| Index | Duncan | British Columbia | National |
| Cost of living | 87 | 123 | 100 |
| Goods & Services | 110 | 110 | 100 |
| Groceries | 102 | 102 | 100 |
| Health care | 102 | 102 | 100 |
| Housing | 44 | 170 | 100 |
| Transportation | 102 | 102 | 100 |
| Utilities | 103 | 103 | 100 |
| Cost of living index | |
| Goods & Services index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index |
| State | General Sales Tax | With Max Surtax |
| British Columbia | 7% | 12% |
| State | Income Tax (Low) | Income Tax (High) |
| British Columbia | 5.06% | 16.8% |
| Item | Duncan | National avg. | Difference |
| Personal Care | $108.00 | $94.33 | 14.5% |
| Recreation | $110.00 | $102.33 | 7.5% |
| Item | Duncan | National avg. | Difference |
| Meat, Poultry and Fish | $106.00 | $102.27 | 3.7% |
| Dairy Products and Eggs | $100.00 | $104.67 | 4.5% |
| Bakery and Cereal Products | $102.00 | $111.67 | 8.7% |
| Fruit and Vegetables | $104.00 | $113.40 | 8.3% |
| Alcoholic Beverages | $111.00 | $105.80 | 4.9% |
| Item | Duncan | National avg. | Difference |
| Doctor | $97.00 | $101.07 | 4.0% |
| Item | Duncan | National avg. | Difference |
| Home Price ($) | $n/a | $659,395.00 | 100.0% |
| Apartment Rent ($) | $1,225.00 | $2,146.00 | 42.9% |
| Item | Duncan | National avg. | Difference |
| Gasoline | $133.00 | $102.07 | 30.3% |
| Item | Duncan | National avg. | Difference |
| All Electricity | $101.00 | $98.60 | 2.4% |
| City | Population | Cost of Living Index | National Avg. |
| Ladysmith, BC | 9,354 | 92 | 8.1% |
| Cowichan, BC | 2,197 | 92 | 7.6% |
| Tsussie 6, BC | 119 | 94 | 5.5% |
| North Cowichan, BC | 32,420 | 95 | 5.5% |
| Theik 2, BC | 43 | 95 | 5.2% |
| Duncan, BC | 5,315 | 87 | 12.7% |
| City | Population | Cost of Living Index | National Avg. |
| Tellico Village, TN | 5,314 | n/a | |
| Saint-Germain-de-Grantham, QC | 5,316 | 72 | 28.3% |
| Palmerton, PA | 5,317 | n/a | |
| La Habra Heights, CA | 5,318 | n/a | |
| Lee Acres, NM | 5,318 | n/a | |
| Duncan, BC | 5,315 | 87 | 12.7% |