Side-by-side tax comparison between Connecticut (6.99% top rate) and South Dakota (no income tax).
| Salary | Connecticut | South Dakota | Difference | Winner |
|---|---|---|---|---|
| $50K | $39,676 | $42,298 | +$2,621 | South Dakota |
| $75K | $57,371 | $61,303 | +$3,932 | South Dakota |
| $100K | $73,648 | $78,890 | +$5,243 | South Dakota |
| $150K | $105,582 | $113,446 | +$7,864 | South Dakota |
| $200K | $138,618 | $149,103 | +$10,485 | 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 Connecticut's 6.99% top rate. At $100K, the difference is $5,243/year — that’s $437/month.
However, cost of living matters. Connecticut has a cost index of 111 while South Dakota is at 92. After adjusting for cost of living, the gap widens significantly.