Montana Partial Payment on a Judgment: How to Track, Apply, and Keep Collecting

A Montana judgment debtor sends you $500 on a $4,000 judgment. Progress — but now you're staring at questions the court never answered. Does the payment reduce what you can garnish? Does interest keep running on the remaining balance? Can you still serve a writ of execution for the rest? The short answer to all three is yes, but the details matter for keeping your records straight and your enforcement rights intact.

How Partial Payments Get Applied

Montana follows a standard allocation order for partial payments on judgments. Each payment applies in this sequence:

1. Accrued enforcement costs first. Sheriff execution fees, transcript fees, and other recoverable costs you've paid out of pocket come off the top.
2. Accrued post-judgment interest second. Interest calculated under MCA § 25-9-205 at the Prime + 3% annual rate (simple, non-compounded) from the date of judgment entry.
3. Principal balance last. Whatever remains after costs and interest reduces the original judgment amount.

This allocation order matters because it affects how quickly the principal shrinks — and the principal is the base on which future interest accrues. Once a payment reduces the principal, subsequent daily interest calculations use the lower figure.

A Worked Example

Say you hold a $5,000 judgment entered on January 15, 2026, at a statutory interest rate of 10.5% (Prime at 7.5% + 3%). You paid $70 in sheriff execution fees for a wage garnishment. The debtor's employer sends you $600 on August 15, 2026 — 212 days after judgment.

Interest accrued on $5,000 over 212 days at 10.5%: $5,000 × 0.105 × (212/365) = $304.93.

Allocation of the $600 payment:

• $70.00 → sheriff execution fee (now recovered)
• $304.93 → accrued interest
• $225.07 → principal reduction

New principal balance: $5,000 − $225.07 = $4,774.93

Going forward, daily interest accrues on $4,774.93, not the original $5,000. At 10.5% annual, that's about $1.37 per day instead of $1.44.

Your Enforcement Rights Don't Pause

Accepting a partial payment does not waive your right to enforce the remaining balance. You can still:

• Continue an active wage garnishment. Under MCA § 25-13-402(6)(a), a levy on earnings runs continuously for 120 days from the date of service, or until the judgment is fully satisfied. The employer keeps withholding each pay period until the full balance (principal + interest + costs) is paid or the 120-day window closes.
• Serve a new writ for the remainder. If the current writ expires before the judgment is satisfied, request a fresh Writ of Execution from the Justice Court clerk for the updated balance.
• Levy a bank account. A partial wage payment by itself doesn't prevent you from simultaneously levying a bank account if the debtor has non-exempt funds elsewhere.
• Maintain a real property lien. A partial payment doesn't release a lien you've docketed through District Court under MCA § 25-9-301. The lien stays until the judgment is fully satisfied and you file a satisfaction of judgment.

Voluntary Payments Outside of Court Orders

When a debtor pays you directly — not through a sheriff's levy — keep a written record of every payment: the date received, the amount, and how you applied it (costs, interest, then principal). Issue a receipt or written acknowledgment to the debtor.

If the debtor proposes a voluntary payment plan, you can agree to it informally or ask the Justice Court to enter a formal installment order. A court-approved installment order stays involuntary execution (garnishment, levies) as long as the debtor sticks to the schedule. If a payment is missed, check the terms of the order before resuming enforcement.

A critical caution: never agree in writing to accept a partial amount as "full satisfaction" of the judgment unless you genuinely intend to forgive the rest. A written statement that a partial payment is accepted as full satisfaction can create a dispute about whether the remaining balance was released. If you intend to keep collecting, make sure any receipt states "partial payment — balance of $X,XXX.XX remaining."

What Happens When the Debtor Pays in Irregular Amounts

Some debtors pay sporadically — $200 one month, nothing for three months, then $350. This is frustrating but common, and it doesn't change your enforcement math. Each time a payment arrives:

1. Calculate interest accrued since the last payment (or since judgment entry, if this is the first)
2. Apply the payment in order: costs → interest → principal
3. Record the new principal balance
4. Interest continues accruing on the reduced principal from that date forward

Keep a running ledger. If you later need to request a new Writ of Execution, the clerk will want the current payoff balance — principal plus accrued interest plus any unrecovered costs.

When to File a Satisfaction of Judgment

Only when the debtor has paid the full judgment balance — principal, all accrued interest, and all recoverable costs — should you file a Satisfaction of Judgment with the Justice Court. This is a legal obligation, not optional courtesy. Filing the satisfaction closes the case on the court docket, terminates any active garnishment orders, and releases any recorded liens.

If you docketed a transcript of judgment in District Court, file an acknowledgment of satisfaction with that clerk so the satisfaction is entered in the judgment docket under MCA § 25-9-311.

The Collecting a Small Claims Judgment in Montana guide includes a payment tracking ledger and the interest calculation worksheet you need to keep an accurate running balance through partial payments — from the first sheriff remittance to the final satisfaction filing.

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