# Handling Resin Price Increases in Injection Molding Quotes > Source: https://netray.co/resources/resin-price-increase-pass-through-injection-molding-quotes > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Knowledge Base ## Short answer How injection molders handle resin price swings in quotes: index clauses, quote validity, material surcharges, pass-through rules and ERP price tracking. ## Category ai-automation ## Content **Intro:** Injection molders handle resin price swings by separating material from conversion cost in the quote, tying material price to a published index or the supplier's price letter, keeping quote validity short (often 30 days), and adding a pass-through clause that adjusts piece price when resin moves beyond a threshold such as 5 percent. Without that language, a 15 cent per pound increase on a 500,000 pound annual program quietly erases most of the margin. The fix is contractual first, systems second. **Sections:** #### Why Resin Moves Hurt Molders So Much **Body:** Resin is often 30 to 60 percent of a molded part's cost on commodity programs like polypropylene or polyethylene, and even higher on engineered resins and high-fill parts. Prices follow feedstock, plant outages and force majeure events, and suppliers issue increase letters with 30 days notice or less. The molder commits to a piece price for a year, buys resin at the market price of each month, and holds the gap. A quote built on last quarter's price list can be underwater the day the PO arrives. **Bullets:** - Commodity resins can move several cents per pound in a month - Engineered resins (nylon, PC, PBT, PEEK) swing on feedstock and supply shortages - Masterbatch, color concentrates and additives often have separate increases #### Contract Terms That Protect Margin **Body:** The strongest protection is a resin pass-through clause that sets a base resin price in the quote and adjusts piece price by part weight times the price change when the market moves outside a band. Anchor the change to something verifiable: the supplier's price announcement, a published index such as those reported in industry resin price surveys, or your invoiced cost. Specify the adjustment frequency (monthly or quarterly), the threshold, who gets the benefit of decreases, and how regrind and scrap are treated. Many customers accept this readily for commodity resins and resist it for engineered grades they buy directly. **Bullets:** - Base resin price and date stated on every quote line - Adjustment trigger such as 3 to 5 percent movement from base - Piece price change equals shot weight per part times price delta, adjusted for scrap allowance - Quote validity window, commonly 30 days, with resin pricing re-confirmed on PO #### Customer-Supplied and Resale Resin Models **Body:** Some programs avoid the problem. In a customer-supplied or consigned resin model, the customer buys the resin and ships it to you, and you quote conversion cost only, with a yield allowance for scrap. In a resale model, resin is a separate invoice line at cost plus handling fee. Both reduce price exposure but change inventory, working capital and traceability obligations. Customer-supplied resin must still be received, lot tracked, dried and reconciled against usage, which is where plants without good ERP discipline lose control of shrink. #### Track Resin Price in the ERP, Not Just in Purchasing **Body:** The practical failure point is that the resin price in the ERP item master, the price in the open quotes and the price on the latest PO diverge. Keep an effective-dated resin price per material in the system, tie it to each quote and job, and run a monthly report of open programs showing quoted resin price, current cost and the margin impact. That report tells you which customers to send a price adjustment to first. In DELMIAworks, Plex, Epicor Kinetic or SyteLine, this is an item cost and BOM roll-up exercise plus a query across active jobs, which an assistant can run on demand. #### Where AI Helps and Where It Does Not **Body:** AI is good at reading a supplier increase letter, finding every active part number using that resin, calculating the annualized impact by customer, and drafting the adjustment notice for sales to review. Netray builds this as a private agent over your ERP and email, with approval before any price change is posted. AI cannot make your customer accept the increase, and it should not change prices unattended. The negotiation, and the decision about which customer to push on, remain with sales and the GM. #### When a Formal Clause Is Not Worth the Fight **Body:** If your annual resin spend is small, your jobs turn in weeks, or your quotes are valid for 15 days and orders are short run, a clause may add more friction than it removes. Shorten validity and re-quote on every PO instead. Reserve formal indexing for long programs and blanket orders where the price is fixed for six to twelve months. **Cta:** If a resin increase letter takes your team days to translate into customer price changes, we can show how an agent over your ERP calculates the impact per program in minutes. **Faq:** #### How do plastic injection molders pass through resin price increases? **Answer:** They add a resin adjustment clause to quotes and blanket orders: a base resin price, a threshold for change, and a formula that moves piece price by the part's resin weight times the price delta. Some use supplier letters or a published index as proof of the change. #### How long should an injection molding quote be valid? **Answer:** Commonly 30 days, shorter during volatile resin markets. Piece prices tied to a specific resin cost should state the base price and date, and many molders re-confirm resin pricing at the time the purchase order is placed. #### Should I charge for regrind in the quote? **Answer:** Treat regrind consistently. If you allow regrind percentage by contract, quote resin cost on the blended rate and track it. If the customer forbids regrind, price virgin resin and scrap-and-startup loss in full, because you lose the recovery value. ## Related Slugs - how-to-quote-injection-molding-jobs-faster - how-to-estimate-injection-mold-tooling-cost - best-erp-for-injection-molders - injection-molding-production-scheduling-mold-machine-matching ## Search terms resin price increase injection molding, resin surcharge pass through, material price adjustment clause molding, plastic resin price escalator, injection molding quote validity, resin cost in piece price --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json