Side-by-side tax comparison between New Mexico (5.9% top rate) and South Dakota (no income tax).
| Salary | New Mexico | South Dakota | Difference | Winner |
|---|---|---|---|---|
| $50K | $40,085 | $42,298 | +$2,213 | South Dakota |
| $75K | $57,984 | $61,303 | +$3,319 | South Dakota |
| $100K | $74,465 | $78,890 | +$4,425 | South Dakota |
| $150K | $106,809 | $113,446 | +$6,638 | South Dakota |
| $200K | $140,253 | $149,103 | +$8,850 | 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 New Mexico's 5.9% top rate. At $100K, the difference is $4,425/year — that’s $369/month.
However, cost of living matters. New Mexico has a cost index of 91 while South Dakota is at 92. With similar costs of living, the tax difference is the main factor.