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What is an invoice?
The essential business document explained for new freelancers and small business owners.
An invoice is a formal request for payment sent from a seller to a buyer. It documents what was provided, how much is owed, and when payment is due.
Invoices serve as legal records for both parties and are essential for accounting, tax filing, and cash flow management.
Every invoice should identify the seller and buyer, list goods or services with prices, show the total amount due, and specify payment terms.
Is an invoice a receipt?
No. An invoice requests payment; a receipt confirms payment was received.
Are invoices legally required?
Requirements vary by country and business type — consult local regulations.
Why teams choose InvoyFlow
Fast to start
Create a polished invoice in under two minutes — no accounting degree required.
Get paid online
Accept card and PayPal payments on every invoice with one-click setup.
Estimates & receipts
Win work with estimates, then convert to invoices and issue receipts automatically.
Fair pricing
Start free. Core is $8/mo, Unlimited is $15/mo — no surprise fees.