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Invoice Template – Free Download 2026

Download a professional invoice template template. Customizable for all 50 states, available in PDF and DOCX formats. Attorney-verified and ready to use.

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When Do You Need a Invoice Template?

You are a freelancer, independent contractor, or small business owner and need to send a professional invoice to a client requesting payment for goods delivered or services rendered. A structured invoice ensures you get paid on time and creates an accounts receivable record for your bookkeeping.

Your client or customer requires a formal invoice with specific details such as an invoice number, itemized line items, net payment terms, and tax calculations before they can process your payment through their accounts payable department.

You are starting a new business and need a reusable invoice format that looks professional, includes all legally required information, and helps you track which clients have paid and which have outstanding balances.

A government agency or large corporation requires a detailed invoice to comply with the Prompt Payment Act, which mandates timely payment of invoices submitted by contractors and vendors. Your invoice must include specific information to avoid processing delays.

You need to send a receipt template after payment is received but first need to issue a formal invoice documenting the amount due, payment method options, and the deadline for payment.

You are billing for a project with multiple phases or milestones and need to issue partial invoices as each phase is completed. Each invoice must reference the original contract, the specific milestone, and the portion of the total amount being billed.

What Should a Invoice Template Include?

Business and Client Information

Include your business name, logo, address, phone number, email, and tax identification number (EIN or SSN). List the client's name, company name, billing address, and contact information. Accurate client information ensures the invoice reaches the correct accounts payable department.

Invoice Number and Date

Assign a unique invoice number for tracking and accounting purposes. Include the invoice date and the due date based on your net payment terms. Sequential invoice numbering helps both you and your client track payments and resolve discrepancies.

Itemized Line Items

List each product or service on a separate line with a description, quantity, unit price, and line total. Itemized invoices are easier for clients to approve, reduce payment disputes, and provide clearer records for tax purposes. Group related items together for readability.

Subtotal, Tax, and Total

Calculate the subtotal of all line items. Add applicable sales tax, showing the tax rate and amount separately. State the total amount due in a prominent position. If discounts apply, show the discount amount and the adjusted total.

Payment Terms and Methods

Specify the net payment terms (e.g., Net 30 means payment is due within 30 days of the invoice date). List accepted payment methods such as bank transfer, check, credit card, or online payment platforms. Include bank details or payment links as applicable.

Late Payment Terms

State the late payment penalty that applies if the invoice is not paid by the due date. A common approach is to charge 1.5% per month (18% annually) on overdue balances. Late payment terms encourage timely payment and compensate you for the cost of delayed cash flow.

Signature Requirements

No Signature Required

Invoices are billing documents that do not require signatures to be valid. The invoice serves as a formal request for payment and creates a record of the transaction for accounting and tax purposes.

How to Fill Out a Invoice Template

1

Enter Your Business Information

Fill in your business name or your name if you are a sole proprietor, your address, phone number, email address, and tax ID. Add your logo if available to present a professional appearance.

2

Enter Client Information

Fill in the client's name, company name, billing address, and any reference numbers they require (such as a purchase order number). Confirm the billing contact if the client has a dedicated accounts payable department.

3

Assign Invoice Number and Dates

Enter a unique invoice number following your numbering system. Enter the invoice date and calculate the due date based on your payment terms. For Net 30 terms, the due date is 30 calendar days after the invoice date.

4

Add Line Items

Enter each product or service as a separate line item with a clear description, the quantity, the unit price, and the extended amount. Double-check calculations and ensure descriptions match the scope of work or contract terms.

5

Calculate Totals and Tax

Sum all line items to produce the subtotal. Apply the appropriate sales tax rate if applicable. Add any shipping or handling charges. State the grand total prominently. If a deposit was previously paid, subtract it and show the balance due.

6

Add Payment Instructions and Send

Include your payment instructions, such as bank wire details, mailing address for checks, or a link to your online payment portal. Review the completed invoice for accuracy and send it to the client via email or your invoicing platform.

Free Template vs Custom Invoice Template

FeatureFree TemplateCustom (AI or Attorney)
Basic invoice structure
Itemized line items and totals
Custom branding and logo-
Tax calculation and complianceState sales tax varies-
Attorney review and customization-
Digital download (PDF/Word)

Invoice Template Template FAQ

What should be included on an invoice?
A complete invoice should include your business name and contact information, the client's name and billing address, a unique invoice number, the invoice date and due date, itemized line items with descriptions and prices, subtotal, applicable taxes, and the total amount due. You should also include payment terms, accepted payment methods, and late payment penalties. For business-to-business transactions, include both parties' tax identification numbers for record-keeping and tax reporting purposes.
Is an invoice a legal document?
An invoice is a commercial document that serves as a formal request for payment, but it is not a contract by itself. However, an invoice does serve as evidence of a transaction and can be used in court to support a claim for payment. When an invoice references an existing contract or purchase order, it becomes part of the documented business relationship. Invoices are also legal documents for tax purposes, as the IRS and state tax authorities require them as supporting documentation for income and expense reporting.
What is the difference between an invoice and a receipt?
An invoice is a request for payment issued before or at the time goods or services are delivered. It tells the buyer how much they owe and when payment is due. A receipt is confirmation that payment has been received, issued after the buyer pays. The invoice creates the obligation to pay, while the receipt proves the obligation has been satisfied. In accounting terms, an invoice represents an accounts receivable entry, while a receipt confirms the receivable has been collected.
What are net payment terms?
Net payment terms specify the number of days a buyer has to pay an invoice after the invoice date. Net 30 means payment is due within 30 calendar days, Net 15 means 15 days, and Net 60 means 60 days. Some businesses offer early payment discounts, such as "2/10 Net 30," which means the buyer gets a 2% discount if they pay within 10 days; otherwise, the full amount is due in 30 days. Payment terms should be agreed upon before work begins and stated clearly on every invoice.
Can you charge interest on unpaid invoices?
Yes, you can charge interest on unpaid invoices if the right to charge interest is stated in your contract, payment terms, or on the invoice itself. The interest rate must comply with your state's usury laws. For government contracts, the Prompt Payment Act may entitle you to interest on late payments at a federally set rate. Many businesses charge 1% to 1.5% per month on overdue balances. Stating the late payment terms on every invoice ensures the client is on notice before interest begins to accrue.
What is a proforma invoice?
A proforma invoice is a preliminary or estimated invoice sent to a buyer before goods are shipped or services are performed. It shows the expected costs, terms, and delivery details so the buyer can review and approve them before committing. Unlike a standard invoice, a proforma invoice is not a demand for payment and does not appear in accounts receivable. It is commonly used in international trade to declare the value of goods for customs purposes and to help buyers secure financing or import permits.
How do you write a professional invoice?
To write a professional invoice, start with a clean, branded layout that includes your business name, logo, and contact information at the top. Assign a unique invoice number and include the date and payment due date. List the client's billing information. Itemize each product or service with descriptions, quantities, and prices. Calculate and display the subtotal, taxes, and total. State your payment terms, accepted methods, and late payment policy. Review for accuracy and send promptly after delivering the goods or completing the service.
What is an invoice number?
An invoice number is a unique identifier assigned to each invoice for tracking, reference, and accounting purposes. Invoice numbers should follow a consistent sequential or coded system so both you and your client can easily locate specific invoices. Common formats include simple sequential numbers (001, 002, 003), date-based codes (2026-0001), or client-based codes (ACME-001). The IRS requires businesses to maintain organized records, and unique invoice numbers are essential for accurate bookkeeping, tax filing, and resolving payment disputes.

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Attorney-Verified Document: All Legal Tank templates are drafted and reviewed by licensed attorneys to ensure legal accuracy and compliance with current state and federal laws. While our templates meet professional legal standards, individual circumstances vary. We recommend consulting with a licensed attorney in your jurisdiction for complex or high-stakes legal matters. Legal Tank is not a law firm and use of our platform does not create an attorney-client relationship.

Reviewed by licensed attorneys · Editorial policy · Last updated March 2026

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