Montana Mechanics Lien Deadlines

How to read the Montana lien timeline

A lien timeline is not one date. It is a sequence of separate steps. For Montana, start by identifying whether the preliminary-notice rule applies to your role and project. The reference above records that requirement as Yes and gives the deadline as 20 days from first furnishing (residential). Do not substitute the date of an invoice, payment application, or internal reminder unless the statute makes that event the trigger.

The filing window is a different step. The source data states 90 days from last furnishing. The enforcement window starts after a lien has been filed. For Montana, that period is 2 years after filing. Keeping these events separate helps prevent a notice deadline from being mistaken for a filing deadline.

A worked Montana timeline

Suppose a subcontractor is reviewing an unpaid project. This example does not invent calendar dates. It shows which project records must be matched to each sourced rule before a calendar date is calculated.

1. Find the notice trigger. Check the daily log and contract record for the event named in 20 days from first furnishing (residential). Confirm whether the stated project or role qualification applies.
2. Find the filing trigger. Use the project record required by 90 days from last furnishing. Record the underlying event and the filing deadline as separate entries.
3. Start enforcement tracking only after filing. Once the lien is filed, preserve the filing receipt and track 2 years after filing. Do not count this period from the first or last furnishing date unless the official law says to do so.

The result is an auditable chain: the project event, the applicable rule, the calculated deadline, and the document that proves when each event occurred. VoiceLogPro can preserve daily work records, but it does not decide whether a statutory exception applies. A licensed Montana construction attorney should confirm the final dates before anyone relies on them.

What to preserve in the project file

Keep the contract, notices, proof of service, daily logs, delivery records, change orders, completion records, the recorded lien, and court or filing receipts together. Label the first furnishing, last furnishing, completion, notice, filing, and enforcement events plainly. If two records conflict, flag the conflict rather than silently choosing the date that leaves more time.

This page cites Mont. Code § 71-3-521 et seq.. Read the official text for definitions, claimant-specific rules, service requirements, exceptions, and any event that can shorten a period. The table is a planning reference, not a substitute for the statute or legal advice.