Invoicing & billing.

Learn the fundamentals of invoicing — from writing your first invoice to retainers, reminders, and getting paid on time.

Invoicing is how you turn finished work into money: you send a clear request for payment, agree when it is due, and follow up until it lands. The short answer is to put the same few things on every invoice, bill on a schedule instead of from memory, and automate the reminders. The guides below cover each step, from your first invoice to retainers, deposits and late payments.

Getting started with invoicing

How to write an invoiceWhat to include so clients pay without questions.How to invoice for consulting servicesThe AP-ready format, terms, and follow-up cadence.What is an invoice number?Formats, sequencing, and why duplicates stall payment.Invoice vs receiptThe request before payment, the proof after.Net 30 payment termsWhat net 30 means and when shorter terms win.Deposit invoiceBill an upfront payment and credit it later.Blank invoice templateA printable invoice to fill in by hand or as a PDF.Free invoice templateCSV templates that open in Excel and Google Sheets.Free invoice generatorBuild a print-ready invoice in the browser.Free estimate templateA clean estimate with valid-until date, as CSV.

Getting paid on time

How to get paid fasterTerms, cadence, and the follow-up rhythm that works.Retainer fee explainedThe two retainer models and how to bill them automatically.Kill feeWhat a client pays if they cancel mid-project.Retainer pricing calculatorPrice a monthly retainer with overhead and margin built in.Invoice email templatesWhat to write when you send, remind, and escalate.Late fee calculatorWork out a fair late fee in seconds.Payment reminder generatorReminder emails that get invoices paid.Consulting rate calculatorThe hourly, day, and project rate your income goal needs.Payment fee calculatorWhat card and ACH fees really cost per invoice.Upwork vs Fiverr fee calculatorWhat each platform leaves you on one job.Invoice due date calculatorTerms to due date, reminders, and first late day.What is a subscription fee?Recurring pricing explained, with examples.Payment reminder message examplesCopy-ready reminder wording for every stage.

Invoice software

Best invoice softwareThe shortlist for service businesses.Service business invoicing softwareWhen a simple invoice app is not enough.Invoicing and project management softwareThe client-work loop, billed on schedule.Estimate, quote, invoice & payment softwareOne flow from quote to paid.

Invoicing basics in five steps

Agree the terms before the work startsPut the price, the payment schedule and the due date in the proposal or contract. An invoice should never be the first time a client sees your terms.
Take a deposit where the work is largeMany freelancers ask for a quarter to half of the fee up front. It confirms the client is committed and covers your first stretch of time.
Write a complete invoiceInclude your details, the client, a unique invoice number, issue and due dates, itemized lines with quantity and rate, the total, and a clear way to pay.
Send it on a scheduleInvoice at the milestone, month end or retainer date you agreed, and send it the same day. Late invoices are paid late.
Follow up on a cadenceRemind before the due date, on it, and after it, using short messages that name the invoice number. Escalate politely, and add a late fee only if your terms say so.

Key terms

Invoice number: The unique ID that ties a payment and a conversation to one invoice. Keep it sequential and never reuse one.
Payment terms: The days allowed to pay, such as due on receipt, net 14 or net 30, counted from the invoice date.
Deposit invoice: An invoice for an upfront part of the fee, credited against the final invoice.
Retainer: A recurring payment that reserves your time or covers an agreed scope each month.
Kill fee: What a client pays if they cancel a project partway through.

Common questions

What should every invoice include?

Your business and client details, a unique invoice number, the issue and due dates, itemized line items with quantity, rate and amount, any taxes, the total due, the payment terms and a clear way to pay. The how to write an invoice guide walks through each part.

What payment terms should I use?

New clients and small jobs usually suit due on receipt or net 14. Established business clients often expect net 30. Whatever you choose, print it on the invoice and agree it in advance, because a term only works when it is stated and followed up.

How do I get paid faster?

Make payment expected and easy. Take deposits, state terms in the proposal, invoice on a schedule, itemize clearly, offer one-step payment options and send reminders automatically so follow-up happens even when you are busy delivering.

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