Flatex vs DADAT: Which is Better for ETF Investing?
Setting up an investment portfolio in Austria often starts with a rude awakening when you realize that using your favorite broker from home could lead to a massive tax headache. I spent weeks trying to decipher my first Austrian tax return before I realized that "tax-simple" brokers are the only way to survive here without losing your mind. This guide breaks down the Flatex vs DADAT rivalry to help you choose the right platform for your ETFs.
Why You Need an Austrian Steuereinfach Broker
The term "Steuereinfach" is something you will hear constantly in Austrian expat circles, and for good reason. In many countries, you can simply use any international app, trade away, and then report your gains at the end of the year. In Austria, the tax landscape for investments—specifically the 27.5% Kapitalertragsteuer—is notoriously complex, especially when it comes to "Meldefonds" (reporting funds) and "ausschüttungsgleiche Erträge" (deemed distributed income).
When you use a broker that is not based in Austria, like Trade Republic, Revolut, or Scalable Capital, you are responsible for calculating every single penny of tax yourself. This sounds easy until you realize that ETFs in Austria are taxed even if you don't sell them. This "phantom tax" is based on the internal movements of the fund. Without an Austrian broker to handle this, you will likely need to hire a professional tax advisor, which could cost more than your actual investment gains. This is why Taxes in Austria: Finanzamt, Returns, and Brackets 2026 is a topic we discuss so frequently; the administrative burden is simply too high for most casual investors.
Choosing a "Steuereinfach" broker like Flatex or DADAT means the bank automatically calculates the tax, deducts it from your cash account, and sends it to the Finanzamt on your behalf. You get a clean statement at the end of the year, and you don't even have to mention your investments on your annual tax declaration. It’s the ultimate "set it and forget it" solution for people who want to focus on Wealth Building: Investing in ETFs, Stocks, and Real Estate rather than bureaucratic paperwork.
The Hidden Trap of Foreign Brokers
Many newcomers arriving in Vienna or Graz continue using their home-country brokers, thinking they are saving money on transaction fees. The reality hits in April when they realize the Finanzamt expects a detailed breakdown of their ETF’s internal tax data. Because most foreign brokers don't provide an Austrian-specific tax report, you are left staring at a spreadsheet of German or Irish tax data that doesn't align with Austrian law.
If you make a mistake on these filings, you risk fines or, at the very least, an agonizing back-and-forth with tax authorities. By using a local broker, you are essentially paying a small fee for total peace of mind. Even if the interface isn't as "sleek" as a Silicon Valley app, the back-end integration with Money in Austria: Banking, Payments, and Financial Setup is where the real value lies. You aren't just paying for a trade; you are paying for an automated tax service that is compliant with current 2026 regulations.
Understanding the 27.5 Percent KESt Automation
The 27.5% Capital Gains Tax (KESt): Taxation on Stocks and Savings is a flat tax that covers dividends and realized gains. Both Flatex and DADAT are masters of this automation. When your ETF pays out a dividend, you will see the gross amount, a line item for the 27.5% deduction, and the net amount hitting your account. It happens instantly.
The more complicated part is the "Deemed Distributed Income." This is tax on the profits made within the ETF that are reinvested by the fund manager. Austrian brokers receive this data from the OeKB (Oesterreichische Kontrollbank) and will automatically deduct the tax from your cash balance. This is why it is vital to always keep a small "buffer" of cash in your broker account. If your account goes into the negative because of a tax deduction, you might be charged interest. Both Flatex and DADAT will notify you, but Flatex is known for being quite strict with their cash account management.
Flatex: The Powerhouse with an Identity Crisis
Flatex has long been the "default" choice for Austrian investors, primarily because they were the first to offer a truly low-cost, tax-simple brokerage experience. For a long time, they were the undisputed kings, though they have occasionally annoyed their loyal user base with sudden fee changes. Despite this, they remain the most popular choice for expats who want a massive selection of ETFs and a very streamlined "Sparplan" (savings plan) system.
The platform is technically a German company with a massive branch in Austria. This is an important distinction because they have tailored their system specifically to the Austrian tax code. When you sign up, you are funneled into the "Flatex.at" ecosystem, which is separate from their German counterpart. This ensures that your tax data is handled correctly by the Austrian authorities.
Fees Costs and the Infamous Custody Fee History
One of the biggest points of contention with Flatex has been their custody fee (Depotgebühr). A few years ago, they introduced a 0.1% annual fee on the value of your portfolio, which sent many investors running to the competition. However, in response to market pressure and the rise of other competitors, they have since removed this for most standard accounts. As of 2026, the core appeal of Flatex is the lack of a monthly "holding fee," making it very attractive for long-term "buy and hold" investors who don't trade frequently.
The trading fees themselves are relatively transparent. You typically pay a flat fee per trade (usually around 5.90 EUR) plus some small external exchange fees. For an expat who is used to "free" trading apps, this might seem high, but in the context of Opening an Austrian Bank Account: Requirements and Top Banks, these investment fees are quite competitive. Where Flatex truly shines is in their ETF savings plans, where you can automate a monthly investment for as little as 1.50 EUR per execution, and often for 0 EUR if you choose one of their "Premium" partners.
The Premium ETF Partner Network
Flatex has established massive partnerships with ETF providers like Amundi, iShares, and Vanguard. This is a game-changer for someone trying to balance a budget against the Cost of Living in Vienna: Singles vs Families. If you select an ETF from one of their promotional partners, the transaction fee for your monthly savings plan is often waived entirely.
This means you can invest 200 EUR every month into a global diversified fund and pay absolutely nothing in transaction costs. You are only left with the "product costs" (TER) of the ETF itself. This makes Flatex arguably the cheapest option for the "slow and steady" investor. However, you must be careful: if your chosen ETF drops out of the "Premium" partnership, the fees will revert to the standard rate. It’s worth checking your account notifications once or twice a year to ensure your strategy remains cost-effective.
DADAT: The Local Challenger with a Human Face
While Flatex feels like a massive, automated machine, DADAT feels like a bank. DADAT is a brand of Bankhaus Schelhammer & Schattera, a deeply rooted Austrian institution. For many expats, there is a level of comfort in knowing their broker is a "real" Austrian bank with physical roots in the country. If you are already navigating the complexities of Social Insurance Deductions: Where Does Your Gross Pay Go?, you might appreciate the more traditional banking feel that DADAT offers.
DADAT entered the market specifically to challenge Flatex’s dominance, and they have done so by offering aggressive sign-up bonuses and a very clean, user-friendly interface. They often market themselves to "active" investors, but their ETF savings plan options are equally robust.
Pricing Structure and Account Benefits
DADAT’s fee structure is slightly different from Flatex. While they often have a "free" period for new customers (sometimes up to 6 or 12 months with no custody fees), they do eventually charge a small fee for account maintenance. However, many investors find this a fair trade-off for a platform that feels more stable and less prone to the "fee-flipping" that Flatex has been accused of in the past.
The trading fees at DADAT are competitive, often starting around 4.20 EUR for the first few months before moving to a tiered structure based on the volume of the trade. For an ETF investor, the "Sparplan" cost is the most relevant metric. DADAT charges a small percentage or a flat fee per execution, usually around 1.50 EUR plus a small percentage of the order volume. While this can be slightly more expensive than Flatex’s "0 EUR" partners, DADAT offers a sense of "Austrian-ness" and customer service that Flatex sometimes lacks.
User Experience and Customer Support
If you have ever tried to reach Flatex customer support during a market dip, you know it can be a test of patience. DADAT, being a smaller, more localized player, generally receives higher marks for its customer service. For an expat who might have complex questions about their residency status or how their ID Austria and E-Government Tools for Foreign Residents interacts with their bank account, having a responsive support team is invaluable.
The DADAT interface is also widely considered more modern and intuitive than Flatex’s somewhat clinical and dated dashboard. It feels more like a modern fintech app while maintaining the heavy-duty tax backend required by Austrian law. If you value a smooth mobile experience and the ability to call someone who understands the local banking system, DADAT is a very strong contender.
Head-to-Head: Which Broker Wins for Your Strategy?
Choosing between these two comes down to your specific investment behavior. If you are a "hardcore" optimizer who wants to pay the absolute lowest amount in fees and you don't mind a slightly clunky interface, Flatex is likely your winner. Their "Premium Partner" ETF list is hard to beat for cost-efficiency.
On the other hand, if you want a broker that feels like a traditional bank, offers better customer support, and provides a more pleasant user experience—and you are willing to pay a few extra Euros a year for that privilege—DADAT is the way to go. Both will solve your tax problems, which is the most important factor.
| Feature | Flatex Austria | DADAT Bank |
|---|---|---|
| Tax Status | Steuereinfach (Automatic) | Steuereinfach (Automatic) |
| Custody Fee | 0 EUR (mostly) | Free initially, then small fee |
| ETF Savings Plan | From 0 EUR (Premium Partners) | Usually ~1.50 EUR + % |
| Standard Trade | ~5.90 EUR + ext. fees | ~4.20 EUR (promo) to 10+ EUR |
| Interface | Functional, bit dated | Modern, bank-like |
| Support | Mostly ticket-based, slow | Very responsive, local |
The Impact of ID Austria on Your Onboarding
Opening these accounts has become significantly easier thanks to ID Austria and E-Government Tools for Foreign Residents. In the past, you often had to do a "PostIdent" or a video call that frequently failed due to lighting or connection issues. Now, both Flatex and DADAT allow you to use your ID Austria to verify your identity almost instantly.
This digital integration means you can go from "thinking about investing" to having a fully functional, tax-compliant Austrian brokerage account in about 15 minutes. Just make sure you have your Austrian tax number (Finanzamt-Steuernummer) or your Social Security number handy, as these are mandatory for the "Steuereinfach" reporting to function correctly. Once you are set up, you can stop worrying about the Finanzamt and start focusing on your long-term financial future in this beautiful country.
Important Disclaimer Regarding Financial Advice
The information provided in this guide is for educational and informational purposes only and does not constitute professional financial, investment, or tax advice. While every effort has been made to ensure the accuracy of the fees and regulations mentioned for 2026, banking terms and Austrian tax laws are subject to change. Always consult with a qualified tax advisor or financial professional before making significant investment decisions, especially regarding your specific residency status and tax liabilities in Austria. Investing in the stock market involves risk, including the potential loss of principal.
