Who actually qualifies
Austria's finance and customs authority, the BMF, ties eligibility to what your passport or travel document actually shows: a domicile outside the European Union. That is the threshold the system checks, not simply your nationality, so the document you present has to make that residence clear.
The purchase itself has to clear 75 euros on the invoice, a figure the BMF states as the invoiced amount, possibly including VAT. That is a per-invoice threshold, so a single receipt needs to reach it rather than your total spending across a shopping day.
What the shop has to give you
The retailer issues an invoice that meets the requirements of the Austrian VAT Act. BMF's own materials point to Form U34 as an example of the kind of document used for this, though the essential requirement is that the invoice itself is compliant, not that it takes one specific printed form.
Ask for this at the point of sale rather than afterward, and settle how you intend to pay in Austria at the same time, since not every retailer runs the paperwork the same way.
How the digital check at the airport actually works
Vienna International Airport moved away from a manual customs stamp on 1 September 2021, replacing it with what Austria's own guidance calls Digital Export Validation, or DEV. You submit your required documents at the DEV service desk, and the system performs an electronic validation of the data based on risk criteria that the tax and customs authorities have set.
The outcome is one of two things: an exit confirmation, generally documented electronically rather than by a physical stamp, or a denial that comes with further instructions for how to proceed. Austria's guidance is explicit that the digital export confirmation this produces is equivalent to the original stamped document and can be used directly as proof of the tax exemption, so you are not left holding a lesser form of evidence than a traveller who went through a manual desk somewhere else.
Because this is an electronic check against risk criteria rather than a human visually inspecting every invoice, what actually gets scrutinised on any given day is not something BMF publishes in detail, so do not assume your particular documents will or will not be flagged.
The deadline and what it means in practice
Goods must leave the EU before the end of the third calendar month following the month of purchase. A purchase made on the first of a month effectively gets nearly four months of runway; one made on the last day of a month gets closer to three, since the clock counts by calendar month rather than by exact date of purchase.
Where the refund actually comes from
BMF's guidance points to the seller as the party that processes the refund. At some border crossings, the same materials mention that private clearance offices have been set up to handle the refunding procedure on a traveller's behalf, for a fee. That is a commercial arrangement between you and that office, not a state-run refund desk, and the exact fee is not something the ministry's page discloses, so treat any percentage you are quoted as coming from the operator, not from Austrian tax law.
If your shopping in Vienna runs toward higher-value items, such as porcelain, glass or wafers still made locally, the choice between waiting for the seller directly and using a faster paid clearance office is worth deciding before you get to the airport, not while you are standing in line.
What commonly goes wrong
The most avoidable mistake is arriving at the DEV desk without having actually initiated the digital check ahead of time, if the retailer's system supports that. A second is checking purchased goods into hold luggage before completing export validation, since a denial that routes you to a manual process may require the items to be produced, and by then they can be out of reach.
A third is timing against the three-month deadline loosely: if a purchase falls near the start of a long trip that also includes stops outside Austria, it is easy to lose track of which calendar month the clock started counting from.
What this guide does not cover
This guide focuses on Digital Export Validation as it operates at Vienna International Airport, since that is the crossing point BMF's own materials describe in the most detail. It does not cover export through Austria's land borders or its other airports, where a manual customs stamp rather than DEV may still be the standard process, and it does not cover VAT refund claims made by businesses, which run through a separate procedure at the BMF with its own forms.
What to check before you rely on this
The 75-euro minimum and the DEV system described here apply specifically to purchases exported through Austria and, in the case of DEV, to Vienna Airport. If you are departing through a different Austrian border crossing, or well after this was checked, confirm the current procedure directly with BMF or Zoll rather than assuming this description still holds.