1Connecticut
Lowest21.3%
Overall effective tax rate
- Net
- Federal
- State
- FICA
- Federal income tax
- $7,670
- State income tax
- $2,550
- Payroll tax (FICA)
- $5,738
- Total tax
- $15,958
- Net income (annual)
- $59,043
Tax year 2026 · state vs state
Connecticut vs Idaho Income Tax Comparison (2026)
On a $75,000 salary (single filer, 2026), you pay $317 less state income tax a year in Connecticut than in Idaho, which is about $26 a month. At $150,000 the gap is $8 in favor of Idaho.
Connecticut: up to 6.99%Idaho: 5.3% flatUpdated October 10, 2026
Compare Connecticut and Idaho for your income
Estimate for education only, not tax advice. 2026 federal and state rules, standard deductions, no local taxes. How we calculate.
State comparison
Comparing 2 states, sorted by lowest overall tax rate.
2Idaho
21.7%
Overall effective tax rate
- Net
- Federal
- State
- FICA
- Federal income tax
- $7,670
- State income tax
- $2,867
- Payroll tax (FICA)
- $5,738
- Total tax
- $16,274
- Net income (annual)
- $58,726
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💰 Monthly breakdown
Your take-home pay, spread across the year
Connecticut
Monthly gross$6,250
Monthly tax$1,330
Monthly take-home$4,920
Idaho
Monthly gross$6,250
Monthly tax$1,356
Monthly take-home$4,894
Estimates use 2026 federal and state rates, the standard deduction for your filing status and no local taxes. Rankings use state income tax only.
Connecticut vs Idaho: how the two systems differ
| Connecticut | Idaho | |
|---|---|---|
| Wage income tax | Progressive, 7 brackets | Flat 5.3% |
| Top rate | 6.99% | 5.3% |
| Lowest rate | 2% | 5.3% |
| Deductions and credits (single) | $15,000 personal exemption | $16,100 standard deduction |
State income tax and take-home pay at every salary
The same salary can leave you with different take-home pay depending on the state. This table applies each state’s 2026 rules to a single filer with no pre-tax contributions.
| Income | CT state tax | ID state tax | Difference | CT take-home | ID take-home |
|---|---|---|---|---|---|
| $30,000 | $425 | $482 | $57 less in Connecticut | $25,860 | $25,803 |
| $40,000 | $875 | $1,012 | $137 less in Connecticut | $33,445 | $33,308 |
| $50,000 | $1,325 | $1,542 | $217 less in Connecticut | $41,030 | $40,813 |
| $60,000 | $1,775 | $2,072 | $297 less in Connecticut | $48,615 | $48,318 |
| $75,000 | $2,550 | $2,867 | $317 less in Connecticut | $59,043 | $58,726 |
| $100,000 | $3,925 | $4,192 | $267 less in Connecticut | $75,255 | $74,988 |
| $150,000 | $6,850 | $6,842 | $8 less in Idaho | $106,941 | $106,949 |
| $250,000 | $13,025 | $12,142 | $883 less in Idaho | $170,157 | $171,040 |
Single filer, 2026, federal standard deduction. Take-home is after federal, state and payroll tax. No local taxes.
Married filing jointly
| Income | CT state tax | ID state tax | Difference | CT take-home | ID take-home |
|---|---|---|---|---|---|
| $75,000 | $1,795 | $1,758 | $37 less in Idaho | $62,828 | $62,864 |
| $100,000 | $2,920 | $3,083 | $163 less in Connecticut | $81,790 | $81,627 |
| $150,000 | $5,430 | $5,733 | $303 less in Connecticut | $117,755 | $117,452 |
| $250,000 | $11,060 | $11,033 | $27 less in Idaho | $186,408 | $186,435 |
Married filing jointly, 2026, federal standard deduction. Uses each state's joint brackets where they differ.
Does the lower-tax state change as income rises?
For a single filer, Connecticut and Idaho charge the same state income tax (nothing) up to roughly $17,500 of income. Above that, Idaho is the lower-tax state. The order flips again near $25,000, so the better state depends on where your income falls.
Rates side by side
Connecticut (single filers)
| 2% | Up to $10,000 |
| 4.5% | $10,001 to $50,000 |
| 5.5% | $50,001 to $100,000 |
| 6% | $100,001 to $200,000 |
| 6.5% | $200,001 to $250,000 |
| 6.9% | $250,001 to $500,000 |
| 6.99% | Over $500,000 |
Idaho (single filers)
| 5.3% | Over $4,811 |
Full details for each state: Connecticut income tax calculator and Idaho income tax calculator. Federal rates are on the 2026 federal tax brackets page.
Connecticut vs Idaho FAQ
Which has lower income tax, Connecticut or Idaho?+
Connecticut is lower at $75,000: $2,550 of state income tax versus $2,867 in Idaho. At $150,000 it is $6,850 in Connecticut and $6,842 in Idaho. For a single filer, Connecticut and Idaho charge the same state income tax (nothing) up to roughly $17,500 of income. Above that, Idaho is the lower-tax state. The order flips again near $25,000, so the better state depends on where your income falls.
How much more do I keep on $100,000 in Connecticut versus Idaho?+
A single filer keeping $75,255 a year in Connecticut would keep $74,988 in Idaho after federal, state and payroll tax. The difference is $267 a year, or $22 a month.
How do the Connecticut and Idaho income tax systems differ?+
Connecticut uses progressive rates up to 6.99%; Idaho uses a flat 5.3% rate. State deductions and exemptions also differ, which changes how much income is taxed.
Are local taxes included in this Connecticut vs Idaho comparison?+
No. It covers federal income tax, Social Security, Medicare and state income tax only. City, county, sales and property taxes are not included, and they can change the real cost of living in each state.
Should I move from Connecticut to Idaho to save on taxes?+
State income tax is one cost among many. Property and sales taxes, housing, insurance and wages also differ, and you may owe tax to both states in the year you move. Use this comparison as one input and confirm details with a tax professional.
Sources
- Tax Foundation: 2026 state individual income tax rates and brackets
- IRS: Tax inflation adjustments for tax year 2026
Last checked October 10, 2026. Confirm with your state tax agency before filing.
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Estimates for education only, not tax, legal or financial advice. Not a substitute for a tax professional or your state revenue department.