The Hidden Cost Killing Your Profit Margins: A Complete Guide to Calculating Labor Burden for HVAC, Plumbing, and Electrical Contractors

If you pay a journeyman $35 an hour and estimate your jobs based on that $35 number, you're losing money every time they clock in.

This isn't a worst-case scenario. It's reality for the majority of HVAC, plumbing, and electrical contractors who don't understand labor burden. It's the gap between what you pay your employees and what they actually cost your business.

The result? You bid a job expecting a 20% profit margin and end up with 5%. Or worse, a loss. Meanwhile, you're working harder than ever, your team is busy, but somehow the money isn't there at the end of the month.

In this guide, I'm going to show you exactly how to calculate labor burden step-by-step, so you never underbid a job again.

Prefer watching? I walk through this entire blog post and all the calculations step-by-step:

What Is Labor Burden?

Labor burden is the total cost of employing someone beyond their gross wages. It includes:

• Payroll taxes (FICA, FUTA, SUTA)

• Workers' compensation insurance

• Health insurance and benefits

• Tools, uniforms, and equipment allowances

In the trades, labor burden typically adds 40-50% on top of the base wage. Here's a real example:

You pay Joe the journeyman $35/hour. Between payroll taxes, workers' comp (7%), health insurance ($500/month), uniforms, and tools... Joe actually costs you approximately $51/hour.

That $16/hr difference is your labor burden. And if you're not accounting for it in your pricing, every job you complete is eroding your profit.

Why Labor Burden Matters More Than You Think

Understanding labor burden affects literally every business decision you make:

• Pricing: You can't set profitable rates without knowing your true costs

• Hiring: You can't evaluate if you can afford another employee

• Job profitability: You can't determine which jobs actually made money

• Growth planning: You can't scale if your unit economics are broken

• Cash flow: You can't understand why you're busy but broke

Most contractors know their revenue. They know what they pay their employees. But they have no idea what those employees actually cost. AND that's the difference between thriving businesses and struggling ones.

What Costs are Included in Labor Burden

These are the direct costs tied to employing a specific person:

Mandatory Payroll Taxes:

• FICA: 7.65% (6.2% Social Security + 1.45% Medicare)

• FUTA: 0.6% on the first $7,000 of wages

• SUTA: Varies by state, typically 2-5%

• NOTE: some states have additional payroll taxes like California's SDI or Washington's Paid Family Leave

Workers' Compensation Insurance:

This is a massive variable and often the single biggest component of labor burden in the trades. Rates vary dramatically by:

• Trade specialty (inside wire vs. outside wire electricians vs roofers can have different rates)

• State regulations

• Your EMR (Experience Modification Rate) which is largely your claims history

• NOTE: One bad safety year can spike your EMR and increase your workers' comp premium by 30% or more overnight.

Voluntary Benefits:

• Health, dental, vision insurance (employer-paid portion)

• Retirement contributions (401k matching)

• Life insurance, disability coverage

• Tool allowances and uniforms

• Company phone, vehicle allowances

• Continuing education, licensing, certifications

Watch me walk through this exact calculation in the video above, or download the free calculator and do it yourself as you read: Calculator Download Here

Step-by-Step: Calculating Labor Burden

Let's walk through a real calculation using "Journeyman Joe" as our example.

Scenario:

• Base wage: $35/hour

• Works 40 hours/week, 52 weeks/year

• Standard benefits package

Step 1: Calculate Annual Base Wages

$35/hour × 2,080 hours (40 × 52) = $72,800/year

This is where most contractors stop. "I pay him $72,800, so I'll charge $45-50/hour and make a profit." Wrong. We're just getting started.

Step 2: Calculate Mandatory Payroll Taxes

• FICA: $72,800 × 7.65% = $5,569

• FUTA: $7,000 × 0.6% = $42

• SUTA: $72,800 × 3.5% (example state rate) = $2,548

Total Payroll Taxes: $8,159

These are mandatory—no way around them.

Step 3: Calculate Insurance Costs

• Workers' Comp: $72,800 × 7% (electrical rate) = $5,096

Total Insurance: $5,096

Note: Your workers' comp rate is tied to your EMR. One serious injury can spike this by 30%+ the following year.

Step 4: Calculate Benefits

• Health Insurance: $500/month × 12 = $6,000

• Retirement Match: $72,800 × 3% = $2,184

• Other Benefits: Tools, uniforms, phone, training = $1,500

Total Benefits: $9,684

These aren't mandatory, but if you offer them, they're real costs you must recover in your pricing.

Step 5: Calculate TRUE Burden Hourly Wage:

Total Annual Cost:

• Base Wage: $72,800

• Payroll Taxes: $8,159

• Insurance: $5,096

• Benefits: $9,684

TOTAL: $95,739

TRUE Burden Hourly Wage: $95,739 ÷ 2,080 hours (52 weeks @ 40 hours) = $46.03/hour

The Result

• Base Wage: $35.00/hour

• TRUE Burden Hourly Wage: $46.03/hour

• Labor Burden Rate: 31.5% (a $11.03/hour burden)

If you were bidding at $45/hour thinking you had a $10 profit margin, you're actually losing $1.03 per hour.

Multiply that across a 40-hour job: -$41

Multiply that across 2,080 hours per year: -$2,142 per employee

Multiply that across 5 technicians: -$10,712 in annual profit

And you're sitting there wondering why you're not profitable.

Part 2: Non-Billable Time (The Silent Killer)

This is where most contractors lose the game.

You pay your technician for 2,080 hours per year (40 hours × 52 weeks). But you cannot bill a customer for all of those hours.

Here's what you can't bill for:

• Holidays: you can't bill for Christmas

• PTO/Sick days: can't bill when they're at home

• Training/safety meetings: necessary but not billable

• Drive/Shop/Other Meeting time between jobs: Stocking truck, organizing, administrative tasks

Every hour you pay for but can't bill directly increases the cost of your billable hours. This is the efficiency gap that destroys margins.

Step 5: Calculate Non-Billable Time

• Total Paid Hours: 2,080

• Less: Holidays (6 days): -48 hours

• Less: PTO/Sick (10 days): -80 hours

• Less: Training (3 days): - 24hours

• Less: Drive/Shop time (~5 hrs/week): -241 hours

True Billable Hours: 1,687

You're paying for 2,080 hours but can only sell 1,687. This 19% efficiency loss is critical.

Step 6: Calculate TRUE Hourly Cost

Total Annual Cost:

• Base Wage: $72,800

• Payroll Taxes: $8,159

• Insurance: $5,096

• Benefits: $9,684

• TOTAL: $95,739

TRUE Hourly Cost: $95,739 ÷ 1,687 billable hours = $56.75/hour

The Result

• Base Wage: $35.00/hour

• TRUE Cost: $56.75/hour (Put this value in your FSM for job level costing)

• Labor Burden Rate: 62% (a $21.75/hour burden)

If you were bidding at $50/hour thinking you had a $15 profit margin, you're actually losing $6.75 per hour.

Multiply that across a 40-hour job: -$270

Multiply that across 2,080 hours per year: -$14,040 per employee

Multiply that across 5 technicians: -$70,200 in annual profit

And you're sitting there wondering why you're not profitable.

But Wait—There's More: Overhead

Labor burden covers the cost of employing a specific person and is the But you also need to recover your overhead—the costs of actually running the business.

Labor Burden vs. Overhead

Labor Burden = costs tied to a specific employee

• If you fire Joe, his payroll taxes disappear

• His workers' comp premium goes away

• His health insurance ends

• These costs are directly tied to him

Overhead = costs that exist even with ZERO field technicians

• Office rent and utilities

• Office staff salaries (dispatcher, admin, bookkeeper)

• Owner's salary (when you're NOT in the field)

• Software subscriptions (ServiceTitan, QuickBooks, etc.)

• Marketing and advertising

• Company-owned vehicles

• General business insurance

• Legal and accounting fees

• Bank fees, merchant services

• Office equipment and supplies

The Golden Rule: Field technician costs go in labor burden. Everything else is overhead. Never double-count.

Calculating Your Customer Billing Rate

Let's add overhead to our example:

• Annual Overhead: $255,000

• Total Billable Hours (all techs combined): 8,435 hours

• Overhead Per Hour: $255,000 ÷ 8,435 = $30.23/hour

Now we build the fully-loaded rate:

• Joe's TRUE Burden Wage: $56.75

• Overhead per hour: $30.23/hour

Break-even cost: 56.75 + 30.23 = $86.98/hour

This is your break-even rate. You're not making a penny of profit at $95.93/hour.

Want a 20% profit margin?

Minimum Billing Rate = $86.98 ÷ (1 - 0.20) = $108.73/hour

The Reality Check

That $35/hour employee?

You need to charge at least $108.73/hour to cover all costs and achieve a 20% profit margin.

That's 3.1× his base wage.

If you're charging $75/hour, you're losing money.

If you're charging $90/hour, you're barely breaking even.

If you're charging $50/hour... well, you're essentially paying customers to let you work for them.

This is why so many contractors are "busy but broke."

Common Mistakes That Kill Margins

Mistake #1: Using a Flat Burden Rate for Everyone

Your office administrator and your master electrician have wildly different burden rates:

• Office admin: 25% burden (low risk, low workers' comp, desk job)

• Apprentice electrician: 60% burden (lower wage, same fixed costs, high percentage)

• Journeyman: 45% burden

• Roofer: 70% burden (high risk, extremely high workers' comp)

Using a one-size-fits-all 40% rate means you're overbidding safe work and underbidding dangerous work. Calculate burden for each position type.

Mistake #2: Forgetting to Update When Costs Change

Your labor burden isn't static:

• Workers' comp rates change annually based on your EMR

• Health insurance premiums increase

• State unemployment tax rates adjust

• You add new benefits

Recalculate at least annually. If you have a bad safety year or your insurance renews, recalculate immediately.

Mistake #3: Not Tracking Actual Billable Hours

You might assume your techs are 90% billable. Pull the actual data from your service software.

If they're really only 80% billable, that 10% gap completely changes your rates. Track it, measure it, manage it.

Mistake #4: Confusing Burden and Overhead

This is the most expensive mistake:

WRONG: Adding your office manager's salary to labor burden

RIGHT: Office manager is overhead

WRONG: Adding company truck insurance to each tech's burden

RIGHT: Vehicle costs are overhead (unless truck is dedicated to one specific employee)

If a cost exists even when the employee is gone, it's overhead, not burden.

Industry Benchmarks: Are You Normal?

According to the Bureau of Labor Statistics, benefits and mandatory costs add roughly 44% to the base wage for construction workers.

Union vs. non-union:

• Union burden rates: Typically 10-20 points higher (55-65%) due to pension contributions and negotiated welfare funds

• Non-union: 35-50% depending on benefits offered

If your burden rate is:

• Below 35%: You're either not offering competitive benefits, or you're missing costs in your calculation

• 35-50%: Normal range for most trades

• Above 50%: Either high-risk trade, generous benefits, or low utilization rate

What to Do Right Now

Here's your action plan:

1. Calculate Your TRUE Labor Cost

Download the calculator and calculate it for every field employee.

Calculator Download Here

2. Calculate Your Total Annual Overhead

Add up everything that's not tied to specific field employees:

• Rent, utilities

• Office staff

• Owner's non-billable time

• Software, marketing

• General insurance

• Professional fees

Be brutally honest. Don't forget "small" costs that add up.

3. Determine Your Overhead Per Hour

Total Annual Overhead ÷ Total Billable Hours (all employees combined)

This number gets added to every labor hour you sell.

4. Set Your Minimum Billing Rates

For each employee type:

Minimum Rate = (TRUE Labor Cost + Overhead/hour) ÷ (1 - Target Profit %)

This is your floor. Never go below it.

5. Update Your Estimating System Immediately

Don't wait until next quarter. Every job you bid using incorrect labor rates costs you money. Typically the burden hourly wage is what belongs inside your FSM.

Update your rates in:

• ServiceTitan

• Housecall Pro

• FieldEdge

• QuickBooks

• Whatever system you use

Then train your estimators on the new rates and WHY they changed.

State-Specific Considerations

Labor burden varies significantly by state due to different tax structures:

States with Additional Payroll Taxes:

• California: SDI (1.1%) + Employment Training Tax (0.1%)

• Rhode Island: Temporary Disability Insurance (1.3%)

• Nevada: Career Enhancement Program (0.05%)

• New York: Disability Benefits + Paid Family Leave (~0.5%)

• Washington: Paid Family Medical Leave (0.8%)

• Oregon: Paid Leave Oregon (~1.0%)

• New Jersey: Complex multi-part system (~2.5% additional)

• Massachusetts: Paid Family Medical Leave (0.88%)

Make sure you're accounting for YOUR state's specific requirements. The free calculator includes all 50 states but check your pay stubs to ensure nothing is missed.

Special Case: Owner-Operators

If you (the owner) work in the field, here's how to handle it:

Calculate your market-rate wage for the work you do:

• What would you pay someone else to do your job?

• Add yourself to the roster at that wage

Then reduce your Owner Salary in overhead by that amount:

Example:

• You pay yourself $100,000 total

• You work 50% in the field (as a tech)

• Add $50,000 to labor burden (as a field tech)

• Put $50,000 in overhead (as owner/manager)

This prevents double-counting while accurately capturing where your time goes.

The Bottom Line

You didn't get into the trades to be an accountant. You got in because you're great at HVAC, plumbing, or electrical work.

But you also deserve to be profitable. You deserve to know that every job you complete is actually making you money, not slowly bleeding your business dry.

Labor burden is the foundation of profitable pricing. Without it, you're guessing. And guessing in business leads to one place: broke.

The good news? You don't have to guess anymore.

Calculator Download Here

I've created a comprehensive Excel calculator that does all of this math for you. It handles:

• Multiple employee types with different burden rates

• All 50 states (including state-specific payroll taxes)

• Overhead allocation

• Final customer billing rates

• Traditional burden rate vs. TRUE hourly cost

Plug in your numbers and you'll know your TRUE costs in 10 minutes.

Need Help Implementing This?

If you want someone to review your numbers, clean up your books, and make sure you're pricing for profit, that's what we do at Accounting 4 Trades.

We work specifically with HVAC, plumbing, and electrical contractors because we understand how your business actually works. No generic advice, no cookie-cutter solutions.

Book a Free Consultation: https://meet.acc4t.com/discovery

No sales pitch. Just a real conversation about your numbers and how to fix what's broken.

Frequently Asked Questions

Q: Should I include my project manager's salary in labor burden?

A: Generally, no unless they're dedicated 100% to a single job. If your PM oversees multiple jobs, their cost is overhead and should be recovered through your overhead markup, not labor burden.

Q: How often should I update my labor burden calculation?

A: At minimum, annually. But also update whenever your workers' comp EMR changes, your health insurance renews, or you add/change benefits. A bad safety year can spike your burden rate overnight.

Q: Can I just use a flat 30% burden rate for everyone?

A: Only if you hate money. An office admin might have a 25% burden (low risk, low workers' comp). A roofer might have a 60% burden (high risk, extreme workers' comp). Using a flat rate means you'll overbid safe work and underbid risky work.

Q: What if my rates are way higher than my competitors?

A: Your competitors are probably calculating wrong too (or going out of business). Price on YOUR costs, not theirs. Profitable contractors set rates based on real numbers, not wishful thinking.

Q: Should overtime hours have a different burden rate?

A: Yes! When an employee works overtime (1.5× wages), payroll taxes and workers' comp apply to the inflated wage. But health insurance stays flat. Your overtime burden rate should actually be slightly lower on a percentage basis but much higher in dollar terms. Calculate it separately.