As the name suggests, simple invoice is simple for invoicing.  Simple Invoices are of two types: total invoices and itemized invoices. The former consulting invoices were merged into itemized invoices. A ‘Total Invoice' provides one price and associated tax for all listed actions, whereas an itemized invoice lists all the items on the face of the invoice and gives the total price.

Invoice and bill are similar in their nature and purpose, a written document given by a seller to the buyer. Simple invoice template makes the invoicing process simple. In every business, an invoice is a necessary document where money transactions involve. In simple words, invoice specifies the amount of money the buyer owes to the seller. Simple invoice can be used in all small business transactions to name a few: consulting, construction, transportation billing, home business, freelancer, contractor, service provider etc.

Simple invoice making is an easy process. Basically, three main parts make the form of invoice: the header, body and the footer. Header contains details of business including registration number. The body shows description of product supply or services. Footer consists of amounts of goods, tax and after-tax, also payment instructions and other necessary details. There are several kinds of invoice, some of the generally in use are, debit memnto, pro forma, self billing, credit memento, time sheet etc. Simple invoice template is more helpful in electronic invoicing in PDF form usually and also can be made from simple to simpler using word processor or spreadsheet.  It is be noted that majority of the clients seek for a signed timesheet copy along with the invoice and to ensure sending of the same.

Though there is no accounting functionality for Simple Invoice in present times, its free and open accessible web based source software and plug in system may add accounting functionality in due course.