FastBill · Live

Approved hours become FastBill invoices

Customers sync with FastBill. Approved hours go there as a draft invoice per customer.

How it works

From your workday to FastBill—no retyping.

You connect with an API key from FastBill (Einstellungen › Konto › API). A second field asks for the email address you log in to FastBill with. Half5 then imports your customers and projects from FastBill. Half5 checks FastBill regularly for changes made there.

1
Connect FastBill

Paste your API key and your customers and projects come across.
2
Approve the week

A manager approves or rejects each person's submitted hours. Managers see registered hours only, never anyone's timeline.
3
Invoice

You create the invoice from an hours report. It appears in FastBill as a draft.

What carries over

What the FastBill integration handles.

From an hours report you create draft invoices: one per customer, containing only billable hours that haven't been invoiced yet. If your organisation uses approval, only approved hours qualify. The draft appears in FastBill.

Customers in sync
Customers sync both ways with FastBill. A customer you add in Half5 appears there, and one from FastBill can be booked on in Half5.
Projects
Projects come from FastBill, and your team books hours on them in Half5.
VAT
Invoice lines carry a VAT rate that FastBill accepts. Reverse-charge invoices are supported.
Sending
Send the invoice by email through FastBill, or mark it as sent yourself.
Changes reach the draft
As long as the invoice is still a draft in FastBill, changes you make in Half5 are passed on to it.
Hours are never billed twice
Hours on an invoice are locked to it. Delete a draft and you choose whether its hours become billable again.

Frequently asked questions

How do I connect my time tracking to FastBill?

Which hours are sent to FastBill?

Can an hour be invoiced twice?

Hours on an invoice are locked to it. Delete a draft and you choose whether its hours become billable again.

Which plan includes the FastBill integration?

Basic, Plus and Pro. The first 14 days are free.

Your timeline doesn't go anywhere. It's end-to-end encrypted on your own devices. Your employer, your manager, and Half5 can't open it, and no integration gets access. Only customer data and invoices with submitted hours are sent to FastBill.

Go to the trust center