Colorado

State Income Tax

4.4%

Flat Rate

Exempt

Social Security

2026-04-15

Filing Deadline

Flat

Structure

Full Tax Details

Has Income TaxYes

Tax StructureFlat Rate

Rate4.4%

Single Standard Deduction$15,000

Married Standard Deduction$30,000

Single Personal ExemptionN/A

Married Personal ExemptionN/A

Taxes Social SecurityExempt

Taxes Retirement IncomeYes

Filing Deadline2026-04-15

Retirement Income Details

Social Security fully deductible for 65+; pension exclusion of $20k (55-64) or $24k (65+).

Official Payment Portal

Colorado Department of Revenue

Last verified: 2026-03-31 · Always consult a tax professional before making financial decisions.