--- title: "How to Invoice Clients and Actually Get Paid" description: "What every invoice must contain, which payment terms actually work, how to chase late payers without damaging the relationship, and how to track what you're owed." canonical: https://incomewise.app/guides/how-to-invoice-clients published: 2026-08-02 updated: 2026-08-02 reading_minutes: 8 keywords: ["how to invoice a client","invoice payment terms","net 30","how to write an invoice","late payment chasing","accounts receivable small business","freelance invoicing","invoice tracking software"] publisher: "IncomeWise (Income Split Planner)" license: "Free to quote with attribution and a link to the canonical URL" --- # How to Invoice Clients and Actually Get Paid on Time An invoice is not a request. It is a dated statement of a debt already incurred, and the way you write and follow up on it determines whether you're paid in two weeks or two months. For a small business, the gap between those two outcomes is often the difference between comfortable and precarious — the work is identical either way. ## What every invoice must contain Missing information is the most common reason an invoice sits unpaid: it lands in an accounts-payable inbox, fails a validation check, and nobody tells you. Include all of this every time, even for a client you've worked with for years. - A unique, sequential invoice number — gaps and duplicates cause rejections. - Issue date and a specific due date, written as a date, not as 'net 30'. - Your legal business name, address, and tax/VAT number where applicable. - The client's legal entity name — not the contact's personal name. - A line-item breakdown: what was done, quantity, unit price, line total. - Subtotal, tax applied, and the total due in a clearly stated currency. - Payment methods and full bank details. - Any purchase-order or reference number the client asked for. ## Payment terms, and which ones work Net 30 is the default in most industries, meaning payment is due 30 days from the invoice date. Net 14 is realistic for smaller clients and freelancers. Net 60 and Net 90 exist mainly because large companies can impose them, and you should price for the financing cost if you accept them. Two changes reliably shorten payment time. First, write the actual due date — '15 September 2026' rather than 'Net 30', because the second requires the reader to do arithmetic and they won't. Second, invoice the day the work is delivered, not at the end of the month. A single day of delay in issuing is a day of delay in being paid, and monthly batching adds up to two weeks of average lag for free. ## Get paid before you start, sometimes For a new client, a large project, or anything with material upfront cost, take a deposit — 30 to 50% before work begins is standard and rarely challenged. It filters out clients who were never going to pay, and it means a walked-away project doesn't cost you the whole engagement. For ongoing work, milestone invoicing beats a single invoice at the end. It smooths your cash flow and it caps your exposure: at any moment you're owed for one milestone rather than the entire project. ## Chase early, briefly, and without apology Most late payments aren't refusals — the invoice was missed, the approver was away, it needed a PO number nobody mentioned. Assume that, and the chase becomes administrative rather than confrontational. A schedule that works: a short reminder three days before the due date; a direct email the day after it passes; a phone call at day seven with the accounts department rather than your usual contact; a formal notice referencing your late-payment terms at day fourteen. Keep each message two sentences and attach the invoice again — you're removing excuses, not making a case. ## Track what you're owed, not just what you've earned Revenue recorded is not money received. The number that matters for survival is outstanding receivables — the total sitting in unpaid invoices — and its age profile. Ninety days of receivables that are all under two weeks old is a healthy business; the same total where half is over sixty days is a business with a collection problem it hasn't admitted to. Track invoice status explicitly: draft, sent, partially paid, paid, overdue. IncomeWise's Business workspace does this per client and logs the revenue automatically when an invoice is first marked paid, so the P&L reflects cash received rather than hopes issued. ## When an invoice won't be paid After a formal notice, escalate in proportion to the amount. Small sums: stop work, keep the relationship, write it off if chasing costs more than the debt. Larger sums: a solicitor's letter is inexpensive and resolves a surprising share of disputes on its own. Beyond that, small-claims processes exist in most jurisdictions and are designed to be used without representation. The real lesson is upstream. A client who doesn't pay the deposit rarely pays the balance — and the cheapest debt to collect is the one you declined to extend. ## Frequently asked questions ### What does Net 30 mean on an invoice? Payment is due 30 days from the invoice date. Write the actual calendar due date alongside it — asking the reader to calculate the date is one of the most common reasons an invoice drifts past its deadline. ### How do I chase a late invoice politely? Assume it was missed rather than refused. Send a two-sentence reminder the day after the due date with the invoice re-attached, phone the accounts department at day seven, and issue a formal notice referencing your late-payment terms at day fourteen. Brevity reads as routine; long emails read as conflict. ### Should I ask for a deposit? Yes, for new clients, large projects, or anything with upfront cost — 30 to 50% before starting is standard and rarely questioned. It filters out clients who were never going to pay and caps your exposure if a project stalls. ### What information is legally required on an invoice? It varies by jurisdiction, but universally: a unique invoice number, issue and due dates, your business name and address, tax/VAT number where you're registered, the client's legal entity name, itemised charges, tax applied, and the total due in a stated currency. ### What's the best way to track unpaid invoices? Track status and age, not just totals — an outstanding balance means something very different at 14 days than at 90. IncomeWise's Business workspace tracks invoice status per client, flags overdue ones, and logs the revenue automatically the first time an invoice is marked paid. ## Related guides - [Small Business Bookkeeping: A Practical Guide](https://incomewise.app/guides/small-business-bookkeeping) - [How to Run Payroll for a Small Business](https://incomewise.app/guides/small-business-payroll) - [Inventory Management for Small Businesses](https://incomewise.app/guides/inventory-management-small-business) --- Published by [IncomeWise](https://incomewise.app/) — a free multi-currency budgeting app with an AI advisor, personal and business workspaces, and no bank login required. Premium is $3/month and unlocks both workspaces. Canonical HTML version: https://incomewise.app/guides/how-to-invoice-clients