A formal document filed by a subcontractor to preserve lien rights on a project before work begins or early in the job. It notifies the property owner and general contractor that you have a financial stake in the project. Without it, you may lose the right to file a lien if payment is withheld.
Preliminary Notice
Related Terms
Fixed-Price Contract
Cash FlowA contract where the subcontractor agrees to complete a defined scope of work for a set price regardless of actual labour, equipment, or material costs incurred — meaning cost overruns come directly out of your margin. Unlike time-and-material agreements, these contracts reward efficiency but expose field service companies to significant financial risk if scope creep or unforeseen site conditions arise.
Progress Billing
Cash FlowInvoicing for work completed to date on a longer project, rather than waiting until project completion. Helps subcontractors maintain cash flow on extended jobs.
Settling System
Cash FlowThe process a prime contractor or operator uses to review, approve, and finalise invoices before releasing payment to subcontractors. Understanding the settling system helps subs forecast cash flow and avoid payment delays. Timelines vary widely between clients, so confirm the cycle before mobilising.
Tranche
Cash FlowA portion of a larger contract or payment released in stages upon meeting set milestones or schedules. Subcontractors are often paid in tranches tied to project phases or work completions. Understanding tranche structures helps you plan cash flow and resource deployment accordingly.
Backlog
Cash FlowThe total value of contracted work that has been awarded but not yet completed. A healthy backlog signals steady upcoming revenue and helps subcontractors plan crew deployment and equipment needs. Thin backlogs often signal the need to ramp up bidding activity.
Net Pay
Cash FlowThe amount a subcontractor or field worker actually receives after all deductions — such as taxes, union dues, equipment charges, or mobilisation costs — have been subtracted from gross earnings. For subcontracting companies, tracking net pay against invoiced amounts is critical to maintaining healthy margins on field projects.
Latest Cash Flow News
Hudson Tunnel Boring Starts on $16B Project Amid Funding Fights
Tunnel boring machines are set to start cutting through 5,100 feet of Palisades rock on the $16 billion Hudson Tunnel project. Subcontractors should weigh payment and federal funding exposure before signing on.
7 days agoCash FlowClaremore Data Center Deal Sends $172M to Oklahoma Schools, County
A Beale Infrastructure data center project near Claremore, Oklahoma will pay $172 million in PILOT funds to local schools and county agencies over 25 years, with Sequoyah Public Schools receiving the largest share at $100 million.
23 days agoCash FlowUtilities Tighten Large-Load Tariffs With Upfront Fees, Longer Contracts
A new LBNL and Brattle Group analysis finds utilities increasingly requiring upfront payments, exit fees, and ramp schedules for large-load customers like data centers, a shift that will slow project timelines for grid-tie and on-site generation subcontractors.
28 days agoCash FlowTrump Administration Appeals Ruling Blocking Hudson Tunnel Funding Freeze
The Justice Department has appealed a federal court ruling that barred DOT from withholding funds on the $16B Hudson Tunnel Project, though reimbursements and construction continue for now, ENR reports.
1 month agoRelated Guides
What Happens to Subcontractor Billing When a Project Stalls, Goes Over Budget, or Never Gets Commissioned
You did the work. The project was cancelled, shelved, or never activated. Here is what subcontractors need to know about billing rights, legal remedies, and how to get paid when no one wants to discuss the invoice.
Cash Flow GuidePost-Completion Warranty and Punch Work: Protecting Your Margins After the Job Ends
Warranty walks, punch lists, and post-completion callbacks eat into subcontractor margins. Learn how MSA warranty clauses work, when you can push back on mobilization costs, and how to document your way out of disputes.
Cash Flow GuideMechanic's Lien Rights for Subcontractors: What to Do When You're Not Getting Paid
A practical guide to mechanic's lien and materialman's lien rights for oilfield and construction subcontractors in Texas, Oklahoma, and Alberta — deadlines, filing steps, and leverage tactics.
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