How to Invoice as a 3D Artist: Milestones and Kill Fees

The question most 3D artists actually ask is not "what goes on an invoice" but "how do I make sure I get paid for weeks of modelling before the client sees a finished asset?" The answer is in the schedule: break the project into stages the client approves, invoice each one, and never be more than one stage of work ahead of the money.

This guide walks through a full project's invoices from signing to delivery, a change order, a cancellation with a kill fee, and a studio day-rate invoice. For a single detailed invoice with render costs, file formats and a license line, see the worked example on the 3D artist invoice template page.

How should you schedule invoices on a fixed-price 3D project?

Tie each invoice to a stage the client can approve by looking at it, and put the schedule in the contract so every invoice is expected. One workable split is a deposit of a quarter to a third on signing, with the rest spread over the milestones and weighted towards the stages that take longest. Weighting the final payment lightly matters: if 50% is due on delivery, half the project's value is at risk at the moment the client already has the files.

Worked example: three game characters, four invoices

Hypothetical example. The prices are this artist's contract terms, not market benchmarks. A freelance 3D artist signs a contract on 2 September 2026 with an indie studio to create three stylised characters (modelled, textured, rigged and exported to Unreal Engine) for a fixed $9,600, with two revision rounds per milestone.

Each invoice names the milestone, lists the characters and what was approved, and says when the approval was given ("Milestone 2 approved by email, 22 October"). Work on the next milestone starts when the previous invoice is paid. Payment terms are Net 14.

The artist shares approval renders and turntables during the project, but keeps final source and engine files until the last invoice is paid. The invoice note says so: "Final .blend, .fbx and Unreal project files delivered on receipt of payment."

How do you bill a change of brief?

When the client asks for something outside the signed scope, price it before doing it, get written approval and bill it as its own line. In the example, after milestone 2 the studio asks for an armoured variant of one character. The artist quotes $1,200 by email, the producer approves it on 27 October, and invoice 4 becomes:

Number your change orders and use the same number on the quote and the invoice line, so the producer can match them. Extra revision rounds beyond the two included work the same way; the scope creep guide covers the wording.

What happens if the client cancels mid-project?

You need a kill fee clause in the contract, because without one you are paid only for what you can prove was delivered. A typical clause says the client pays for every completed milestone plus a fixed share of the milestone in progress, and the artist delivers the approved work to date.

In the example, suppose the studio cancels on 30 October, a week into milestone 3, after paying invoices 1 to 3 ($7,680.00). The contract's kill fee is 50% of the milestone in progress:

The note lists what is delivered with the final payment (the approved milestone 2 models and textures) and what is not (the unfinished rigs). Because the deposit and milestones were paid as the work progressed, the artist ends the cancelled project with $8,640.00 for the work done, rather than chasing a single large invoice.

How do you invoice day-rate studio work?

Studios that bring in freelancers for a production stage usually pay a day rate and want an invoice every week or two. Show each day, the hours, any approved overtime and the studio's project or cost code.

Hypothetical example. A 3D artist embedded with an animation studio at $480 for an 8-hour day, with overtime at 1.5 times the $60 hourly equivalent, invoices for the two weeks ending Friday 16 October 2026:

If the studio supplies the workstation and software, there is nothing to pass through. If you work remotely on your own hardware and render on a paid cloud service for the studio, bill the render cost at cost with the receipt, as a separate line.

What else should a 3D artist invoice include?

Beyond your details, the client's details, a unique invoice number, dates, the lines and the total (see what to include on an invoice and how to write an invoice), 3D invoices should show:

• The milestone or stage and when it was approved.
• Asset names or counts, matching the names in the client's tracker.
• Delivered formats (for example FBX, glTF, USD) when the invoice goes with a delivery.
• Revision rounds used if you are billing extra rounds.
• The license or rights line. In the US, a transfer of copyright ownership is not valid unless it is in writing and signed by the owner of the rights (17 U.S.C. § 204(a), accessed October 2026), so paying an invoice does not by itself hand over copyright. State what the client receives and refer to the signed agreement.
• The client's PO or project code, and payment terms, including any late fee your contract allows.

Which tax and payment points apply?

This is general information, last reviewed October 2026; check with your tax authority or an adviser.

• US clients. Clients usually ask for a Form W-9. For tax years beginning after 2025, a business generally files Form 1099-NEC if it pays a contractor $2,000 or more for services in the year, and card or third-party network payments are reported on Form 1099-K instead (IRS: Instructions for Forms 1099-MISC and 1099-NEC, accessed October 2026).
• Artists outside the US with US clients typically give a Form W-8BEN instead (IRS: About Form W-8 BEN).
• Foreign-currency clients. State the invoice currency and who pays transfer fees, so a $1,920 invoice does not arrive as $1,880.
• Sales tax and VAT on digital models and animation depend on where you and the client are and what is delivered. Check before adding a tax line.

Freelancing is common in this field. The US Bureau of Labor Statistics counts about 51,900 special effects artist and animator jobs in 2025, 63% of them held by self-employed workers; its median annual wage of $102,030 (May 2025) covers employees only, so it is not a freelance rate benchmark (BLS Occupational Outlook Handbook: Special Effects Artists and Animators, accessed October 2026).

How InvoiceQuickly fits a 3D artist's invoicing

Type or record "Invoice Lantern Games for milestone 3, 20% of $9,600, plus change order CO-1 armoured variant $1,200, Net 14", and InvoiceQuickly drafts the client, lines and terms into an editable invoice you review before saving.

Available today:

• Free: 5 invoices, 5 clients and 3 AI drafts in total, PDF download and payment recording. The four-invoice project above fits, with one to spare.
• Pro ($9/month): unlimited invoices and AI drafts; estimates the client can accept in a private portal and convert to an invoice, which suits change-order quotes; email delivery with the PDF attached; scheduled reminders before and after the due date; payment links through your own Stripe or PayPal account; credit notes; and CSV export. See pricing.
• Currencies: USD, EUR, GBP, CAD, AUD, INR and PKR, without automatic conversion.

Limits to know:

• No milestone schedule or deposit feature. Create each milestone invoice when it is due; duplicating the previous one saves retyping.
• Lines are quantity times price, so enter a percentage-based milestone as its amount and put the percentage in the description, as above.
• No file delivery or attachments on invoices. Deliver files in your usual tools. Hours for day-rate or overtime work can be logged on Pro with a timer or manual entries (up to 24 hours per entry), or kept in your usual tracker.
• Your saved tax ID is copied to new invoice PDFs. Set it before creating the document and check the PDF before sending.

For more freelance billing patterns, see InvoiceQuickly for freelancers and the milestone-based invoicing guide.

Frequently asked questions

How much deposit should a 3D artist take?

Enough that the client is committed and you are not working unpaid for the first stage. In the example, 30% covers the blockout milestone (20%) with room to spare. Whatever you choose, put it in the contract and invoice it before you start the blockout.

Should I send final files before the last invoice is paid?

Share previews, renders and turntables for approval, but keep the final source and engine files until the final invoice is paid, and say so on the invoice. Agree this in the contract so it is not a surprise.

How do I invoice extra revision rounds?

As a separate line or change order with the round number ("revision round 3, 2 included") and the agreed fee or hours, approved in writing before you start the round.

What is a kill fee in 3D work?

A payment owed if the client cancels part-way through, set in the contract. It usually covers completed milestones plus a share of the stage in progress, in return for the approved work to date.

Should a day-rate invoice show hours?

Yes. Show the days worked, the standard day length and any overtime with who approved it, so the studio's production team can check it against their schedule.

Who owns the 3D models once the client pays?

It depends on your contract. In the US, transferring copyright requires a signed written agreement, so state the license or transfer on the invoice and point to that agreement.