Corporate Tax Comparison

Iceland vs Portugal

Compare Iceland and Portugal corporate tax rates, filing due dates, withholding tax, VAT, capital gains tax, and effective tax metrics for cross-border company planning.

Time of Update — Iceland: 4/04/2026 · Portugal: 4/04/2026

Base Country/Region

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Compare Corporate Tax

Iceland

Portugal

Basic Corporate Tax Comparison

PwC World Tax Summary OECD Statistics

Time of Update — Iceland: 4/04/2026 · Portugal: 4/04/2026

Corporate Income Tax (CIT)

Iceland

Portugal

General CIT Rate:

20 (for LLCs and limited partnerships); 37.6 (for other entities)

General CIT Rate:

CIT Return Due Date:

31 May

CIT Return Due Date:

The last day of the fifth month after the end of the tax year.

CIT Payment Due Date:

November 1st and December 1st

CIT Payment Due Date:

The last day of the fifth month after the end of the tax year.

CIT Estimated Payment Due Date:

Except for January and October, prepayments should be made on the first day of each month.

CIT Estimated Payment Due Date:

Three-stage installment payments due in July, September, and December (if the tax year corresponds to the calendar year). Under certain conditions, the final installment payment may be waived.

Withholding Tax (WHT)

Iceland

Portugal

Resident Withholding Tax (Dividend/Interest/Royalty):

22/22/0

Resident Withholding Tax (Dividend/Interest/Royalty):

25/25/25

Non-Resident Withholding Tax (Dividend/Interest/Royalty):

21/13/22

Non-Resident Withholding Tax (Dividend/Interest/Royalty):

25/0-25/25

Value-Added Tax (VAT)

Iceland

Portugal

General VAT Rate:

Learn More

Value-Added Tax (VAT)

General VAT Rate:

Learn More

Value-Added Tax (VAT)

Capital Gain Tax (CGT)

Iceland

Portugal

General Capital Gain Tax Rate:

20 (for corporations, same as CIT rate for LLCs); 22 (for individuals)

General Capital Gain Tax Rate:

25 (same as the normal CIT rate for corporations)

Effective Tax Rate (ETR)

Iceland

Portugal

Composite Effective Average Tax Rate:

18.79%

Composite Effective Average Tax Rate:

28.42%

Composite Effective Marginal Tax Rate:

14.93%

Composite Effective Marginal Tax Rate:

16.01%

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