| Index | Shelby | Montana | National |
| Cost of living | 89 | 101 | 100 |
| Goods & Services | 90 | 104 | 100 |
| Groceries | 100 | 103 | 100 |
| Health care | 93 | 98 | 100 |
| Housing | 77 | 99 | 100 |
| Transportation | 103 | 109 | 100 |
| Utilities | 93 | 93 | 100 |


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| 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 | $65,500 | $5,458 | $1,528 | $1,965 |
| Renters | $27,292 | $2,274 | $637 | $819 |
| State | General Sales Tax | With Max Surtax |
| Montana | 0% | 0% |
| State | Income Tax (Low) | Income Tax (High) |
| Montana | 1% | 6.75% |
| Item | Shelby | National avg. | Difference |
| Haircut | $15.71 | $24.26 | 35.2% |
| Beauty Salon | $37.87 | $45.56 | 16.9% |
| Toothpaste | $4.19 | $3.70 | 13.3% |
| Shampoo | $1.16 | $1.28 | 9.2% |
| Movie | $12.99 | $12.13 | 7.1% |
| Bowling | $16.78 | $18.00 | 6.8% |
| Item | Shelby | National avg. | Difference |
| Ground Beef | $6.31 | $5.84 | 8.0% |
| Fried Chicken | $1.59 | $1.57 | 1.2% |
| Milk | $4.55 | $4.67 | 2.5% |
| Potatoes | $4.61 | $4.93 | 6.5% |
| Pizza | $12.03 | $12.09 | 0.5% |
| Beer | $10.57 | $10.41 | 1.5% |
| Item | Shelby | National avg. | Difference |
| Optometrist | $105.94 | $125.68 | 15.7% |
| Doctor | $115.67 | $135.78 | 14.8% |
| Dentist | $112.63 | $113.29 | 0.6% |
| Ibuprofen | $10.57 | $10.65 | 0.7% |
| Lipitor | $444.64 | $468.60 | 5.1% |
| Item | Shelby | National avg. | Difference |
| Home Price | $155,500.00 | $184,700.00 | 15.8% |
| Avg. Mortgage Payment | $1,553.45 | $2,346.69 | 33.8% |
| Apartment Rent | $557.00 | $949.00 | 41.3% |
| Item | Shelby | National avg. | Difference |
| Gasoline | $3.37 | $3.46 | 2.5% |
| Tire Balancing | $69.17 | $59.92 | 15.4% |
| Item | Shelby | National avg. | Difference |
| All Electricity | $176.82 | $193.99 | 8.9% |
| Phone | $182.36 | $192.25 | 5.1% |
| City | Population | Cost of Living Index | National Avg. |
| Shelby, MT | 2,875 | 89 | 11.2% |
| City | Population | Cost of Living Index | National Avg. |
| Homer, LA | 2,875 | 81 | 19.0% |
| Harrisburg, AR | 2,874 | 80 | 19.6% |
| Syracuse, IN | 2,874 | 84 | 15.9% |
| Brandenburg, KY | 2,874 | 95 | 4.8% |
| Saint-Isidore, QC | 2,874 | n/a | |
| Shelby, MT | 2,875 | 89 | 11.2% |