HVAC Technician Payroll: Overtime, Spiffs and Commission Tracking Done Right

Your HVAC payroll is probably wrong. Not “off by a few cents” wrong — wrong in a way that creates wage-and-hour liability every single pay period. Most HVAC contractors between $1M and $10M are running payroll with the same process they used at $300K: a flat hourly rate, manual overtime at time-and-a-half, and spiffs tacked on as a separate line item. That approach violates federal overtime law the moment a technician earns a bonus in a week they work more than 40 hours.

For the full picture of HVAC financial management, see our complete guide to HVAC bookkeeping.

This guide covers the specific HVAC payroll challenges that trip up trade contractors: FLSA overtime requirements, spiff reallocation for overtime recalculation, commission tracking, fully loaded burden rates, workers’ comp classification, and prevailing wage compliance. If you’re running payroll for five or more technicians, at least one of these is costing you money right now.

FLSA Overtime Requirements for HVAC Technicians

The Fair Labor Standards Act requires overtime pay at 1.5× the regular rate for all hours worked beyond 40 in a workweek. The question every HVAC contractor asks: “Are my techs exempt?”

Almost certainly not.

The DOL defines three main white-collar exemptions: executive, administrative, and professional. HVAC technicians fail all three:

• Executive exemption requires managing the enterprise or a recognized department with authority to hire and fire. Field technicians don’t manage departments.
• Administrative exemption requires performing office or non-manual work directly related to management or business operations, exercising independent judgment on significant matters. Running a service call isn’t administrative — it’s the core production work of the business.
• Professional exemption requires advanced knowledge in a field of science or learning customarily acquired through prolonged specialized intellectual instruction. HVAC certification programs (EPA 608, NATE) are technical trade credentials, not the kind of academic professional training the DOL contemplates (think: doctors, lawyers, engineers with PE licenses).

The salary threshold ($58,656/year as of 2026) is also a factor, but even techs who earn above it still don’t meet the duties test for any exemption. The result: virtually all HVAC technicians are non-exempt and entitled to overtime.

If you’ve been treating senior techs or lead installers as exempt because they “make decisions in the field,” you have retroactive liability exposure. The statute of limitations is two years for unintentional violations and three years for willful violations.

HVAC Payroll and Spiff Overtime Recalculation

Here’s where most HVAC contractors get blindsided. The Air Conditioning Contractors of America (ACCA) and employment attorneys agree: spiffs and non-discretionary bonuses must be included in the regular rate of pay for overtime calculation.

This isn’t optional. Under FLSA §778.209, any bonus that is announced in advance to incentivize performance — a $50 spiff for selling a maintenance agreement, a $100 bonus for completing a retrofit under budget — is non-discretionary and must be factored into overtime.

The Math That Changes Everything

Here’s a concrete example of how spiff reallocation works:

Without spiff (incorrect method most contractors use):
– Tech earns $30/hr, works 50 hours
– Straight time: 40 hrs × $30 = $1,200
– Overtime: 10 hrs × $45 (1.5 × $30) = $450
– Spiff earned that week: $500
– Total paid: $2,150

With spiff properly allocated (correct method):
– Total straight-time earnings: $1,200 + $500 spiff = $1,700
– Recalculated regular rate: $1,700 ÷ 50 hours = $35/hr
– Recalculated OT premium: 0.5 × $35 = $17.50/hr
– OT premium owed: 10 hrs × $17.50 = $175
– Total paid: $1,700 + $175 = $1,875

Wait — the correct total is actually lower? Yes, in this example. But here’s the catch: many contractors pay the spiff on top of already-calculated overtime, which means they’re paying $2,150. The recalculation yields $1,875. However, if the spiff is smaller or the overtime hours are higher, the recalculation can go the other direction and increase what you owe.

The real risk isn’t overpaying by $275 on one paycheck. It’s that you’re not documenting the allocation method at all — which means a DOL audit or wage claim forces you to defend a calculation you never performed. The ACCA recommends allocating each spiff back to the workweek in which it was earned and recalculating the regular rate for that week.

Pro Tip: Configure your payroll system to treat spiffs as “non-discretionary bonus” pay codes, not flat additions. QuickBooks Payroll, Gusto, and ADP all support bonus pay types that automatically trigger overtime recalculation — but only if you set them up correctly from the start.

Commission Tracking: The Spreadsheet Compliance Risk

Many HVAC companies pay technicians a commission on maintenance agreement sales, upsells, or equipment referrals. The tracking usually lives in a spreadsheet maintained by the service manager — completely disconnected from payroll.

This creates three problems:

1. Overtime recalculation gaps. Commissions earned in an overtime week must be included in the regular rate, just like spiffs. If the commission data doesn’t reach payroll until weeks later, the overtime for those weeks was calculated incorrectly.
2. Audit trail failures. A DOL investigator or plaintiff’s attorney will ask for documentation connecting each commission payment to the pay period in which the work was performed. A separate spreadsheet with lump-sum monthly commission payments doesn’t satisfy that requirement.
3. Technician disputes. When a tech believes they sold an agreement that wasn’t credited, the spreadsheet becomes a he-said-she-said situation. Integrated tracking in your field service and accounting systems creates a single source of truth.

The fix: commissions should flow from your field service platform (ServiceTitan, Housecall Pro, Jobber) into payroll as a coded earning type, tagged to the week the sale was completed — not the week the customer’s first payment processes.

Fully Loaded Burden Rate: What an HVAC Technician Actually Costs

Every HVAC contractor knows what they pay their techs per hour. Almost none know what their techs cost per hour. The gap between the two is your burden rate — and it’s the number you need for accurate job costing, bid pricing, and profitability analysis.

Here’s the fully loaded burden rate breakdown for a technician earning $30/hr:

Burden Component	Cost per Hour	Notes
Base wage	$30.00	Hourly rate
FICA (Social Security + Medicare)	$2.30	7.65% employer match
Federal unemployment (FUTA)	$0.04	0.6% on first $7,000 (amortized)
State unemployment (SUTA)	$0.30	Varies by state; ~1% average
Workers’ comp insurance	$1.20	~$3.50–$5.00 per $100 payroll for HVAC (code 5183)
Health insurance	$3.50	Employer share of group plan, amortized hourly
401(k) match	$0.90	3% match on eligible wages
Tool allowance	$0.50	Annual tool stipend amortized across hours
PTO / paid holidays	$2.30	10 days PTO + 6 holidays = 128 hrs paid non-productive
Training & certification	$0.75	EPA 608, NATE renewals, manufacturer training
Fully loaded rate	$41.79	~39% burden on top of base wage

Your actual burden rate will land between $42 and $45/hr on a $30/hr base wage depending on your state’s workers’ comp rates and the richness of your benefits package. That means every hour a tech spends on a job costs you 40-50% more than their hourly wage.

This number matters because it’s what you plug into job cost estimates and bid sheets. If you’re bidding a 16-hour install using $30/hr labor, you’re underpricing the job by $190. Do that across 200 installs per year and you’ve given away $38,000 in margin.

Workers’ Comp Classification: NCCI Code 5183

HVAC technicians are classified under NCCI workers’ compensation code 5183 — “Plumbing, Heating, Air Conditioning, and Ventilation” — in most states. This is a moderate-risk classification with rates typically ranging from $3.00 to $5.00 per $100 of payroll, depending on your state and experience modification rate (EMR).

Key considerations:

• Misclassification penalties apply if you classify field technicians under a lower-risk office code. State auditors compare job descriptions to code definitions.
• Your EMR (experience mod) directly multiplies your base rate. An EMR of 1.2 means you pay 20% more than the base rate. Reducing workplace injuries is the fastest way to lower your payroll cost.
• Subcontractor certificates matter. If a sub doesn’t carry workers’ comp, your insurer will charge you their premium at audit. Collect certificates of insurance before any sub touches a job.

Prevailing Wage Compliance for Commercial and Government HVAC Jobs

If your company bids on commercial projects funded with federal or state money, prevailing wage laws apply. The Davis-Bacon Act (federal) and state “Little Davis-Bacon” laws require contractors to pay at least the prevailing wage rate for the locality — which is typically the union scale.

When it applies:

• Federal construction contracts over $2,000
• State and municipal projects (thresholds vary — some states have no minimum)
• Federally funded projects (schools, hospitals, infrastructure receiving federal grants)

What it requires:

• Paying the published prevailing wage rate for each craft classification (HVAC mechanic, pipefitter, sheet metal worker — each may have a different rate)
• Submitting certified payroll reports (WH-347 forms for federal work)
• Tracking hours by project separately from your standard jobs
• Paying fringe benefits at the published rate — either as cash or as bona fide benefit plan contributions

Most HVAC contractors who take their first government job underestimate the payroll reporting burden. The certified payroll requirement alone demands per-project hour tracking, which means your field service software and payroll system must be configured to isolate prevailing wage jobs from standard work.

Setting Up HVAC Payroll Tracking in QuickBooks

Whether you use QuickBooks Online Payroll, Gusto, or ADP, the setup principles are the same:

1. Create distinct earning codes for regular pay, overtime, spiffs/bonuses (non-discretionary), commissions, and prevailing wage differential.
2. Map spiffs and commissions as bonus pay types — not as reimbursements or flat additions — so the system includes them in the regular rate calculation.
3. Set up per-job time tracking so every hour is tagged to a specific job or project. This feeds both payroll accuracy and job costing visibility.
4. Create a prevailing wage pay rate as a separate rate in your payroll system, applied only to hours logged against government-funded projects.
5. Run a burden rate report monthly that calculates your actual fully loaded cost per tech, compared to your estimated rate. If they diverge by more than 5%, your bids are wrong.

The payroll configuration is a one-time investment that pays for itself the first time a tech earns a spiff during an overtime week — because the system handles the recalculation automatically instead of creating a compliance gap you’ll discover during an audit.

Pro Tip: Review your payroll earning codes quarterly. As you add new incentive programs (seasonal bonuses, efficiency spiffs, referral commissions), each one needs its own non-discretionary bonus code. A single “miscellaneous” earning code is a compliance time bomb.

How Payroll Errors Compound Into Margin Problems

HVAC payroll errors don’t just create legal risk — they distort every downstream financial metric. If your burden rate is wrong by $3/hr, your job cost estimates are wrong. If your job costs are wrong, your profit margins are fictional. And if your margins are fictional, you’re making pricing, hiring, and growth decisions based on numbers that don’t reflect reality.

The contractors who get this right treat payroll as a financial system, not an administrative task. They configure earning codes correctly, allocate spiffs to the right weeks, track commissions in real time, and know their fully loaded burden rate down to the penny.

---

Related Reading

• The Complete Guide to HVAC Bookkeeping — chart of accounts, job costing, seasonal cash flow, and KPIs
• HVAC Contractor Services — how Steph’s Books supports HVAC companies with industry-specific bookkeeping
• BLS: Heating, Air Conditioning, and Refrigeration Mechanics and Installers — wage data and occupation outlook

---

Is your HVAC payroll set up to handle spiffs, commissions, and overtime correctly? Steph’s Books provides trade-contractor-specific bookkeeping that catches the payroll errors most general bookkeepers miss. Get a free assessment →