Why I moved my invoices out of a spreadsheet

Because one simple question was hard to answer: "Where do I stand?" (Wo stehe ich?) So I built one place for it, for myself first. It became EPUfix.

I started with Google Sheets. It's good for a lot of things. For my own businesses it stopped working: I typed in numbers, checked them, and still couldn't see much. My invoices (Rechnungen) were made in different places. I couldn't easily see which ones were paid.

One path, each number typed once

1. OfferThe quote for the work (Angebot).
2. InvoiceOne click turns the offer into an invoice.
3. PaymentRecording the payment books the income and marks the invoice paid.
4. SteuerberaterOne file for the tax advisor when it's time.

On any day I see my profit so far, the money customers still owe me, how close I am to the small business limit (Kleinunternehmergrenze), and an estimate of what to set aside for SVS and income tax.

What I left out on purpose

• No bank sync. You record a payment once, on the invoice, and it's booked.
• No AI guessing categories. You choose, so you know why a number is where it is.
• No double-entry bookkeeping. That stays with the Steuerberater, who it's made for.

It's made for one-person businesses (EPU) in Austria. It doesn't replace a tax advisor. It makes the handoff shorter.