United States vs Iceland
Corporate Tax Comparison
Time of Update: United States: 4/04/2026 / Iceland: 4/04/2026
Compare United States and Iceland corporate tax rates, filing due dates, withholding tax, VAT, capital gains tax, and effective tax metrics for cross-border company planning.
United States vs Iceland Corporate Tax Comparison
Basic Corporate Tax Comparison
Corporate Income Tax (CIT)
United States
Iceland
General CIT Rate:
Federal corporate income tax: 21%. State CIT ranges from 1% to 10% (although some states do not impose CIT) and is deductible from the federal CIT.
General CIT Rate:
20 (for LLCs and limited partnerships); 37.6 (for other entities)
CIT Return Due Date:
1. April 15th (Federal income tax);
2. Income tax is usually due on the same date as federal income tax, but there are a few cases where the dates are different.
2. Income tax is usually due on the same date as federal income tax, but there are a few cases where the dates are different.
CIT Return Due Date:
31 May
CIT Payment Due Date:
As of the 15th day of the 12th month of the tax year.
CIT Payment Due Date:
November 1st and December 1st
CIT Estimated Payment Due Date:
Throughout the year, four equal instalments of estimated tax should be paid on the 15th day of the fourth, sixth, and ninth months of the tax year, and on the 15th day of the first month of the following year (April 15, June 15, September 15, and January 15).
CIT Estimated Payment Due Date:
Except for January and October, prepayments should be made on the first day of each month.
Withholding Tax (WHT)
United States
Iceland
Resident Withholding Tax (Dividend/Interest/Royalty):
0/10/3
Resident Withholding Tax (Dividend/Interest/Royalty):
22/22/0
None-Resident Withholding Tax (Dividend/Interest/Royalty):
30/30/30
None-Resident Withholding Tax (Dividend/Interest/Royalty):
21/13/22
Value-Added Tax (VAT)
Capital Gain Tax (CGT)
United States
Iceland
General Capital Gain Tax Rate:
21% (aligned with the federal 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)
United States
Iceland
Composite Effective Average Tax Rate:
22.69
Composite Effective Average Tax Rate:
18.79%
Composite Effective Marginal Tax Rate:
7.03
Composite Effective Marginal Tax Rate:
14.93%
