Iceland vs Portugal
Corporate Tax Comparison
Time of Update: Iceland: 4/04/2026 / Portugal: 4/04/2026
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.
Iceland vs Portugal Corporate Tax Comparison
Basic Corporate Tax Comparison
Corporate Income Tax (CIT)
Iceland
Portugal
General CIT Rate:
20 (for LLCs and limited partnerships); 37.6 (for other entities)
General CIT Rate:
21
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
None-Resident Withholding Tax (Dividend/Interest/Royalty):
21/13/22
None-Resident Withholding Tax (Dividend/Interest/Royalty):
25/0-25/25
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%
