California vs Colorado Taxes
Compare the total tax burden between California (1% – 13.3%) and Colorado (4.4% flat). Enter your income to see which state saves you more.
| Tax Component | California | Colorado |
|---|---|---|
| Federal Tax | $13,170 | $13,170 |
| State Tax | $5,055 | $3,692 |
| FICA | $7,650 | $7,650 |
| Total Tax | $25,875 | $24,512 |
| Take-Home | $74,125 | $75,488 |
| Effective Rate | 25.87% | 24.51% |
| Annual Difference | $1,363 more | $1,363 less |
The $1,363 difference is primarily because California has a progressive income tax with rates up to 13.3%, while Colorado has a flat 4.4% income tax. At your income level, California's marginal rate is 9.3% vs Colorado's 4.4%.
Why the difference
You'd save $1,363/year ($114/month) in Colorado vs California.
Tax structure
California uses progressive brackets up to 13.3%, while Colorado has a flat 4.4% state income tax.
Effective rate at your income
At $100,000, Colorado's effective state rate is 3.7% vs 5.1% in California — a 1.4 percentage point gap.
Tip: California's progressive brackets mean your effective rate is much lower than 13.3% for most earners. At $100,000, the effective state rate is approximately 5.8%. Consider maximizing 401(k) contributions and HSA to reduce California-taxable income.
Tip: Colorado's flat rate has been gradually declining through TABOR-related adjustments. The state standard deduction matches the federal ($15,750 single), keeping effective rates low. TABOR refunds provide an additional tax benefit in years when state revenue exceeds limits.
California Total Tax
$25,87525.87% effective rate
Colorado Total Tax
$24,51224.51% effective rate
Annual Savings
$1,363by living in Colorado
Tax at Different Income Levels
| Income | California Total Tax | Colorado Total Tax | Annual Savings |
|---|---|---|---|
| $75,000 | $16,182 | $15,999 | Save $183 |
| $100,000 | $25,875 | $24,512 | Save $1,363 |
| $150,000 | $45,914 | $42,101 | Save $3,813 |
| $200,000 | $65,428 | $59,165 | Save $6,263 |
Based on single filer, standard deduction, 2026 tax year. Includes federal income tax, state income tax, and FICA.
Why the difference
You'd save $1,363/year ($114/month) in Colorado vs California.
Tax structure
California uses progressive brackets up to 13.3%, while Colorado has a flat 4.4% state income tax.
Effective rate at your income
At $100,000, Colorado's effective state rate is 3.7% vs 5.1% in California — a 1.4 percentage point gap.
Tip: California's progressive brackets mean your effective rate is much lower than 13.3% for most earners. At $100,000, the effective state rate is approximately 5.8%. Consider maximizing 401(k) contributions and HSA to reduce California-taxable income.
Tip: Colorado's flat rate has been gradually declining through TABOR-related adjustments. The state standard deduction matches the federal ($15,750 single), keeping effective rates low. TABOR refunds provide an additional tax benefit in years when state revenue exceeds limits.
Understanding Each State
California
California has the highest top marginal state tax rate in the US at 13.3%, with progressive brackets starting at 1%. An additional 1% Mental Health Services Tax applies to incomes over $1 million. Despite high taxes, California's economy — tech, entertainment, agriculture — attracts top talent globally. Under OBBBA, the SALT deduction cap rose to $40,000 for 2025 and $40,400 for 2026 (half that if MFS), but is cut by 30 cents for every dollar of MAGI above $500,000 for 2025 ($505,000 for 2026), down to a $10,000 floor — so the highest-income California itemizers see only partial federal relief.
Tip: California's progressive brackets mean your effective rate is much lower than 13.3% for most earners. At $100,000, the effective state rate is approximately 5.8%. Consider maximizing 401(k) contributions and HSA to reduce California-taxable income.
Colorado
Colorado has a flat income tax rate of 4.4% for both 2025 and 2026. The rate was 4.55% in 2020, 4.5% in 2021, 4.4% in 2022-2023, and dipped to 4.25% for 2024 alone on a TABOR surplus refund before returning to 4.4%. Colorado's TABOR amendment limits government revenue growth, resulting in periodic taxpayer refunds when revenue exceeds limits. The state offers a generous standard deduction matching the federal amount.
Tip: Colorado's flat rate has been gradually declining through TABOR-related adjustments. The state standard deduction matches the federal ($15,750 single), keeping effective rates low. TABOR refunds provide an additional tax benefit in years when state revenue exceeds limits.
Key Comparison Points
Income tax structure: California has a progressive income tax (1% – 13.3%), while Colorado has a flat income tax (4.4% flat).
Beyond income tax: State tax comparisons should also consider property tax rates, sales tax, and cost of living. A state with no income tax may have higher property or sales taxes that offset the savings.
SALT deduction cap: Under OBBBA, the 2026 federal SALT cap is $40,400, phasing out above $505,000 MAGI toward a $10,000 floor. This limits the federal tax benefit of living in a high-tax state, so the gross state tax difference remains close to the net difference for most earners — especially high earners inside the phaseout.
Frequently asked questions
Is it cheaper to live in California or Colorado?
Based on income tax alone, Colorado has a lower tax burden. At $100K income, you'd save $1,363 annually in Colorado compared to California. However, total cost of living also depends on property taxes, sales taxes, and housing costs.
How much would I save moving from California to Colorado?
A single filer earning $100,000 would save approximately $1,363 per year in total taxes by living in Colorado instead of California. At $150,000 income, the savings change to $3,813 per year.
What is the income tax rate in California?
California has a progressive income tax with rates of 1% – 13.3%.
What is the income tax rate in Colorado?
Colorado has a flat income tax with rates of 4.4% flat.