A free invoice template that fills itself

Send the order. Get the invoice. You send quantities, prices, discounts and VAT rates. CastPDF works out every line and the total, and hands back a finished PDF with your logo.

Making them from your own data? Read the invoice PDF API guide.

A4, portrait
2 pages in the sample
Free to start

Use this template See the data it needs

What this invoice template is for

This template turns order or project data into a clean, professional invoice. It suits freelancers, design studios, agencies and software businesses that bill customers every month.

You send the quantities, prices, any discount and the VAT rate of each line. The template works out every line, shows the VAT for each rate and prints the total due.

What a good invoice includes

A unique invoice number, so you and your customer can refer to it.
The date of issue and the date payment is due.
Your details and your customer’s: names, addresses and contacts.
Each line item, with the quantity and the price.
Any discount, shown on its line, and the tax for each rate, shown apart from the subtotal.
The total due, and clear instructions on how to pay.
Your tax or company number, where the law asks for one.

The data

The fields it fills

Each field fills one part of your invoice. Send new details and your invoice keeps its design, or change both.

Fields of the invoice template and what each one fills
Field	What it fills
General
`currency`	Currency for every amount, such as EUR or USD.
`locale`	How numbers and dates are written, such as en-IE or de-DE.
Seller
`seller.name`	Your business name (your brand settings win).
`seller.initials`	The letters in the logo mark, when you have no logo.
`seller.tagline`	A short line under your name.
`seller.address`	Your address, one line per line.
`seller.email`	Your billing email address.
`seller.tax_id`	Your VAT or tax number.
Customer
`customer.name`	The customer’s business name.
`customer.contact`	The person the invoice is for (optional).
`customer.address`	The customer’s address, one line per line.
`customer.tax_id`	The customer’s VAT number (optional).
Invoice
`invoice.number`	The invoice number.
`invoice.issued`	The date of issue.
`invoice.due`	The date payment is due.
`invoice.reference`	The customer’s order or purchase order number (optional).
`invoice.notes`	A note to the customer.
`invoice.terms`	Your payment terms.
Payment
`payment.bank`	Your bank’s name.
`payment.account_name`	The name on your bank account.
`payment.iban`	Your IBAN.
`payment.bic`	Your bank’s BIC (SWIFT) code.
Items
`items[].description`	What you sold, one line each.
`items[].detail`	A short note under the line (optional).
`items[].quantity`	How many.
`items[].unit`	The unit, such as days or hrs (optional).
`items[].unit_price`	The price of one unit, before VAT.
`items[].vat_rate`	The VAT or sales tax rate of the line, in percent.
`items[].discount`	A discount on the line, in percent (optional).

How to use it

How to make your invoice PDF

Two ways to get your invoice. Make one by hand in the dashboard today. Connect your app when you want every invoice made automatically.

No code: make it in the dashboard

1Sign up free. You don’t need a card.
2Pick the invoice template.
3Put your own details into the invoice’s sample data, and change the words and colours.
4Watch the free preview as you type. Every page carries a small “Preview” label.
5Verify your email and press Generate PDF for a clean copy. It counts as one PDF on your plan.

To make each invoice from your own app instead, send your data with a live key, as shown here.

Automatic: one request from your app

Copy the template ID from the editor. Save your invoice data in a file with that ID, then send it in one request. The reply is the finished PDF.

curl

curl https://api.castpdf.com/v1/pdf \
  -H "Authorization: Bearer $CASTPDF_API_KEY" \
  -H "Content-Type: application/json" \
  -d @request.json \
  --output invoice.pdf

request.json (the sample data)

{
  "template_id": "YOUR_TEMPLATE_ID",
  "data": {
    "currency": "EUR",
    "locale": "en-IE",
    "seller": {
      "name": "Halden & Moss Studio B.V.",
      "initials": "HM",
      "tagline": "Brand and packaging design",
      "address": "Keizersgracht 218\n1016 DZ Amsterdam\nThe Netherlands",
      "email": "[email protected]",
      "tax_id": "NL859371640B01"
    },
    "customer": {
      "name": "Brightwater Coffee Co. Ltd",
      "contact": "Priya Raman",
      "address": "14 Merchants Quay\nDublin D08 X2Y4\nIreland",
      "tax_id": "IE6388047V"
    },
    "invoice": {
      "number": "INV-2026-0142",
      "issued": "2026-09-30",
      "due": "2026-10-30",
      "reference": "PO BW-7731",
      "notes": "Thank you for working with us on the autumn range. Questions about this invoice? Reply to [email protected].",
      "terms": "Payment due within 30 days. EU B2B services: VAT is charged at the Dutch rates shown; reverse charge applies where your VAT ID qualifies."
    },
    "payment": {
      "bank": "Harbourline Bank N.V.",
      "account_name": "Halden & Moss Studio B.V.",
      "iban": "NL91 ABNA 0417 1643 00",
      "bic": "ABNANL2A"
    },
    "items": [
      {
        "description": "Brand strategy workshop",
        "detail": "Half-day session with your leadership team, notes and summary deck",
        "quantity": 1,
        "unit": "",
        "unit_price": 2400,
        "vat_rate": 21
      },
      {
        "description": "Brand identity refresh",
        "detail": "Logo refinement, colour palette and typography system",
        "discount": 10,
        "quantity": 1,
        "unit": "",
        "unit_price": 6400,
        "vat_rate": 21
      },
      {
        "description": "Logo lockups and clear-space rules",
        "quantity": 1,
        "unit": "",
        "unit_price": 950,
        "vat_rate": 21
      },
      {
        "description": "Packaging design: single origin bags",
        "detail": "Three bag designs for the autumn single-origin range",
        "quantity": 3,
        "unit": "",
        "unit_price": 1850,
        "vat_rate": 21
      }
    ]
  }
}

The full sample has 25 lines. Four are shown here to keep it short.

Read the quickstart

Make it yours

Add your logo, brand colour, font and company details once in the brand settings. Every template uses them.
Leave out what you do not need: a line without a discount or detail simply skips it.
Switch from A4 to US Letter in the template settings. The layout fits both.
Every save is a new version, and your last 50 versions are kept.

Long invoices, handled

Long invoices are handled for you. On a second page the table header repeats, no line is split in two, and every page says "Page X of Y".

The totals and payment details form one block. It stays together on one page where possible, so a total never sits alone.

FAQ

Questions about invoice PDFs

What should an invoice include?

At least a unique number, the dates, your details and your customer’s, what you sold with prices, any tax, and the total due. Many countries also ask for your tax number. This template has a place for each of them.

How do I number invoices automatically?

Your own system keeps the count and sends the next number with each invoice, such as INV-2026-0142. CastPDF prints the number you send. That keeps the sequence in one place: your records and your PDFs always agree.

Can I create an invoice PDF from JSON data?

Yes. JSON is a common text format that apps use for data. Send your invoice data in that format with one request, and the PDF comes back. The sample data on this page shows the exact shape the template expects.

Can I create an invoice PDF without coding?

Yes. Pick this template, type your details into the sample data and press Generate PDF in the dashboard. To send invoices automatically, your app or any tool that can send a web request calls CastPDF once per invoice.

Can I add my logo and change the colours?

Yes. Upload your logo and pick your colours and font in the brand settings, with no code.

What if an invoice has more items than fit on one page?

The invoice runs onto a second page. The table header repeats, the totals stay together and the pages are numbered. The 25-line sample shows it.

Is a PDF invoice valid for tax purposes?

In many countries, yes, as long as it has the details local rules require. Rules differ, so check with your accountant. This is general information, not tax or legal advice.

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Make your first invoice PDF

Sign up free and this template is ready for you. Add your logo and details, and download your first invoice in minutes. You get 100 free PDFs every month, and you don’t need a card.

Use this template Read the docs