How to Invoice as a Welder: Rates, Terms and Templates

TL;DR: Itemise shop or field labour hours, consumables (rod, wire, gas), and materials separately, reference the job or asset ID, note certification level when coded work is involved, and invoice progress draws on multi-week fabrication rather than waiting until the job ships.

Welding invoices cover shop fabrication, field repair, and coded structural work. Clients may not read a WPS, but they do read hours, consumables, and inspection—make those visible. When jobs require NDT or third-party inspection, either pass through with markup or quote inspection as its own line so nobody assumes it was free.

Travel with a rig, after-hours plant shutdowns, and hazard pay environments should be priced and labelled before the torch strikes. When you weld food-grade or pressure-boundary joints, the invoice should hint at procedure control without publishing proprietary WPS numbers unless the client requires them. Cut lists and remnants returned to the customer should be noted (“material supplied by client” vs “fab stock”) so weight-based billing never doubles up.

Typical rates

Shop work might bill hourly ($65–$120+ depending on certification and region) plus material at cost or quoted cut lists. Field mobilisation often adds a truck/minimum or portal-to-portal policy. Small repairs may be flat minimum plus time over threshold. For industry context on welding as a skilled trade, the American Welding Society publishes standards and education resources—useful when clients question why coded work costs more. Aluminium, stainless, and exotic alloys often carry different consumable and gas costs—itemise when the job mixes metals so procurement sees why the second day cost more than the first.

Hourly shop rates ($65-$120+ depending on certification and region) are standard for fabrication and repair work. Field/mobile rates run higher ($85-$150+) to cover rig travel, fuel, and portal-to-portal time. Per-project flat pricing works for defined fabrication jobs (gates, railings, structural beams) where you can estimate material and time from drawings. Day rates ($600-$1,200+) suit industrial shutdowns and plant maintenance where you commit a full day on-site.

Certified welders (AWS D1.1 structural, ASME pressure vessel, API pipeline) command higher rates than general MIG/TIG work. If you hold multiple certifications, reference the applicable one on each invoice so clients see why coded work costs more. Raise rates when steel prices jump, when consumable costs increase (specialty wire and shielding gas are volatile), or when your schedule fills to the point where you are turning down work.

Sample invoice line items

When to send the invoice

For shop fabrication, bill at milestones: deposit when steel is ordered, progress draw at fit-up (before welding), and final on completion before release for pickup, delivery, or galvanising. Waiting until the entire multi-week fab is done puts all the financial risk on you.

On field repair and mobile work, invoice the same day the work is completed. Mobile rig jobs are often one-off clients -- billing immediately while you are still on-site or within hours ensures the work is fresh in the client's mind.

For industrial maintenance and plant shutdowns, invoice per the PO schedule, typically weekly or at the end of each shutdown phase. Include the PO number, unit or equipment tag, and hours worked each day.

Payment terms

Retail and one-off repairs: due on pickup or COD. Industrial maintenance: Net 15–30 after PO match. Fabrication for contractors: deposit on steel order, progress at fit-up, final before release for galvanising or delivery. Rush and overtime: pre-approval in writing, repeated on the invoice. Align schedules with invoice payment terms. Hold harmless or hot-work permits sometimes carry fees—pass them through or absorb them deliberately, but do not surprise a plant manager.

What to include

Client, job or asset ID, invoice date/number, process and joint summary at client-appropriate detail, hours and rate, consumables (rod, wire, gas) if billed separately, material weights or part numbers, travel or rig fee, inspection charges, subtotal, tax, total, due date. Note WPS/PQR or inspector sign-off reference internally for audits. How to write an invoice covers standard headers. Blast-and-paint coordination should show whether you subbed finishing or only fabbed—mixed scopes confuse insurance adjusters after a failure. Rework due to customer-supplied material defects belongs on a change-order line, not buried in “shop time.”

Common mistakes

“Welding—4 hrs” with no part or location reference. Consumables eaten by margin because they were never line-itemed. Waiting to invoice until the whole multi-week fab is done—use progress billing. Certificates requested after the fact without a line for documentation time. Dimensional rework caused by customer-supplied prints—invoice fix time under a CO, not as warranty. Galvanising or coating steps forgotten until the truck is loaded. Travel time billed as shop hours—if you use portal-to-portal, say so on the estimate and invoice footer so customers do not think you padded labour on the bench.

Not separating stainless or aluminium consumable costs from mild steel -- TIG filler rod and argon gas for stainless cost significantly more than MIG wire and C25 for carbon steel; lumping them together on a mixed-metal job understates your costs. Failing to document weld rework caused by client-supplied material defects (mill scale, out-of-spec plate, wrong alloy) -- this belongs on a change-order line, not absorbed as warranty. Skipping the mobilisation fee on short field jobs -- even a 30-minute rail repair requires loading the rig, driving, setting up, and driving home; bill the mobilisation fee every time.

FAQ

Should I charge differently for certified versus non-certified welding? Yes. Certified structural, pressure, or pipeline welding carries higher liability, requires ongoing testing to maintain credentials, and demands stricter quality control. Maintain separate rate cards for general fabrication and certified work, and reference the applicable certification (e.g., "AWS D1.1 structural") on the invoice line so the client sees why the rate is higher.

How do I handle material supplied by the client? Note "material supplied by customer" on the invoice for those items and bill only labour and consumables. Inspect customer-supplied material before cutting or welding -- if it is defective, document the condition in writing and get approval before proceeding. Any rework caused by bad material should be a separate change-order line on the invoice.

What is the best way to bill for a rig/truck fee on mobile work? Charge a flat mobilisation fee based on distance brackets (e.g., $100 within 25 miles, $175 for 25-50 miles) or a per-mile rate plus a minimum. Show the mobilisation as its own line, separate from labour. This makes the cost transparent and prevents clients from thinking you padded your hours to cover drive time.

Template link

The freelance invoice template works well for hourly fab, materials, and mobilisation fees on one page.

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