Side-by-side comparison of income tax, property tax, sales tax, capital gains, and retirement treatment between Connecticut and Idaho for tax year 2026. Use the calculator below to estimate how much you would save (or pay) after relocating.
| Tax | Connecticut | Idaho |
|---|---|---|
| State income tax (effective) | 6.00% | 5.80% |
| Long-term capital gains | 6.90% | 5.80% |
| Property tax (effective) | 2.14% | 0.67% |
| Combined sales tax | 6.35% | 6.20% |
| Retirement income | partial-exempt | ss-exempt |
| Income system | progressive | flat |
Connecticut total tax
$21,349
Idaho total tax
$21,106
Connecticut state tax
$5,979
Idaho state tax
$5,736
Difference
−$243
Idaho saves you money
As % of income
0.20%
Federal tax is identical in both columns and excluded from the difference. Numbers use 2026 IRS brackets, state effective rates, and the 3.8% NIIT where applicable.
Moving from Connecticut to Idaho could save about $243 per year on this profile — roughly 0.20% of gross income.
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