Asking a client to pay a deposit before work begins is one of the most effective ways to protect your cash flow and ensure client commitment. But a deposit is not just an informal arrangement — it should be documented with a proper deposit invoice, also called a down payment invoice or advance invoice. Without one, you have no paper trail and no clear reference point for the final billing.
This guide explains when to use a deposit invoice, what it must contain, and how to reconcile it with the final invoice when the project closes.
What is a deposit invoice?
A deposit invoice is a legally valid invoice issued before or at the start of a project, requesting partial payment in advance. It covers a portion of the total project value — typically 30%, 50%, or the full first instalment of a staged payment schedule.
It is not a pro forma invoice (which has no accounting value) and not a quote (which proposes a price but requests no payment). A deposit invoice is a real invoice that triggers a payment obligation.
When the project is complete, you issue a final invoice that shows the original total, deducts the deposit already paid, and requests the remaining balance.
When should you issue a deposit invoice?
Deposit invoices are particularly useful in the following situations:
- Large or long projects where significant upfront effort is required before any deliverable is produced
- New clients with whom you have no established payment history
- Custom or bespoke work that cannot be resold if the client cancels
- Projects with high material or subcontracting costs that you need to cover before delivery
- Staged payment structures where you want to invoice at defined milestones
A deposit also signals commitment. Clients who pay upfront have skin in the game. The deposit conversation surfaces payment hesitation before work starts — not after.
What a deposit invoice must contain
A deposit invoice follows the same legal requirements as any standard invoice. At minimum it must include:
| Field | Example | | -------------------- | ------------------------------------------------- | | Invoice number | DEP-2026-011 (dedicated deposit series) | | Issue date | 15 May 2026 | | Supplier details | Your name/business, address, tax registration | | Client details | Billing name and address | | Description | "Deposit — website redesign project (50% of total fee)" | | Deposit amount | £2,000 (excl. VAT) | | VAT | £400 (20%) | | Total due | £2,400 | | Payment due date | 22 May 2026 | | Reference to project | "Advance payment for project as per quote REF-2026-009" | | Payment method | Bank transfer, IBAN/sort code |
The description must be explicit. Write "Deposit — 50% of total fee of £4,000" rather than just "Advance payment." This makes the final reconciliation unambiguous.
Deposit invoice numbering
You can handle numbering in two ways:
-
Separate deposit series: use a dedicated prefix like
DEP-orADVANCE-(e.g.,DEP-2026-011). The final invoice then uses your standard series (INV-2026-047). This is cleaner and makes it easy to distinguish advance invoices in your records. -
Single unified sequence: the deposit invoice uses the same running series as all other invoices. Simpler to maintain, but visually less distinct.
Either method is valid. The critical requirement is that every invoice number is unique and the sequence is unbroken across all your invoices.
VAT on deposit invoices
VAT treatment for deposits depends on your jurisdiction.
United Kingdom
In the UK, a deposit triggers a tax point at the earlier of:
- the date the deposit payment is received, or
- the date the deposit invoice is issued
This means VAT becomes due on the deposit amount at the time of invoicing (or receipt) — not at final delivery. If you are VAT-registered and issue a deposit invoice for £2,000 + 20% VAT, you owe HMRC £400 at the time the deposit is collected, not at the end of the project.
European Union
Similar principles apply across EU member states. The deposit invoice triggers a VAT obligation at the time of issue if the amount is certain and the delivery is sufficiently defined.
United States
No federal sales tax applies to most service invoices. If you operate in a state that taxes services, check whether deposit invoices trigger sales tax obligations at the time of payment.
Practical implication
Because deposit invoices accelerate the VAT tax point, it is important not to use them casually for administrative convenience. Issue a deposit invoice when you genuinely intend to collect a payment — not as a placeholder before the contract is confirmed.
How to write the final invoice (reconciling the deposit)
When the project completes, your final invoice should clearly show:
- The total project fee
- The deposit previously invoiced and paid
- The outstanding balance due
Example final invoice layout:
| Item | Amount | | --------------------------------------- | ---------- | | Website redesign — full project fee | £4,000.00 | | Less: Deposit paid (Invoice DEP-2026-011) | −£2,000.00 | | Balance due | £2,000.00 | | VAT on balance (20%) | £400.00 | | Total due | £2,400.00 |
Note: if you already charged VAT on the deposit invoice, only charge VAT on the remaining balance in the final invoice — not on the total project fee again. Double-charging VAT on the deposit is one of the most common mistakes freelancers make when reconciling staged invoices.
Multi-stage payment schedules
Deposit invoices work well for simple 50/50 splits. For larger projects with milestone-based billing, the structure might be:
- Invoice 1 (Deposit): 30% on project start
- Invoice 2 (Milestone): 40% on delivery of first phase
- Invoice 3 (Final): 30% on final delivery and sign-off
Each invoice in this sequence is a standalone document with its own number and due date. The final invoice shows the total project value and deducts all previous payments.
What happens if the project is cancelled?
The deposit invoice determines whether a deposit is refundable. If your contract or terms of business specify that the deposit is non-refundable, the deposit invoice stands even if the project does not proceed. If the deposit is refundable under certain conditions, you may need to issue a credit note against the deposit invoice.
This is worth clarifying in your initial contract — before you issue the deposit invoice — so both parties understand the terms from the start.
Deposit invoice vs pro forma invoice
A pro forma invoice is a preliminary document that looks like an invoice but carries no legal or accounting weight. It is used to provide pricing estimates, facilitate customs procedures, or demonstrate what an invoice will look like. It does not create a payment obligation.
A deposit invoice is a real invoice. It creates a legal payment obligation and a VAT event. It appears in your accounts as a receivable. Do not confuse the two — using a pro forma invoice when you actually intend to collect a deposit means the deposit lacks proper documentation.
Practical tips for using deposit invoices
- Agree the deposit amount before starting — do not start work and invoice retrospectively for an advance
- Specify what work begins on deposit receipt — this protects both parties and avoids scope disputes
- Send the deposit invoice with the signed contract — the two documents together define the engagement clearly
- Chase promptly if the deposit is not paid — a client who delays the deposit is likely to delay every payment. Use the invoice payment terms guide to understand your enforcement options
Create deposit invoices with Invoice Creator
Invoice Creator lets you generate a clear, professional deposit invoice PDF in minutes, with all required fields, your own branding, and the correct VAT breakdown. When it is time to issue the final invoice, simply reference the original deposit and calculate the balance.
For a broader overview of invoice structure, see the freelance invoice template guide, which covers all the fields every freelancer should include in any invoice.