Plumber vs Welder 2026:
$61,550 vs $50,820
Updated 18 May 2026 | Sources: BLS OEWS 47-2152 | BLS OEWS 51-4121 | AWS certification framework
Plumber median sits $10,730 above welder median nationally. The gap reflects credential structure rather than skill difficulty. Specialty welder paths (pipeline, underwater, nuclear) easily exceed plumber peak earnings, but mainstream welders earn meaningfully less than mainstream plumbers.
Plumber Median
$61,550
Welder Median
$50,820
Gap
+$10,730 plumber
Pipeline Welder Peak
$200K+
Section 01
Side-by-Side: 12 Factors
Pay is one of twelve relevant factors. The full comparison considers credential structure, license requirements, training time, and the very different distribution of specialty earning paths.
| Factor | Plumber | Welder |
|---|---|---|
| BLS Code | 47-2152 | 51-4121 |
| National Median (2024 OEWS) | $61,550 | $50,820 |
| Top 10 Percent | $104,790 | $72,970 |
| Bottom 10 Percent | $38,490 | $33,750 |
| Annual Employment (US) | ~492,000 | ~431,000 |
| Job Outlook 2023 to 2033 (BLS) | +2% | +2% |
| Typical Training | 4 to 5 year apprenticeship | 6 month to 2 year trade school + cert path |
| Primary Credential | State Journeyman / Master Plumber | AWS certifications (D1.1, D1.5, etc.) per procedure |
| License Required to Work? | Yes (state-issued) | No state license required; cert-based |
| Top Specialty Pay Ceiling | Master + contractor: $250K+ | Underwater + nuclear + pipeline: $200K+ |
| Self-Employment Model | Contractor business; recurring revenue | Mostly contract / project work; less recurring |
| Union Density | ~22% (UA dominant) | ~18% (UA pipefitter + Boilermakers) |
BLS OEWS May 2024 release. BLS OOH 2023 to 2033 growth projections. AWS certification framework is the welder credential standard; specific employers may layer their own procedure-qualification tests on top.
Section 02
Why Plumbers Earn More on Median
The plumber median exceeds the welder median by $10,730 (17 percent) despite both trades requiring comparable skill investment. Three structural factors explain the gap.
First, plumbing has a state-level license barrier; welding does not. To work as a journeyman plumber in any US state, the worker must hold a state-issued license obtained through multi-year apprenticeship and exam. The license barrier constrains labour supply and supports the wage. Welding has no equivalent state license requirement; competency is demonstrated through AWS certifications (or equivalent procedure-specific tests) that any employer can administer in a day. The lower barrier to entry means more workers can fill general welder positions, which keeps median wages lower.
Second, plumbing has a credentialed progression ladder; welding has a procedural certification stack. The plumber moves apprentice to journeyman to master to contractor over a 10 to 20 year career, with defined pay premiums at each tier. Each tier change is institutionally recognised and the pay scale follows. The welder accumulates AWS certifications and employer-specific qualifications over the same career horizon, but there is no equivalent tier structure. A welder with 20 years of experience and 12 procedure qualifications may earn less than a 5-year journeyman plumber in a major union market because the welder lacks a credential structure that compels the wage premium.
Third, plumbing has recurring-revenue service-side business models; welding does not. The plumbing contractor builds a service business with route accounts, recurring inspections, and emergency call response that generates predictable monthly revenue. The welder, by contrast, works mostly on project-mobilized contracts (commercial construction, industrial outages, pipeline projects) where the work is project-cyclical. The service-side business model on plumbing creates a self-employment pay ceiling (plumbing contractor at $250K+) that does not have a clean welding parallel.
The plumber-welder pay gap on median is genuinely structural. It is not a skill-difficulty gap; it is a credential-architecture gap.
Section 03
The Welder Specialty Paths That Beat Plumber Pay
The median-wage comparison hides the fact that several welder specialty paths produce earnings well above plumber peak earnings. The specialties exist because specific high-consequence welding work commands premium pay for the small subset of welders qualified to perform it.
Underwater welder (commercial diver-welder). Underwater welders combine commercial-diving certification with welding qualification to perform repair work on offshore platforms, pipelines, ship hulls, and harbour infrastructure. The pay structure stacks dive premium, depth premium, and welding premium; gross earnings of $80,000 to $200,000+ are routine, with top tier offshore work easily exceeding $250,000. The training pipeline is intense (commercial dive school plus welding qualification plus offshore operations training, typically 12 to 24 months) and the work is genuinely dangerous; mortality rates in commercial diving are meaningfully higher than other trades.
Pipeline welder (UA Local 798). The UA Local 798 cross-country pipeline welder routinely earns $150,000 to $200,000+ gross including overtime and per-diem during the construction season. The work is itinerant (chasing pipeline projects across the country) and seasonal (April through November in northern climates), but during the construction season the income compression is extreme. A welder doing a full-season rotation can clear $175,000 in gross earnings before mid-November.
Nuclear-qualified welder. Nuclear plant outage welders work on safety-related piping systems under the NQA-1 nuclear quality assurance regime. The credential and procedural overhead create a small qualified-worker pool. Outage rates run $50 to $75 per hour base plus 60 to 84 hour weeks during outage windows plus $100 to $175 per diem. A nuclear welder stringing 4 to 6 outages per year clears $130,000 to $180,000.
Aerospace and military welder. TIG welders qualified to aerospace specifications (titanium, Inconel, specialty alloys) earn premium pay at major aerospace primes (Boeing, Lockheed, Northrop, SpaceX) and at certified aerospace job-shops. Pay typically runs $40 to $65 per hour base, with overtime in production-surge periods adding meaningfully. Clearance and citizenship requirements limit the qualified pool, supporting the wage premium.
Section 04
The Pipefitter Overlap
The cleanest crossover between the plumber and welder worlds is the pipefitter, particularly the welder-pipefitter. The role is technically catalogued under the same BLS code as plumbers (47-2152) but spends significant time doing welding work that overlaps with the welder occupation (51-4121).
UA Locals train pipefitters who can do both layout-and-fitting work and the actual weld joining. On industrial pipefitting projects (refineries, power plants, chemical plants) the welder-pipefitter is the highest-paid role on the project, earning the pipefitter base wage plus a welder premium of $4 to $10 per hour for the welder qualification. The combined wage in a major industrial market (Houston, Beaumont, Lake Charles, Baton Rouge) for a journeyman welder-pipefitter runs $42 to $58 per hour base plus generous overtime and per-diem on turnaround work.
For a plumber considering a pivot toward welding, the welder-pipefitter path is the easiest because the trade union (UA) covers both halves and provides training for the welder-qualification add-on. A journeyman plumber wanting to add welder qualifications can typically do so through the local UA JATC's journeyman upgrade program, with most weld procedure qualifications acquired in weeks of focused practice plus a procedural test. The combined credential opens up industrial-pipefitter project work that pure plumbers cannot access.
For a welder considering a pivot toward plumbing, the path is harder because plumbing requires the state license pathway that has no equivalent in welding. The welder must enter a plumbing apprenticeship (with some OJT-hour credit possibly granted for general construction experience) and complete the 4 to 5 year program plus state journeyman exam. The crossover is meaningful but requires the credential investment that the welder-to-pipefitter crossover does not.