Invoicing & payments
How to write an invoice that gets paid, what has to appear on it in the US and UK, which payment terms actually work, and what to do when a client goes quiet.
Invoicing looks like a formatting problem and is really an approval problem. The document you send is read by someone who was not in any of your meetings, cannot verify what was agreed, and is working from a policy that says do not approve what you cannot check. Almost every delay in freelance payment traces back to that gap.
These guides work through it from both ends. On the mechanics: what a US invoice needs, what GOV.UK actually requires of UK sole traders and limited companies, when a VAT invoice becomes a different document with its own mandatory fields, and how long you have to keep the records afterwards. On the strategy: which payment terms fit which kind of client, why Net 15 can be counterproductive with a large company, and the statutory late-payment rights that most freelancers never invoke.
Where a rule depends on your country or your business structure, we say which and link to the tax authority's own page rather than flattening it into a single confident answer.
Emailing a PDF is not the same thing as e-invoicing, and in a growing list of countries the difference is now a legal one. What online invoicing actually involves, what it costs, and which rules are coming for you.
Almost every 'free' invoicing product is free to send and paid to get paid. Here is where the money really sits, which limits you will hit first, and how to tell whether you need software at all.
A proforma invoice is not an invoice, does not create a VAT liability, and cannot be used to reclaim VAT. Here is a free proforma invoice template and the rules that make the distinction matter.
A VAT invoice is a different document with its own mandatory list. Here is a free UK VAT invoice template, every field HMRC requires, how the tax point works, and when a simplified invoice is allowed instead.
A free invoice template for UK sole traders and self-employed workers, with the fields GOV.UK actually requires, when you must add VAT, and how long HMRC expects you to keep the records.
A copy-paste freelance invoice template, and the fields that matter specifically to freelance work — deposits, hourly versus project billing, expenses, kill fees, and what to do when a client goes quiet.
A complete walkthrough of making an invoice online at no cost — what every field is for, which free tools attach strings, and how to send it so it actually gets paid rather than sitting in an approval queue.
A complete invoice template you can copy and use today, plus what every field is for, how US and UK requirements differ, and the template mistakes that quietly delay payment.
You do not need QuickBooks to send your first invoice. Four approaches that work with what you already have, what each one is genuinely good at, and the point at which you should stop and buy something.
A professional invoice is not a design problem. It is a document that gets approved by someone who has never met you, on the first pass, without a single email. Here is how to build one.
Net 30 is the default because it is the default, not because it is right for you. Here is what each term actually costs a freelancer in cash-flow terms, when a shorter term backfires, and the legal limits on how long a client can make you wait.
UK invoicing has actual legal requirements — different ones for sole traders, limited companies and VAT-registered businesses. Here is exactly what GOV.UK requires on each, plus the statutory late-payment rights most freelancers never use.
There is no federal law dictating what a US invoice must contain — but there is a list of fields that gets you paid, and a shorter list the IRS cares about. Here is what belongs on the document, what does not, and where the rules actually come from.
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