Client Contract Templates: Clauses That Get You Paid

Most client contract templates are built around legal risk: liability, confidentiality, disputes. Those matter, but the clauses that decide whether you get paid on time are the money clauses. Those are the payment schedule, the due date, what happens when a payment is late, what the client owes if they cancel, and when they get ownership of the work. This guide covers those clauses in order, with sample wording you can adapt. It finishes with a worked $8,000 project that shows how the contract turns into invoices, including a cancellation.

Last reviewed: October 27, 2026. Laws cited were accessed on that date. Scope: business-to-business service contracts with US clients, with New York and Illinois freelance rules as examples. Consumer contracts, construction, employment and non-US law are not covered. The sample wording is a starting point, not legal advice; have a lawyer licensed in your state review your template before you use it.

Which contract clauses drive your invoices?

Seven clauses decide what you can bill and when. The rest of a services agreement protects you, but these are the ones your invoices quote.

Other clauses that belong in the template but rarely touch an invoice: confidentiality, data protection, warranties, limitation of liability, governing law and disputes, and your independent contractor status. A lawyer can tune those to your field and state.

How should payment terms and the schedule be written?

State a number of days and the event that starts the clock. "Payment due within 15 days of the invoice date" is clear. "Payment due on completion" invites a dispute about what completion means. Then say when each invoice will be issued.

Sample wording:

Fees and payment. Client will pay a fixed fee of $8,000 in three instalments: $3,200 on signing, $2,400 on Client's written approval of the design (SOW §2.2) and $2,400 on launch (SOW §2.3). Provider will invoice each instalment when it falls due. Each invoice is payable in US dollars within 15 days of its date.

A specific date also protects you in two states. In New York, if a contract with a freelance worker sets no payment date, payment is due no later than 30 days after the work is completed (GBL §1411). Illinois sets the same 30-day default (Illinois Department of Labor). Milestone billing gets you paid sooner than that. Our Net 30 payment terms guide compares common terms, and clients who push for Net 60 are a reason to settle the terms before you sign.

How do you write a late-payment clause that holds up?

Agree on it before any work starts, set a rate, and add a cap for state law. There is no single US limit on late fees between businesses. Texas, California, New York and Florida each set different numbers for different situations, as our late fee laws by state guide shows from the statutes. A rate your client never agreed to is hard to collect.

Sample wording:

Late payment. Any amount not paid by its due date accrues simple interest at 1% per month (12% per year) from the due date until paid, or the maximum rate permitted by applicable law if lower.

Why 1% a month in the sample? Because it sits below the New York civil usury ceiling (16% a year) and the Florida usury line (18% a year simple interest) cited in that guide. Pick your own rate with your lawyer. On a $2,400 instalment paid 40 days late, 12% a year comes to $2,400 × 0.12 × 40 ÷ 365 = $31.56. The late fee calculator runs the same simple-interest formula in your browser.

What is a kill fee and how should you word one?

A kill fee is the amount a client agrees to pay if they cancel a project before it is finished. It is a contract term, not something set by statute. You and the client choose the number. A useful clause covers three things: payment for work already done, a fee for the reserved time you lose, and what happens to the work in progress.

Sample wording:

Termination and kill fee. Either party may end this agreement with 7 days' written notice. If Client ends it before launch, Client will pay (a) all instalments already due, and (b) a cancellation fee of 25% of the fixed fee not yet invoiced. Provider will deliver the work completed to the date of termination after payment.

Keep the fee proportionate to what cancellation actually costs you, such as turned-down work and time you can't fill. Penalty rules differ by state, and California, for example, applies a reasonableness test to liquidated damages (Civil Code §1671). The 25% in the sample is an illustration, not a benchmark.

How does "IP transfers on payment" actually work?

Copyright starts with the creator. For a freelancer, that is usually you, and it moves to the client only by a signed writing. US copyright law says a transfer of copyright ownership "is not valid unless an instrument of conveyance, or a note or memorandum of the transfer, is in writing and signed by the owner of the rights conveyed" (17 U.S.C. §204(a)). Two consequences for your template:

• The condition must be in the signed contract. Write the assignment so it takes effect on full payment. Your invoice can remind the client of it, but an invoice note alone is not the signed transfer.
• "Work made for hire" is narrower than many templates assume. For a work by a non-employee, the label only applies if the work falls into one of nine listed categories (such as a contribution to a collective work, part of an audiovisual work, a translation or a compilation) and both parties sign a written agreement saying so (17 U.S.C. §101). Many freelance deliverables, such as a logo or a set of brand guidelines, do not clearly fit those categories. That is why templates often use an assignment as well. Ask a lawyer which applies to your work.

Sample wording:

Intellectual property. On Provider's receipt of all amounts due under this agreement, Provider assigns to Client all copyright in the final deliverables. Until then, Client has a limited licence to review the deliverables for this project only. Provider keeps ownership of pre-existing materials, tools and unused concepts, and third-party assets (fonts, stock images) are licensed under their own terms.

This is also your strongest collection lever. A client who wants to own the work has a reason to pay the last invoice.

Change orders: how do you get extra work approved and billed?

Require a written change order, with a price and a new date, before any extra work starts. Without one, extra requests become unpaid favours.

Changes. Requests outside the Scope of Work require a written change order, signed or approved by email by both parties, stating the added work, fee and revised timeline. Approved change orders are invoiced with the next instalment.

Bill each approved change as its own line, quoting the change order number. Scope creep prevention and invoicing for scope creep cover the conversation and the invoice in more detail.

Do New York and Illinois require a written freelance contract?

Yes, above set thresholds, and the contract has to include specific items:

Sources: NY GBL §1410 (definitions and exclusions, which include attorneys, licensed medical professionals and construction contractors), §1411 and §1412. Illinois figures are from the Illinois Department of Labor page, read via an Internet Archive copy because the live site didn't respond.

Both state model contracts are free and written for these requirements, so they are a sensible base if your clients are in those states. Our client communication tips explain how to raise the contract with a client without it feeling like a demand.

Worked example: an $8,000 website project from contract to invoices

A hypothetical web designer in New York signs a contract with an Illinois client, using the sample clauses above: $8,000 fixed fee, 15-day terms, 1% a month late interest, a 25% kill fee and IP assignment on full payment.

The client owes $3,031.56 after cancelling, on top of the $3,200 already paid. Under the IP clause, once everything due is paid, copyright in the approved design passes to the client. Until then they have only the review licence. A note on INV-0043 such as "Copyright in the approved design transfers on receipt of full payment under Contract §9" points the client back to the signed term.

Two practical points the table shows. The cancellation fee was charged only on the unbilled $2,400, because instalment 2 was already invoiced. And interest was billed on its own invoice with the calculation written out, so the client can check it.

What can InvoiceQuickly do with your contract terms?

InvoiceQuickly handles the invoices, not the contract. It has no contract templates, no e-signature feature and no automatic late fees. What it does:

• Every invoice has notes and terms fields (up to 5,000 characters each) for your payment terms, the late-payment wording and references such as "Contract §3". Default payment terms are 30 days and can be changed in settings.
• Partial payments can be recorded on any plan, and the balance updates.
• Late charges are added by hand as a line item on a new invoice. InvoiceQuickly doesn't calculate or add them.
• On Pro ($9/month), you can send estimates that the client accepts or rejects in their private portal, then convert an accepted estimate to an invoice. Accepting an estimate in the portal is not a signature on your contract. Pro also adds email delivery, Stripe or PayPal payment links on your own account, and scheduled payment reminders.
• Deposits have no dedicated feature. Issue an ordinary invoice for the deposit amount, as our deposit invoicing guide describes.

Our invoice field checklist covers what each invoice should show. The free quote template is a reference layout for the proposal stage. If you are deciding between templates and software, the cost of manual invoice processing helps you compare the time each takes.

When is a contract template not enough?

A template is a starting point. It is not enough in these cases:

• The client sends their own paper. Large clients' templates often set Net 60 or longer terms, claim all IP on creation, and put no cap on your liability. Mark up the payment, IP and termination clauses before you sign.
• The work is regulated or high-risk. Health data, financial services, construction and legal work have their own rules. New York's law, for example, excludes construction contractors and attorneys from its definition of freelance worker.
• The client is abroad. Governing law, currency and late-payment rules change. The UK and EU have statutory late-payment interest that our late fee calculator explains.
• The contract is large or long-term. A master services agreement with a statement of work per project, or a retainer agreement, may fit better than a one-off template. For monthly work, recurring invoices keep the billing in step with the agreement.

Frequently asked questions

What should a client contract template for a service business include?

At minimum: scope of work with exclusions, fees and the payment schedule, payment terms with a due date, a late-payment clause, termination and kill fee, change orders and IP ownership. Then add confidentiality, liability limits, governing law and independent-contractor status. New York and Illinois also require specific items for freelance contracts above $800 and $500 in 120 days.

Can I charge a late fee if it isn't in the contract?

It is hard to justify a fee the client never agreed to. Some states apply a default interest rate when nothing was agreed, such as 6% a year in Texas from the 30th day after the due date. Agree a rate in writing before work starts, then repeat it on every invoice.

Is a kill fee legally enforceable?

A kill fee is a contract term, so it depends on the agreement and on the state's rules for penalties and liquidated damages. A fee that reflects the real cost of cancellation is easier to defend than one that looks like a penalty. California, for example, applies a reasonableness test.

When does a client own the work I create for them?

Under US copyright law, you generally own what you create as a freelancer until you transfer it. A transfer of ownership must be in a writing signed by you. The commissioned "work made for hire" route applies only to nine listed categories with a written agreement signed by both parties. Contracts often assign copyright to the client once the final payment is made.

Are electronically signed contracts valid in the US?

Generally yes. The federal ESIGN Act says a contract relating to interstate or foreign commerce may not be denied legal effect solely because an electronic signature or electronic record was used to form it (15 U.S.C. §7001). The Act has exceptions and consumer-disclosure conditions. InvoiceQuickly does not provide e-signatures, so use a separate signing tool or a signed PDF.

How long should I keep signed client contracts?

At least as long as you keep the tax records they support. The IRS's general period is 3 years, rising to 7 years if you claim a bad debt deduction (IRS record keeping). In New York, the hiring party must keep a freelance contract for at least 6 years, so keeping your copy for that long is reasonable.

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Once the contract is signed, send invoices that match it. Start free with InvoiceQuickly, see how to handle unpaid invoices if a client goes quiet, or browse more guides on the InvoiceQuickly blog.