● Beta 0.5

Real numbers on every Austrian apartment listing.

Buyer fees, mortgage payment, heating cost — directly on Willhaben and ImmoScout24.at. Built for Austria.

Local in your browserAustrian lawFreeOpen Beta

What it shows

Grunderwerbsteuer, Eintragungsgebühr, Notar, Maklerprovision, Pfandrecht — every line, with the law cited.

Apply the BGBl I 110/2023 exemption (≤€500k, until 06/2026). Savings shown instantly.

Annuity with sliders for down payment, rate, term. FMA tragability check inline.

Yearly + monthly cost from the listing's HWB. Tariffs from E-Control Q1/2026.

How it works

Open a listing

Any apartment on willhaben.at or immobilienscout24.at.

Click the icon

The METROX icon lights up on supported pages.

Read the numbers

Fees, mortgage and heating appear instantly. Slide to model your scenario.

Install

Web Store review takes a few days. Install manually until then:

01
Download the .zip
Click the button above.
02
Unzip the file
macOS: double-click. Windows: right-click → Extract All.
03
Open Chrome extensions
Paste in the address bar:chrome://extensions
04
Load unpacked
Toggle Developer mode → Load unpacked → select the unzipped folder.

When Google approves, a one-click 'Add to Chrome' replaces this section.

Current scope

✓Apartments on Willhaben and ImmoScout24.at — Austria only.

—Houses, plots and Bauträger projects skip the calculator for now.

Privacy

Your data stays on your device.

Calculations run inside Chrome. The extension never sends listing data to METROX, the portals, or any third party. No cookies. No tracking.

Beta

● Beta 0.5

Version 0.5. Detection or numbers may be off. If something looks wrong, tell us.