Stored materials best practices vary by state. Each state has its own retainage caps, prompt payment deadlines, and mechanics lien rules that directly affect how general contractors handle stored materials billing. A 2025 National Association of Surety Bond Producers survey found that 29% of multi-state GCs have been penalized for applying one state's stored materials rules to a project in another state.

This guide maps the key stored materials requirements across major construction states so you can adapt your processes to local law.

Why State Rules Matter for Stored Materials

State law governs three aspects of stored materials that GCs must track:

Retainage caps. States set maximum retainage percentages for public projects and sometimes private ones. If your retainage on stored materials exceeds the state cap, you are in violation.

Prompt payment deadlines. States require GCs to pay approved amounts within specific timeframes. If you delay stored materials payments beyond the deadline, you may owe interest penalties.

Mechanics lien rights. Suppliers and subcontractors can file liens against the project if they are not paid. State lien laws define the filing deadlines, notice requirements, and priority rules that affect stored materials claims.

State-by-State Stored Materials Requirements

State	Retainage Cap (Public)	Prompt Payment Deadline	Lien Filing Deadline	Key Stored Materials Rule
California	5%	30 days	90 days from completion	Sub must provide conditional waiver before payment
Texas	5%	35 days	15th day of 3rd month after unpaid	GC must pay within 7 days of receiving owner payment
Florida	5% after 50% complete	25 days (local)	90 days from last work	Off-site materials require notice to owner
New York	5%	30 days	8 months from last work	Stored materials must be clearly identified for project
Illinois	10%	30 days	4 years from last work	Retainage release within 60 days of completion
Ohio	10%	30 days	60 days from last work	Stored materials billing requires itemized list
Georgia	10% (no statutory cap private)	30 days	90 days from last work	Preliminary notice required within 30 days
Pennsylvania	10%	45 days	6 months from completion	Off-site stored materials require title transfer
Washington	5%	30 days	90 days from last work	Retainage bond option available
Colorado	5% after 50% complete	30 days	4 months from completion	Trust fund requirements apply to stored materials

California: Conditional Waivers and Stored Materials

California's mechanics lien framework directly affects stored materials billing. Before the GC pays for stored materials, the sub should provide a conditional waiver and release on progress payment (California Civil Code Section 8132). After payment clears, the sub provides an unconditional waiver.

For off-site stored materials, California requires the sub to prove that materials are specifically earmarked for the project. Generic warehouse inventory does not qualify. The sub must tag materials with the project name and maintain separate storage from other projects.

California's 5% retainage cap on public projects applies equally to stored materials and installed work. On private projects, the parties can negotiate any retainage rate, but 10% is standard.

Texas: Seven-Day Flow-Down and Stored Materials

Texas Property Code Chapter 28 requires GCs to pay subcontractors within 7 days of receiving payment from the owner. This flow-down applies to stored materials claims included in approved pay applications.

If the owner pays the GC for stored materials on day one, the GC must pay the sub by day seven. Failure to comply triggers 1.5% monthly interest penalties.

For stored materials verification, Texas courts have held that the GC must exercise reasonable diligence in verifying claims. A GC who approves stored materials without any verification may be liable for resulting losses.

Florida: The 50% Threshold Rule

Florida's retainage rules create a unique stored materials dynamic. Retainage starts at 10% but drops to 5% once the project reaches 50% completion. This threshold applies to the total of work completed plus stored materials.

GCs must track when stored materials push the project past the 50% threshold. Once that threshold is crossed, retainage on all subsequent billings (including stored materials) must drop to 5%.

Florida also requires subs to send a Notice to Owner within 45 days of first furnishing materials. This applies to stored materials delivered to off-site locations. Without the notice, the sub's lien rights may be limited.

New York: Identification and Labor Law Impact

New York requires stored materials to be clearly identified for the specific project. The Lien Law (Article 3-A) creates trust fund requirements that affect how GCs handle stored materials payments.

Under New York law, progress payments create a trust fund. The GC holds payments in trust for the benefit of subcontractors and suppliers. Diverting stored materials payments to other purposes violates the trust fund statute and can result in personal liability for the GC's officers.

For stored materials, this means GCs must track the flow of funds from owner payment through subcontractor disbursement. Using stored materials payments for anything other than paying the sub (or their suppliers) violates the law.

Multi-State Compliance Strategy

GCs operating across state lines need a flexible stored materials program that adapts to local rules. Here is how to build one.

Create a state compliance matrix. Build a reference document listing retainage caps, payment deadlines, lien rules, and unique requirements for every state where you work. Update it annually.

Use the strictest standard as your baseline. If you work in states with 5% and 10% retainage caps, default to 5% for all projects. This keeps you compliant everywhere and simplifies your process.

Automate state-specific rules. Pay application software can apply different retainage rates, payment deadlines, and documentation requirements based on project location. Configure these rules during project setup.

Train your teams on local rules. PMs and project accountants working on out-of-state projects must understand the local requirements. A California PM managing a Texas project needs to know the 7-day flow-down rule.

Common Multi-State Mistakes

Applying home-state rules to out-of-state projects. A Georgia GC who retains 10% on a California public project is violating California law. Always check local rules.

Missing lien notice deadlines. Each state has different notice requirements and filing deadlines. Missing a deadline can eliminate your ability to recover stored materials costs from a defaulted sub.

Ignoring trust fund requirements. States like New York and Colorado impose trust fund obligations on construction payments. Using stored materials payments for non-project purposes can create personal liability.

Overlooking retainage reduction thresholds. States like Florida and Colorado require retainage reduction at specific completion milestones. Failing to reduce retainage on stored materials after hitting the threshold violates state law.

FAQs

Do all states allow billing for off-site stored materials? Most states do not prohibit off-site stored materials billing, but many public contracts restrict or limit it. Some state procurement codes require prior approval of off-site storage locations and additional documentation beyond what is needed for on-site materials. Check the project contract and local law before accepting off-site claims.

Which states have the strictest stored materials requirements? California, New York, and Texas have the most detailed requirements. California requires conditional waivers, New York imposes trust fund obligations, and Texas enforces a 7-day payment flow-down. GCs working in these states need robust documentation and payment tracking processes.

How do federal projects handle stored materials differently from state projects? Federal projects follow the Federal Acquisition Regulation (FAR) and the Miller Act. The FAR requires title transfer before payment for stored materials. The Miller Act provides payment bond protection in place of mechanics lien rights. Federal projects do not follow state retainage caps or prompt payment laws.

Can a GC be personally liable for mishandling stored materials payments? Yes, in states with trust fund statutes like New York and Colorado. If a GC diverts stored materials payments to non-project purposes, the GC's officers can face personal liability. This includes using sub payments to cover corporate overhead or fund other projects.

How do retainage rules on stored materials differ for public versus private projects? Public project retainage caps are set by state statute and cannot be exceeded. Private project retainage is negotiable between the parties. Some states (like Georgia) have no statutory retainage cap for private work. Others (like California) cap public retainage at 5% but allow higher rates on private contracts.

What happens if a GC misses a state prompt payment deadline on stored materials? Most states impose interest penalties on late payments. The penalty rate varies by state, ranging from the prime rate to 2% per month. Some states also allow the sub to suspend work or recover attorney fees for prompt payment violations. The penalties apply regardless of whether the delay was intentional.

See How SubcontractorAudit Handles Multi-State Compliance

SubcontractorAudit applies state-specific retainage rules, tracks payment deadlines, and automates documentation requirements for every project location. Request a demo and see multi-state stored materials compliance in action.