Quick answer
Idaho has lower average 1BR rent ($1,380/mo vs $1,500/mo). State income tax: Idaho (5.8%) vs South Carolina (6.4%) — on a $120K salary that's $720/year difference.
State Comparison · 2026
Idaho vs South Carolina
Side-by-side on state income tax, rent, home prices, climate, and top metros — with specific dollar numbers for every claim.
Last updated: April 23, 2026
Idaho vs South Carolina at a Glance
| Metric | Idaho | South Carolina |
|---|---|---|
| Avg 1BR rent (major metros) | $1,380 ✓ | $1,500 |
| Avg median home price | $445K ✓ | $448K |
| Cheapest city | Boise ($1,380) | Greenville ($1,250) ✓ |
| Priciest city | Boise ($1,380) | Charleston ($1,750) |
| State income tax | 5.8% ✓ | 6.4% |
| Avg walkability | 42/100 | 57/100 ✓ |
| Cities tracked | 1 | 2 |
✓ marks the lower or more favorable value. Averages use the major metros we track in each state.
State Income Tax: Real Savings
What the rate gap actually looks like in your paycheck. Lower rate: Idaho (5.8%).
Salary $80K
$480
/year saved in Idaho
Salary $120K
$720
/year saved in Idaho
Salary $200K
$1,200
/year saved in Idaho
Calculation uses the effective state rate difference × gross salary. Doesn't include property tax, sales tax, or federal impact.
Deep Dive: Each State
Idaho (ID)
Tax reality
Idaho has a 5.8% flat state income tax (moderate). Property tax is low (~0.6% effective). Sales tax 6%. No estate tax. Overall moderate tax burden.
Top cities (1 tracked)
Top drawbacks
- ✕Housing growth has outpaced wage growth. Long-time Idaho residents have been priced out of Boise proper.
- ✕Summer wildfire smoke affects air quality regularly — July through September can have multiple weeks of AQI 150-200+.
- ✕Idaho is deeply conservative politically, with some policy shifts (abortion, LGBTQ+, religion in schools) recently tightening. Boise specifically leans moderate; the rest of the state is more conservative.
South Carolina (SC)
Tax reality
South Carolina top income tax is 6.2% (being reduced to 5.75% over time) and property tax averages ~0.57%. Combined effective tax is moderate. The real cost is rising property insurance — coastal homeowners face 15-25% annual increases due to hurricane risk.
Top cities (2 tracked)
Top drawbacks
- ✕Hurricane/flood risk is real in the Lowcountry — Katrina, Matthew, Florence, Ian all caused significant damage. "Sunny day flooding" in Charleston happens 3-5 times/year now (king tide + sea level rise), closing streets and roads with no storm.
- ✕Extreme summer heat and humidity — July-August regularly hit 92°F+ with 75%+ humidity, making outdoor activity miserable. Heat index routinely 100°F+. This is worse than Alabama due to coastal moisture.
- ✕Insurance costs are spiking coastal — homeowners insurance increased 15-25%+ annually in Charleston area. Flood insurance is separate and expensive. Some insurers are exiting the state entirely.
Frequently Asked Questions
Is Idaho or South Carolina cheaper to live in?
Idaho has lower average 1BR rent across major metros — $1,380/mo vs $1,500/mo in South Carolina, a $120/mo difference. Home prices: Idaho median is $445K vs $448K.
Idaho vs South Carolina: which has lower state income tax?
Idaho has lower state income tax (5.8%) vs 6.4% in South Carolina. On an $80K salary that's $480/year in savings. On $200K, savings grow to $1,200/year.
Should I move from Idaho to South Carolina?
Idaho has a 5.8% flat state income tax (moderate). Property tax is low (~0.6% effective). Sales tax 6%. No estate tax. Overall moderate tax burden.
What are the best cities in Idaho vs South Carolina?
Idaho's largest metros include Boise. South Carolina's largest metros include Charleston, Greenville. Cost of living varies significantly within each state — a Idaho suburb can be 40% cheaper than its flagship city, and vice versa.