Portugal vs Iceland
Corporate Tax Comparison
Time of Update: Portugal: 4/04/2026 / Iceland: 4/04/2026
Compare Portugal and Iceland corporate tax rates, filing due dates, withholding tax, VAT, capital gains tax, and effective tax metrics for cross-border company planning.
Portugal vs Iceland Corporate Tax Comparison
Basic Corporate Tax Comparison
Corporate Income Tax (CIT)
Portugal
Iceland
General CIT Rate:
21
General CIT Rate:
20 (for LLCs and limited partnerships); 37.6 (for other entities)
CIT Return Due Date:
The last day of the fifth month after the end of the tax year.
CIT Return Due Date:
31 May
CIT Payment 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 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.
CIT Estimated Payment Due Date:
Except for January and October, prepayments should be made on the first day of each month.
Withholding Tax (WHT)
Portugal
Iceland
Resident Withholding Tax (Dividend/Interest/Royalty):
25/25/25
Resident Withholding Tax (Dividend/Interest/Royalty):
22/22/0
None-Resident Withholding Tax (Dividend/Interest/Royalty):
25/0-25/25
None-Resident Withholding Tax (Dividend/Interest/Royalty):
21/13/22
Value-Added Tax (VAT)
Capital Gain Tax (CGT)
Portugal
Iceland
General Capital Gain Tax Rate:
25 (same as the normal CIT rate for corporations)
General Capital Gain Tax Rate:
20 (for corporations, same as CIT rate for LLCs); 22 (for individuals)
Effective Tax Rate (ETR)
Portugal
Iceland
Composite Effective Average Tax Rate:
28.42%
Composite Effective Average Tax Rate:
18.79%
Composite Effective Marginal Tax Rate:
16.01%
Composite Effective Marginal Tax Rate:
14.93%
