| Index | Thayer | Illinois | National |
| Cost of living | 85 | 98 | 100 |
| Groceries | 98 | 100 | 100 |
| Health care | 101 | 100 | 100 |
| Housing | 53 | 95 | 100 |
| Transportation | 102 | 101 | 100 |
| Utilities | 99 | 99 | 100 |
| Lifestyle & Entertainment | 99 | 100 | 100 |
| Household Items | 99 | 100 | 100 |
| Education & Childcare | 95 | 100 | 100 |

| Cost of living index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index | |
| Lifestyle index | |
| Household index | |
| Educare index |
| Median Income | Per Year | Per Month | Max Budget (28% DTI) | Max Budget (36% DTI) |
| Owners | $92,709 | $7,726 | $2,163 | $2,782 |
| Renters | $29,357 | $2,446 | $685 | $881 |
| State | General Sales Tax | With Max Surtax |
| Illinois | 6.25% | 10.25% |
| State | Income Tax (Low) | Income Tax (High) |
| Illinois | 4.95% | 4.95% |
| City | Population | Cost of Living Index | National Avg. |
| Waggoner, IL | 192 | 80 | 20.2% |
| Nilwood, IL | 196 | 80 | 20.1% |
| Harvel, IL | 253 | 81 | 19.2% |
| Modesto, IL | 227 | 82 | 17.9% |
| Berlin, IL | 189 | 82 | 17.5% |
| Thayer, IL | 635 | 85 | 14.7% |
| City | Population | Cost of Living Index | National Avg. |
| Wheatley, AR | 635 | 80 | 19.7% |
| Pinehurst, GA | 635 | 84 | 16.1% |
| Melbourne, KY | 635 | 87 | 13.4% |
| Killona, LA | 635 | 89 | 10.6% |
| Sherman, MS | 635 | 86 | 13.6% |
| Thayer, IL | 635 | 85 | 14.7% |