Because an invoice is a key part of the payment process, you need to make it look professional. An invoice is a representation of your business so what you give your client should show that. Adding your logo can make your invoice better reflect your business.
Your invoice must also be clear and easy to read. That means using a readable font, colours with enough contrast and a sensible structure. A client reads the invoice to understand what they need to pay you. If they can’t read the invoice or they misinterpret it, you could potentially not get paid.
There are a few ways to organise your list of products and/or services. On a large job, you might want to group the products and/or services based on when they were used or executed. You can also group similar products and/or services.
The sample invoice provided on this page has everything you need to make a good invoice. You can use it as a baseline to make your own or you can change the values in it and use it as you need.
Alternatively, you can try Bookipi Invoice. Bookipi Invoice is an invoice generator that you can use to create and send invoices. The benefits of using an invoice generator like Bookipi is that all your invoices, customers and items are saved for you you to either use or manage at a later date. You also can accept payments through Bookipi.