Skip to main content
Independent Cost Data

Plumbing 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 plumbing benchmark of $1,832, 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.

$1,832
Average
$1,734 to $2,003
Typical Range
$1,734
Lowest realistic price
17.6%
Margin
How this number is calculated

Every plumbing number here starts as parts: Craftsman labor hours priced at BLS wages for your metro, materials tracked against producer prices, permit data where cities publish it, and real contractor overhead. Cost index version: 2026-08-19. Updated Aug 2026.

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

What the plumbing benchmark includes.

Included in the benchmark
  • Water Heater 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 plumbing bid fair?

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

Pick the service and metro, then see what the work should cost before the van shows up.

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.
Or
Upload contractor estimate
Drag and drop or click here. PDF or CSV, we extract the line items.
Or paste it
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$1,734 to $2,003
Cost to deliver$1,510
Typical market bid$1,832
Your bid$1,832
Implied margin18%
Fair range. Cost to deliver is the break-even, the red line on the gauge, not the price to demand. A fair bid sits in the green band above it: most jobs 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. Contractors earn that, and they should: nobody works for free, and if the job were easy you would not need one.
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.

Plumbing Bid Fairness Checker
<iframe src="https://thefatbook.com/plumbing/embed/bid-checker/" title="Plumbing Bid Fairness Checker" id="fb-embed-plumbing-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/plumbing/bid-checker/" target="_blank" rel="noopener">Plumbing 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-plumbing-bid-checker');if(f)f.style.height=e.data.height+'px';}});</script>
Plumbing True Cost Calculator
<iframe src="https://thefatbook.com/plumbing/embed/true-cost/" title="Plumbing True Cost Calculator" id="fb-embed-plumbing-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/plumbing/calculators/" target="_blank" rel="noopener">Plumbing 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-plumbing-true-cost');if(f)f.style.height=e.data.height+'px';}});</script>
Water heater sizing calculator
<iframe src="https://thefatbook.com/plumbing/embed/water-heater-calculator/" title="Water heater sizing calculator" id="fb-embed-plumbing-water-heater-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/plumbing/water-heater-calculator/" target="_blank" rel="noopener">Water heater sizing calculator by TheFatBook</a></p> <script>window.addEventListener('message',function(e){if(e.data&&e.data.type==='fb-resize'&&e.data.calc==='water-heater-calculator'){var f=document.getElementById('fb-embed-plumbing-water-heater-calculator');if(f)f.style.height=e.data.height+'px';}});</script>
Plumbing Financing Calculator
<iframe src="https://thefatbook.com/plumbing/embed/financing/" title="Plumbing Financing Calculator" id="fb-embed-plumbing-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/plumbing/calculators/" target="_blank" rel="noopener">Plumbing 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-plumbing-financing');if(f)f.style.height=e.data.height+'px';}});</script>
Plumbing Estimate Checker
<iframe src="https://thefatbook.com/plumbing/embed/upload/" title="Plumbing Estimate Checker" id="fb-embed-plumbing-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/plumbing/calculators/" target="_blank" rel="noopener">Plumbing 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-plumbing-upload');if(f)f.style.height=e.data.height+'px';}});</script>
Specialty tool
Water heater sizing calculator
Pick the right tank size or tankless GPM and see what a plumber charges to install it in your metro.
Open water heater calculator →
Calculator FAQ

Using the plumbing calculator.

How does the plumbing 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.
DO
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