Invoicing guides

Clear, practical answers to the questions every freelancer and small business runs into — from writing your first invoice to VAT, payment terms and chasing late payments.

Invoicing basics (10)Getting paid (10)Tax & international (9)Tool comparisons (4)

Invoicing basics

Credit Notes & Refunds: How to Correct an InvoiceWhat a credit note is, when to issue one instead of editing an invoice, what it must include, how VAT is adjusted, plus refund and discount examples.5 min read How to Invoice as a Freelancer: A Complete GuideEverything freelancers need to invoice clients: when to bill, hourly vs. fixed-price, deposits, taxes, international clients and a reusable workflow.6 min read How to Write a Quote That Wins Work (with Example)How to write a clear, professional quote: scope, line items, exclusions, validity, payment terms and acceptance — with a full example and a checklist.5 min read How to Write a Receipt: What to Include + ExampleWrite a clear, professional receipt in minutes: the details every receipt needs, a worked example, partial payments, cash receipts and common mistakes.4 min read How to Write an Invoice: Step-by-Step Guide & ExampleLearn how to write a professional invoice in 9 clear steps — what to include, how to calculate tax and totals, and a worked example you can copy.7 min read Invoice Numbering: Best Practices, Formats & ExamplesHow to number invoices correctly: sequential formats tax authorities accept, examples by business type, multiple series, and handling gaps and voids.5 min read Invoice vs. Receipt: Differences and When to Use EachAn invoice asks for payment; a receipt proves it. Learn the differences, what each must contain, when you need both and how to handle on-the-spot sales.4 min read Quote vs. Estimate vs. Invoice: Differences ExplainedQuotes fix a price, estimates approximate it, invoices request payment. When to use each, what they commit you to and how to turn a quote into an invoice.5 min read What Is a Proforma Invoice? Meaning, Uses and ExampleA proforma invoice is a preliminary bill sent before a sale is final. Learn when to use one, how it differs from an invoice or quote, and what to include.5 min read What to Include on an Invoice: Required DetailsA complete checklist of what an invoice should contain: legally required VAT/GST fields, details that get you paid faster, and country differences.6 min read

Getting paid

Deposit Invoices: How to Bill an Upfront PaymentHow to request a deposit: how much to ask for, what to write on a deposit invoice, VAT on advance payments, and deducting it on the final invoice.4 min read How to Bill Hourly: Timesheets, Rounding & InvoicesHourly billing done right: setting your rate, tracking time, rounding rules, what to show on an hourly invoice, caps and estimates, and avoiding disputes.4 min read How to Get Paid Faster: 15 Ways to Cut Late InvoicesPractical tactics to get invoices paid sooner: deposits, clear terms, better invoices, easy payment options and a follow-up system that works.5 min read How to Price Freelance Services: Rates That WorkSet freelance rates with confidence: calculate a minimum hourly rate, pick hourly, project, retainer or value pricing, present prices and raise rates.4 min read How to Send an Invoice by Email (+ Copy-Paste Templates)How to email an invoice professionally: subject lines, recipients, PDF attachments and filenames — plus copy-paste email templates for every situation.5 min read Invoice Disputes: How to Prevent and Resolve ThemWhy clients dispute invoices, how to respond step by step, partial payments, credit notes, escalation options and how to prevent disputes.4 min read Invoice Factoring Basics: How It Works, Costs & RisksA plain-English guide to invoice factoring and invoice finance: how it works, recourse vs. non-recourse, how fees add up, pros, cons and alternatives.4 min read Invoice Payment Terms Explained: Net 30, EOM & MoreWhat Net 30, EOM, due on receipt and 2/10 Net 30 mean, how to choose and word payment terms on an invoice, and what the law says about late payment.5 min read Late Payment Reminder Templates: 6 Free EmailsCopy-and-paste payment reminder emails for every stage, from before the due date to a final notice, plus a phone script and a follow-up schedule.6 min read Recurring Invoices & Retainers: Billing Ongoing ClientsHow recurring invoices and retainers work: retainer types, wording and numbering monthly invoices, unused hours, overages and on-time payment.5 min read

Tax & international

Commercial Invoice for Export: What to IncludeWhat a commercial invoice is, what customs needs on it (HS codes, Incoterms, origin, weights), a worked example and mistakes that delay shipments.5 min read GST Tax Invoice in India: Format & RulesWhat an Indian GST tax invoice must contain: GSTIN, numbering, HSN/SAC codes, CGST/SGST vs IGST, place of supply, time limits and e-invoicing (IRN).4 min read How to Charge VAT on Invoices (EU, UK & Reverse Charge)A practical guide to VAT on invoices: required details, calculating VAT, cross-border sales, the EU reverse charge, OSS and UK differences.6 min read How to Invoice in a Foreign Currency & Handle FX RatesHow to invoice international clients in any currency: choosing the currency, exchange rates, VAT in local currency, bank fees and FX gains or losses.5 min read How to Invoice International Clients: A ChecklistInvoicing clients abroad: currency, VAT and reverse charge, withholding tax, bank details and fees, dates and formats, e-invoicing — with a checklist.5 min read Sales Tax on Invoices in the US: A Practical GuideHow US sales tax works on invoices: nexus and economic thresholds, taxable goods vs. services, sourcing rules, exemption certificates and invoice layout.6 min read Self-Employed Invoice UK: Sole Trader RequirementsWhat a UK sole trader invoice must include, VAT registration and VAT invoices, business names, late payment rights, records and Making Tax Digital.5 min read Tax Invoice Australia: GST Requirements ExplainedWhat an Australian tax invoice must show, the $82.50 and $1,000 rules, GST at 10%, invoicing when not GST-registered, ABN withholding and adjustment notes.4 min read What Is an E-Invoice? E-Invoicing Mandates ExplainedWhat counts as an e-invoice, why a PDF usually doesn't, the main formats and e-invoicing rules in the EU, Germany, France, Italy, Poland, India and more.7 min read

Tool comparisons

Best Free Invoice Generators (October 2026)A fair roundup of free invoice tools: Invoice-Generator.com, Invoice Simple, Zoho Invoice, Wave, PayPal and BillKit — strengths, limits and who each suits.5 min read BillKit vs Invoice Simple: Which Should You Use?An honest BillKit vs Invoice Simple comparison: features, pricing model, privacy, mobile use, sending and payments — and when Invoice Simple is better.5 min read BillKit vs Invoice-Generator.com: ComparedBillKit vs Invoice-Generator.com: two no-sign-up invoice generators compared on documents, languages, tax, design and privacy — with a fair verdict.4 min read BillKit vs Zoho Invoice: Honest ComparisonBillKit vs Zoho Invoice: setup, automation, recurring invoices, payments and privacy compared — and why Zoho Invoice suits many growing businesses better.4 min read