The 2025 statutory rates that drive employer costs — and any PEO quote — in Montana.
| SUI wage base | $45,100 | estimate |
| SUI new-employer rate | 1.70% | estimate |
| SUI cost per employee (at new-employer rate) | $767/yr | |
| FUTA effective rate | 0.6% | verified |
| Workers' comp index (per $100 payroll) | $1.60 | estimate |
| FICA (federal, all states) | 7.65% | verified |
The workers' comp index is a payroll-weighted average — your actual rate depends on class-code mix. Office-heavy firms run well below the index; construction and transportation run well above it.