Side-by-side tax comparison between Montana (5.65% top rate, graduated) and New Mexico (5.9% top rate, graduated). See which state lets you keep more at every salary level, and how cost of living changes the picture.
Montana uses a graduated income tax (4.7-5.65%) while New Mexico has a graduated system (1.5-5.9%). On a $100K salary, Montana takes $3,673 in state and local taxes compared to New Mexico’s $3,835 \u2014 a difference of $163.
Both states use graduated brackets, but New Mexico’s top rate of 5.9% is higher than Montana’s 5.65%.
Montana wins at 10 out of 10 salary levels tested. The advantage exists but is modest across the income spectrum.
| Salary | Montana | New Mexico | Difference | Winner |
|---|---|---|---|---|
| $40K | $32,851 | $32,786 | −$65 | Montana |
| $50K | $40,519 | $40,438 | −$81 | Montana |
| $60K | $48,187 | $48,089 | −$98 | Montana |
| $75K | $58,783 | $58,661 | −$122 | Montana |
| $100K | $75,453 | $75,290 | −$163 | Montana |
| $120K | $88,788 | $88,593 | −$195 | Montana |
| $150K | $108,242 | $107,999 | −$244 | Montana |
| $200K | $141,542 | $141,217 | −$325 | Montana |
| $250K | $174,083 | $173,677 | −$406 | Montana |
| $300K | $204,311 | $203,824 | −$488 | Montana |
Take-home pay only tells part of the story. Montana has a cost of living index of 97 while New Mexico is at 91 (national average = 100).
The cost of living gap is moderate. After adjustment, $100K has purchasing power of $77,786 in Montana vs $82,736 in New Mexico. However, New Mexico actually provides better purchasing power despite Montana’s take-home advantage.
For a single earner at $100K filing jointly, take-home becomes $81,038 in Montana and $80,875 in New Mexico \u2014 a difference of $163. The gap remains similar regardless of filing status.
On paper, moving from New Mexico to Montana would save $163/year on a $100K salary, or $813 over 5 years. But relocation involves real costs: moving expenses, potentially buying/selling a home, changing jobs, and adjusting to a new community.
At $163/year, the tax difference alone likely isn’t worth relocating for. Other factors — job market, lifestyle, family — should drive the decision. The tax savings are a nice bonus if you’re already considering the move for other reasons.