Invoice Generator

A well-structured invoice is one of the most important documents a business sends. It tells your client exactly what they owe, when payment is due, and how to pay — and it's often the first and last impression a client has of how seriously you run your business. Whether you're a freelancer billing a single client or an exporter shipping goods internationally, getting the structure right matters as much as getting the numbers right.

Start with the right document type

Not every billing situation calls for the same kind of document. A Standard Invoice is what most businesses use day to day: it requests payment for goods or services already delivered, and it is legally a demand for payment. A Proforma Invoice, by contrast, is a preliminary bill of sale sent before the work is finished or the goods are shipped — it gives the buyer a good-faith estimate of costs so they can arrange financing, apply for an import permit, or open a letter of credit, but it is not a demand for payment and shouldn't be entered into accounting records as revenue. A Commercial Export Invoice goes a step further again: it is required by customs authorities in both the exporting and importing country to calculate duties and taxes, and it must include details a standard invoice doesn't, such as HS (Harmonized System) codes that classify the goods and the declared country of origin for each line item. Picking the wrong document type for the situation can delay payment, trigger customs holds, or create accounting headaches down the line.

The anatomy of a professional invoice

Every invoice, regardless of type, should clearly identify who is billing whom. That means a complete From section with your business name, address, and contact details, and a complete Bill To section with the same for your client. Add a unique invoice number so both sides can reference the transaction without ambiguity, an issue date that establishes when the invoice was created, and a due date that sets clear payment expectations. Vague or missing dates are one of the most common reasons invoices get paid late — if a client has to guess when payment is due, they will usually guess in their own favor.

The line items table is the heart of the invoice. Each row should describe exactly what was delivered, the quantity, the unit price, and the line total — avoid vague descriptions like "services rendered" in favor of specifics like "Website redesign — homepage and 3 subpages." For commercial export invoices, each line also needs an HS code, which customs officials use to determine tariff classification and duty rates, and a declared country of origin, which can affect preferential trade agreement eligibility. Getting these two fields wrong is one of the most common causes of customs delays for small exporters.

Taxes, discounts, and shipping

Once your line items are listed, calculate a subtotal, then apply any discount, add shipping or freight charges, and finally apply tax. The order matters: tax should generally be calculated after discounts are applied, since most tax authorities expect tax to be charged on the net price actually paid, not the original list price. If you operate across borders, check whether your tax rate should reflect VAT, GST, sales tax, or no tax at all for cross-border B2B transactions — invoicing rules differ significantly by jurisdiction.

Branding, currency, and signatures

A consistent brand color, your logo, and a clean template style make an invoice feel like it came from an established business rather than a hastily assembled spreadsheet. If you work with international clients, always state your currency explicitly next to every amount — "$500" is ambiguous when it could mean USD, CAD, or AUD, but "USD $500.00" is not. Finally, a signature — even a simple drawn signature — adds a layer of authenticity and can be a contractual requirement for certain international shipments or large purchase orders.

Keep a consistent process

The businesses that get paid fastest are the ones that invoice consistently: the same numbering scheme, the same payment terms language, and the same level of detail every time. Use a tool that lets you save your branding once and reuse it across every invoice, rather than rebuilding the layout from scratch each time you bill a client.