Partial Payment Invoice: Show Amount Paid and Balance Due

Quick answer: A partial payment invoice shows the invoice total, each amount the client has already paid with its date, and the balance due that remains. Keep the original invoice number, add an "Amount paid" line under the total, show "Balance due" in bold, and restate the due date for the remainder or the agreed installment schedule.

Clients pay in parts for many reasons: a deposit up front, an agreed payment plan, a disputed line held back or simply a short payment. Whatever the reason, your invoice needs to show exactly what has been received and what is still owed, or you will end up chasing the wrong figure. Our free invoice generator has an "Amount already paid" field that subtracts payments from the total and shows the balance due automatically.

What is a partial payment invoice?

A partial payment invoice is any invoice where the amount paid so far is less than the invoice total. Most invoicing tools, including ours, handle it with two extra lines in the totals block: the amount paid and the balance due. The invoice itself, its number, date, line items and tax, stays exactly as issued. It is not a separate legal document type; it is an ordinary invoice that tracks payments against it. You will also see it described as an invoice with balance due, a part-payment invoice or, when the split is planned in advance, an installment invoice.

When clients make partial payments

• Deposits and advances: the client paid a share before work started. See our guide to the deposit invoice.
• Agreed installments: a large bill split into, say, three monthly payments.
• Milestone or progress payments on long projects, covered in interim invoice vs final invoice.
• Short payments: the client paid less than invoiced, sometimes because of bank fees, a deducted discount or a disputed item.
• Cash-flow trouble: the client pays what they can now and promises the rest.

How to show amount paid and balance due on an invoice

The totals block at the bottom of the invoice should read top to bottom like a calculation:

Line	What it shows
Subtotal	Sum of all line items before tax
Discount	Any agreed reduction
Tax	Sales tax, VAT or GST on the taxable amount
Total	The full amount of the invoice
Amount paid	Payments received to date, with dates if there are several
Balance due	Total minus amount paid: the figure the client should pay now

Never change the invoice total to the remaining balance. The total is the value of the sale; changing it would understate your income and confuse anyone reconciling the account.

Partial payment invoice example

A web designer issues invoice INV-1042 for $4,800 (including tax) with Net 30 terms. The client pays $1,500 on 3 September and $1,000 on 1 October.

Date	Entry	Amount	Running balance
20 Aug	Invoice INV-1042 issued	$4,800.00	$4,800.00
3 Sep	Payment received, bank transfer ref 88213	($1,500.00)	$3,300.00
1 Oct	Payment received, card	($1,000.00)	$2,300.00
Balance due			$2,300.00

The arithmetic: $1,500 + $1,000 = $2,500 paid; $4,800 − $2,500 = $2,300 balance due. The updated invoice keeps number INV-1042, shows "Amount paid: $2,500.00 (3 Sep $1,500; 1 Oct $1,000)" and "Balance due: $2,300.00". The original due date was 19 September, so the remaining $2,300 is overdue unless you agreed a new date.

Installment invoice: one invoice or several?

When you agree a payment plan up front, you have two options.

Option 1: one invoice with a payment schedule

Issue a single invoice for the full amount and list the installments in the notes, for example "Payable in 3 installments: $1,600 due 1 Nov, $1,600 due 1 Dec, $1,600 due 1 Jan." Update the amount paid as each arrives. This keeps the sale on one document and works well when the full amount is earned now, such as a finished project the client pays off over time.

Option 2: a separate invoice for each installment

Issue a new invoice, with its own number and due date, for each installment, describing it as "Installment 2 of 3 for Project X". This suits ongoing work, subscriptions and situations where tax should be charged as each part is billed. It also keeps each overdue amount distinct. If the arrangement repeats on a schedule, see recurring invoices.

Factor	One invoice + schedule	Invoice per installment
Tax point	Usually the full amount at issue	Each installment as billed
Tracking overdue amounts	Needs a payment history	Each invoice simply open or paid
Admin	One document to update	Several documents to issue
Best for	Finished work paid off over time	Phased work and long plans

How to handle a short payment

1. Find out why. Compare the payment with the invoice and the client's remittance advice. Bank or transfer fees, an early payment discount taken late, withholding tax or a disputed line are the usual causes.
2. Decide whether the difference is owed. If the client deducted fees your terms say they should cover, ask for the balance. If the deduction is legitimate, issue a credit note for the agreed amount so the invoice can close.
3. Send an updated invoice or statement showing the amount paid and balance due.
4. Follow up on a date. Treat the remaining balance like any other overdue amount.

Send a receipt for each partial payment

Clients often want proof of each payment. A receipt should show the amount received, date, payment method, the invoice number it applies to and the remaining balance. Our payment receipt template guide lists the fields. Clients with several invoices open may prefer a statement of account that lists every invoice and payment together.

Accounting for partial payments

Apply each payment to a specific invoice, not just to the client's account in general, unless the client tells you otherwise and your agreement allows it. Under accrual accounting the full invoice was income when issued, and a payment simply reduces accounts receivable. Under cash accounting, only the amount received counts as income for that period. Our explainer on cash vs accrual accounting shows both methods side by side.

Partial payments and sales tax or VAT

A partial payment does not usually change the tax on the invoice. The tax is calculated on the full invoice total when the invoice is issued, and each payment is treated as paying a share of both the price and the tax. Timing is where it can matter:

• UK VAT, standard accounting: VAT is normally due for the period in which the tax point falls, even if the client has paid only part of the invoice.
• UK VAT Cash Accounting Scheme: eligible businesses account for VAT when payment is received, so a partial payment brings in a proportionate share of the VAT.
• US sales tax: most states expect you to collect and remit tax on the sale, but reporting rules, including whether you can report on a cash basis, vary by state.

If a balance is never paid, many tax systems let you recover the tax through bad debt relief once certain conditions are met. Confirm the rules for your jurisdiction with your accountant before you adjust any return.

How to ask for the remaining balance

Keep the message short, specific and friendly. Name the invoice, the amount received, the balance and a date:

Hi Sam, thanks for your payment of $2,500 towards invoice INV-1042, received on 1 October. The remaining balance is $2,300. I've attached an updated copy of the invoice showing both payments. Could you confirm when the balance will be paid? If it helps, we can split it into two payments of $1,150 on 15 October and 1 November.

Offering a short plan often gets a faster answer than repeating the full demand. For firmer follow-ups, see our payment reminder email templates.

Common mistakes with partial payment invoices

• Editing the invoice total down to the balance instead of adding an amount-paid line.
• Issuing a brand-new invoice for the balance, which double counts the sale.
• Not recording payment dates, so the history cannot be matched to the bank.
• Letting the balance drift without a new agreed due date.
• Calculating late fees on the original total instead of the outstanding balance.

Partial payment invoice checklist

1. Original invoice number and total unchanged.
2. Each payment listed with date and reference.
3. Balance due shown clearly and correctly.
4. Due date or installment schedule for the balance.
5. Receipt sent for each payment if the client wants one.
6. Any write-down handled with a credit note, not an edit.

Next step: update your invoice with the amount paid

Open the invoice generator, load or recreate the original invoice with the same number, type the payments received into "Amount already paid" and add the payment dates to the notes. The PDF will show the total, the amount paid and the balance due. Drafts are saved in your browser, so you can come back to update the same invoice after the next installment arrives.