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Open Source Billing a beautiful and super simple software to create and send invoices and receive payments online.

Features

A nice looking Dashboard with graph, key metrics, current and past invoices and a list of recent activities
Create and send invoices to your clients
Enter payments against sent invoices
Partial payments tracking
Receive payments through Paypal and credit card
Invoice dispute management
Export invoices to PDF
Reports like Payments Collected, Aged Accounts Receivable, Revenue By Client and more to come

How to create new invoice

Click on Invoices on the site’s main menu and then click New Invoice button. Or go to the Dashboard on the site’s main menu and click New Invoice button. This will open up the new invoice form
Select a client to send this new invoice to from the drop down.
Select a term of payment for this new invoice from the drop down list. Selected term is also used to determine the due date of the invoice payment. You provide some different due date too.
Select an item from the Items drop down list add in this new invoice and enter its description, per unit cost, quantity and taxes. Add as many line items as you want.
Give any discount as $ amount or % of the invoice subtotal.
Add ant Notes at the bottom. They will be visible to the client on the invoice.
Click the Send Invoice button to send this new invoice to the client. This will send an email to client with the live URL of invoice. Alternatively, you may click Send Invoice button to save invoice as a draft and send at a later time.

New Invoice

Note: You may add new Client, Payment Term, Item, and Tax by clicking the Add New button at the bottom of corresponding drop down list. See the screen shot below:

Create new records on the fly

How to enter a payment

Click on Payments on the site’s main menu and then click on the button New Payment. Or go to Dashboard on the site’s main menu and click button New Payment button.
This will open up a dialog with a list of unpaid or partially paid invoices. Select one or more invoices to enter payments for and then click Enter Payment button. This will open up the enter payment form for the selected invoices.
Enter the payment received from the client. It can be a full payment or a partial payment. Check the Pay Full check box in case of full payment or unchecked it and enter the partial payment amount.
Then select the method of payment and date of payment received. Check the Send payment notification check box to send notification email to the client that the payment has been received. Click the button Save to enter the new payments.

Select invoices for payment Enter payments