Side-by-side tax comparison between Montana (5.9% top rate) and New Mexico (5.9% top rate).
| Salary | Montana | New Mexico | Difference | Winner |
|---|---|---|---|---|
| $50K | $40,085 | $40,085 | −$0 | Montana |
| $75K | $57,984 | $57,984 | −$0 | Montana |
| $100K | $74,465 | $74,465 | −$0 | Montana |
| $150K | $106,809 | $106,809 | −$0 | Montana |
| $200K | $140,253 | $140,253 | −$0 | Montana |
Montana offers higher take-home pay at every salary level. Montana's 5.9% top rate is more favorable than New Mexico's 5.9%. At $100K, the difference is $0/year — that’s $0/month.
However, cost of living matters. Montana has a cost index of 97 while New Mexico is at 91. With similar costs of living, the tax difference is the main factor.