| Index | St. Charles | Idaho | National |
| Cost of living index | 98 | 94 | 100 |
| Index | St. Charles | Idaho | National |
| Goods & Services index | 99 | 99 | 100 |
| Groceries index | 92 | 93 | 100 |
| Health care index | 96 | 96 | 100 |
| Housing index | 102 | 88 | 100 |
| Transportation index | 101 | 108 | 100 |
| Utilities index | 89 | 82 | 100 |
| Cost of living index | |
| Goods & Services index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index |
| Median Income | Per Year | Per Month | Max Budget (28% DTI) | Max Budget (36% DTI) |
| Owners | $51,500 | $4,292 | $1,202 | $1,545 |
| Renters | $0 | $0 | $0 | $0 |
| State | General Sales Tax | With Max Surtax |
| Idaho | 6% | 8.5% |
| State | Income Tax (Low) | Income Tax (High) |
| Idaho | 1.6% | 7.4% |
| Item | St. Charles | National avg. | Difference |
| Haircut | $18.50 | $17.49 | 5.8% |
| Beauty Salon | $33.33 | $38.17 | 12.7% |
| Toothpaste | $2.73 | $2.32 | 17.6% |
| Shampoo | $0.91 | $1.01 | 10.1% |
| Movie | $9.71 | $10.72 | 9.5% |
| Bowling | $16.00 | $13.86 | 15.4% |
| Item | St. Charles | National avg. | Difference |
| Ground Beef | $3.68 | $3.90 | 5.6% |
| Fried Chicken | $1.59 | $1.40 | 13.9% |
| Milk | $1.36 | $1.96 | 30.7% |
| Potatoes | $1.94 | $3.18 | 39.1% |
| Pizza | $10.99 | $10.39 | 5.7% |
| Beer | $8.78 | $9.23 | 4.9% |
| Item | St. Charles | National avg. | Difference |
| Optometrist | $96.00 | $106.34 | 9.7% |
| Doctor | $105.40 | $115.25 | 8.5% |
| Dentist | $92.08 | $98.38 | 6.4% |
| Ibuprofen | $9.50 | $9.26 | 2.6% |
| Lipitor | $497.86 | $466.47 | 6.7% |
| Item | St. Charles | National avg. | Difference |
| Home Price | $187,500.00 | $184,700.00 | 1.5% |
| Avg. Mortgage Payment | $1,191.51 | $1,273.32 | 6.4% |
| Apartment Rent | $0.00 | $949.00 | 100.0% |
| Item | St. Charles | National avg. | Difference |
| Gasoline | $2.81 | $2.59 | 8.3% |
| Tire Balancing | $44.49 | $48.90 | 9.0% |
| Item | St. Charles | National avg. | Difference |
| All Electricity | $131.84 | $167.60 | 21.3% |
| Phone | $184.38 | $163.42 | 12.8% |
| City, State | Population | Cost of Living Index | National Avg. |
| Montpelier, ID | 2,519 | 85 | -15% |
| Paris, ID | 574 | 89 | -11% |
| Bloomington, ID | 220 | 95 | -5% |
| Garden City, UT | 625 | 101 | 1% |
| St. Charles, ID | 122 | 98 | -2% |
| City, State | Population | Cost of Living Index | National Avg. |
| Adak, AK | 122 | 101 | 1% |
| Chilcoot-Vinton, CA | 122 | 85 | -15% |
| Stony Creek, VA | 122 | 93 | -7% |
| Hunt, NY | 122 | 81 | -19% |
| Los Altos, TX | 122 | 83 | -17% |
| St. Charles, ID | 122 | 98 | -2% |