2 deadlines NoticeGuard models for Missouri: what each one counts from, the statute it was read from, and the statute text.
Information, not legal advice. This app reports what the statute says and cites the section it read. It is not legal advice, it does not file anything for you, and it does not tell you what to do.
Verify with the statute or an attorney. Statutes change, and courts reinterpret them. Every deadline in this app comes from a statute read on the date shown next to its citation - that snapshot can go out of date. Missing a mechanics lien deadline can extinguish your claim permanently, so confirm any deadline you are relying on with an attorney licensed in that state before you act on it.
Data verified: statute text retrieved 2026-09-21 (each citation below carries its own date). Rule data from the NoticeGuard app, source commit 22f9300.
Filed with the clerk of the circuit court, counted from this claimant's own indebtedness accruing - confirmed by case law to mean this claimant's own last furnishing of labor or material, not overall project completion.
What it counts from. 180 days after last furnishing (last day on site).
Applies to. Original contractor, Subcontractor, Supplier, Preconstruction service.
RSMo § 429.080 (sole operative sentence) Official source · statute text retrieved 2026-09-21
“It shall be the duty of every original contractor, every journeyman and day laborer... and every other person seeking to obtain the benefit of the provisions of sections 429.010 to 429.340, within six months after the indebtedness shall have accrued... to file with the clerk of the circuit court of the proper county a just and true account of the demand due him or them after all just credits have been given, which is to be a lien upon such building or other improvements...”
If the date is missed (the statute's own terms). The statute states this is a duty owed within the period "to file... a just and true account" that "is to be a lien" - a lien statement not timely filed does not perfect a lien.
Also stated next to this deadline.
Approximated as 180 calendar days (6 months), the same approximation style used throughout this app.
Applies identically to the original contractor, subcontractor, and supplier - confirmed from the statute's own text ("every original contractor... and every other person"); the difference by role is in the notice preconditions (§§ 429.012, 429.100), not this filing deadline.
Rented equipment/machinery claims get a different, shorter 60-day deadline from last removal of the equipment - not modeled; see `limitations`.
Commence an action to enforce the lien
Counted from the date the lien statement was filed. The lien itself expires if suit is not timely commenced.
What it counts from. 180 days after notice of construction lien recorded.
Applies to. Original contractor, Subcontractor, Supplier, Preconstruction service.
RSMo § 429.170 (sole operative sentence) Official source · statute text retrieved 2026-09-21
“All actions under sections 429.010 to 429.340 shall be commenced within six months after filing the lien, and prosecuted without unnecessary delay to final judgment; and no lien shall continue to exist by virtue of the provisions of said sections, for more than six months after the lien shall be filed, unless within that time an action shall be instituted thereon, as herein prescribed.”
If the date is missed (the statute's own terms). The statute states plainly "no lien shall continue to exist" past this date without a timely-instituted action - a substantive extinguishment, not merely a procedural bar.
Also stated next to this deadline.
Approximated as 180 calendar days (6 months), the same approximation style used throughout this app.
A clean, statute-text-explicit anchor (the lien's own filing date) - unlike the filing deadline above, this one needs no case-law gloss to identify its anchor.
Applies identically across every role.
Weekend and holiday rollover
NoticeGuard does not model a weekend or holiday extension for Missouri. The dates above are the plain count from the date you enter. Check whether a Saturday, Sunday or holiday changes your date.
What this rule set does not cover
The original contractor's pre-payment notice (§ 429.012) is NOT modeled - it has no numeric day count at all. It is a condition precedent owed only by the original contractor, due before receiving any payment, satisfied at any of four alternative timing pegs (contract execution, material delivery, work commencement, or with the first invoice) - a boolean precondition, not a deadline this app's `Computation` (anchor + offset) can express.
The non-original-contractor's ten-day pre-filing notice (§ 429.100) is NOT modeled. It counts backward from the claimant's own chosen lien-filing date (notice must precede filing by at least 10 days) - the same category of backward-counted gap as Colorado's and Pennsylvania's own skipped pre-filing notices.
The owner-consent precondition for non-original-contractor liens on owner-occupied residential repair/remodel/addition work of 4 units or less (§ 429.013) is not modeled - a narrow, project-type-and-scope-gated requirement with no day count of its own (a signed consent attached to the lien filing, not a deadline).
The shortened 60-day filing deadline for rented equipment/machinery claims (§ 429.080) is not modeled - this app has no fact field distinguishing a rental-equipment claim from ordinary labor/materials.
The "last furnishing" anchor for the filing deadline is a case-law gloss on the statute's own words ("indebtedness shall have accrued"), not literal statutory text - long-settled and consistently applied (case annotations going back to 1953), but worth naming as doctrine layered on the bare text rather than the text itself spelling out "last furnishing."
Weekend/holiday rollover is NOT modeled - deliberately, not by oversight. § 1.040 (general) only extends a deadline landing on a SUNDAY, saying nothing about Saturdays or holidays. A fuller Saturday/Sunday/legal-holiday rollover exists in § 506.060 (the civil-procedure code's own time-computation rule), and a 1956 case (Hermann v. Dixon) applied it to a mechanic's-lien filing deadline specifically - but that case predates the current 6-month text of both §§ 429.080 and 429.170 and the current text of § 506.060 and the § 9.010 holiday list, so the exact modern citation chain is reasoned, not freshly litigated. The same honest gap as most other states in this app, with an unusually well-documented historical case behind it.
Only §§ 429.012, 429.013, 429.080, 429.100, 429.170, 1.040, 506.060, and 9.010 have been read. The rest of Chapter 429 is not incorporated.
This app generates the mechanic's lien statement from § 429.080's required content (no prescribed exact form - confirmed the section is a single paragraph with no continuation elsewhere in the chapter). Courts have separately required this "account" to be itemized rather than a lump sum - a judicial gloss, not statutory text, noted in the generated document but not verified by this app.
NoticeGuard is an app that turns a job's dates into a countdown for each statutory step, shows the statute text each date was read from, exports a calendar file (.ics) and sends reminders 14, 7 and 1 day before each deadline. It tracks and reminds; it does not file anything for you.