Die Casting Cost Checklist: 10 Key Questions for Quotes
This die casting cost checklist helps you verify supplier quotes by breaking down material, tooling, labor, and overhead. Use it to spot missing line items, hidden risks, and pricing inconsistencies before you sign a contract.
- A transparent quote separates material, labor, tooling, and overhead into distinct line items.
- Missing tooling amortization or scrap rates often hide the real cost of low volume runs.
- Compare quotes by normalizing for part weight, material grade, and production volume.
- Ask for a pricing breakdown before you negotiate, because you cannot fix what you cannot see.
- Red flags include bundled prices, missing lead time details, and no clear revision or change order process.
Start with the Part and Material Definition
Before you look at a single number, check the part specification. A quote is only comparable if both suppliers are casting the same part in the same material. Verify the alloy grade, such as A380 or A383 for aluminum, or DC545 for magnesium. Confirm wall thickness, tolerances, surface finish requirements, and any secondary operations like deburring, machining, or anodizing.
If the supplier quote lists only a part name and a price, stop there. You do not have enough data to compare. Ask for the drawing number, revision date, and the material certification standard they will use. If the drawing has changed since the last production run, the price must reflect that change.
A common mistake is accepting a quote based on a generic part family. Two parts can look similar but have very different casting costs. One may have deep undercuts that require a more complex die. The other may have thin walls that increase rejection rates. The quote must match the exact geometry you are buying.
Check the Pricing Breakdown
A reliable supplier will provide a pricing breakdown. This is not just a single number. It is a table that shows how the price is built. Look for separate lines for material, labor, tooling, setup, and overhead.
The material line should show the cost per kilogram or pound, multiplied by the net weight of the part. The labor line should reflect the number of shots per hour and the machine hours required. Tooling should be listed separately, even if it is being amortized over a certain number of parts.
Use the table below to check what you expect in a standard quote.
| Line Item | What to Look For | Red Flag |
|---|---|---|
| Material | Alloy grade, cost per unit weight, net weight calculation | No material grade listed or cost per kg missing |
| Labor | Shots per hour, machine type, labor rate | Labor bundled into a single “processing” fee |
| Tooling | Die type, cost, amortization period | Tooling cost hidden in the unit price |
| Setup | Setup time, setup fee, changeover cost | Setup fee missing for multi-part orders |
| Overhead | Factory overhead, profit margin, taxes | No clear profit margin or tax indication |
| Scrap | Expected scrap rate, cost of defective parts | No mention of scrap or rejection handling |
If a supplier gives you a single “all-in” price without a breakdown, you are flying blind. You cannot identify which part of the price is driving the cost. You also cannot negotiate effectively. Ask for the breakdown in writing. If they refuse, assume there are hidden costs.
Review Tooling and Amortization
Tooling is often the largest upfront cost in die casting. The die itself can be expensive, and the die life is finite. A good quote will show the tooling cost and how it is recovered.
If you are running low volumes, tooling cost will have a high impact per part. If you are running high volumes, the tooling cost will spread over many parts. Ask for the die life estimate. A typical die may last for a certain number of shots, but that number depends on the alloy, the die material, and the maintenance schedule.
Check how the supplier amortizes tooling. Do they charge a tooling fee upfront, or do they add a small amount to each unit price? Both methods are common. The key is that the total cost must be clear. If the tooling fee is upfront, you pay it once. If it is amortized, you pay it over time.
A red flag is when the supplier says the tooling cost is “included” in the price but does not specify how long the tooling covers. If the tool breaks after 10,000 shots and you ordered 100,000 parts, who pays for the new die? The quote must define the tooling warranty and replacement policy.
Verify Scrap and Rejection Rates
Scrap is a real cost in die casting. Not every casting comes out perfect. Incomplete fills, hot spots, shrinkage, and surface defects all contribute to scrap. The quote should include an expected scrap rate.
Ask for the historical scrap rate for this part. If the supplier has produced this part before, they should know the rate. If this is a new part, they should estimate it based on similar parts. A low scrap rate is good, but if it is too low, it may be unrealistic.
Check how scrap is priced. Is it included in the unit price, or is it charged separately? If it is included, make sure the rate is realistic. If the scrap rate is high, the unit price should reflect that. If the supplier offers a very low price but does not mention scrap, the real cost may be higher than expected.
Another red flag is when the supplier does not specify what happens with defective parts. Do you have to pay for them? Do they scrap them and charge you? The quote should define the quality standard and the handling of rejects.
Compare Lead Time and Capacity
Cost is not the only factor. Lead time matters. A cheap quote with a six-month lead time may not work for your production schedule. A more expensive quote with a two-week lead time may be better for your business.
Check the lead time for tooling and for production. These are often different. Tooling lead time depends on the die complexity and the die shop. Production lead time depends on the machine availability and the order quantity.
Ask for a capacity plan. How many machines do they have? How many hours per week? If their capacity is tight, your lead time may be longer. If they are running at full capacity, they may not be able to meet your deadline.
A good quote will include the tooling lead time and the production lead time separately. If they give you a single “lead time,” ask for a breakdown. Red flags include vague lead times, no mention of tooling lead time, and no capacity information.
Check for Hidden Costs and Change Orders
Hidden costs are the most common reason quotes do not match the final invoice. Look for terms that may trigger extra charges. Material price fluctuations are one. If the aluminum price goes up, will your price go up? How is that handled?
Setup fees are another. If you order multiple part numbers on the same machine, is there a setup fee for each? If you change the part design, how does that affect the price?
Ask for the change order process. How do you request a change? How long does it take to quote? What is the cost impact? A clear change order process protects both parties. If the process is unclear, assume the supplier will charge extra when you need a change.
Review the contract terms. Payment terms, shipping terms, and liability clauses all affect the total cost. If the supplier charges for shipping, packaging, or certification, make sure it is in the quote.
Use This Checklist to Verify Your Quotes
Use the numbered list below to audit each supplier quote before you sign. Print it out or copy it into a spreadsheet. Walk through each item for every supplier.
- Does the quote match the exact part drawing and revision?
- Is the material grade and alloy standard clearly stated?
- Is there a separate pricing breakdown for material, labor, tooling, setup, and overhead?
- Is the tooling cost listed, and is the amortization method defined?
- Is the die life and warranty specified?
- Is the expected scrap rate included in the pricing?
- Are setup fees and changeover costs defined?
- Are tooling lead time and production lead time listed separately?
- Is the capacity plan and machine availability described?
- Are material price fluctuations and change order terms defined?
- Are shipping, packaging, and certification costs included?
- Is the quality standard and rejection handling policy defined?
- Are payment terms and liability clauses clear?
- Is there a written pricing breakdown that matches the final invoice?
- Have you compared at least two suppliers using the same checklist?
If you cannot answer yes to most of these, the quote is not ready for comparison. Ask the supplier for more information. Do not guess. A missing number is a risk. A clear number is a decision.
Frequently asked questions
Why do two suppliers give different prices for the same part?
The difference usually comes from material cost, labor rate, tooling amortization, or scrap rate. It can also be due to different machine capacity or overhead structures. Ask for a pricing breakdown to see which line item is driving the difference.
How do I know if a tooling fee is fair?
Compare the tooling cost across multiple suppliers. A fair tooling fee should reflect the die complexity, the die material, and the expected die life. If one supplier charges significantly more, ask for their die design and material specification.
What is the best way to handle material price changes?
Define the material price index and the adjustment mechanism in the contract. Specify how often the price will be reviewed and how much notice you will get before a change. A fixed price for a short period is common for low volume orders.
Should I pay tooling upfront or amortize it?
It depends on your cash flow and the expected volume. Upfront payment reduces the per-unit cost and gives you ownership of the die. Amortization reduces the upfront cost but keeps the per-unit price higher. Compare the total cost over the expected production period.
How many quotes should I request?
Request at least three quotes from different suppliers. This gives you a baseline for comparison and helps you identify market rates. If you only have one quote, you cannot negotiate effectively.
