The invoice lifecycle, explained
Invoice Guides
Choose the right document, create a traceable invoice, record payment and follow up on open balances. Every guide connects the explanation to a working browser-local tool.
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Invoice vs Receipt
An invoice is a request for payment issued before or while money is owed. A receipt is proof that a payment was received. One transaction may need both: the invoice establishes the amount due, and the receipt records the later payment.
Read guide →Quote vs Estimate vs Invoice
A quote offers a defined price for a stated scope, an estimate forecasts a likely cost when details may change, and an invoice requests payment for the agreed or completed work. A quote or estimate comes before the sale; an invoice comes when payment is due.
Read guide →Proforma Invoice vs Commercial Invoice
A proforma invoice is a preliminary document used to describe a proposed international sale before shipment. A commercial invoice records the actual sale and is used for payment and customs clearance. The final commercial invoice must reflect the goods actually shipped and destination-specific requirements.
Read guide →Credit Note vs Refund
A credit note changes the amount recorded against an invoice. A refund is the movement of money back to the customer. If the customer already paid an overcharge, the seller may need both: a credit note to correct the invoice record and a refund to return the cash.
Read guide →Create a traceable invoice
What Must an Invoice Include?
A practical invoice identifies the seller, customer, document number, issue and supply dates, goods or services, quantities and prices, taxes, total, currency and payment terms. Legal and tax requirements vary, so the applicable jurisdiction and transaction type must be checked before issue.
Read guide →Invoice Numbering
Use a unique, consistent identifier for every issued invoice. A simple sequence such as INV-0001 is easy to reconcile; prefixes or year codes can be added when they have a documented purpose. Do not reuse a number for a different transaction.
Read guide →Invoice Payment Terms
Invoice payment terms state when payment is due, how it can be made and what happens if the amount is disputed or late. Agree material terms before work begins, then put both the term and exact calendar due date on the invoice.
Read guide →Record and collect payment
How to Invoice Partial Payments
Keep the original invoice total visible, record each cleared payment against it and show the remaining balance. Issue a receipt for each payment when appropriate, and use the invoice number as the shared reference across the invoice, receipt, bank record and tracker.
Read guide →What to Do When an Invoice Is Overdue
First verify the due date, balance, recipient and payment record. Resend the invoice with a factual reminder, ask whether anything blocks payment, record the response and follow a consistent escalation schedule. Add fees or legal threats only when they are accurate and permitted.
Read guide →Accounts Receivable Aging Explained
An accounts receivable aging report groups each unpaid invoice balance by how long it is past due. It helps prioritize follow-up and spot concentration in old debt, but it must be reconciled to the invoice register and accounting records before financial use.
Read guide →Invoice vs Statement
An invoice requests payment for a specific transaction or billing milestone. A statement summarizes multiple invoices, credits, payments and the account balance over a period. A statement supports collection and reconciliation; it does not replace the underlying invoices.
Read guide →Sourced reference
EU VAT Invoice Requirements
A reviewed EU-wide field checklist with Directive references, special wording, national-rule caveats and downloadable CSV.
Open the sourced checklist →