Ask an electrical contractor what happened to material costs since 2019 and you will hear about copper. That is correct as far as it goes. What the copper story leaves out is what happened to the distribution layer sitting between the mill and your counter ticket, and that layer is where the more useful number lives.
The Bureau of Labor Statistics publishes a producer price index for electrical goods wholesalers. It is worth being precise about what that index measures, because almost everyone who cites it gets this wrong. It does not track the price of the goods. BLS treats wholesalers as service providers, so the index tracks the gross margin the wholesaler receives, which is the spread between what they pay for a reel of wire and what they charge you for it.
Since December 2019 that margin index has risen 96.5%.
- Electrical goods wholesaler margins (PCU423600423600)
- Electrical contractor output prices (PCU23821X23821X)
- Copper wire and cable (WPU10260314)
The gap that matters to a contractor
Over the identical months, the price index for electrical contractors’ own output, meaning what you can charge for nonresidential electrical work, rose 38.0%.
| Dec 2019 = 100 | Jun 2026 | Change |
|---|---|---|
| Electrical goods wholesaler margins | 196.5 | +96.5% |
| Copper wire and cable | 192.8 | +92.8% |
| Electrical contractor output prices | 138.0 | +38.0% |
Your input side roughly doubled. Your billable side moved 38 points. Nobody sent a memo about it, because it did not happen in any single month. It happened at a few tenths of a percent a month for six and a half years.
Before blaming your distributor, read the next number
There is an obvious conclusion available here, and it is the wrong one. The tempting read is that distributors widened their margins because they could. The data does not support that, and it is worth walking through why, because this is exactly the sort of claim that gets repeated until somebody checks it.
If a distributor applies a roughly constant percentage markup, then a doubling of the cost base doubles the dollar margin all by itself. No decision required. The margin index would nearly double while the distributor’s actual pricing behavior never changed at all.
That appears to be close to what happened. Copper wire rose 92.8%. The electrical wholesaler margin index rose 96.5%. The ratio between those two growth rates is 1.019, which is about as close to proportional as this kind of data gets.
So the honest statement is narrower than the headline number suggests: the dollar margin on electrical material has nearly doubled, and most of that is arithmetic rather than intent.
Why that is worse news, not better
A margin that expands because someone decided to expand it can be negotiated down. A margin that expands because it is a percentage of a rising cost base cannot. It will keep compounding with every copper move, automatically, whether or not anyone at the branch ever thinks about it.
And the contractor is the one absorbing it, because the contractor’s own output prices are set in a competitive bid market that moved 38%.
The plumbing and HVAC comparison
This is not a story about wholesale distribution generally. Run the same two series for plumbing, heating and air conditioning goods wholesalers and the picture is completely different.
- Electrical goods wholesaler margins (PCU423600423600)
- Plumbing/HVAC goods wholesaler margins (PCU423700423700)
- Plumbing/HVAC contractor output prices (PCU23822X23822X)
| Dec 2019 = 100 | Jun 2026 | Change |
|---|---|---|
| Plumbing and HVAC wholesaler margins | 130.1 | +30.1% |
| Plumbing and HVAC contractor output prices | 132.5 | +32.5% |
Plumbing and HVAC wholesaler margins rose 30.1% while their contractors’ output prices rose 32.5%. Those two track each other almost exactly. There is no squeeze in that trade of the kind the electrical numbers show, because the input side never doubled: plumbing fixture fittings and trim rose 35.8%, not 92.8%.
The electrical squeeze is a copper story that becomes a margin story because of how markup arithmetic works. It is specific to a trade whose primary commodity input doubled.
What to actually do about it
The index tells you what the market did. It cannot tell you what your branch did to you specifically, and that distinction is the whole job.
If copper wire moved 92.8% since 2019 and your wire pricing moved 130%, the difference is not the market. It is your account, and it is a conversation worth having with a number attached. If your pricing moved 90%, your distributor passed through roughly what everyone else did, and the argument you should be having is with your own estimating assumptions instead.
Neither of those conversations is possible without a unit price history of your own. The index is the benchmark. Your invoices are the measurement.
Limits of this analysis
Four caveats, all of which cut against overreading the numbers above.
Coverage is broader than electrical distribution alone. The wholesaler series sits under NAICS 4236, household appliances and electrical and electronic goods merchant wholesalers. That includes distributors who never sell to a contractor.
Producer price indexes are factory-gate and first-transaction measures, not counter prices. They tell you what the market did. They do not tell you what you paid.
Recent months are preliminary. BLS marks the most recent four months provisional and revises them. Figures here that carry a (P) in the source data can move.
Margin composition is not visible. The index measures gross margin received. It cannot separate a markup change from a mix shift toward higher-margin product lines, and the second explanation is entirely plausible over a six-year window.
None of those caveats change the number a contractor actually has to live with, which is that material inputs roughly doubled while billable output prices moved 38 points.