| Index | Duncan | British Columbia | National |
| Cost of living | 109 | 117 | 100 |
| Groceries | 106 | 106 | 100 |
| Health care | 100 | 100 | 100 |
| Housing | 112 | 139 | 100 |
| Transportation | 103 | 103 | 100 |
| Utilities | 105 | 105 | 100 |
| Lifestyle & Entertainment | n/a | n/a | n/a |
| Household Items | n/a | n/a | n/a |
| Education & Childcare | n/a | n/a | n/a |
| Cost of living index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index | |
| Lifestyle index | |
| Household index | |
| Educare 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% |
| City | Population | Cost of Living Index | National Avg. |
| Ladysmith, BC | 9,354 | 106 | 6.5% |
| North Saanich, BC | 11,587 | 107 | 6.7% |
| Halalt 2, BC | 188 | 107 | 6.8% |
| Cowichan, BC | 2,197 | 107 | 6.9% |
| Cowichan Valley C, BC | 5,466 | 107 | 7.3% |
| Duncan, BC | 5,315 | 109 | 9.2% |
| City | Population | Cost of Living Index | National Avg. |
| Brewton, AL | 5,314 | n/a | |
| Ward, AR | 5,316 | n/a | |
| Saint-Germain-de-Grantham, QC | 5,316 | 85 | 14.6% |
| Lakehills, TX | 5,318 | n/a | |
| Philomath, OR | 5,311 | n/a | |
| Duncan, BC | 5,315 | 109 | 9.2% |