Creating an invoice comes down to listing who’s billing whom, what was provided, and how much is owed, then formatting it clearly enough that your client can pay without questions. Whether you use free software or build one from scratch, every invoice follows the same basic structure. Here’s how to put one together and get paid faster.
What Every Invoice Needs
A valid invoice has a handful of required elements. Miss one and you risk delayed payments, accounting headaches, or problems at tax time.
- The word “Invoice” at the top. It sounds obvious, but labeling the document clearly prevents it from being confused with a quote, receipt, or statement.
- A unique invoice number. Sequential numbering (INV-001, INV-002) is the simplest approach. This number is how both you and your client will reference the transaction if questions come up later, and it keeps your own bookkeeping clean.
- Invoice date and due date. The invoice date is the day you send it. The due date tells your client when payment is expected. More on choosing the right window below.
- Your business information. Include your company or legal name, mailing address, phone number or email, and your logo if you have one. If you’re a sole proprietor operating under your own name, use that.
- Your client’s information. The client’s name (or company name), billing address, and a contact email. Match whatever name appears on your contract or agreement so there’s no confusion in their accounts payable system.
- Line items. Each product or service gets its own row with a description, quantity, unit price, and line total. “Website redesign, 12 hours at $125/hr, $1,500” is far more useful to everyone than a single lump sum with no breakdown.
- Subtotal, taxes, and total amount due. Add up your line items for the subtotal, then show any applicable sales tax or fees on separate lines. The final number your client owes should be the most prominent figure on the page.
- Payment instructions. Tell your client exactly how to pay: bank transfer details, a payment link, a check mailing address, or whatever methods you accept. The fewer steps they need to figure out, the faster you get paid.
You can also add an optional notes section at the bottom for project references, a brief thank-you, or reminders about upcoming work.
Choosing Payment Terms
Payment terms set the deadline and the consequences for missing it. The most common window is Net 30, meaning payment is due within 30 days of the invoice date. Shorter terms like Net 15 or even “due on receipt” are reasonable for smaller projects or new client relationships where you want cash flow sooner.
If you want to encourage early payment, offer a small discount. A term written as “2/10, Net 30” means the client gets a 2% discount if they pay within 10 days; otherwise the full amount is due in 30. For a $5,000 invoice, that’s a $100 incentive to pay quickly.
Late payment fees are worth including on every invoice, even if you rarely enforce them. The standard range is 1% to 2% of the overdue balance per month. Spell this out clearly on the invoice itself, something like “A 1.5% monthly fee applies to balances past due.” Stating the policy upfront makes it much easier to enforce later without damaging the relationship, and it signals that you take your payment timeline seriously.
Building an Invoice From Scratch
If you only send a few invoices a month, a simple spreadsheet or word processing document works fine. Create a template once and reuse it. Set up a header area with your logo and business details, a section for the client’s information, a table for line items, and a footer with payment terms and instructions. Save a blank version as your master template so you never have to rebuild the layout.
A spreadsheet has the advantage of calculating totals and tax automatically. Set formulas in the line-total column (quantity times unit price), a SUM formula for the subtotal, and a tax formula that multiplies the subtotal by your local rate. Once those formulas are in place, you only need to fill in descriptions and numbers each time.
Export the finished invoice as a PDF before sending. PDFs look the same on every device, can’t be accidentally edited by the recipient, and feel more professional than a raw spreadsheet attachment.
Using Invoicing Software
Dedicated invoicing tools save time once you’re sending invoices regularly. They store client details, auto-number your invoices, calculate taxes, send payment reminders, and let clients pay directly through a link. Several solid options exist at different price points.
For free tools, Zoho Invoice includes time tracking, multi-currency support, and customizable templates at no cost. It also integrates with Zoho’s broader accounting suite if you grow into it. Square Invoices offers a free plan with unlimited invoicing, estimates, contracts, and clients, plus it accepts cards, ACH, Apple Pay, Google Pay, cash, and checks. The free plan includes automatic reminders and deposit collection. Wave’s free Starter Plan covers unlimited estimates and invoices with the option to accept credit card payments for a processing fee.
On the paid side, QuickBooks Online starts at $20 per month and bundles invoicing with full accounting: customizable templates, automatic reminders, recurring invoices, and bank integrations. FreshBooks starts at $23 per month (or about $248 annually) for its Lite plan, which covers invoices to up to five clients and includes real-time expense tracking and weekday phone support. Wave’s Pro Plan runs $19 per month and adds automated late payment reminders, automatic bank transaction imports, and lower credit card processing fees.
If you need developer-level customization or handle high transaction volumes, Stripe Billing supports invoicing in over 135 currencies and 25 languages with a robust API. It’s best suited for businesses with some technical resources.
When evaluating any platform, pay attention to payment processing fees. Card payments typically run around 2.9% plus a fixed per-transaction fee, and ACH transfers are cheaper, often around 1%. Those percentages add up on large invoices, so it’s worth knowing the math before you commit.
Sending and Following Up
Email is the standard delivery method. Attach the invoice as a PDF and include the invoice number, total amount, and due date in the body of the email so your client doesn’t even need to open the attachment to know what’s owed. If your invoicing software generates a payment link, drop that into the email too.
Send invoices as soon as the work is complete or the product is delivered. The longer you wait, the longer you wait to get paid. For ongoing projects, set a regular schedule, whether that’s weekly, biweekly, or monthly, and stick to it so clients expect the invoice and have budget allocated.
Follow up on unpaid invoices before they become overdue. A brief, friendly reminder three to five days before the due date (“Just a heads-up that Invoice #047 is due Friday”) can prevent a late payment entirely. If the due date passes, follow up the next business day. Most late payments aren’t intentional; they’re the result of a buried email or a busy accounts payable queue. A polite nudge usually resolves it. Invoicing software with automatic reminders handles this for you.
Invoicing International Clients
When you bill clients in other countries, you need to decide which currency appears on the invoice. Billing in your client’s local currency can make you easier to work with and reduce friction, but it shifts the currency risk to you. If the exchange rate moves between the invoice date and the payment date, you could receive more or less than you expected in U.S. dollars.
You don’t need a foreign currency bank account to receive international payments. Your client can send a wire transfer denominated in their currency through the SWIFT network, and your bank converts it to dollars upon receipt for deposit into your regular checking or savings account. Ask your bank for wire transfer instructions to share with international clients, including the bank’s SWIFT code and any intermediary bank details.
If you regularly invoice in foreign currencies and want to lock in a predictable dollar amount, look into forward contracts through your bank. These let you fix the exchange rate in advance so you know exactly what you’ll receive regardless of market fluctuations.
On the invoice itself, clearly state the currency (USD, EUR, GBP) next to every amount. Include your bank’s international wire instructions in the payment details section, and note whether the client is responsible for any wire transfer fees on their end.
Keeping Your Records Organized
Save a copy of every invoice you send, along with a record of when it was paid. At minimum, maintain a simple log with the invoice number, client name, amount, date sent, due date, and date paid. This makes tax season straightforward and gives you instant visibility into outstanding receivables.
If you’re using invoicing software, this tracking happens automatically. If you’re working with templates, create a folder system organized by year and client, and update a master spreadsheet each time you send or receive payment. However you track it, the goal is the same: at any moment, you should be able to answer how much money is owed to you and by whom.