How you benefit:
invoiceit! is the time billing software where all components blend smoothly together. 
The scheduler that keeps your appointments or charge activity in easy reach and automatically adds them to your time sheet. 
A time sheet that doubles as timer - click when you start a task, click again when it's done and it's ready for billing. 
Bulk timesheet page - for faster timesheet entry of job activity.
Easy transfer from timesheet to invoice, incl. consolidate timed activities into a single billing entry on your invoice as easy as zap. Rounding, add to existing invoice or create a new one - all take no time at all.
Keep track of sub-contractors' charges and add them to invoices, we even thought of your mark-ups.
Purchase orders assigned to jobs automatically transfer to job sheet for later billing.

click any image below to enlarge 

Built-in accounting keeps your debtors' and creditors' ledgers up-to-date and a lot of the time it even makes the entries for you. Assign a job ID to any accounting entry and your job costing is taking care of.
Plus many reports, including Unbilled Hours Report and Idle Time Report (time not accounted for on timesheets) - get more productive and never miss billing for any activity.
If you want to spend time making money instead of fiddling with a complicated billing application, invoiceit! is for you.

What users said:
This is the first program I've seen that works well for consultants with little, if any, inventory. Also, I love that I can edit any amount in an invoice, that I am not restricted to what I set up in my service costs, since that can vary depending on client. 
Sarah Johnston, www.adelleabney.com

• Maintain your billing rates for every staff member and activity with up to five different charge levels. Automatically apply the correct charge level to every client.

• Maintain your clients and other contacts and their contact details in the invoiceit Contacts Manager - schedule or record tasks and appointments with a click 

• Set up your regular billing, like recurring monthly charges, for example. 

• Network the program and everyone in your organization can work with it at the same time.
• You don't need to be a computer genius to use this program.

• Send e-mails to clients directly from invoiceit! You can send invoices and other documents by e-mail. Invoices can appear as text in the message body or as PDF attachment or both.
• Know who owes you money! With invoiceit! it's easy to keep on top of your debtors and send them reminders.
• Keep 'open' invoices to add time-based charges until ready for posting or e-mailing.
• Invoices can contain as much free text as you need and even your contract/payment conditions. This means you can describe your charges with full details without running out of space. You can make your invoices look exactly as you want.

How to write invoices 
this diagram shows how the invoice comes together

Customize invoices
get your invoices to look exactly as you want it

See also:
Selling Products
Service Business
Recurring Billing
Tradesperson