Montana Divorce Financial Disclosure: What You Must Disclose and How

Montana requires both spouses to exchange comprehensive financial information during a dissolution — and the court will not finalize your case until you do. The Preliminary Disclosure of Income and Expenses (MP-510) is one of the most misunderstood documents in the Montana dissolution process, largely because of one unusual rule: it is served on your spouse but never filed with the court.

The MP-510: Served, Not Filed

Unlike the Petition (MP-112/113), Summons (MP-400), and Proposed Property Distribution (MP-500), which are all filed with the Clerk of District Court and become part of the public record, the MP-510 income and expense disclosure goes only to the other spouse. This privacy protection prevents sensitive financial details — salary, bank account balances, monthly expenses — from becoming publicly accessible court documents.

This rule trips up pro se filers constantly. Some file the MP-510 with the court (exposing their finances publicly), while others skip it entirely (stalling their case). Neither is correct.

What the MP-510 Requires

The Preliminary Disclosure of Income and Expenses form requires a thorough accounting of your financial situation:

Income sources:

• Gross wages or salary from employment
• Self-employment income (net of business expenses)
• Rental income, royalties, or investment returns
• Social Security, retirement, or pension payments
• Child support or maintenance received from a prior relationship
• Any other regular income source

Monthly expenses:

• Housing (rent/mortgage, property taxes, insurance, HOA)
• Utilities (electric, gas, water, internet, phone)
• Food and household supplies
• Transportation (car payments, fuel, insurance, maintenance)
• Health care (insurance premiums, out-of-pocket costs, prescriptions)
• Childcare and education costs
• Debt payments (credit cards, student loans, personal loans)
• Insurance premiums (life, disability)

Assets and debts:

• Current balances of all bank and investment accounts
• Estimated equity in real estate
• Retirement account balances
• Vehicle values minus outstanding loans
• Total outstanding debt by category

When to Exchange Disclosures

Both parties must exchange MP-510 disclosures regardless of the filing path:

• Individual petition: the petitioner serves the MP-510 on the respondent along with the initial petition packet. The respondent serves their own MP-510 on the petitioner along with (or shortly after) their Response (MP-201)
• Joint petition: both co-petitioners must exchange MP-510s with each other before requesting finalization, even though there is no formal service of process

The court will not enter a final decree until both parties have certified that financial disclosures were exchanged. Filing the Request for Hearing (MP-701) or the Joint Affidavit for Entry of Decree Without Hearing without this certification results in the court refusing to proceed.

Supporting Documents to Gather

The MP-510 form captures summary figures, but you should be prepared to back them up with documentation if the other party challenges your numbers or if the case goes to trial:

• Federal and state tax returns for the past 2-3 years
• W-2s and 1099s
• Recent pay stubs (at least 3 months)
• Bank statements for all accounts (checking, savings, investment)
• Retirement and pension account statements
• Mortgage statements and property tax bills
• Loan agreements and credit card statements
• Business financial statements and tax returns (if self-employed)
• Insurance declarations pages

How Disclosures Affect Property Division

The information in the MP-510 feeds directly into the Proposed Property Distribution (MP-500). Your income determines child support calculations and potential spousal maintenance. Your expense breakdown demonstrates need (if you are requesting maintenance) or ability to pay (if the other party is requesting it). Asset and debt totals form the pool the court divides under MCA § 40-4-202.

Incomplete or inaccurate disclosures can backfire in two ways:

1. The court delays your case — judges will not sign a decree without confidence that both parties had full financial information
2. Post-decree fraud claims — if your ex-spouse later discovers hidden assets or understated income, they can move to reopen the property division, potentially years after the decree was entered

Ongoing Disclosure in Contested Cases

In contested dissolutions, the initial MP-510 exchange is just the beginning. The court's Scheduling Order will set deadlines for formal discovery, which can include:

• Interrogatories (written questions requiring sworn answers)
• Requests for production of documents
• Depositions (oral testimony under oath)
• Subpoenas to banks, employers, and financial institutions for records

Contested cases with complex finances — business interests, stock options, multiple retirement accounts, real estate portfolios — often require formal valuations by financial experts. The cost of these appraisals ranges from $1,000 to $10,000+ depending on complexity.

The Montana Divorce Filing Process Guide includes a financial disclosure checklist and income-and-expense worksheets that organize your information to match the MP-510 format — so you capture everything the court needs without exposing unnecessary detail.

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