How to Price an HVAC Job — A Contractor's Guide to Estimates
Master HVAC job pricing with this comprehensive guide. Learn how to calculate material costs, labor rates, overhead, markup vs margin, and build a reliable price book.
Understanding Your True Costs
Before you can price any HVAC job, you need to know exactly what it costs you to do the work. Most contractors undercharge because they only account for materials and labor, forgetting about the overhead that quietly eats into every dollar they earn.
Every HVAC job has three cost categories. You need to account for all three before adding your profit margin.
Material Costs
Materials include the equipment itself (condensing unit, air handler, furnace), plus all the installation materials: refrigerant line sets, copper fittings, PVC for condensate drains, duct tape, mastic, electrical wire, breakers, disconnect boxes, concrete pads, and thermostats. Do not forget consumables like brazing rods, nitrogen, and vacuum pump oil.
Track your material costs for every job for at least six months. You will be surprised how much those small items add up. Most contractors find that miscellaneous materials add 8-12% on top of the major equipment cost.
Labor Costs
Labor is more than the hourly wage you pay your technicians. Calculate the fully burdened labor rate by adding:
- Base hourly wage
- Payroll taxes (FICA, FUTA, state unemployment) — typically 10-15% of wages
- Workers compensation insurance — varies by state, often 5-15% of wages
- Health insurance and benefits
- Paid time off (vacation, sick days, holidays)
- Training and certification costs
- Uniforms and tools
A technician earning $28 per hour often has a fully burdened rate of $42-48 per hour. If you are pricing based on the $28 figure, you are undercharging on every single job.
Overhead Costs
Overhead includes everything that keeps your business running but does not directly tie to a specific job:
- Rent or mortgage on your shop/warehouse
- Vehicle payments, fuel, and maintenance
- General liability and commercial auto insurance
- Office staff salaries
- Accounting, legal, and software costs
- Marketing and advertising
- Licensing and permit fees
- Phone and internet service
Add up your total annual overhead and divide by the number of billable hours your team works per year. For a company with $180,000 in annual overhead and 4,000 billable hours, your overhead rate is $45 per billable hour. This cost must be recovered in your pricing.
Markup vs Margin — Know the Difference
These two terms are often used interchangeably, but they mean very different things. Confusing them is one of the fastest ways to underprice your work.
- Markup is the percentage added to your cost to arrive at the selling price. If your cost is $1,000 and you apply a 50% markup, your price is $1,500.
- Margin is the percentage of the selling price that is profit. In the same example, your $500 profit on a $1,500 sale gives you a 33.3% margin — not 50%.
The formula to convert: Margin = Markup / (1 + Markup). A 50% markup equals a 33.3% margin. A 100% markup equals a 50% margin.
Pro Tip
Most successful HVAC contractors target a net profit margin of 8-12% after all expenses. To achieve that, you typically need a gross margin of 45-55% on installation work and 55-65% on service and repair work. If your margins are below these ranges, you are working harder than you need to for less money.
Pricing AC Installations
Air conditioning installations are typically the highest-ticket residential jobs. Pricing depends on system size, efficiency rating, complexity of the installation, and your local market.
Step-by-Step Pricing Process
- Perform a load calculation. Use Manual J to determine the correct system size. Never guess based on square footage alone. An oversized system costs more and performs worse.
- Select the equipment. Choose a condensing unit and evaporator coil (or air handler) that match. Check your distributor pricing and apply any available rebates or dealer incentives.
- Estimate labor hours. A straightforward like-for-like replacement typically takes a two-person crew 6-8 hours. Add time for ductwork modifications, attic work, electrical upgrades, or difficult access.
- List all materials. Line set, fittings, disconnect, whip, pad, thermostat wire, drain line, mastic, refrigerant top-off, and any sheet metal work.
- Calculate total cost. Equipment + materials + (labor hours x burdened rate) + overhead allocation + permit fees.
- Apply your markup. For most markets, a 45-55% gross margin on residential AC installs is competitive and profitable.
For a deeper dive into quoting AC installations specifically, see our guide on how to quote an AC installation job.
Pricing Furnace Replacements
Furnace replacements follow a similar process to AC installs, but there are a few additional factors to consider.
- Fuel type matters. Gas furnaces, oil furnaces, and electric furnaces all have different equipment costs, venting requirements, and installation complexity.
- Venting modifications. Upgrading from an 80% AFUE standard furnace to a 96% high-efficiency condensing furnace requires converting from metal B-vent to PVC venting. This adds 2-4 hours of labor and additional materials.
- Gas line sizing. Higher-BTU furnaces may require a larger gas supply line. Check before you price the job.
- Combustion air requirements. High-efficiency furnaces need dedicated combustion air. Factor in the cost of running PVC intake piping.
For specific pricing guidance on furnace jobs, check out our furnace replacement quoting guide.
Pro Tip
When quoting a furnace replacement, always inspect the existing ductwork. If the trunk line is undersized or the return air is inadequate, address it in the proposal. Fixing airflow problems during the furnace swap is far easier and cheaper than coming back later, and it is an easy upsell that improves the customer's comfort.
Service and Repair Pricing
Service and repair work requires a different pricing approach than installations. The challenge is that you often do not know the full scope of the repair until you are on-site and have diagnosed the problem.
Diagnostic Fee
Charge a diagnostic fee that covers your travel time and the first 30-60 minutes of troubleshooting. This fee should be competitive for your market — typically $79-$149. Many contractors waive the diagnostic fee if the customer approves the repair, which increases conversion rates.
Repair Pricing
For common repairs, build a flat-rate price list that includes the part, labor, and your overhead and profit. Here are examples of how to calculate a flat-rate repair price:
- Part cost: $85 (capacitor)
- Labor: 30 minutes at $45/hr burdened rate = $22.50
- Overhead allocation: $25
- Total cost: $132.50
- With 60% gross margin: $132.50 / 0.40 = $331 selling price
Having pre-calculated repair prices lets your technicians present pricing on the spot rather than calling the office. This speeds up the decision and increases your close rate.
Flat Rate vs Hourly Billing
This is one of the most debated topics in the HVAC industry. Both approaches have merits, but flat-rate pricing is increasingly the standard for residential work.
Hourly Billing
- Simple to calculate and explain
- Fair for jobs with unpredictable scope
- Can feel risky to homeowners who worry about the clock running
- Penalizes efficient technicians — the faster they work, the less you earn
- Common in commercial and new construction work
Flat-Rate Pricing
- Homeowners know the price before work begins — no surprises
- Rewards efficiency — faster techs earn you more per hour
- Easier for technicians to present in the field
- Requires a well-built price book to be accurate
- Preferred for residential service and repair work
Pro Tip
If you switch to flat-rate pricing, train your technicians to present the price and the value together. Instead of saying "The capacitor replacement is $331," say "For $331, I will replace the failed capacitor, test all electrical connections, and verify the system is running at peak efficiency. This repair comes with a 1-year parts and labor warranty."
Building Your Price Book
A price book is a comprehensive list of every service, repair, and installation your company offers, with pre-calculated prices. It is the foundation of consistent, profitable pricing.
- List every task your company performs. From changing a filter to installing a complete system. Group them into categories: diagnostics, repairs, maintenance, installations.
- Calculate the cost for each task. Include parts, labor time (at your burdened rate), and an overhead allocation.
- Apply your target margin. Be consistent. Use the same margin percentage across similar categories.
- Add complexity modifiers. A capacitor replacement on a ground-level unit costs less than one on a rooftop unit. Build in modifiers for attic access, crawl space work, after-hours calls, and multi-story buildings.
- Review and update quarterly. Equipment prices change, labor costs shift, and your overhead evolves. A stale price book will gradually erode your margins.
A well-maintained price book saves time on every job, ensures consistent pricing across your team, and prevents the guesswork that leads to undercharging.
Tools to Help You Price and Propose Accurately
Accurate pricing only matters if you can communicate it effectively to the homeowner. The best pricing in the world does nothing if it sits in a spreadsheet instead of a professional proposal on the customer's phone.
ProposalKit combines your price book with a professional proposal builder. Enter the job details, select equipment from your price book, and generate a branded proposal with good-better-best options in minutes. Your pricing stays consistent, your proposals look professional, and you close more jobs.
- Built-in price book with real-time cost tracking
- Automatic margin calculations — never underprice a job again
- Good-better-best option builder
- Professional proposals generated in minutes, not hours
- E-signature so customers can approve on their phone
Once you have your pricing nailed down, the next step is learning how to write an HVAC proposal that wins. Pair great pricing with a great proposal and you will see your close rate climb.
View ProposalKit pricing plans and start your free trial today.