Idaho vs South Dakota Cost of Living
Purchasing power
Your $75,000 is worth different amounts in each state
$75,529
in Idaho
$81,699
in South Dakota
Each cell = 1% of purchasing power. Green = value, red = gap.
Spending breakdown
Estimated annual spending on a $75,000 salary
What things actually cost
Real dollar costs side by side
Category breakdown
| Category | Idaho | South Dakota | Difference |
|---|---|---|---|
| Housing | 100.3 | 85.9 | +17% |
| Groceries | 98.9 | 97.7 | +1% |
| Utilities | 73.0 | 85.2 | -14% |
| Transportation | 106.5 | 93.6 | +14% |
| Healthcare | 106.9 | 106.5 | 0% |
| Dining & Misc | 102.4 | 93.4 | +10% |
| Overall | 99.3 | 91.8 | +8% |
Index values relative to national average (100). Positive difference = more expensive in Idaho.
What things actually cost
| Item | Idaho | South Dakota | Difference |
|---|---|---|---|
| Median home price | $420,000 | $285,000 | +$135,000 |
| Average 2BR rent | $1,404/mo | $1,203/mo | +$201 |
| Gas price | $3.41/gal | $3.10/gal | +$0.31 |
| Electric bill | $84/mo | $96/mo | $12 |
| Infant childcare | $9,630/yr | $8,680/yr | +$950 |
Salary equivalent: Idaho → South Dakota
What a Idaho salary buys you in South Dakota, adjusted for cost of living.
| Salary in Idaho | Equivalent in South Dakota | Difference |
|---|---|---|
| $50,000 | $46,224 | +$3,776 |
| $75,000 | $69,335 | +$5,665 |
| $100,000 | $92,447 | +$7,553 |
| $150,000 | $138,671 | +$11,329 |
| $200,000 | $184,894 | +$15,106 |
Positive = your money goes further in South Dakota. Based on overall COL index ratio.
Based on MERIC/C2ER 2025 composite indices. Dollar amounts from AAA, EIA, Zillow, and Child Care Aware.
Overview
Idaho is 8% more expensive than South Dakota overall. Idaho has an index of 99.3 vs 91.8 for South Dakota (national average = 100).
FAQ
Is it cheaper to live in Idaho or South Dakota?
South Dakota is cheaper to live in. Idaho is 8% more expensive overall. The biggest driver is housing — median home prices are $420,000 in Idaho vs $285,000 in South Dakota.
Is South Dakota cheaper than Idaho?
Yes, South Dakota is 8% cheaper than Idaho overall based on the MERIC/C2ER cost-of-living index. Housing, groceries, and utilities all factor into the difference.
Is Idaho more expensive than South Dakota?
Yes, Idaho is 8% more expensive than South Dakota based on the MERIC/C2ER composite index. Housing is typically the largest factor in the difference.
What salary in South Dakota equals $100,000 in Idaho?
To maintain the same purchasing power as a $100,000 salary in Idaho, you would need approximately $92,447 in South Dakota. This is based on the overall cost-of-living index (99.3 vs 91.8).
How do housing costs compare between Idaho and South Dakota?
Housing is significantly cheaper in South Dakota. Median home prices are $420,000 in Idaho vs $285,000 in South Dakota — a $135,000 difference. Average 2-bedroom rent is $1,404/mo vs $1,203/mo.
What costs more in Idaho vs South Dakota?
Housing is 17% higher in Idaho (index 100.3 vs 85.9). Transportation is 14% higher in Idaho (index 106.5 vs 93.6). Utilities is 14% lower in Idaho (index 73 vs 85.2).
Is gas cheaper in Idaho or South Dakota?
Gas averages $3.41/gallon in Idaho and $3.10/gallon in South Dakota — a $0.31 difference per gallon.
Idaho vs South Dakota cost of living — how do they compare?
Idaho has an overall cost-of-living index of 99.3 and South Dakota has 91.8 (national average = 100). Idaho is 8% more expensive overall. Use the calculator above to see how this affects your specific salary.
How do taxes compare between Idaho and South Dakota?
Cost of living is only part of the picture — state income taxes also affect your take-home pay. Idaho has a flat income tax rate of 5.80%, simplified from a progressive system. South Dakota has no state income tax and no corporate income tax. Use the Idaho vs South Dakota paycheck comparison to see how a specific salary compares after federal and state taxes, FICA, and deductions.
Do I need to file state tax returns in Idaho and South Dakota?
Idaho requires residents to file a state income tax return annually, typically due April 15. South Dakota has no state income tax, so residents do not file a state tax return. If you move between states mid-year, you typically file a part-year resident return in each state for the income earned while living there.
Where does this cost of living data come from?
Cost-of-living indices are from the MERIC/C2ER 2025 Annual Average. Dollar amounts use AAA gas prices (March 2025), EIA electricity rates (2024), Child Care Aware childcare costs (2024), Zillow home values (2024-2025), and BEA Regional Price Parities.
Related tools
- Idaho Cost of Living — Housing, groceries, gas, and more
- South Dakota Cost of Living — Housing, groceries, gas, and more
- Idaho vs South Dakota Paycheck Comparison — Compare take-home pay after taxes
- House Affordability in Idaho — How much house can you afford?
- House Affordability in South Dakota — How much house can you afford?
- Idaho Tax Brackets — See 2026 marginal rates
- South Dakota Tax Brackets — See 2026 marginal rates
- Idaho Mortgage Calculator — Estimate monthly payments with local rates
- South Dakota Mortgage Calculator — Estimate monthly payments with local rates
- Idaho Bonus Tax Calculator — See how bonuses are taxed differently
- South Dakota Bonus Tax Calculator — See how bonuses are taxed differently
- Gross-Up Calculator — Find the salary you need to hit a target take-home
- Salary to Hourly Converter — Convert annual salary to hourly rate
- Compare any two states
Based on MERIC/C2ER 2025 composite indices and publicly available price data. Cost of living varies significantly by metro area within a state. These are statewide averages.