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A practical walkthrough for billing partial payments upfront, so you protect your time and get paid before the work begins.
10 min read
Published on September 17, 2026
A new client loves your proposal, but you're not thrilled about starting a project with zero money in hand and no guarantee they'll pay when the work is done. That's where an invoice for a deposit comes in: a request for partial payment upfront that protects your time, covers your initial costs, and signals that the client is serious before you commit your schedule. Getting the details right matters, since a poorly labeled deposit invoice can create confusion later when it's time to bill for the remaining balance. This guide walks through exactly how to structure, send, and track a deposit invoice so your billing stays clear from the first payment to the final one. For a broader look at invoicing best practices, check out the complete invoice guide for small businesses.
Below, you'll find step-by-step instructions for setting your deposit amount, itemizing the invoice, labeling it correctly, sending it to your client, and reconciling it against your final bill, plus a rundown of the mistakes that trip up freelancers most often.
Invoice clients and collect payments in one place
A deposit invoice requests a portion of the total project cost upfront, before you start the work. It's a practical way to protect your time and cash flow, especially on custom projects, jobs with high material costs, large engagements with long timelines, or when you're working with a new client you haven't billed before. Asking for a deposit signals that the client is committed and gives you some cushion if the project stalls or scope changes midway through.
A standard invoice bills for completed work and is due on delivery. A deposit invoice bills for a portion of work not yet started, so it should be clearly labeled and reference the total project value. This differs from a proforma invoice, which is a non-binding cost estimate sent before any payment is expected, and from a full prepayment, which covers the entire project cost rather than a partial amount.
Before you invoice anything, settle on a deposit amount and get it documented. Deposit amounts vary, but many freelancers request a portion of the total project cost upfront on standard projects, while smaller jobs or new clients sometimes warrant a full prepayment. The right number depends on project size, material or subcontractor costs you'll front, and how much billing history you have with the client. Write the agreed amount into the contract or proposal first, and spell out due dates and late fees using clear payment terms on invoice wording so nothing gets left to interpretation once you send the invoice.
A percentage-based deposit scales with the project, which works well for larger or custom engagements where costs are harder to predict upfront. A flat-fee deposit is easier to communicate for smaller, well-scoped jobs where you already know your baseline costs.
| Deposit type | Suited for | Example |
|---|---|---|
| Percentage-based (varies by project) | Larger or custom projects | $6,000 project, 30% deposit = $1,800 |
| Flat fee | Smaller, well-defined jobs | $800 flat deposit regardless of total project size |
Once you know your deposit amount, the next step is itemizing it clearly on the invoice itself. List the deposit as its own line item, labeled something like "Deposit - 30% of total project cost," rather than folding it into a vague lump sum. Reference the related proposal or project number so the payment is traceable if you're juggling multiple clients or phases, and if the engagement involves billable hours later on, it helps to know how to invoice for hours worked so your final invoice format stays consistent. Apply sales tax consistently if deposits are taxable where you operate, since tax rules on partial payments vary by jurisdiction.
Give each deposit invoice a naming convention that makes it easy to recognize, like appending "-DEP" to the invoice number (for example, INV-1042-DEP). Add a visible "Deposit Invoice" label near the top of the document, close to the invoice title, so there's no ambiguity when the client or your bookkeeper opens it later. Keep the numbering sequential alongside your regular invoices rather than starting a separate series, since that makes it far easier to match a deposit to its corresponding final invoice when you're reconciling payments at year-end or mid-project.
Invoice clients and collect payments in one place
Once the deposit invoice is ready, send it through whatever channel your client prefers, whether that's email or a client portal, and give them more than one way to pay. Offering a couple of options, like credit card and bank transfer, reduces friction and helps avoid delays caused by a client not having their preferred method on hand. Automated payment reminders before and after the due date can help nudge clients who lose track of the email, so you're not stuck manually following up.
Set the deposit due date before your planned project start date, not on it. This gives the deposit time to clear and keeps you from starting work unpaid if a client pays late.
Once the client pays, mark the deposit invoice as paid in your records promptly so your books reflect an accurate picture of what's outstanding. This matters most if you're juggling several projects at once, since an unmarked deposit can easily get mistaken for an unpaid balance later. If a deposit stalls past its due date, the same habits used for managing and collecting outstanding invoices apply here too: a quick, polite check-in usually resolves it before it becomes a bigger issue.
When the project wraps, credit the deposit against the total rather than billing the full amount again. Double billing a paid deposit is a common way to damage client trust.
The math is simple: total project cost minus the deposit already paid equals the balance due. For a $6,000 project with a $1,800 deposit collected upfront, the final invoice should show a remaining balance of $4,200, with the deposit listed as a credit line so the client can see exactly how the number was calculated.
A few recurring slip-ups can undercut an otherwise solid deposit process. Watch for these before you send your next deposit invoice:
Say a freelance web developer signs a $6,000 project with a new client and wants a 30% deposit before writing a line of code. Building that invoice by hand in a spreadsheet means manually calculating the deposit, labeling it, and remembering to credit it later. Bonsai invoicing handles the structure for you: line itemization lets you list the deposit as its own item tied to the total contract value, so the remaining balance is calculated automatically instead of by hand.
Because an accepted Bonsai proposal generates the invoice directly from the proposal items, the deposit and total project cost stay consistent from the very first document a client sees. A photographer billing a $2,200 wedding package can send a deposit invoice referencing that same proposal, then generate the final invoice later with the deposit already credited, so there's no risk of billing the client twice. Customizable invoice templates also make it easy to add a clear "Deposit Invoice" label and keep numbering consistent with a business's regular invoice series.
Once a deposit invoice goes out, automated payment reminders can help nudge clients who let due dates slip without requiring manual follow-up, and support for credit cards, ACH transfers, and PayPal gives clients more than one way to pay. For a consultant who runs the kickoff call over Zoom before locking in scope, Zoom meeting transcripts can sync to the client's record in Bonsai, so deposit terms discussed on that call are documented alongside the invoice itself. Recurring billing options also come in handy for retainer-style engagements that start with a deposit and continue with scheduled payments after that, keeping the whole billing history in one client record.
To create an invoice for a deposit, start by agreeing on the deposit amount and due date with your client in writing, then generate an invoice that lists the deposit as its own line item rather than folding it into a vague total. Include the client's details, a reference to the related project or proposal, the total contract value, and the remaining balance still owed after the deposit. Label the document clearly as a deposit invoice so it's not mistaken for a final bill.
Most invoicing tools let you itemize a deposit as a percentage or flat fee of the total project cost, which keeps the math transparent for both sides. Numbering the deposit invoice sequentially with your regular invoices, rather than starting a separate series, also makes it easier to match it to the final invoice once the project wraps.
Yes, sending an invoice before starting the work is standard practice when you're requesting a deposit. A deposit invoice bills for a portion of the project upfront, which protects your time and covers initial costs before you commit your schedule to a new engagement.
This is different from invoicing after delivery, which is how most final or milestone invoices work. As long as the deposit amount and terms were agreed on in advance, whether in a contract or a proposal, invoicing before work begins is a normal and expected part of the billing process for freelancers and small agencies.
To invoice for a 50% deposit, calculate half of the total project cost and list that amount as a single line item labeled as a deposit, for example "Deposit - 50% of total project cost." Show the total contract value on the same invoice so the client can see how the deposit fits into the full engagement, along with the remaining balance due later.
For a $4,000 project, a 50% deposit invoice would show $2,000 due now, with the remaining $2,000 to be billed on a separate final invoice once the work is complete. Keeping the total project value visible on both invoices helps avoid confusion about what's already been paid.
Yes, a deposit generally warrants its own invoice separate from the final bill, since combining the two can make it harder to track what's been paid and what's still owed. A dedicated deposit invoice, clearly labeled and numbered, gives both you and the client a clean paper trail from the first payment to project completion.
When the project finishes, the final invoice should reference the deposit already paid and credit it against the total, rather than restating the full project cost. Keeping the two documents separate but linked, through matching project references or sequential invoice numbers, makes reconciliation far simpler at tax time or during a client dispute.
Bonsai helps with invoicing for a deposit by letting you itemize the deposit as its own line tied to the total contract value, so the remaining balance calculates automatically instead of by hand. Customizable invoice templates make it easy to label the document clearly as a deposit invoice and keep numbering consistent with your regular invoice series.
Because an accepted Bonsai proposal can generate the invoice directly from the proposal items, the deposit amount stays consistent with what the client already agreed to. Automated payment reminders and support for credit cards, ACH transfers, and PayPal also help reduce the manual follow-up that often comes with collecting a deposit.
A well-structured deposit invoice does more than get you paid upfront: it sets the tone for a clear, professional billing relationship from the very first document you send. Nail the labeling, the line items, and the crediting step, and the transition to your final invoice becomes routine rather than a scramble. Tools like Bonsai's invoicing features can take some of the manual math and formatting off your plate, so you can focus on the actual project instead of reconciling paperwork.
