Invoice Generator for Illustrators
Track creative project billing with clear line items for concept sketches, finals, and usage rights.
📖 Understand this document
An invoice is a formal request for payment. You send it to your client after completing work or reaching a payment milestone. It contains your business details, a description of the services rendered, the total amount due, and payment instructions.
Key components
- Invoice number — a unique sequential reference for your records and the client's accounts payable.
- Due date — when payment is expected. Net-15 or Net-30 are common.
- Line items — individual services or products with quantity, rate, and total.
- Payment terms — how you accept payment (bank transfer, PayPal, etc.) and any late fee policies.
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The Ultimate Guide to Invoicing and Client Management for Freelance Illustrators
Welcome to the most comprehensive resource available for freelance illustrators looking to master the business side of their craft. While art school and endless hours of practice have prepared you to create stunning visuals, the realities of running a freelance business—pricing, invoicing, negotiating, and protecting your work—often require a completely different skill set. This guide is designed to bridge that gap. Over the next several sections, we will dive deep into every aspect of freelance illustration from a business perspective, ensuring you have the tools, knowledge, and confidence to build a sustainable and profitable career.
Whether you are an editorial illustrator creating thought-provoking images for magazines, a children's book illustrator bringing whimsical worlds to life, a concept artist designing the next blockbuster video game, or a commercial illustrator working with global brands, the principles of professional practice remain remarkably consistent. Understanding how to structure your deliverables, set payment terms, accurately price your services, avoid common billing pitfalls, and draft ironclad invoices is essential. Let's explore these critical components in exhaustive detail.
1. Typical Deliverables for Freelance Illustrators
One of the most foundational elements of a successful client relationship is a clear, mutual understanding of deliverables. Deliverables are the tangible or digital assets you provide to the client at various stages of the project. A common mistake among early-career illustrators is failing to define these deliverables explicitly in the initial proposal or contract. This ambiguity often leads to scope creep, where a client continuously asks for "just one more thing" without offering additional compensation. By strictly defining your deliverables, you establish boundaries and expectations right from the start.
A. The Sketch Phase: Thumbnails and Roughs
The sketch phase is arguably the most critical part of the illustration process because it is where the conceptual foundation is laid. Deliverables in this phase usually start with thumbnails—small, quick sketches designed to explore composition, pacing, and basic ideas. Thumbnails are rarely detailed; their purpose is to communicate the "big picture." Professional illustrators typically present 3 to 5 thumbnail options for a client to choose from. Providing too many options can overwhelm the client, while providing too few can make them feel restricted.
Once a thumbnail is selected, the next deliverable is the rough sketch (or "tight sketch"). This is a more refined drawing that solidifies the proportions, details, and overall structure of the piece. It is crucial to have the client sign off on the tight sketch before moving to final art. Any major compositional changes requested after this point should incur an additional fee, as reworking the foundation of a nearly completed illustration is incredibly time-consuming. When outlining deliverables in your invoice or contract, explicitly state: "Delivery of 3 thumbnail concepts, followed by 1 refined rough sketch based on the selected thumbnail."
B. Color Comps and Value Studies
Depending on the complexity of the illustration and the specific needs of the client, you may also need to provide color comps (comprehensives) or value studies. Value studies are grayscale versions of the sketch that establish the lighting and contrast, ensuring the image reads well regardless of color. Color comps are small, quick color applications over the sketch to establish the mood and palette.
These deliverables are particularly important in commercial and advertising illustration, where strict brand guidelines and specific emotional responses are required. By including color comps as a distinct deliverable, you prevent situations where a client rejects a fully rendered illustration simply because they don't like the color scheme. It adds a crucial approval gateway that protects your time.
C. Final Art and File Formats
The ultimate deliverable is, of course, the final artwork. However, "final artwork" is an umbrella term that requires further specification. Are you delivering a layered PSD file, a flattened TIFF, a vector EPS, or a web-ready JPEG? The answer depends entirely on what the client intends to do with the artwork, which should be discussed during the initial consultation.
For print publications, clients typically require high-resolution (300 DPI or higher) CMYK files, often in TIFF or PDF format. For web usage, RGB files in JPEG or PNG formats are standard. If you are creating a logo, icon, or any graphic that needs to be scaled infinitely, vector files (AI, EPS, or SVG) are mandatory.
A critical point of negotiation is the delivery of source files (e.g., layered Photoshop files or raw Illustrator files). Many illustrators refuse to hand over source files, as doing so allows the client to alter the artwork without permission or hire another artist to modify it. If a client insists on having the source files, this should be treated as a premium deliverable and priced accordingly—often adding 50% to 100% to the total project cost. Your contract and invoice must explicitly state which file formats are included in the base fee and which are excluded.
D. Licensing and Usage Rights as Deliverables
Perhaps the most misunderstood aspect of freelance illustration is that clients are rarely buying the artwork itself; they are buying the *rights to use* the artwork. The license is a legally binding deliverable that dictates how, where, and for how long the client can use your illustration. Without a clear license, you run the risk of having your work exploited across platforms and campaigns you never agreed to, without receiving fair compensation.
A standard illustration license should define several key parameters:
- Media: Where will the artwork appear? (e.g., print magazines, social media, product packaging, billboards).
- Territory: In what geographic regions can the artwork be used? (e.g., North America, Worldwide, local only).
- Duration: How long does the client have the right to use the artwork? (e.g., 1 year, 5 years, in perpetuity).
- Exclusivity: Can you sell the same illustration to another client, or does this client have exclusive rights?
For example, a common deliverable might be: "One high-resolution flattened TIFF file, licensed for exclusive, worldwide use on digital and print product packaging for a period of two years." By treating the license as a specific deliverable, you educate the client on the value of intellectual property and position yourself to negotiate higher fees for broader usage rights. If the client later wants to use that packaging illustration on a national billboard campaign, they must return to you to purchase an expanded license.
2. Payment Terms: Kill Fees, Milestones, and Protecting Your Income
Establishing clear, professional payment terms is the bedrock of a stable freelance business. Unfortunately, many creatives feel uncomfortable discussing money and default to whatever terms the client suggests. This passive approach often results in late payments, uncompensated work, and immense financial stress. To thrive as an illustrator, you must take control of your payment structures, enforcing milestones, late fees, and kill fees with unyielding professionalism.
A. The Importance of Milestone Payments
Never, under any circumstances, agree to do a large illustration project for a single payment at the end. Relying solely on a final payment puts 100% of the financial risk on your shoulders. If the client goes bankrupt, cancels the project, or simply refuses to pay, you have lost weeks of unpaid labor. The standard practice for professional illustrators is to break the project fee into manageable milestones.
For a typical project, a "50/50" structure is standard: 50% upfront as a non-refundable deposit to secure your time and begin work, and 50% upon delivery of the final files. For larger, more complex projects (such as illustrating an entire children's book or creating dozens of assets for a game), a "Thirds" or "Quarters" structure is safer. A common thirds structure looks like this:
- 33% Upfront: Paid before any sketching begins.
- 33% Upon Sketch Approval: Paid when the client signs off on the final rough sketches.
- 34% Upon Final Delivery: Paid when the final, rendered artwork is completed and approved, but strictly before high-resolution files without watermarks are handed over.
Milestone payments ensure steady cash flow and act as a psychological commitment from the client. When a client has skin in the game financially, they are more responsive, provide better feedback, and are less likely to abandon the project.
B. Understanding and Enforcing Kill Fees
A "kill fee" (sometimes called a cancellation fee) is a contractual clause designed to compensate you if the client cancels the project before completion. Projects are cancelled for all sorts of reasons that have nothing to do with the quality of your work—budgets get slashed, creative directions change at the executive level, or entire campaigns are scrapped. Without a kill fee, you could spend a week conceptualizing and sketching, only to be told "never mind" and walk away empty-handed.
Kill fees are typically structured as a percentage of the total project cost, scaling depending on how far along the project was when it was killed. A standard kill fee schedule might look like this:
- Cancellation before sketching begins: 25% of total fee (often covered by the non-refundable deposit).
- Cancellation after sketches are delivered: 50% of total fee.
- Cancellation after color comps or partial rendering: 75% of total fee.
- Cancellation after final art is completed (even if rejected): 100% of total fee.
It is vital to communicate that a kill fee does not grant the client any rights to use the incomplete artwork. If a project is killed, all rights revert to the illustrator, and the client may not use the sketches or concepts for any purpose. This must be explicitly stated in your contract.
C. Late Payment Penalties and Net Terms
"Net terms" refer to the amount of time a client has to pay an invoice after it is issued. "Net 30" is the standard in the publishing and advertising industries, meaning the client has 30 days to remit payment. However, for smaller clients or direct-to-consumer commissions, "Due Upon Receipt" or "Net 15" are more appropriate.
To enforce these terms, you must implement late payment penalties. A standard late fee is 1.5% to 2% of the outstanding balance per month, compounding. While 1.5% might not seem like a lot, the presence of a late fee clause shows clients that you run a serious business and prioritizes your invoice in their accounts payable department. Make sure the late fee policy is clearly stated on every invoice, typically in the footer or notes section: "Payment is due within 30 days. A late fee of 1.5% per month will be applied to all overdue balances."
3. Pricing Context and Average Rates for Illustrators
Pricing illustration is notoriously difficult because there is no universal catalog of rates. An illustration for a local bakery's menu might command $300, while the exact same illustration used in a national Coca-Cola campaign could command $15,000. This disparity exists because pricing in commercial illustration is based on *value and usage*, not just time and materials. Understanding the context of the market and standard rate ranges is crucial for negotiating fair compensation.
A. Hourly vs. Flat Rate vs. Value-Based Pricing
Hourly Pricing: Charging by the hour is generally discouraged for illustrators. As you become faster and more skilled, an hourly rate actually penalizes you—you get paid less for doing the job better and faster. Hourly rates are only appropriate for open-ended, highly collaborative projects where the scope is undefined, such as ongoing conceptual consulting for an animation studio. If you must use an hourly rate, professional illustrators typically charge between $50 and $150+ per hour, depending on experience.
Flat Rate Pricing: This is the most common approach. You estimate how long the project will take, factor in your overhead, and quote a single price. Flat rates provide certainty for the client and allow you to profit from your efficiency. However, flat rates must be accompanied by strict scope boundaries (e.g., a limit on revisions) to remain profitable.
Value-Based Pricing: This is the gold standard for commercial illustration. Value-based pricing calculates the fee based on the financial impact the artwork will have on the client's business. If your illustration is going to be the centerpiece of a multimillion-dollar advertising campaign, the fee should reflect the value it brings to that campaign, regardless of whether it took you two days or two weeks to create. This requires deep conversations with the client about their goals, reach, and budget.
B. Average Rate Benchmarks by Industry
While rates vary wildly, having a baseline is helpful. Here is a contextual look at typical rates across different illustration markets:
- Editorial Illustration: Magazines and newspapers have notoriously stagnant budgets. A spot illustration (small graphic) might pay $150 to $350. A half-page illustration usually pays $350 to $700. A full-page illustration ranges from $800 to $1,500, and a cover can command $1,500 to $3,500+. The trade-off for lower pay is often immense creative freedom and high prestige.
- Book Publishing: For middle-grade or YA book covers, standard advances range from $1,500 to $4,000. Fully illustrating a 32-page children's book usually involves an advance against royalties, typically ranging from $8,000 to $20,000+, split over several milestones.
- Advertising and Commercial: This is the most lucrative market. A single illustration for a major brand's social media campaign might start at $2,000. Large-scale advertising usage (billboards, packaging, national print) routinely commands $5,000 to $20,000 or more, heavily dependent on the licensing terms.
- Tabletop and Video Games: Character art or card illustrations for trading card games (like Magic: The Gathering) typically pay $500 to $1,500 per card. Concept art for video games is often salaried or paid on a day rate ($350 - $800/day).
Remember, these are benchmarks, not rules. Always evaluate the client's budget, the complexity of the art, and the scope of the usage rights before quoting a price. Never be afraid to aim high; it's much easier to negotiate down than to negotiate up.
4. Common Billing Mistakes and How to Avoid Them
Even highly talented illustrators can struggle financially if they mismanage the business side of their practice. Billing mistakes often stem from a desire to please the client, a fear of losing the job, or simple inexperience. Recognizing these pitfalls is the first step toward building a resilient, profitable freelance career. Below are the most common—and most damaging—billing errors made by freelance illustrators.
A. Offering Unlimited Free Revisions
This is unequivocally the quickest way to destroy your hourly rate and burn out. When an illustrator promises "unlimited revisions until you are happy," they hand complete control of their time over to the client. A project that was budgeted for 10 hours can easily spiral into 40 hours of minute, endless tweaking. Clients, especially those lacking art direction experience, may constantly second-guess their decisions if there is no financial penalty for changing their minds.
The Solution: Strictly cap revisions in your contract and your initial quote. A professional standard is to include two rounds of minor revisions during the sketch phase and one round of minor color/rendering tweaks on the final art. Your contract must explicitly state: "This quote includes up to two (2) rounds of minor revisions during the sketch phase. Any revisions requested beyond this scope, or major compositional changes requested after sketch approval, will be billed at an hourly rate of $100/hr." When clients know revisions cost money, their feedback miraculously becomes more concise, consolidated, and decisive.
B. Failing to Define the Scope of Work (Scope Creep)
Scope creep occurs when the parameters of a project slowly expand beyond the original agreement without a corresponding increase in budget. It starts innocently: "Could we also get a version with a transparent background?" then becomes "Can we get the main character isolated as a separate file?" and eventually, "Actually, can we turn this vertical poster into a horizontal web banner?" If you agree to these requests without charging for them, you are working for free.
The Solution: Your proposal and final invoice must act as a fortress protecting your time. Detail exactly what is included in the base fee. If a client asks for something outside that list, politely but firmly issue a Change Order. You can say: "I'd be happy to create a horizontal banner version for you! Because that falls outside the original scope of our agreement, I will need to charge an additional $400 for the reformatting and layout work. Shall I send over a revised invoice for that addition?" This asserts your professionalism and protects your profit margin.
C. Doing Spec Work or "Test" Assignments for Free
Many clients, especially startups or self-published authors, will ask an illustrator to do a "quick sketch" or a "test piece" to see if their style is a good fit before signing a contract. This is known as speculative (spec) work, and it is a toxic practice that devalues the entire illustration industry. Your portfolio is the proof of your style and capability. Asking an illustrator to sketch for free is like asking a chef to cook a meal for free to see if you want to hire them for a banquet.
The Solution: Never work for free. If a client insists on a test, offer to do a paid test. "I don't offer unpaid sketches, as my portfolio reflects my consistent style and quality. However, I am happy to do a paid character concept test for a flat fee of $300 before we commit to the full project." Clients who refuse a paid test are generally clients who will be difficult to work with and reluctant to pay fair rates later on.
D. Ignoring Taxes and Overhead in Pricing
When you transition from an employee to a freelancer, you become a business. A mistake early-career illustrators make is looking at a $1,000 project fee, dividing it by the 20 hours it took, and thinking they made $50/hour. They forget that as a freelancer, you must pay self-employment tax, income tax, software subscriptions (Adobe Creative Cloud), hardware depreciation (Wacom Cintiqs, iPads), health insurance, and internet bills. By the time overhead and taxes are subtracted, that $50/hour might actually be $20/hour.
The Solution: When calculating your internal minimum rate, you must factor in all business expenses. A good rule of thumb is to calculate what you want to take home as a salary, add 30% for taxes, add your yearly overhead costs, and divide that by your billable hours (remembering that you spend at least 30% of your time doing unbillable admin work). This will give you a realistic baseline that ensures your freelance business is sustainable long-term.
5. Detailed Worked Examples of Invoicing
Theory is important, but practical application is where illustrators truly learn. Let's look at two detailed, hypothetical worked examples of how to structure an invoice and proposal for different types of illustration jobs. These examples demonstrate how to incorporate deliverables, usage rights, and payment terms into a cohesive professional document.
Example 1: The Editorial Spot Illustration
Client: A national tech magazine.
Brief: A quarter-page spot illustration accompanying an article about cybersecurity.
Invoice / Proposal Breakdown:
- Project Description: 1x Spot illustration (approx. 4x4 inches) for "The Future of Firewalls" article.
- Deliverables: 3 rough thumbnail concepts; 1 final high-resolution RGB JPEG (web) and 1 CMYK TIFF (print).
- Revisions: Includes 1 round of revisions on the chosen sketch. Additional revisions billed at $75/hr.
- Usage Rights Licensed: First North American Serial Rights (FNASR) for print publication, plus 1-year non-exclusive digital rights for the magazine's website and associated social media promotion. All other rights retained by the artist.
- Fee: $450.00 Flat Rate.
- Terms: Due to the fast turnaround (4 days), no upfront deposit is required. Payment Net 30 upon delivery of final files. Late fee of 1.5% per month applies after 30 days.
Analysis: Editorial jobs often move too fast for deposit invoices. The fee is standard for a mid-tier magazine spot. Crucially, the rights are strictly limited to the magazine's immediate needs, allowing the illustrator to resell the image as stock later.
Example 2: The Craft Beer Packaging Design
Client: A regional, mid-sized craft brewery.
Brief: Wrap-around illustration for a new seasonal IPA can, featuring a complex fantasy landscape.
Invoice / Proposal Breakdown:
- Project Description: Full-color, wrap-around illustration for 16oz "Dragon's Breath IPA" can packaging.
- Deliverables:
- Phase 1: 3 thumbnail concepts.
- Phase 2: 1 refined line-art sketch and 2 color comps based on selected thumbnail.
- Phase 3: Final layered PSD file, organized to printer specifications, min. 400 DPI.
- Revisions: Includes 2 rounds of minor revisions during the sketch phase, 1 round on color comps. Major changes after Phase 2 approval billed at $100/hr.
- Usage Rights Licensed: Exclusive, worldwide rights for use on physical product packaging, point-of-sale displays, and digital marketing materials related directly to this specific product, in perpetuity. (Client does NOT own the copyright; merchandise like t-shirts requires a separate license).
- Fee: $3,800.00 Flat Rate.
- Terms: 50% non-refundable deposit ($1,900) required to commence work. 50% balance ($1,900) due Net 15 upon final approval, prior to delivery of the un-watermarked high-res PSD file.
- Kill Fee: 25% if killed before sketches; 50% if killed after sketch approval; 100% if killed after final art delivery.
Analysis: This is a high-value commercial job. The deliverables are staggered, ensuring client buy-in at every stage. The rights are broad enough for the client to sell the beer forever, but restrictive enough that they can't print the art on merchandise without paying the artist more. The 50% upfront protects the artist's significant time investment.
6. Frequently Asked Questions (FAQ) for Freelance Illustrators
Navigating the business of illustration generates a multitude of complex questions. Below, we provide comprehensive, deeply detailed answers to the eight most common and critical questions faced by independent artists today. These answers synthesize legal concepts, industry norms, and practical business strategies.
Q1: What exactly is a "Work for Hire" agreement, and should I sign one?
"Work for Hire" (WFH) is a specific legal provision under U.S. Copyright Law. When you sign a WFH contract, you are legally declaring that the client is the original author of the artwork from the moment of its creation. You retain zero rights. You cannot resell it, you often cannot put it in your portfolio without permission, and the client can alter it, sell it to third parties, or use it on merchandise forever without paying you another cent.
As a general rule, freelance illustrators should actively avoid signing Work for Hire agreements unless the compensation is exceptionally high to offset the total loss of copyright. If a standard license might cost $2,000, a WFH buyout for the same image should cost $6,000 to $10,000+. Many corporate clients default to WFH contracts simply because their lawyers use boilerplate templates. Always push back. Offer to grant them an "Exclusive, perpetual license for specific uses" instead, which gives them everything they practically need while allowing you to retain the underlying copyright.
Q2: How do I handle a client who ghosts me after I send the final invoice?
Ghosting is incredibly frustrating but common. The first step is maintaining a professional paper trail. Send a polite reminder 3 days after the invoice is due. Send a firmer reminder at 15 days past due, mentioning the late fees accruing as per your contract. At 30 days past due, send a formal "Final Notice" letter.
If they still ignore you, you must leverage the fact that you have not granted them the license to use the work until payment is received (assuming you included this vital clause in your contract). If the client is already using the unpaid artwork in public (e.g., on their website or a printed flyer), you can issue a Digital Millennium Copyright Act (DMCA) takedown notice to their web host, or send a Cease and Desist letter. The threat of having their website penalized or facing a copyright infringement lawsuit is usually enough to prompt immediate payment. For larger amounts, small claims court is a viable last resort.
Q3: Should I charge more if the client wants the layered source files (PSD/AI)?
Absolutely, without question. A flattened image (JPEG/TIFF) is a finished product; a layered source file is the raw material and the blueprint. When you hand over a PSD or AI file, you are giving the client the ability to deconstruct your work, alter your colors, extract characters to use in other layouts, and essentially bypass hiring you for future adaptations.
Because providing source files undermines your future earning potential on that intellectual property, it is an industry standard to charge a premium for them. This is often referred to as a "buyout" or a "source file release fee." Depending on the project, this fee should add anywhere from 50% to 150% to the base cost of the illustration. Always protect your process and your future income by delivering flattened files by default.
Q4: How do I politely say no to a budget that is offensively low without burning a bridge?
It is crucial to decline lowball offers professionally, as a client with a tiny budget today might have a massive budget next year. The key is to shift the focus from "your budget is bad" to "here is what I can provide for that budget."
Use the "reduce scope" technique. You might reply: "Thank you so much for thinking of me for this project! My current rate for a fully rendered, full-page illustration with these licensing rights is $1,500. While I cannot accommodate the full scope for your $300 budget, I would love to work with you. For $300, I could provide a polished black-and-white line-art sketch, or license an existing piece from my archive. Let me know if either of those options works!" This shows you are a professional who knows their worth, but you remain open to collaboration within their means.
Q5: Do I need a formal, legally vetted contract for every single small job?
You do not necessarily need a 10-page document drafted by a lawyer for a $200 spot illustration, but you absolutely need *something* in writing that functions as a contract. In the legal world, an email thread where both parties clearly agree to terms is often considered a binding contract.
For smaller jobs, a "Letter of Agreement" or a detailed proposal/invoice signed by the client is sufficient. This document must clearly state the deliverables, the fee, the timeline, the revision policy, and the usage rights. There are many excellent, affordable contract templates available through organizations like the Graphic Artists Guild. Never begin sketching based solely on a vague phone call or a casual DM; always summarize the terms in an email and get the client to reply with "I approve."
Q6: How should I charge for royalties vs. flat fees in book publishing?
In traditional trade publishing (children's books, graphic novels), illustrators are typically paid an "advance against royalties." This means you receive a flat sum upfront (e.g., $10,000) broken into milestones. Once the book is published, you earn a percentage of each sale (usually 3% to 6% of the cover price). However, you don't receive additional royalty checks until your percentage of sales "earns out" (surpasses) that initial $10,000 advance.
If you are working with a self-published author, it is incredibly risky to accept a low flat fee in exchange for high royalties, because the vast majority of self-published books sell fewer than 100 copies. For self-published clients, always insist on a robust flat fee that covers your time completely, treating any potential royalties as a highly unlikely bonus, or simply do the job entirely for a flat rate and grant them the necessary rights to sell the book.
Q7: Can I put commissioned work in my portfolio if the project hasn't been published yet?
Generally, no. When a client hires you to create artwork for an upcoming campaign, product launch, or book release, they rely on the element of surprise for their marketing strategy. Leaking the artwork early on your Instagram or portfolio can damage their campaign and violate Non-Disclosure Agreements (NDAs), which are standard in industries like video games and advertising.
Always ask the client, "When is the public embargo lifted on this artwork?" Make a note in your calendar to hold off on posting until that date. Even after the artwork is public, it is best practice to include a clause in your contract stating: "The Illustrator retains the right to display the commissioned artwork in their portfolio and social media for self-promotional purposes, only after the artwork has been publicly released by the Client."
Q8: What is a "rush fee" and when is it appropriate to apply one?
A rush fee is an additional percentage added to the total project cost when a client demands a turnaround time that is significantly faster than your standard working pace. Rush jobs require you to work evenings, weekends, or push other clients' projects aside to accommodate the tight deadline, and you must be compensated for that stress and disruption.
A standard rush fee is typically +50% to +100% of the base project rate. For example, if your normal turnaround for a $1,000 illustration is two weeks, and the client needs it in three days, you would quote them $1,500 to $2,000. It is crucial to present this clearly as an option: "My standard timeline for this is 14 days at $1,000. I can accommodate your 3-day deadline, but it will require a 50% rush fee, bringing the total to $1,500." This gives the client the choice to either pay for the speed or adjust their timeline.
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Frequently asked questions
Your initial fee should include 1-2 sketch revisions. Your invoice terms should clearly state that revisions requested *after* moving to final color and ink will be billed at your hourly rate.
If you are illustrating a book, you might negotiate an advance plus royalties on book sales. For corporate editorial or advertising illustration, you typically charge a flat fee for specific usage rights, not ongoing royalties.