THHN — 5.5 hrs per 1,000 LF
• 42-circuit panel install (new) — 10-14 hrs
• 150 kVA dry-type transformer — 14-20 hrs

Adjustment factors

NECA publishes "normal conditions" units. You adjust them for your project:

• New construction, accessible — 0.90 – 1.00
• Standard commercial TI — 1.00 – 1.15
• Healthcare / occupied — 1.20 – 1.45
• Ceiling > 15 ft — 1.15 – 1.35
• Night work — 1.20 – 1.40
• Small crews (< 4 people) — 0.95
• Large crews (> 15) — 1.05 – 1.15 (less efficient per worker).

Labor Rates

2026 hourly rates

• Union journeyman wireman base: $55 – $85/hr.
• Union apprentice (5-year scale): $22 – $68/hr.
• Non-union electrician: $32 – $60/hr.
• Burden (taxes, insurance, benefits): 35 – 60 percent.
• Fully loaded union rate: $78 – $135/hr.
• Fully loaded non-union rate: $45 – $88/hr.
• Foreman premium: +$4 – $8/hr.
• General foreman: +$7 – $12/hr.

Crew mix matters

A typical commercial crew is 1 foreman + 2-3 journeymen + 1-2 apprentices. Average loaded rate depends on the mix. A blended rate of $85-$105/hr is common on union commercial in 2026.

Material Pricing

Devices

• 20A duplex receptacle (commercial spec grade) — $3 – $6 each.
• GFCI duplex — $18 – $30.
• Single pole switch — $2 – $5.
• 0-10V dimmer switch — $35 – $75.
• Device plate (single) — $1 – $4.
• 4 sq in. box — $2 – $5.

Conduit and fittings

• 1/2 in. EMT, 10 ft — $6 – $10.
• 3/4 in. EMT, 10 ft — $9 – $14.
• 1 in. EMT, 10 ft — $14 – $22.
• Rigid 1 in., 10 ft — $45 – $65.
• PVC Sch 40, 1 in., 10 ft — $8 – $12.
• EMT couplings, straps, connectors — $0.50 – $2 each.

Wire

Wire is priced per 1,000 ft and fluctuates daily with copper. April 2026 benchmarks:

• #12 THHN CU — $150 – $240/Mft.
• #10 THHN CU — $240 – $380/Mft.
• #4 THHN CU — $900 – $1,400/Mft.
• #4/0 THHN CU — $4,000 – $6,500/Mft.
• 12/2 MC Cable — $0.90 – $1.60/ft.

Gear

• 42-ckt 225A panel — $800 – $1,800.
• 400A MLO switchboard — $5,500 – $12,000.
• 75 kVA dry-type transformer — $3,500 – $6,500.
• 200A ATS — $6,000 – $14,000.
• 1,200A main switchgear — $28,000 – $65,000.

Unit Pricing

Electrical unit pricing bundles material + labor + markup into a single price per item. Estimators keep a unit price book for fast conceptual budgets and change orders.

Typical installed unit prices (2026, commercial TI)

• Duplex receptacle on home run — $95 – $165.
• GFCI receptacle — $125 – $220.
• Standard single pole switch — $75 – $120.
• 2x4 LED lay-in fixture, installed — $275 – $450.
• LED 2x2 recessed — $225 – $375.
• Exit sign with emergency battery — $225 – $400.
• CAT6 data drop (125 ft) — $155 – $260.
• Smoke detector (addressable) — $165 – $275.

Limits of unit pricing

Unit prices work for budget and change orders. They do not replace a detailed bid. Differences in conduit routing, ceiling height, and panel distance easily move unit prices 20-40 percent up or down.

Markup and Overhead

Material markup

Most electrical subs mark material up 10-18 percent to cover handling, warehousing, storage risk, and loss. Long-lead gear (switchgear, transformers) sometimes carries a lower markup because the dollars are big.

Labor markup

Labor markup is usually 15-25 percent above the loaded rate. It covers unforeseen productivity loss, weather, small tool loss, and the risk that the estimate might be off.

Overhead and profit

• Overhead: 8 – 15 percent of direct cost.
• Profit: 6 – 12 percent on top.
• Public work and hard-bid commercial often squeeze combined OH+P to 15-18 percent.
• Negotiated and design-build can run 20-30 percent combined.

Stacking the math

Never add markups — multiply them. Direct cost $200,000 at 12 percent OH and 8 percent profit:

$200,000 × 1.12 × 1.08 = $241,920, not $200,000 × 1.20 = $240,000.

Bid Risks

Gear lead times

Switchgear, transformers, and ATS can run 30-60 weeks. If the bid schedule does not match real lead times, you either miss install dates or pay rush fees. Always confirm lead time at bid.

Scope gaps

The classics: fire alarm (by whom?), low-voltage, AV, access control, temporary power, utility coordination, trenching, concrete encasement of duct bank. Every gray area is a fight waiting to happen. Put scope inclusions and exclusions in writing.

Material escalation

Copper, aluminum, steel, and electronics have all moved 20+ percent in a single year multiple times since 2020. Use escalation clauses or short quote validity on long-lead projects.

AI Pricing Tools

Modern electrical estimating software like PILRS pairs AI takeoff with live pricing. The platform reads device legends, counts symbols, measures conduit, applies NECA labor units, and multiplies by your loaded labor rate — all in minutes.

The estimator still reviews the output, adjusts factors, verifies scope, and makes the bid-or-no-bid call. The difference is you spend your time on the judgment calls instead of the counting.