Fixed-fee invoicing, automated.

The problem

Why fixed-fee billing breaks most invoicing tools

Fixed-fee is simple to invoice and brutal to make money on. You agreed a number. You bill the number. Done — your invoicing tool is happy. But fixed-fee margin is set the day you quote, and it only stays intact if the scope does. It never does. The “quick extra page,” the fourth round of revisions, the feature that “was basically already in there” — each one chips the margin you locked in at quote.

And here's the killer stat: 57% of agencies lose $1k–$5k a month to scope creep, and only 1% bill all the extra work (Ignition 2025 Agency Pricing & Cash Flow Report). Everyone else just eats it. Your invoicing tool is no help here. It bills the fixed number and has no idea the scope moved. The whole problem of fixed-fee — the gap between what was quoted and what got delivered — happens in the work, where your billing tool can't see. So the extra never becomes a line item. It becomes free work.

How Handl handles it

Handl bills the agreed fee on schedule like any tool — then does the part that actually protects your margin: it watches the hours against the budget and tells you the day the project starts to slip.

• Bills the fixed amount on schedule

  Deposit, midpoint, on completion — whatever you agreed. Handl drafts each invoice on its date for you to send, and syncs it to Xero or QuickBooks.

• Warns you before the budget runs out

  Hours land from your time tracker against the fixed fee. When the project hits 80% of its budget, or a milestone uses up its hours, you get an alert — while there's still time to talk to the client.

• Shows the real margin on every fixed fee

  Hours, rates and costs roll up into margin per project, so you can see which fixed-fee work pays and quote the next one from real numbers.

• Chases the milestone payments

  Deposit overdue? Final invoice ignored? The AI billing agent handles the reminders so you don't have to nag.

You quoted that margin for a reason. Handl makes sure the work you actually did is the work you actually bill for.