Start with the work, not the layout
A client pays faster when the invoice answers three questions without a phone call. Who is billing? What was delivered? How much is due, and by when?
Put the project name in the reference field if you have one. Then describe each line the way the client remembers the work. "Homepage design, March" is easier to approve than "Services".
Price the line, then the discount
Enter the quantity and the unit price you agreed. If you offered 10 percent off one line, put that discount on the line rather than burying a round number in the notes. InvoiceMint subtracts the discount before it applies the tax rate you enter, which matches the way most freelance agreements are written.
Say how to pay
Bank details belong in payment instructions. Card numbers do not. Include the invoice number in the instructions so the payment can be matched. A due date fourteen days out is a common default; change it if your contract says something else.
Keep a copy
Download the PDF when you send it, and if you have an account, leave the status as Sent until the money arrives. Guest invoices stay in the browser that created them, so an account is the right place for work you still expect to collect.