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Invoice for Trades

Free Welding Invoice Template

A welding job starts at one of two doors: the shop, where work is billed by the hour against a drawing, or the field, where the rig rolls and the clock starts at the truck. This welding invoice template handles both, with lines for certified labor, stock with markup, per-foot fabrication and the mobile minimum that keeps a service truck worth driving. Price the job, download the PDF, and bill it before the metal cools.

Sample welding invoice

Billed to Ridgeline Metalworks, stair handrail, phase 1. Rates are illustrative, not quotes.

DescriptionQtyUnitRateAmount
Certified welder, shop TIG, aluminum and stainless3hr$95.00$285.00
Mild steel stock, supplied, cost plus 20%1job$180.00$180.00
Handrail fabrication and installation, per linear foot24lf$58.00$1,392.00
Total$1,857.00

Pricing shop work against field work

Shop welding bills against the clock and the drawing: certified labor by the hour, stock and consumables as their own lines, and the finish work (primer, paint, outsourced powder coat) at piece prices. The customer drops the part, the shop controls the environment, and the invoice reads as hours plus materials. It is the cheaper way to buy welding, and the invoice should make that visible.

Field work costs more to deliver, so it bills differently: a mobile minimum that covers the rig, the generator, the gases and the drive, then labor beyond it. The welding invoice for a service call should show the minimum as its own line even when the work consumed it entirely, because customers who see the minimum as a line understand it, and customers who see it buried inside an hourly total think they were overcharged.

What a welding invoice should show

A welding invoice should let someone else rebuild the job from it: the material and its thickness, the process used (MIG, TIG, stick), the labor hours, and the drawing or sketch the work followed, referenced by number. When a job requires a certified welder or a specific procedure, note the certification on the invoice, because that line is what lets the customer's inspector sign the work off.

Repairs deserve the same documentation with one addition: what failed, and what the fix was. A trailer repair invoice that says gate hinge rewelded, hinge-side, answers the question the customer asks in eight months if it ever lets go again. Welding is invisible once it is painted. The invoice is the only place the work stays visible, and that is why it pays to write it like it matters.

Materials markup and consumables

Stock is where fabrication jobs make their margin, and the invoice should say so openly: steel supplied at cost plus a stated percentage, on its own line, the same words the contract or estimate used. Customers accept a materials markup they were told about. What they do not accept is discovering it by comparing the invoice to a steel supplier's website an hour after pickup.

Consumables are the quieter question. Wire, discs, argon and tips are real money, and the two honest ways to bill them are to fold them into the shop rate or to itemize them. Either is fine, but the invoice should say which one it is doing. Customer-supplied metal is its own case: bill the labor, note the material on the invoice as supplied by the customer, and let the line explain why the warranty on that weld covers workmanship only.

Getting paid on fabrication jobs

Fabrication runs on materials money first: a deposit covering the stock before the order goes in, stated on the estimate and repeated on the invoice. A fabrication invoice then follows the build: deposit applied, progress billed on long assemblies, balance due at pickup for shop work. Customers paying for a handrail want to see the per-foot quantity on the invoice match the rail they are carrying to the truck.

Industrial and trade accounts run on net terms, and those terms live on the invoice: due date, late charge, purchase order number if one governs the job. The pattern that keeps a welding shop paid is the same at both scales: money for materials up front, clear line items in the middle, and a due date at the end that the invoice states rather than implies.

Taxes on welding invoices

Sales tax on welding work usually follows the metal: materials and fabricated goods are commonly taxable, while pure repair labor is taxed unevenly from state to state. Work attached to real property (a handrail bolted to a building) can change the answer in some states. Keep stock, labor and finish work on separated lines so the invoice supports whichever treatment applies, and confirm the rules with your state's revenue department before setting the taxable flags.

This is general information, not legal or tax advice. Rules vary by location.

Frequently asked questions

How do I charge for a welding job with no drawing?

Bill the layout time to produce the sketch, then price against it. A customer who needs a gate frame but has no drawing is buying two things: the design judgment and the welds, and the invoice should show the layout as its own line before fabrication begins. Getting the sketch approved before cutting stock is what turns a vague request into a job you can invoice without a debate about what was promised.

Should consumables be a separate line on the invoice?

Either fold them into the shop rate or itemize them. Both are honest, and the invoice should simply say which one it is doing. What does not work is a shop rate that seems to include wire and gas, followed by a consumables line underneath it. If you itemize, keep the list short and real: wire, discs, gas by the job. A rate that quietly covers them is easier for everyone and defensible forever.

Can I weld on customer-supplied material and still warranty it?

Bill the labor, note the material as customer-supplied on the invoice, and limit the warranty to workmanship. You cannot verify an unknown alloy, a questionable prior repair, or metal that has been painted over its cracks, and the invoice line is where that limitation lives. Most customers accept it immediately once it is written down. The ones who object were hoping not to buy the right stock anyway.

What is a mobile welding minimum for?

The rig: the truck, the generator, the gases, the consumables loaded for every possibility, and the drive in both directions. The minimum exists because a twenty-minute weld still costs half a service day. Show it as its own line on the invoice, credit further work against it, and state it at booking. Customers accept a minimum they can see; the same amount hidden in an hourly total reads as padding.

How do I invoice a repair on equipment that fails again?

First decide whether it is the same failure or a new one: the diagnosis time answers that, and diagnosis is billable either way. Inside the workmanship window, a genuine failure of your weld becomes a zero-dollar line referencing the original invoice. A new failure at a different spot is a fresh repair and bills normally. The invoice is what makes the difference undeniable: what failed last time, what was done, and what is being done now.

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