One author, accountable by name
Every guide is researched and written by me, Luiz Torres— the developer who builds and maintains the invoice, receipt, and quote tools on this site. I'm not a CPA or a lawyer, and the articles never pretend otherwise. That constraint shapes the writing in a useful way: instead of leaning on credentials, each guide has to show its work — cite the official rule, walk through the actual arithmetic, and tell you when a question needs a real professional.
Where the information comes from
Invoicing sits next to tax law, so sourcing matters. When a guide makes a claim about retention periods, sales tax, or invoice requirements, it is checked against — and linked to — primary sources: the IRS's small-business pages (for example its guidance on how long to keep records), SBA.gov, HMRC and GOV.UK for United Kingdom rules, and official EU guidance for VAT topics. Worked examples — subtotals, tax lines, discounts — are recalculated by hand and cross-checked against the same math the generator itself uses, so the articles and the tool never disagree with each other.
The honest limits of a freelancing guide
These articles teach concepts: what belongs on an invoice, how Net 30 works, why a receipt is not an invoice. They cannot tell you whether your service is taxable in yourstate, or what your contract should say — that depends on facts I can't see and law I'm not licensed to interpret. Nothing here is financial, legal, or tax advice. Where a guide touches those areas it says so explicitly and points you toward a qualified accountant, tax professional, or attorney.
Money and independence
The site earns money from Google AdSense ads — nothing else. There are no affiliate links to invoicing software, no sponsored articles, and no paid placements. If a guide mentions a payment platform or a piece of software, it is because the comparison is useful, not because anyone paid for the mention.
Mistakes, corrections, and honest dates
When a reader points out an error and it checks out, I fix the article and update its “updated” date — the dates on posts reflect when they were genuinely published or revised, not a manufactured schedule. If you spot something wrong, from a stale retention period to a typo in a worked example, email contact@freeinvoicegen.app or use the contact page. Pointing to the exact sentence speeds things up.