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Independent Cost Data

HVAC bid and true cost calculators.

Independent FatBook v3 cost indexVerified permit/source data where availableReviewed by Leonard "Chuck" Thompson
2026-08-19 Calculator Baseline

Start with the 2026-08-19 national HVAC benchmark of $9,987, then choose your metro and service to compare a contractor quote against local range, lowest realistic price, and margin data.

Updated Aug 2026. Sources: BLS OEWS, FRED PPI, Craftsman labor-hour references, city permit data where available, and FatBook v3 cost-index methodology.

$9,987
Average
$9,296 to $11,195
Typical Range
$9,296
Lowest realistic price
18.8%
Margin
How this number is calculated

TheFatBook models HVAC from Craftsman labor hours, BLS regional wages, burden, PPI-adjusted materials, permit data where available, and contractor overhead benchmarks. Cost index version: 2026-08-19. Updated Aug 2026.

Sources: BLS, ACCA, Craftsman, FRED
Reference URLs: BLS OEWS · FRED PPI
Reviewed by: Leonard "Chuck" Thompson
Read methodology →
Estimate Scope

What the HVAC benchmark includes.

Included in the benchmark
  • Central Air Conditioning Installation as the headline cost-index scope
  • labor-hour assumptions, regional wage inputs, materials, overhead, and permit data where available
  • low, average, high, lowest realistic price, margin, and savings benchmarks from the FatBook cost index
Not included automatically
  • hidden damage, change orders, emergency service premiums, or unusual site access conditions
  • contractor financing approval, warranties, provider recommendations, or guaranteed final quotes
  • permit rulings for a specific address unless the city permit panel lists verified local data
Scope methodology →
Bid Fairness Checker

Is your HVAC bid fair?

Cost index by David Olson · reviewed by Leonard "Chuck" Thompson · 2026-08-19

Size the system honestly first. The rest of the bid follows the tonnage.

Want a shareable link? Use the standalone Bid Fairness Checker.

$
Type the number off the estimate, or drag the bar. The gauge below shows where it lands.
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Analyzed estimates are stored anonymized (names, addresses, phone numbers, and emails stripped) to improve the benchmark. No account, no tracking.
National Average
Within the fair range.
Fair range
Fair range$9,296 to $11,195
Cost to deliver$8,109
Typical market bid$9,987
Your bid$9,987
Implied margin19%
Fair range. Break-even sits at the red line: the cost of delivering the job, not a price anyone should demand. The green band above it is fair territory: most solid bids land at a 15 to 22 percent margin on the bid, roughly 18 to 28 percent over the cost to deliver, leaner or richer by trade and market. That band is earned money. No one works for free, and if the job were easy you would not be hiring it out.
Embed These Tools

Put these on your site.

Free and always current, no API key needed. Each widget credits TheFatBook with a link back. Copy the snippet for any tool below.

HVAC Bid Fairness Checker
<iframe src="https://thefatbook.com/hvac/embed/bid-checker/" title="HVAC Bid Fairness Checker" id="fb-embed-hvac-bid-checker" width="100%" height="560" loading="lazy" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px"></iframe> <p style="font-size:12px;color:#555;margin:6px 0 0">Powered by <a href="https://thefatbook.com/hvac/bid-checker/" target="_blank" rel="noopener">HVAC Bid Fairness Checker by TheFatBook</a></p> <script>window.addEventListener('message',function(e){if(e.data&&e.data.type==='fb-resize'&&e.data.calc==='bid-checker'){var f=document.getElementById('fb-embed-hvac-bid-checker');if(f)f.style.height=e.data.height+'px';}});</script>
HVAC True Cost Calculator
<iframe src="https://thefatbook.com/hvac/embed/true-cost/" title="HVAC True Cost Calculator" id="fb-embed-hvac-true-cost" width="100%" height="640" loading="lazy" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px"></iframe> <p style="font-size:12px;color:#555;margin:6px 0 0">Powered by <a href="https://thefatbook.com/hvac/calculators/" target="_blank" rel="noopener">HVAC True Cost Calculator by TheFatBook</a></p> <script>window.addEventListener('message',function(e){if(e.data&&e.data.type==='fb-resize'&&e.data.calc==='true-cost'){var f=document.getElementById('fb-embed-hvac-true-cost');if(f)f.style.height=e.data.height+'px';}});</script>
HVAC sizing calculator
<iframe src="https://thefatbook.com/hvac/embed/sizing-calculator/" title="HVAC sizing calculator" id="fb-embed-hvac-sizing-calculator" width="100%" height="600" loading="lazy" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px"></iframe> <p style="font-size:12px;color:#555;margin:6px 0 0">Powered by <a href="https://thefatbook.com/hvac/sizing-calculator/" target="_blank" rel="noopener">HVAC sizing calculator by TheFatBook</a></p> <script>window.addEventListener('message',function(e){if(e.data&&e.data.type==='fb-resize'&&e.data.calc==='sizing-calculator'){var f=document.getElementById('fb-embed-hvac-sizing-calculator');if(f)f.style.height=e.data.height+'px';}});</script>
HVAC Financing Calculator
<iframe src="https://thefatbook.com/hvac/embed/financing/" title="HVAC Financing Calculator" id="fb-embed-hvac-financing" width="100%" height="560" loading="lazy" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px"></iframe> <p style="font-size:12px;color:#555;margin:6px 0 0">Powered by <a href="https://thefatbook.com/hvac/calculators/" target="_blank" rel="noopener">HVAC Financing Calculator by TheFatBook</a></p> <script>window.addEventListener('message',function(e){if(e.data&&e.data.type==='fb-resize'&&e.data.calc==='financing'){var f=document.getElementById('fb-embed-hvac-financing');if(f)f.style.height=e.data.height+'px';}});</script>
HVAC Estimate Checker
<iframe src="https://thefatbook.com/hvac/embed/upload/" title="HVAC Estimate Checker" id="fb-embed-hvac-upload" width="100%" height="600" loading="lazy" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px"></iframe> <p style="font-size:12px;color:#555;margin:6px 0 0">Powered by <a href="https://thefatbook.com/hvac/calculators/" target="_blank" rel="noopener">HVAC Estimate Checker by TheFatBook</a></p> <script>window.addEventListener('message',function(e){if(e.data&&e.data.type==='fb-resize'&&e.data.calc==='upload'){var f=document.getElementById('fb-embed-hvac-upload');if(f)f.style.height=e.data.height+'px';}});</script>
Specialty tool
HVAC sizing calculator
Estimate AC tons, BTU load, and ductwork CFM, then see what an installer charges for that scope in your city.
Open sizing calculator →
Specialty tool
BTU calculator
Cooling, heating, and mini-split loads in one tool, with the local installed cost for the size you actually need.
Open BTU calculator →
Calculator FAQ

Using the HVAC calculator.

How does the HVAC cost calculator work?
It prices the job from the ground up: Craftsman labor hours times the BLS wage for your metro, plus PPI-adjusted materials, the verified permit fee where we have it, and a per-trade overhead benchmark. That gives a cost to deliver, and the fair range sits above it. Pick your city and service and it sizes the number to your market.
Is it free, and do I have to enter my contact information?
Free, and no. You get the number with no signup: the calculator runs in your browser on published cost data, so nobody asks for your email or phone to see the answer.
How accurate are the estimates?
They are modeled from federal wage data, a licensed cost book, current material price indices, and real city permit fees, not survey self-reports or scraped quotes. Treat the result as a fair market benchmark to check a bid against, not a binding quote. Your home's specifics and a contractor's scope still move the final number.
Can I check a contractor's bid with it?
Yes. Paste the quote into the bid checker and it grades the number against the local range, the lowest realistic price, and the typical contractor margin. A 15 to 22 percent margin on the bid is normal and earned, roughly 18 to 28 percent over the cost to deliver, with a fair ceiling higher on complex trades, so the checker flags a bid that runs well past that and gives you something concrete to negotiate with before you sign.
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Cost index built by David Olson, Creator of the Cost Index & Permit Dataset · Methodology reviewed by Leonard "Chuck" Thompson, LC Thompson Construction Co., Owner (retired) · 2026-08-19