Austrian Flat-Rate Capital Gains Tax in 2027: What the Reform Changes for Investors

Around 1.9 million Austrians now hold a securities account — up 41% on 2020. As the investor base has grown, so has the visibility of the tax complexity: Austria's capital gains tax (KESt) is widely regarded as one of the hardest taxes for private individuals to administer, especially for those running multiple accounts at home and abroad. That is what the federal government's reform proposal, due to take effect from the 2027 tax year, sets out to address.

The consultation draft was published by the finance ministry on 23 May 2026. It introduces a flat-rate tax as an opt-in alternative, leaves the existing KESt logic in place as the default, and introduces a year-to-year loss carry-forward for the first time. For many retail investors, it is the most tangible change to capital-markets taxation since the 2012 KESt overhaul.

What the reform actually proposes

At its core, every taxpayer will be able, from 2027, to choose between two regimes: the existing detailed approach with automatic KESt or annual Anlage KAP filings, or a new flat-rate model.

Under the flat-rate model, investors pay a fixed annual levy of 1.2% of portfolio value as at 31 December, regardless of realised gains or losses. In return, capital gains tax on distributions, deemed distributions and realised gains disappears entirely. Anyone choosing the flat-rate option is locked in for at least three years.

For context: 1.2% of portfolio value corresponds, at an assumed long-term equity return of 7%, to roughly 17% effective taxation — clearly below today's 27.5% on realised gains. In years of falling prices, however, the flat-rate investor pays anyway.

Second, the tax base of the standard regime is opened up: losses in a given year can be carried forward up to seven years — a long-standing demand from retail-investor associations. Until now, losses that could not be offset in the same year simply expired.

Third, the flat-rate model removes the obligation to file an Anlage KAP for foreign accounts. That directly affects around 280,000 investors using Interactive Brokers, DEGIRO, Saxo or Scalable Capital — currently a major source of tax-return errors.

Who wins, who loses

The impact depends heavily on the investor profile. The following examples illustrate the range.

Profile A — the buy-and-hold ETF saver. A 38-year-old civil servant in Linz holds EUR 80,000 in a globally diversified ETF, buys monthly, and realises no gains. Today she pays KESt only on deemed distributions — typically 0.5-1% of portfolio value a year, around EUR 400-800 in tax. Under the flat-rate model she would pay EUR 960. A modest loser, by around EUR 200 a year.

Profile B — the active trader. A 51-year-old self-employed man in Graz holds EUR 200,000 in a mixed portfolio, realises an average of EUR 25,000 in gains and EUR 8,000 in losses a year. Today he pays KESt on net gains — around EUR 4,675. Under the flat-rate model he would pay EUR 2,400. A clear winner, saving around EUR 2,300 a year.

Profile C — the heir in the drawdown phase. A 67-year-old retiree in Salzburg inherited EUR 500,000 and plans to hold it in an ETF portfolio over the next ten years and draw it down gradually. Selling EUR 50,000 a year with an assumed 30% gain component currently incurs around EUR 4,125 in KESt. Under the flat-rate model it would be EUR 6,000. A loser by around EUR 1,875 a year.

A rule of thumb emerges: those who realise a lot and trade with high turnover tend to benefit. Buy-and-hold investors with accumulating ETFs typically face small disadvantages under the flat-rate option — though they can count the administrative simplification as a non-monetary benefit.

The structural effects in detail

In our view, the reform will trigger several second-order effects not explicitly named in the consultation draft.

First: a shift towards foreign brokers. The exemption from the Anlage KAP for flat-rate users lowers the effective barrier to using DEGIRO, Interactive Brokers and Scalable Capital. Observers expect those providers to gain two to three percentage points of market share within 24 months of the reform taking effect — at the expense of Erste Bank, Raiffeisen and Bank Austria.

Second: greater willingness to realise gains. Investors taxed at a flat rate no longer have an incentive to defer gains for tax reasons. That should structurally lift turnover on the Vienna Stock Exchange — a Vienna University of Economics study from April 2026 estimates the impact at 8-12%. A clear win for market-makers and for market quality (tighter spreads).

Third: pressure on Austria as a fund domicile. Under the flat-rate model, there is no longer a tax advantage to Austrian reporting funds versus US index funds. The relevance of the OeKB Profitool could erode within a few years for this investor group. Vienna-based providers — ETF Securities Austria, Erste Asset Management — would find themselves competing on pure distribution, no longer on tax.

What investors should check now

Roughly 18 months remain before the flat-rate model takes effect in 2027. Useful concrete steps:

First: prepare an overview of your realisation history over the past three years. If your average annual realisation rate exceeds 6% of portfolio value, the flat-rate model is likely to be advantageous.

Second: check whether a potential loss carry-forward from 2026 makes sense. Anyone with unused losses can deploy them over seven years from 2027 — provided they stay in the standard regime.

Third: if you hold a foreign account, clarify with your broker whether an Anlage KAP is still required for 2026. Special rules apply during the 2026/2027 transition and are still being worked out in detail.

There is no blanket recommendation. The finance ministry is planning to launch an official calculation tool on FinanzOnline in autumn 2026, allowing investors to simulate their historical tax profile and identify the better regime.

What happens next

The consultation period ends on 4 July 2026. A Council of Ministers reading is planned for September 2026, with parliamentary adoption expected by year-end. The first flat-rate elections would then be available from the 2027 tax year.

The political alignment is worth noting: retail-investor associations and the FMA have broadly welcomed the draft, while the trade union federation and Chamber of Labour are pressing for adjustments to the flat-rate level. In informal exchanges, the European Commission has signalled that the model does not raise state-aid issues.

This is not, in the end, a pure tax cut. For most ETF savers, the reform is revenue-neutral or marginally negative. Its primary value is simplification. Whether that simplification justifies the administrative effort of switching is a calculation each investor will have to do for themselves.