Reviewed for current 2026 law
Montana Child Support Calculator 2026
Apply the current annual allowances and Administrative Rules formula.
Reviewed by SupportDecode Editorial Team Page content reviewed Sources Methodology Update log
child support calculator
Estimated monthly child support: $1,178.00
The paying parent pays this amount to the receiving parent each month.
| Line item | Amount |
|---|---|
| Payer primary allowance shareMontana Child Support Guidelines — ARM 37.62.101–148 (Montana Department of Public Health and Human Services) | $622.58 |
| Payer annual standard-of-living adjustmentMontana Child Support Guidelines — ARM 37.62.101–148 (Montana Department of Public Health and Human Services) | $556.17 |
| Primary-residence transferMontana Child Support Guidelines — ARM 37.62.101–148 (Montana Department of Public Health and Human Services) | $1,178.00 |
Assumptions
- Inputs are monthly income after guideline deductions; the engine annualizes them.
- The 2026 personal allowance, primary allowance, SOLA factors, and presumptive minimum contribution are applied.
- Childcare, insurance, extraordinary needs, other dependents, long-distance travel, and deviations are excluded.
- The payer has no more than 110 days, so no parenting-day adjustment applies.
- The published child-count values apply.
Continue with this income in the PayDecode take-home calculator
PayDecode is a separate site. The link may not carry your numbers over; if its form opens blank, enter the income there again.
Estimate only. The court or state agency calculation controls.
Montana guidelines, effective 2026-02-01.
Montana builds support from allowances and SOLA
Each parent receives a personal allowance, shares the primary child allowance, and contributes a standard-of-living adjustment from remaining income.
A presumptive minimum protects a baseline contribution; an allocation and offset applies above 110 parenting days.
Worked example: two children
- Annualize income after deductions.
- Subtract each personal allowance and allocate the primary need.
- Add each SOLA and apply the parenting-day rule.
The steps above follow the calculation method described on our methodology page.
Enter guideline income after deductions
This is not necessarily paystub gross or take-home pay; complete allowable deductions first.
What this estimate includes
- 2026 allowances
- All SOLA factors
- Minimum contribution
- Parenting-day offset
What it leaves out
- Supplemental needs
- Other dependents
- Long-distance travel
- Deviation
Montana child support calculator FAQs
Is Montana a table state?
It publishes annual allowances, but the final amount is formula-driven.
What is SOLA?
It shares part of each parent’s income remaining after personal and child allowances.
When do days change the transfer?
When at least one child spends more than 110 days with both parents.
Are childcare and insurance included?
They are guideline supplements but are excluded from this streamlined estimate.
How is the monthly amount rounded?
The rule rounds the monthly transfer per child to whole dollars.
Can the minimum be rebutted?
Yes, with an appropriate finding.
Official sources
Official sources last verified: .
- Montana Child Support Guidelines — ARM 37.62.101–148
Montana Department of Public Health and Human Services Last checked
- Montana Child Support Guidelines Tables — CS 404.2
Montana Child Support Services Division Last checked
Changelog: page reviewed . Material changes appear in the update log.