Invoicing guides
Practical, no-nonsense guides to invoicing your clients and getting paid — then create your invoice with the free generator.
How to Write an Invoice
An invoice is a formal request for payment that records what you sold, to whom, and how much they owe. Getting it right matters for two reasons: it's how you get paid on time, and it's a legal and accounting document both you and your client rely on at tax time.
Read the guide →How to Invoice as a Freelancer
For freelancers, the invoice is the last step between doing the work and getting paid — and small mistakes here are what turn a two-week wait into a two-month one. The mechanics are the same as any invoice, but a few habits make a real difference to your cash flow.
Read the guide →Invoice vs Receipt: What's the Difference?
Invoices and receipts are often confused because both are records of a transaction — but they do opposite jobs. In short: an invoice requests payment, and a receipt confirms it. One comes before money changes hands; the other comes after.
Read the guide →Invoice Payment Terms Explained: Net 30, Net 15 & More
Payment terms are the short line on your invoice that decides when you actually get paid. Net 14 and Net 60 on a $3,000 invoice pay you the same $3,000 — the difference is 46 extra days of you financing your client's business. Most late-payment problems trace back to terms that were vague, missing, or never agreed in the first place.
Read the guide →How to Number Invoices
An invoice number is the unique reference that identifies one invoice among all the others — INV-0147, 2026-014, ACME-003. It looks like a trivial detail until a client asks which invoice a payment covers, an accountant reconciles your year, or a tax auditor asks why a number is missing. A sound numbering scheme takes five minutes to set up and quietly prevents all three problems.
Read the guide →Proforma Invoice vs Invoice: What's the Difference?
A proforma invoice looks exactly like an invoice and behaves nothing like one. It's a preliminary, good-faith document sent before goods ship or work finishes — a detailed statement of what you intend to supply and what it will cost. Nothing is owed when you send it, and nothing enters your books.
Read the guide →Quote vs Estimate vs Invoice: When to Use Each
A client asks what a job will cost. Do you send a quote or an estimate? And when the work is done, which document actually gets you paid? The three do different jobs at different stages: an estimate is an educated approximation, a quote is a fixed offer, and an invoice is the demand for payment once the work is delivered.
Read the guide →How to Follow Up on Unpaid Invoices
An unpaid invoice rarely means a client is refusing to pay. Most of the time the invoice was missed, stuck in an approval queue, or simply forgotten — and a well-timed reminder shakes it loose. The freelancers and small businesses that get paid fastest aren't lucky; they follow up on a schedule, with messages that get firmer at each stage.
Read the guide →What Is a VAT Invoice? What It Must Include
Most invoices only matter to two parties: you and your client. A VAT invoice matters to a third — the tax authority. Consumption taxes go by different names around the world (VAT, GST, or sales tax), and in VAT and GST systems the invoice is the document a registered buyer needs to reclaim the tax you charged them. That's why its contents are set by law, not by design taste.
Read the guide →Invoice vs Purchase Order: What's the Difference?
A purchase order and an invoice bracket the same transaction from opposite ends. The purchase order comes from the buyer before anything is delivered and authorizes the purchase; the invoice comes from you, the seller, after delivery, and requests payment. If you sell to larger companies, understanding how the two connect is the difference between getting paid on time and watching an invoice sit in limbo.
Read the guide →How to Invoice a Deposit
A deposit is money a client pays before the work starts — and like any other payment you request, it needs a proper invoice. Invoicing a deposit correctly protects you twice: the client commits real money before you commit real time, and your records show exactly what was paid up front and what remains owed. Get it wrong and the final bill turns into an argument about arithmetic.
Read the guide →What Is a Credit Note (Credit Memo)?
A credit note — also called a credit memo — is the document you issue to reduce or cancel an invoice you've already sent. Maybe the client returned goods, you overbilled by mistake, or you agreed a discount after the invoice went out. Instead of editing or deleting the original invoice, you issue a credit note that formally records the reduction.
Read the guide →How to Invoice International Clients
Invoicing a client in another country raises questions a domestic invoice never asks. Which currency do you bill in? Who absorbs the $25 wire fee that disappears somewhere between two banks? Do you add VAT, GST, or sales tax — and does 03/04/2026 mean March or April? Left vague, any one of these can delay a payment by weeks.
Read the guide →Recurring Invoices: How to Bill Clients on a Schedule
Some work doesn't end — it repeats. A monthly retainer, rent on a unit you let out, a quarterly maintenance contract, a block of tutoring sessions: the deliverable renews, and so does the bill. A recurring invoice is just an ordinary invoice issued on a fixed schedule, but the repetition raises its own questions — what changes each cycle, what must never change, and how to stop twelve near-identical invoices a year from blurring into each other.
Read the guide →Invoice vs Bill: What's the Difference?
Invoice and bill are often used as if they mean the same thing, and in one important sense they do. When you sell something on credit, the document you send is an invoice; when your client receives it, it lands in their books as a bill. It's the same piece of paper seen from two sides of the transaction.
Read the guide →Invoice vs Statement: What's the Difference?
An invoice bills a single sale: this work, this amount, due on this date. A statement of account steps back and summarizes the whole relationship over a period — every invoice issued, every payment received, every credit applied, and the balance still outstanding.
Read the guide →What Is a Commercial Invoice?
A commercial invoice is the document that tells customs what's in an international shipment of goods, what it's worth, and where it was made. Customs authorities use it to classify and value the goods and to work out duties and import taxes, so an incomplete one is among the most common reasons a parcel sits at the border.
Read the guide →What Is a Debit Note (Debit Memo)?
A debit note is a document that adjusts an amount already invoiced, and the confusing part is that the term is used in two directions. A seller can issue one to charge a customer more than the original invoice did; a buyer can issue one to claim a credit from a supplier.
Read the guide →How to Invoice for Hourly Work
Billing by the hour sounds simple — hours times rate — until you're turning a week of notes into an invoice and deciding what 1 hour 40 minutes is worth. Hourly invoices get paid fastest when the client can see how the hours were spent and the rules for counting them were agreed up front.
Read the guide →How to Invoice a Retainer
A retainer is an arrangement where a client pays you in advance for your time or your availability — either as a fixed fee each period, or as a prepaid balance that your work is billed against. It steadies your income and guarantees the client a place in your schedule — but only if the invoices make clear what the money buys and what happens when the work runs over or under.
Read the guide →Progress Billing: How to Invoice a Project in Stages
On a long project, waiting until the end to invoice means financing months of labor and materials yourself. Progress billing solves that by invoicing in stages as the work advances, so payments track the job instead of trailing it.
Read the guide →How to Bill Expenses and Materials on an Invoice
Most jobs involve costs beyond your own time — materials, parts, travel, software, a subcontractor's bill. Getting those onto the invoice cleanly is how you avoid quietly paying for a client's project out of your own margin.
Read the guide →How to Show a Discount on an Invoice
A discount is only worth giving if the client notices it. Quietly lowering your rate saves them money but hides the gesture, while showing the full price and the discount on separate lines makes the value visible and keeps your standard price on record for next time.
Read the guide →How to Charge Sales Tax on an Invoice
In the United States, sales tax is set by states and local governments rather than federally, so there's no single rule for when to charge it or at what rate. Five states — Alaska, Delaware, Montana, New Hampshire, and Oregon — have no general statewide sales tax, though some local taxes still apply, notably in Alaska. Getting it wrong is expensive: tax you should have collected but didn't usually comes out of your own pocket when it's discovered.
Read the guide →How to Email an Invoice
Most invoices travel by email now, and the email matters almost as much as the invoice. A vague subject line gets buried, a missing purchase order number gets the invoice sent back by accounts payable, and a message that doesn't say how to pay adds days before anyone acts on it.
Read the guide →How to Handle Partial Payments on an Invoice
A client pays $1,500 against a $2,000 invoice. It might be an installment you agreed, a deliberate short payment over one line, or a simple mistake; either way, the invoice is now partly paid, and how you handle the next step decides whether the remaining $500 arrives or quietly disappears.
Read the guide →