Moving from St. Louis to Idaho Falls (2026)
Idaho Falls has a COL index of 87 vs 87 for St. Louis (100 = US average). Expect to pay about 0% more for the same lifestyle.
Key differences
Salary needed in Idaho Falls to match your St. Louis lifestyle
Based on the 0% cost of living increase between the two cities.
| Your salary in St. Louis | Equivalent in Idaho Falls |
|---|---|
| $40K | $40,000 |
| $50K | $50,000 |
| $60K | $60,000 |
| $75K | $75,000 |
| $80K | $80,000 |
| $100K | $100,000 |
| $120K | $120,000 |
| $150K | $150,000 |
Monthly budget at $75K — St. Louis vs Idaho Falls
| Expense | St. Louis | Idaho Falls |
|---|---|---|
| Monthly take-home | $4,447 | $4,378 |
| 1BR rent | $1,300 | $1,100 |
| Groceries | $369 | $365 |
| Transport | $75 | $35 |
| Utilities | $162 | $142 |
| Internet | $60 | $65 |
| Left after essentials | $2,481 | $2,671 |
Frequently asked questions
Is Idaho Falls cheaper than St. Louis?
No. Idaho Falls has a cost of living index of 87 vs 87 for St. Louis (100 = US average). That's about 0% more expensive.
How much will I save moving from St. Louis to Idaho Falls?
On a $75K salary, moving from St. Louis to Idaho Falls could save roughly $259/month on core expenses. That's ~$3,108/year.
What salary do I need in Idaho Falls to match my St. Louis lifestyle?
To maintain the same purchasing power as $75,000 in St. Louis, you'd need roughly $75,000/year in Idaho Falls. This is based on the overall COL index difference between the two cities.
Estimates based on Q1 2026 COL index and market data. Budget uses simplified federal/state tax rates at $75K. Zillow · BLS · Numbeo · For general guidance only