Deposits and Stage Payments on a Trade Job: How to Invoice Them So the Final Bill Gets Paid (UK, 2026)

By Daniel Sedgwick, founder and managing director of Checker and a former gas engineer. He writes practical guides for UK trade businesses on field workflows, paperwork and admin.

Updated 23 October 2026

Materials need paying for before a kitchen is finished. A deposit helps, but a transfer marked “kitchen money” doesn’t explain which charge it settles. By the final visit, you need to show the customer what the job cost, what they’ve paid and exactly what’s left.

Keep those figures together from the start. A stage schedule works when each invoice has a clear job reference and each payment closes the right amount. Leaving that reconciliation until the last bill creates an avoidable argument over money already handed over.

How should you set up deposits and stage payments?

Put the payment schedule in the quote before the customer accepts it. Tie each stage to work the customer can recognise, such as first-fix pipework completed, rather than a vague percentage of “progress”.

1. Agree the schedule. Set out the scope, total price, deposit, stage triggers, amounts and payment deadlines in the quote. Keep the customer’s acceptance with the job.
2. Issue each instalment invoice. Use a unique sequential invoice number and the same quote and job references. Describe the deposit or completed stage and apply the correct tax treatment.
3. Record each payment. Allocate the actual receipt to its invoice, including the date and amount. Keep a part-paid invoice open for the unpaid balance.
4. Reconcile the final balance. Check total agreed charges, approved changes, earlier invoices and actual payments. Issue only the remaining uninvoiced charge and identify any earlier unpaid balance separately.

Agree changes to the work and price before adding them to a later stage. Keep the revised scope beside the original quote so a customer can follow the extra charge. Our quote-to-job-and-invoice workflow explains how to keep the original details with the job.

What should a deposit or stage invoice show?

Identify the particular instalment and its amount due, then include the usual invoice details. “Stage two, first-fix plumbing under quote Q26-041” is easier to match to an agreed job than “payment on account”.

GOV.UK’s invoice requirements cover the supplier and customer details, unique number, description, invoice and supply dates, charges, applicable VAT and total owed. A sole trader must include their name; a limited company needs its full registered name.

• References and scope: invoice number, quote number, job address and the deposit or stage being billed.
• Dates: invoice issue date, relevant supply or tax-point date, and a clear payment deadline matching the agreed terms.
• VAT particulars: your VAT number, quantity or extent of services, unit price, net charge, VAT rate, VAT amount in sterling and any applicable cash discount. Include the supplier and customer names and addresses.
• Payment instructions: the amount to pay now, the reference to use and the agreed payment method.

The full VAT particulars are in VAT Notice 700, section 16.3. Sending a PDF doesn’t relax them: HMRC’s electronic-invoicing guidance requires the same information as a paper invoice.

If you aren’t VAT registered, don’t add VAT to the deposit or any later charge. HMRC requires registration before you charge VAT. You can still use the same deposit, stage and balance sequence.

When does VAT become due on the deposit?

For an advance payment, the tax point is normally the earlier of receiving the money or issuing a VAT invoice. It applies to the amount received or invoiced. HMRC’s deposit guidance explains why VAT doesn’t simply wait until the job ends.

Does sending the invoice before payment matter?

Yes. Under normal VAT accounting, an advance VAT invoice can create a tax point while it’s still unpaid. Record the tax-point date separately from the payment deadline, because the two dates do different jobs.

Building work with a contract providing for stage payments has a specific rule: payment or VAT invoice, whichever happens first. VAT Notice 708, section 23 distinguishes these contracts from single-payment jobs. Don’t apply a completion-date shortcut to every installation.

Does a pro-forma or cash accounting change that?

A pro-forma is a request for payment and isn’t a VAT invoice. The pro-forma rules in Notice 700, section 17.3 say it must be marked accordingly and cannot support a customer’s VAT reclaim; following payment or supply, issue the proper VAT invoice.

Receiving the advance still matters even if the request was a pro-forma. Separately, businesses using the VAT Cash Accounting Scheme account for sales VAT when customers pay. Check which accounting method you actually use before deciding the VAT period.

How would three invoices work on a £7,200 job?

A £7,200 kitchen plumbing installation can be split into a £2,160 deposit, £2,880 first-fix payment and £2,160 final charge. The customer gets three instalment invoices, each charging only its own share.

The agreed 30%, 40%, 30% schedule gives £6,000 × 20% = £1,200 VAT and a £7,200 total. Reduced or zero rates need their own eligibility checks; a domestic address alone doesn’t decide the rate.

Assume the deposit arrives on 28 October and first-fix payment on 10 November. Their tax points are still 26 October and 9 November, when the VAT invoices were issued. The completion invoice creates its tax point on 23 November even though its agreed due date is 27 November.

What wording can you adapt for each invoice?

Use the shared identity, date and VAT fields above on all three invoices. These sample descriptions and payment notes keep the instalments tied to quote Q26-041 and job K26-017.

The reconciliation on the last invoice explains the job total. Its taxable charge remains £1,800 plus £360 VAT. Adding £1,200 VAT for the whole contract again would duplicate the £840 already charged on the first two invoices.

How do you keep the final bill accurate?

Reconcile what was invoiced separately from what was paid. A deposit invoice doesn’t prove the deposit arrived, and an overdue stage charge mustn’t disappear into a newly numbered invoice for the same work.

In the example, £7,200 less £5,040 received leaves £2,160 due. If first fix hadn’t been paid, the account would instead show £2,880 outstanding on INV-1042 plus £2,160 on INV-1043: £5,040 altogether. The new invoice still charges only completion.

• Match receipts to invoice numbers, including part-payments.
• Show earlier invoices and payments in the closing reconciliation.
• Keep approved changes and any credit notes traceable.
• Chase an existing unpaid invoice under its original number.

Retain the invoices and payment evidence together. HMRC’s VAT record rules cover invoices, credit notes and general business records such as bank statements. A bank entry shows money moved; the invoice explains the charge it settled.

How can software keep the stages together?

Keep every invoice and receipt against the same job so you can see which instalments remain unpaid. In Checker, we support deposit requests, staged payments and part-paid tracking, with payment links and VAT, CIS and DRC invoice treatments. Our invoice chasers follow overdue payment terms and stop when the invoice is marked paid.

On PRO and PRO+, we sync invoices and payments both ways with Xero; you need a separate Xero subscription. Try the three-invoice example before moving a live job across, and check the PDFs, payment allocation and account balances.

If your main contractor operates self-billing, uses authenticated receipts or requires valuations and retentions, agree that document route with their accounts team first. A normal instalment invoice can duplicate their document. We don’t decide which tax or contract procedure applies to your job.

Do CIS or the reverse charge change the schedule?

CIS and the domestic reverse charge can change deductions and VAT presentation, even though you still need a clear stage schedule. The private-homeowner example above doesn’t use either treatment.

For subcontract work, HMRC’s CIS calculation excludes VAT and qualifying directly purchased materials from the deduction base. Don’t simply take 20% off every gross instalment. Reconcile a deduction against the contractor’s payment-and-deduction statement.

The construction reverse-charge tests concern the supply and the customer’s VAT/CIS position, including written end-user notifications. Where it applies, the customer accounts for VAT rather than paying that VAT to you. CIS status alone doesn’t settle the question. Use our UK trade invoicing guide to VAT, CIS and the domestic reverse charge to check the treatment before sending the first deposit request.

What else should you know about stage invoices?

Authoritative sources

1. HMRC: VAT on instalments, deposits and advance payments
2. HMRC: VAT Notice 700, invoice particulars and pro-formas
3. HMRC: VAT Notice 708, construction tax points
4. GOV.UK: what invoices must include
5. GOV.UK: current VAT rates
6. GOV.UK: VAT Cash Accounting Scheme
7. HMRC: keeping VAT records
8. HMRC: construction domestic reverse-charge supplier checks
9. HMRC: CIS deductions and subcontractor payments
10. HMRC: electronic-invoicing requirements
11. HMRC: charging and calculating VAT
12. Checker: quotes, deposit requests and staged payments
13. Checker: Xero invoice and payment integration
14. Checker: invoice-chaser automations