Side-by-side tax comparison between Colorado (4.4% top rate) and South Dakota (no income tax).
| Salary | Colorado | South Dakota | Difference | Winner |
|---|---|---|---|---|
| $50K | $40,648 | $42,298 | +$1,650 | South Dakota |
| $75K | $58,828 | $61,303 | +$2,475 | South Dakota |
| $100K | $75,590 | $78,890 | +$3,300 | South Dakota |
| $150K | $108,496 | $113,446 | +$4,950 | South Dakota |
| $200K | $142,503 | $149,103 | +$6,600 | South Dakota |
South Dakota offers higher take-home pay at every salary level. With no state income tax, South Dakota gives you a significant advantage over Colorado's 4.4% top rate. At $100K, the difference is $3,300/year — that’s $275/month.
However, cost of living matters. Colorado has a cost index of 105 while South Dakota is at 92. After adjusting for cost of living, the gap widens significantly.