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Outilix: all your free online tools, one click away, with Kroma the chameleon

Invoice and quote maker for freelancers and small businesses

Kroma

An invoice is a bill that lists what you sold, the price of each item, any sales tax, the total, the due date and how to pay. This generator numbers your invoice or quote, calculates each line and the total to the cent, adds optional sales tax and exports a clean PDF.

  • ✅ Free
  • 🔒 No sign-up
  • 📱 Works on mobile
  • ⚡ Instant results

Design for free with a full preview. Clean, watermark-free download: $3.99, one-time payment, no account.

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Template only, not legal or tax advice. Sales tax rules vary by state and by product: confirm the right rate and what is taxable with your state revenue department or an accountant.

🔒 Everything runs in your browser. Your data and files never leave your device.

What every invoice should include

US law does not set one invoice format, but a clear invoice gets paid faster and holds up for taxes and disputes. Include:

  • the word Invoice, a unique invoice number and the issue date;
  • your business name and address, and the same details for the client;
  • each item with a description, quantity and unit price;
  • the subtotal, any sales tax and the total;
  • the due date, payment instructions and any late fee.

How sales tax and totals are calculated

\[ \begin{gathered} \text{line amount} = \text{quantity} \times \text{unit price} \\ \text{sales tax} = \dfrac{\text{taxable amount} \times \text{rate}}{100} ,\ \text{rounded to the cent} \\ \text{total} = \text{subtotal} + \text{sales tax} - \text{amount already paid} \end{gathered} \]

Each line is rounded to the cent and the totals add the rounded lines, so the numbers on the page always add up. Tick « Taxable » only on lines that are taxed: services are often exempt, while physical goods usually are not, and rules differ by state.

Common payment terms

TermMeaning
Due on receiptPay as soon as you get the invoice
Net 15Pay within 15 days of the invoice date
Net 30Pay within 30 days, the most common term
Net 60Pay within 60 days, often large clients

The due date is calculated for you from the issue date and the term you pick.

Quote or estimate before you invoice

A quote tells the client the price before the work starts. It shows a validity date, an estimated timeline and a space to sign and accept. Once accepted, copy the same line items into an invoice and switch the document type: the layout, totals and numbering stay consistent.

3 real-life examples

1

Freelance design invoice with no sales tax

Three days at $450.00 each give a total of $1,350.00. With « No sales tax » and Net 30 from October 30, 2026, the invoice is due November 29, 2026.

2

Invoice with sales tax on goods only

Taxable item: 20 mugs at \( \$6.50 = \$130.00 \). Non-taxable setup fee: $50.00. At 8.25% sales tax on $130.00, the tax is $10.73. Subtotal $180.00, tax $10.73, total $190.73.

3

Quote with a deposit

A $2,400.00 website quote with 30% deposit received up front: enter $720.00 as already paid and the balance due is $1,680.00.

Frequently asked questions

How do I make an invoice for free?
Fill in your details, your client and the line items. The live preview is free, the totals calculate themselves, and you pay only to download the clean PDF without the watermark.
What should an invoice number look like?
Any unique, increasing sequence works, such as INV-2026-001, INV-2026-002. Never reuse a number, so every invoice is easy to find for taxes.
Do I need to charge sales tax on an invoice?
It depends on your state and on what you sell. Many states tax physical goods but not all services. Check with your state revenue department or an accountant, then tick the taxable lines.
What is the difference between an invoice and a quote?
A quote is an offer sent before the work, and it can be accepted or declined. An invoice is a request for payment sent after the work or delivery.
Can I charge late fees?
Yes, if you state the fee on the invoice or in your contract in advance. Some states cap interest rates, so keep the fee reasonable and write it clearly in the late fee field.

How we calculate

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