Montana uses the Hybrid model to calculate child support, which means elements of both the Income Shares and Percentage of Income models are used.
This state uses a hybrid model that combines elements of both the Income Shares and Percentage of Income approaches. The exact formula may vary based on income levels, with different calculation methods applied at different income thresholds. This can make calculations more complex but aims to provide a fairer result across different income levels.
The Montana child support guidelines provide specific tables and formulas that courts use to determine the appropriate amount. Judges can deviate from these guidelines in special circumstances, but the calculated amount is the presumptive starting point.
For the official guidelines, visit the Montana child support guidelines.
Income for child support typically includes wages, salary, bonuses, commissions, self-employment income, rental income, investment returns, retirement payments, Social Security benefits, disability payments, and trust distributions.
Importantly, courts in Montana can look beyond what appears on a tax return. If a parent is self-employed or owns a business, the court can examine business records, bank statements, and lifestyle evidence to determine true income. Personal expenses paid by a business, unreported cash income, and excessive business deductions can all be added back as income for child support purposes.
Read our complete guide to what counts as income →
In Montana, you can request a modification of child support when there has been a material change in circumstances. This typically includes:
To file a modification in Montana:
The Montana Child Support Enforcement Division can help with modification requests. Visit their website at Montana Child Support Enforcement Division.
Read our step-by-step modification guide →
Official Montana child support calculation guidelines and tables.
State agency that handles child support enforcement and services.
Search Montana business registrations and filings.
Learn what evidence Montana courts accept for proving hidden income.
Find business filings and property records that may reveal hidden income.
This information is for educational purposes only and is not legal advice. Child support laws in Montana may change. Consult a licensed Montana attorney for advice specific to your situation.