Corporate Income Tax in Austria

This skill covers how Austria taxes companies: who is liable, the rate, the minimum tax, the taxable base (losses, the participation exemption, the interest limit, group taxation), the return, prepayments, surcharges and interest, and the tax on dividends a company pays or receives. All statute text was read on RIS (the federal legal information system) on 23 October 2026, in the version in force on that day unless a row says otherwise. Tax year 2026 means the calendar year 2026, or a financial year that ends in 2026.

What is new for 2026: nothing in the 23% rate, the minimum tax or the loss limit. The interim tax of a private foundation rises from 23% to 27.5% from calendar year 2026 (KStG § 22(2)). Already enacted by the Budgetbegleitgesetz 2027-2028 (BGBl. I Nr. 62/2026), for later years only: the clearing-account rule in KStG § 8(2a), from financial years ending in 2027 (§ 26c Z 101), and a 24% rate on income above EUR 1,000,000, from financial years starting after 31 December 2027 (§ 22(1) and § 26c Z 102). Neither applies to 2026.

Related skills: at-transfer-pricing (arm's length prices with related companies, hidden distributions, master file and local file), at-cross-border (residence, exit tax, withholding on payments abroad under § 99 EStG), at-income-tax (the shareholder's own income tax), at-company-formation (choosing and founding the company), at-vat-return. This skill does not repeat them.

Who this applies to

• Unlimited liability. A body with its management (Geschäftsleitung) or its seat (Sitz, § 27 BAO) in Austria is taxed on all its Austrian and foreign income (KStG § 1(2)). One of the two is enough. Bodies are domestic private-law legal persons and comparable foreign entities, commercial operations of public bodies (Betriebe gewerblicher Art), and associations, institutions, foundations and other funds without legal personality.
• Limited liability. A body with neither management nor seat in Austria is taxed only on certain Austrian income (KStG § 1(3) Z 1). See at-cross-border for what counts as Austrian income.
• All income is business income for a company that must keep accounts because of its legal form (GmbH, AG, FlexCo), for cooperatives that must keep accounts, and for comparable foreign bodies with unlimited liability (KStG § 7(3)).
• Partnerships are not KöSt taxpayers. An OG or KG is transparent; its partners pay income tax or KöSt on their share. See at-income-tax.
• Private foundations (Privatstiftungen) have their own interim tax: 27.5% from 2026 on income under § 13(3) and (4) (KStG § 22(2)). Not covered further here.

Rates, bands and thresholds

Item	Rate or amount	Year	Source
KöSt rate on income (unlimited and limited taxpayers)	23%	Calendar years from 2024 (24% in 2023)	KStG § 22(1): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=22
KöSt rate, enacted for later years	23% up to EUR 1,000,000 of income; 24% on the part above EUR 1,000,000. Applies to unlimited taxpayers and to limited taxpayers under § 1(3) Z 1; limited taxpayers under § 1(3) Z 2 and 3 stay at 23% (§ 22(1a)). Foreign income exempt in Austria is left out when testing the EUR 1,000,000	Financial years starting after 31 December 2027; for a tax group, the group parent's financial years starting after that date	KStG § 22(1) as amended by BGBl. I Nr. 62/2026, § 26c Z 102 lit. a and b: https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=26c
Surcharge where the company does not name the recipient of a payment on request	25% of the amount, on top of KöSt	2026	KStG § 22(3)
Minimum tax (Austrian companies with share capital and comparable foreign companies with unlimited liability)	5% of one quarter of the legal minimum share capital, for each full calendar quarter of unlimited liability	2026	KStG § 24(4) Z 1: https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=24
Legal minimum share capital of a GmbH	EUR 10,000 (since BGBl. I Nr. 179/2023)	2026	GmbHG § 6(1): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10001720&Paragraf=6
Minimum tax of a GmbH	EUR 125 a quarter, EUR 500 a year	2026	KStG § 24(4) Z 1 with GmbHG § 6(1)
Legal minimum share capital of an AG	EUR 70,000	2026	AktG § 7: https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10002070&Paragraf=7
Minimum tax of an AG	EUR 875 a quarter, EUR 3,500 a year	2026	KStG § 24(4) Z 1 with AktG § 7
Minimum tax of a foreign company with no legal minimum capital, or one below the GmbH minimum	As for a GmbH: EUR 500 a year	2026	KStG § 24(4) Z 1, second sentence
Minimum tax of banks and insurers in company form	EUR 1,363 a quarter	2026	KStG § 24(4) Z 2
Loss offset limit for carried-forward losses	75% of the total income (Gesamtbetrag der Einkünfte)	2026	KStG § 8(4) Z 2 lit. a: https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=8
International participation (internationale Schachtelbeteiligung)	At least one tenth of the capital, held without a break for at least one year	2026	KStG § 10(2): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=10
Switch-over to credit (Methodenwechsel): low taxation	Effective foreign tax below 15%	2026	KStG § 10a(3) and (7): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=10a
Switch-over: portfolio holdings it also reaches	At least 5% (dividends under § 10(1) Z 5 or 6)	2026	KStG § 10a(7)
Group taxation: financial link	More than 50% of the capital and of the voting rights, for the whole financial year of the member	2026	KStG § 9(4) and (5): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=9
Group taxation: minimum life	Three financial years of twelve months each	2026	KStG § 9(10)
Group taxation: foreign members' losses counted	Up to 75% of the sum of the own incomes of all Austrian members and the group parent	2026	KStG § 9(6) Z 6
Interest limit (Zinsschranke)	Net interest expense deductible up to 30% of tax EBITDA; at least EUR 3,000,000 a year in any case	2026	KStG § 12a(1): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=12a
Interest limit: equity ratio escape	Full deduction if the company's equity ratio is at least the group's, or up to 2 points below it	2026	KStG § 12a(5)
Interest limit: carryforwards	Unused interest: carried forward on application, no time limit stated. Unused EBITDA capacity: five following years	2026	KStG § 12a(6)
Clearing-account receivable against an individual shareholder, not settled at the balance sheet date	Treated as an open distribution to the extent it exceeds EUR 50,000	Financial years ending in 2027 onwards (not 2026)	KStG § 8(2a) as amended by BGBl. I Nr. 62/2026, § 26c Z 101
KESt on a distribution, general rate	27.5%	2026	EStG § 27a(1) Z 2: https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004570&Paragraf=27a
KESt the payer may withhold when the recipient is a company (§ 1(1) KStG)	23%	Income received from 2024	EStG § 93(1a): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004570&Paragraf=93
No KESt on dividends to a company holding at least 10%	Exempt at source; for an EU parent (Annex 2 EStG) only after one year without a break	2026	EStG § 94 Z 2: https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004570&Paragraf=94
Combined burden on profit paid out to an individual shareholder	44.175% (23% + 27.5% x 77%)	2026	Arithmetic from KStG § 22(1) and EStG § 27a(1) Z 2
Prepayments	One quarter each on 15 February, 15 May, 15 August and 15 November	2026	EStG § 45(2) with KStG § 24(3) Z 1: https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004570&Paragraf=45
Prepayment uplift on the last assessed tax	+4% for the first year after the assessed year, +5% for each further year	2026	EStG § 45(1)
Late-filing surcharge (Verspätungszuschlag)	Up to 10% of the tax assessed; not set below EUR 50	2026	BAO § 135: https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=135
Interest on assessed differences (Anspruchszinsen)	2% a year above the base rate (Basiszinssatz), from 1 October of the following year, for at most 48 months; not set below EUR 50	2026	BAO § 205(1) and (2): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=205
Base rate (Basiszinssatz), so the Anspruchszinsen rate	2.03% from 16 September 2026, so 4.03%; 1.53% from 11 June 2025 to 15 September 2026, so 3.53%. The rate moves with the ECB main refinancing rate: check it on the day	2026	OeNB, Basis- und Referenzzinssätze: https://www.oenb.at/isawebstat/stabfrage/createReport?lang=DE&report=2.1
Late-payment surcharges (Säumniszuschläge)	2%, then 1% and 1% more after three and six months of enforceability; not set below EUR 50	2026	BAO § 217(2), (3) and (10): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=217

The taxable base

1. Start from the accounts. For a GmbH, AG or FlexCo all income is business income (KStG § 7(3)). The profit is taken from the UGB accounts and adjusted under the EStG and KStG.
2. Distributions do not reduce income. Income is the same whether it is kept, paid out openly or paid out as a hidden distribution (KStG § 8(2)). A price that favours a shareholder is added back; the method is in at-transfer-pricing.
3. Clearing accounts, from 2027. For financial years ending in 2027 or later, a receivable on the clearing account (Verrechnungskonto) against an individual shareholder, or a person close to the shareholder, must be settled by the balance sheet date. Indirect holdings count. Turning it into a written loan at arm's length (written agreement, interest paid as it runs, a duty to repay) also counts as settling it. If it is not settled, the amount above EUR 50,000 is treated as openly distributed and received on the day after the resolution to prepare the accounts (§ 222(1) UGB), and at the latest "nach fünf Monaten" (KStG § 8(2a); § 26c Z 101). The five months are the period § 222(1) UGB gives for preparing the accounts, which runs from the balance sheet date: for a 31 December 2027 year-end, the deemed distribution falls on 31 May 2028 at the latest (Budget Committee report, 561 d.B. XXVIII. GP, on § 8(2a)). The EUR 50,000 threshold applies whatever the size of the holding. That brings in KESt at 27.5% (see at-transfer-pricing for the gross-up when the company bears it). It does not apply to 2026 year-ends.
4. Exempt participation income (§ 10(1)). Exempt are:
   • Z 1 to 4: profit shares of every kind from Austrian companies and cooperatives (shares, profit participation rights, participation capital). The law sets no minimum holding.
   • Z 5: the same from a foreign company that meets the conditions of Annex 2 EStG (the EU Parent-Subsidiary Directive 2011/96/EU), if Z 7 does not apply.
   • Z 6: the same from a foreign company comparable to an Austrian company, resident in a state with comprehensive administrative assistance with Austria, if Z 7 does not apply.
   • Z 7: profit shares of every kind from an international participation.
5. International participation (§ 10(2) and (3)). A company that holds, in the form of capital shares, at least one tenth of a foreign company comparable to an Austrian company (or of an EU company under Annex 2 EStG), without a break for at least one year, has an international participation. The one-year period does not restart for shares from a capital increase that does not raise the percentage. On top of the dividend exemption, gains, losses and other value changes on the holding are tax-neutral. The company can opt, in the return for the year it acquires the holding, to make value changes taxable; the option can be made up or withdrawn only within one month of filing, by correcting the return (§ 10(3) Z 1 and 2). Actual and final losses on liquidation or insolvency of the subsidiary stay deductible, reduced by tax-free dividends of the last five years.
6. What the exemption does not cover.
   • Deductible dividends (§ 10(4)). Profit shares under § 10(1) Z 5 to 7 are taxable to the extent the foreign company could deduct them.
   • Switch-over (§ 10a(7)). For an international participation, and for a holding of at least 5% whose dividends fall under § 10(1) Z 5 or 6, the exemption and the tax neutrality are replaced by taxation with credit of the foreign tax if the foreign company is low-taxed (effective foreign tax below 15%, § 10a(3)) and its business focus is earning passive income (interest, royalties, taxable dividends and share gains, financial leasing, banking and insurance, low-value re-invoicing, § 10a(2)). Controlled foreign company rules (Hinzurechnungsbesteuerung) under § 10a(1) Z 1 and (4) apply where the low-taxed company's passive income is more than one third of its income, the Austrian company (with associated enterprises) holds more than 50% of the votes or capital or is entitled to more than 50% of the profits, and the foreign company carries on no substantial economic activity (staff, equipment, assets, premises); the Austrian company must prove the substance. The foreign tax is credited on application (§ 10a(9)).
   • Note. In earlier law the switch-over sat in § 10(4) and (5). In the version in force today § 10(4) is the deductible-dividend rule above and there is no § 10(5); the switch-over is § 10a.
7. Losses. A loss that cannot be used in the year is carried forward under § 18(6) EStG and deducted in later years as a special expense, but only up to 75% of the total income of the year. What cannot be deducted moves to the following years under the same limit (KStG § 8(4) Z 2 lit. a). No time limit appears in the law. The 75% limit does not apply to the extent the total income contains gains from a debt waiver (including restructuring gains under § 23a), gains in years affected by insolvency proceedings, gains on the sale or closure of a business, part of a business or a partnership share, liquidation gains under § 19, amounts recaptured under § 9(6) Z 7 KStG or § 2(8) Z 4 EStG, or amounts under § 6 Z 6 EStG (except those under § 6 Z 6 lit. a last sentence) (lit. b). Losses are lost where the company's identity changes through a substantial change of its organisational and economic structure together with a substantial paid change of shareholders (Mantelkauf), unless done to restructure the company and keep a substantial part of the jobs. Losses stay deductible to the extent hidden reserves are realised for tax by the end of the financial year of the change (lit. c).
8. Interest limit (§ 12a). Net interest expense (interest expense over taxable interest income, including all payments for raising debt) is deductible only up to 30% of tax EBITDA (total income before § 12a, with tax depreciation and write-ups and the net interest expense added back), but always up to EUR 3,000,000 a year. A standalone company is outside the rule: one that is not fully consolidated in group accounts, has no associated enterprise under § 10a(4) Z 2 and has no foreign permanent establishment (§ 12a(2)). A fully consolidated company can deduct everything if its equity ratio is at least the group's or no more than 2 points below it (§ 12a(5)). Unused interest is carried forward on application; unused EBITDA capacity is carried forward, also on application, for five years (§ 12a(6)).
9. Group taxation (§ 9). Austrian companies and cooperatives under § 7(3), plus comparable foreign companies resident in the EU or in a state with comprehensive administrative assistance that are linked only to Austrian members or the group parent, can be members (§ 9(2)). The financial link is more than 50% of the capital and of the votes, directly, through a partnership or through other members, held for the whole financial year of the member (§ 9(4) and (5)). The income of each Austrian member is added to the member or parent above it. A foreign member brings in only its losses, worked out under Austrian rules and capped at the loss under foreign law, and only up to 75% of the sum of the own incomes of all Austrian members and the parent; the rest is carried forward by the parent (§ 9(6) Z 6). Foreign losses are added back as profit when they are, or could be, offset against foreign profits, and in full when the foreign member leaves the group (§ 9(6) Z 7). The group must last three twelve-month financial years; a member that leaves earlier is taxed as if it had never joined (§ 9(10)).
10. Minimum tax. It is payable in loss years too. In a later year, the minimum tax paid above the actual KöSt is credited like a prepayment, but only to the extent that year's actual KöSt exceeds that year's minimum tax (KStG § 24(4) Z 4). If the legal form changes during a quarter, the form at the start of the quarter counts (§ 24(4) Z 1).

Deadlines and filing

What	When	Source
KöSt return for 2026 (K 1 for companies that keep accounts, K 2 for other unlimited taxpayers, K 3 for limited taxpayers)	30 April 2027 on paper; 30 June 2027 if filed electronically. A company with unlimited liability must file electronically unless it lacks the technical means	BAO § 134(1); KStG § 24(3) Z 1
Extension in a single case	On a reasoned application; if refused, at least one more week	BAO § 134(2)
Return filed by a tax adviser under the quota system (Quotenregelung)	At the latest 31 March 2028 for tax year 2026; §§ 134 and 135 BAO do not apply while this time is used. The tax office can extend this to 30 June 2028 for all returns still due from one adviser (§ 134a(3)). The share of returns each adviser must file by set earlier dates is fixed by BMF regulation (§ 134a(5) Z 3)	BAO § 134a(1), (3) and (5): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=134a
Prepayments for 2026	15 February, 15 May, 15 August and 15 November 2026, a quarter each, based on the last assessed KöSt plus the uplift. The minimum tax is due for each full calendar quarter of unlimited liability in any case	EStG § 45(1) and (2); KStG § 24(3) Z 1 and (4) Z 1
Change of the prepayment for the current year	The tax office cannot change it after 30 September unless the company applied by 30 September	EStG § 45(3)
Balance after the assessment notice	Within one month of the notice, where the tax was assessed later than one month before it fell due	BAO § 210(4): https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=210
Voluntary payment on account to avoid Anspruchszinsen	Any time, and more than once (Anzahlung)	BAO § 205(3)
Tax group application (form G 4)	Signed by the legal representatives of the parent and every Austrian member before the end of the financial year for which it is to take effect; filed with the parent's tax office within one calendar month of the last signature	KStG § 9(8)
KESt on a dividend paid	Withheld when the dividend is paid; paid over within one week (see at-transfer-pricing for § 96 EStG)	EStG §§ 93, 95, 96

Penalties and interest

• Late filing. If the return is late and the delay is not excusable, the tax office can add up to 10% of the tax assessed. Amounts under EUR 50 are not set (BAO § 135). The surcharge does not apply where the adviser's quota deadline under § 134a is used.
• Late payment. 2% of tax not paid by the due date; 1% more if still unpaid three months after it became enforceable, and another 1% three months after that. Surcharges under EUR 50 are not set (BAO § 217(2), (3) and (10)).
• Anspruchszinsen. A difference between the assessed KöSt and the prepayments carries interest at 2% a year above the base rate (4.03% from 16 September 2026), from 1 October of the year after the tax year (for 2026, from 1 October 2027) until the notice, for at most 48 months. Amounts under EUR 50 are not set (BAO § 205(1) and (2)). A payment on account under § 205(3) reduces it.
• Unnamed recipients. 25% surcharge on payments whose recipient the company will not name on request (KStG § 22(3)).
• Late-payment and interest rules on cross-border items (withholding under § 99 EStG) are in at-cross-border.

Cross-border points

• Dividends paid to a company abroad. KESt is 27.5%, or 23% where the payer uses § 93(1a) EStG for a company recipient. No KESt is withheld where the recipient is an EU company meeting Annex 2 EStG, holding at least 10% directly or indirectly, and the holding has lasted without a break for at least one year (EStG § 94 Z 2). For a domestic company shareholder the 10% test applies with no holding period. The minister can require withholding in abuse cases and on hidden distributions by regulation (§ 94 Z 2, last sentence); the regulation and the refund route are in at-transfer-pricing. Treaty relief and refunds are in at-cross-border.
• Dividends received from abroad. See the exemptions in "The taxable base", steps 4 to 6. A holding under 10%, or held for less than a year, can still be exempt under § 10(1) Z 5 or 6, but without tax-neutral gains and losses.
• Foreign group members. Only first-tier foreign companies, resident in the EU or a state with comprehensive administrative assistance, linked only to Austrian members (KStG § 9(2)). Losses only, capped as above.
• Transfer pricing. Prices with related companies abroad must be at arm's length (§ 6 Z 6 EStG and treaty Article 9). The method, documentation and adjustments are in at-transfer-pricing.
• Residence of the company and exit tax. Moving the seat or management abroad, and taxing a non-resident's Austrian income, are in at-cross-border.
• Payments abroad. Withholding at 20% or 27.5% on royalties, consulting fees and similar payments to foreign businesses under § 99 EStG is in at-cross-border.
• Global minimum tax. The Mindestbesteuerungsgesetz (BGBl. I Nr. 183/2023) for groups with revenue of EUR 750 million or more is outside this skill. § 10a(3) KStG counts a qualified domestic top-up tax paid abroad when it tests low taxation.

Worked examples

Example 1: GmbH with EUR 400,000 profit and a EUR 500,000 loss carried forward (tax year 2026)

Gamma GmbH has a 2026 profit for tax purposes of EUR 400,000. It has no other income, so its total income (Gesamtbetrag der Einkünfte) is EUR 400,000. It carries forward EUR 500,000 of losses from earlier years, worked out from proper books. None of its 2026 income is of a kind listed in § 8(4) Z 2 lit. b (no restructuring gain, no sale of a business, no liquidation), and there has been no change of shareholders.

The loss deduction is capped at 75% of total income: 400,000 x 75% = EUR 300,000. Taxable income is 400,000 - 300,000 = EUR 100,000. KöSt at 23% is EUR 23,000. That is above the GmbH minimum tax of EUR 500, so the minimum tax does not bite. EUR 200,000 of losses move to 2027 under the same 75% limit. Prepayments made for 2026 are credited against the EUR 23,000, and any balance is due one month after the notice. If the balance is assessed after 1 October 2027, Anspruchszinsen run from that date.

name: Gamma GmbH, 2026, profit EUR 400,000 with EUR 500,000 loss carried forward
inputs:
  total_income: 400000
  loss_brought_forward: 500000
  loss_limit_pct: 75
  kost_rate_pct: 23
  minimum_tax_gmbh: 500
steps:
  - loss_cap: total_income * loss_limit_pct / 100
  - loss_used: min(loss_brought_forward, loss_cap)
  - taxable_income: total_income - loss_used
  - kost: taxable_income * kost_rate_pct / 100
  - tax_payable: max(kost, minimum_tax_gmbh)
  - loss_carried_to_2027: loss_brought_forward - loss_used
expected:
  loss_cap: 300000
  loss_used: 300000
  taxable_income: 100000
  kost: 23000
  tax_payable: 23000
  loss_carried_to_2027: 200000

Example 2: dividend from a 15% EU subsidiary held for 18 months (tax year 2026)

Delta GmbH, an Austrian company, has held 15% of an operating company resident in another EU member state for 18 months, without a break. In 2026 it receives a dividend of EUR 120,000. The subsidiary is comparable to an Austrian company and could not deduct the dividend in its own state. It runs a trading business, so its business focus is not passive income.

15% is at least one tenth and 18 months is more than one year, so the holding is an international participation (KStG § 10(2)). The dividend is exempt under § 10(1) Z 7. Austrian KöSt on it is nil. A later gain or loss on selling the shares is tax-neutral too, unless Delta opted in the return for the year it acquired the holding to make value changes taxable (§ 10(3)).

The exemption would fall away to the extent the subsidiary could deduct the dividend (§ 10(4)): the full EUR 120,000 would then be taxed at 23%, which is EUR 27,600. If instead the subsidiary were low-taxed (below 15% effective) and mainly earned passive income, the switch-over in § 10a(7) would apply: the dividend becomes taxable with credit of the foreign tax.

name: Delta GmbH, 2026, dividend from 15% EU subsidiary held 18 months
inputs:
  dividend: 120000
  holding_pct: 15
  months_held: 18
  min_holding_pct: 10
  min_months: 12
  kost_rate_pct: 23
steps:
  - holding_test_margin: holding_pct - min_holding_pct
  - period_test_margin: months_held - min_months
  - exempt_amount: dividend
  - taxable_dividend: dividend - exempt_amount
  - kost_on_dividend: taxable_dividend * kost_rate_pct / 100
  - kost_if_deductible_abroad: dividend * kost_rate_pct / 100
expected:
  holding_test_margin: 5
  period_test_margin: 6
  exempt_amount: 120000
  taxable_dividend: 0
  kost_on_dividend: 0
  kost_if_deductible_abroad: 27600

Ask the client first

• Is it a GmbH, FlexCo, AG or another body, where are its seat and its real management, and does its financial year end on 31 December? This decides liability, the minimum tax and which year the 2027 and 2028 changes first hit.
• What losses are carried forward, from which years, and has the shareholding or the business changed? This decides the 75% offset and the Mantelkauf test.
• For each holding in another company: country, percentage, date acquired, whether the option under § 10(3) was made, and how the subsidiary is taxed and what it earns. This decides the exemption and the switch-over.
• Is the company in a tax group, or could it form one (more than 50% of capital and votes for a full year)? Was a G 4 application filed?
• Is the company part of consolidated group accounts, and what is its net interest expense? This decides the interest limit.
• Does an individual shareholder owe the company money on a clearing account, and how much? From 2027 year-ends, more than EUR 50,000 unsettled at the balance sheet date is a distribution.

Sources

Source	URL	Read on
Körperschaftsteuergesetz 1988 (KStG) § 1	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=1	2026-10-23
KStG § 7	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=7	2026-10-23
KStG § 8 (current version; § 8(2a) is in it from 30 July 2026 and applies from financial years ending in 2027)	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=8	2026-10-23
KStG § 9	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=9	2026-10-23
KStG § 10	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=10	2026-10-23
KStG § 10a	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=10a	2026-10-23
KStG § 12a	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=12a	2026-10-23
KStG § 22 (current, and the version from 1 January 2028)	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=22	2026-10-23
KStG § 24	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=24	2026-10-23
KStG § 26c (Z 101 and 102, BGBl. I Nr. 62/2026)	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004569&Paragraf=26c	2026-10-23
GmbH-Gesetz § 6	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10001720&Paragraf=6	2026-10-23
Aktiengesetz § 7	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10002070&Paragraf=7	2026-10-23
Einkommensteuergesetz 1988 (EStG) § 27a	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004570&Paragraf=27a	2026-10-23
EStG § 45	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004570&Paragraf=45	2026-10-23
EStG § 93	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004570&Paragraf=93	2026-10-23
EStG § 94	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10004570&Paragraf=94	2026-10-23
Bundesabgabenordnung (BAO) § 134	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=134	2026-10-23
BAO § 134a	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=134a	2026-10-23
BAO § 135	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=135	2026-10-23
BAO § 205	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=205	2026-10-23
BAO § 210	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=210	2026-10-23
BAO § 217	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10003940&Paragraf=217	2026-10-23
Unternehmensgesetzbuch (UGB) § 222	https://www.ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Gesetzesnummer=10001702&Paragraf=222	2026-10-23
Budget Committee report on the Budgetbegleitgesetz 2027-2028 (561 d.B. XXVIII. GP), notes on § 8(2a) and § 22(1) KStG	https://www.parlament.gv.at/dokument/XXVIII/I/561/fname_1768090.pdf	2026-10-23
OeNB, Basis- und Referenzzinssätze	https://www.oenb.at/isawebstat/stabfrage/createReport?lang=DE&report=2.1	2026-10-23
BMF form catalogue (K 3, G 4)	https://service.bmf.gv.at/service/anwend/formulare/show_mast.asp?s=g4	2026-10-23

Not yet confirmed: the percentages and dates in the BMF quota regulation under § 134a(5) BAO; how KESt withheld on a domestic dividend to a company holding under 10% is credited or refunded in the assessment; the minimum tax of an SE (Article 4 of Regulation (EC) No 2157/2001 was not read); the KStR 2013 guidance on §§ 9, 10, 10a and 12a, which was not read for this refresh.