For a private-label car accessory, the mould or tool is usually the largest sum you pay before you have sold anything. Buyers typically receive a single tooling figure per factory, with no breakdown, and two figures for what looks like the same part can be far apart for good reasons — or for reasons that will cost you later.
This guide explains what actually drives tooling cost for vehicle-specific accessories, how to ask for quotations that can be compared, and what to agree about modifications, storage, repair and moving a tool. It does not give prices: they depend on the factory, the part and the market at the time. Who owns the tool, and how to recover it, is covered separately in our article on mould and tooling ownership clauses.
💬 Comparing tooling quotations for a visor, mat or liner range? Send them to us and we will show you what each one includes and leaves out. Talk to us about car accessory OEM.
First question: does a usable tool already exist?
Before you price a new tool, find out whether the factory already holds one for your vehicle configuration, whether an existing tool can be modified, and who owns it.
Car accessories are vehicle-specific, so many factories hold tools for the configurations they have sold before. Using one changes the whole project.
| Route | Upfront tooling cost | Main risk |
|---|---|---|
| Existing tool, factory-owned | None or small | The same shape is sold to other buyers; fit may be for another market version |
| Existing tool, modified (new insert, logo plate, trimmed edge) | Partial | Changes may not be reversible; confirm the owner agrees |
| New tool | Full | Fit errors in the specification are built into the steel |
Ask whose tool it is. A tool paid for by another customer may not be available to you at all, and a factory that offers it anyway is telling you something about how it would treat your tool. Before committing to a new tool, check that your vehicle configuration is pinned down; our guide to car accessory fitment data sets out what to define.
The process decides the kind of tool
Different accessories are made by different processes, and the process decides what kind of tool is needed and roughly how expensive it is to make and change.
| Product family | Common process | Kind of tool |
|---|---|---|
| Door visors, bonnet guards | Forming acrylic or polycarbonate sheet; some are injection moulded | Forming mould, trimming fixtures; or an injection mould |
| Moulded floor mats, cargo liners | Compression or injection moulding of rubber or TPE; thermoforming of sheet | Compression mould, injection mould or forming mould |
| Carpet floor mats | Cutting carpet to a pattern, binding edges | Pattern and cutting die |
| Mud flaps | Injection or compression moulding | Injection or compression mould |
| Side steps, roof rails | Aluminium extrusion, bending, stamping of brackets | Extrusion die, bending and stamping tools |
The same product can be made more than one way, and the cheaper tool is not always the cheaper project. A forming mould usually costs less than an injection mould for the same shape, but the parts then need trimming and the process may suit lower volumes. Ask each factory which process it proposes, and compare quotations only between factories proposing the same one — or compare the whole project, tool plus unit price, over your expected volume.
Background on the processes themselves is in our guides to injection moulding outsourcing and rubber moulded parts.
The drivers of tooling cost
Tooling cost is set mainly by the size of the part, the material being moulded, the number of cavities, the tool material and the life the tool is built for, with part complexity on top.
| Driver | What raises cost | What to ask |
|---|---|---|
| Part size | Larger parts need larger tool blocks and larger presses | Which press size the tool is designed for |
| Material moulded | Rubber and some reinforced plastics are harder on tools or need heated compression | Which grade of material the tool is designed around |
| Cavity count | More cavities per tool, or a left-right pair in one tool | How many parts per cycle, and whether left and right share a tool |
| Tool material | Hardened tool steel costs more than pre-hardened steel or aluminium | Which material is used for the cavity and core |
| Designed life | A tool built for long runs needs harder steel and better cooling | The life the factory will state in writing |
| Complexity | Undercuts need slides or lifters; textures and logo inserts add work | Which features need moving parts or extra machining |
| Variants | Mirror-image parts, drive-side versions and facelift changes | Separate tools, or interchangeable inserts in one tool |
Cavities and the left-right question
Many accessories come in pairs: front left and front right visors, left and right mud flaps, driver and passenger mats. A tool that makes both sides in one cycle costs more to build but halves the number of tools to store and keeps the pair matched. Two separate tools cost less each but must both be maintained. Decide this in the quotation, not after the first trial.
Match tool material and life to your volume
A tool built for very long runs is wasted on a product you will sell for one model generation. A tool built too lightly wears out before the generation ends. Tell every factory your expected volume over the life of the vehicle generation, and ask them to state the life their proposed tool is designed for. Without that, a cheaper quotation may simply be a shorter-lived tool.
Reading a tooling quotation
A tooling quotation can only be compared with another when both state the tool material, cavities, designed life, trial runs, sample quantities and what happens to modifications.
| Line to look for | Why it matters |
|---|---|
| Process and tool type | Different processes are not comparable on tool price alone |
| Tool material (cavity and core) | Sets durability and repairability |
| Number of cavities | Sets output per cycle and the unit price |
| Designed life | Tells you when replacement may be due |
| Number of trial runs included | Each extra trial costs time and sometimes money |
| Sample quantity per trial | You need enough for a test fit and for testing |
| Texture, logo and surface finish | Often quoted separately |
| Modifications after the first trial | Who pays when the change is a fit error versus a design change |
| Tool drawings and 3D data | Whether you receive them, and in what format |
| Storage and maintenance | Whether included, and for how long |
When a line is missing, ask for it rather than assuming. Our article on comparing Asian suppliers on landed cost explains how to set tooling against unit price and freight so the whole project is compared, not just the first invoice.
💬 We ask factories in Taiwan, Thailand and Malaysia to quote tooling on the same terms, so the figures can be compared line by line. See our car accessory OEM service.
Fit-driven changes after the first trial
Agree before the tool is cut who pays for changes after the first trial, separating factory errors, errors in your specification and changes you decide to make.
Vehicle-specific tools are rarely right first time. The first samples are test-fitted, and the tool is adjusted. Who pays depends on why the change is needed:
- Factory error: the part does not match the agreed drawing or data. The factory should correct it.
- Specification error: the drawing matched your data, but your data described the wrong configuration. This is usually yours to pay.
- Design change: you decide to change a feature. Yours to pay, and it may reset the trial schedule.
Adding material to a tool is harder than removing it, so a change that makes a part larger can be more expensive than one that makes it smaller. This is one more reason to fix the vehicle configuration before the tool is designed.
Storage, maintenance and repair
The tool stays at the factory, so agree in writing how it is identified, stored, maintained and repaired, and what happens if it sits unused for a long time.
Between orders, a tool sits on a rack in the factory. Steel tools need cleaning and rust protection; moving parts wear; texture surfaces can be damaged. A tool that has been neglected can produce defective parts on the next order, and the repair cost then becomes a dispute.
Points to agree:
- Identification: a tool number on the tool, matching your records and the factory’s asset list
- Routine maintenance: what the factory does as part of the unit price
- Wear and repair: which repairs the factory covers and which you pay for, and how wear is judged
- Dormant tools: how long the factory keeps a tool with no orders, and how much notice it must give before scrapping or returning it
- Evidence: photographs of the tool and its tag on request, so you can check it still exists
The ownership side of these points — title, release, and recovery if the relationship ends — is set out in our tooling ownership article, and is not repeated here.
Moving a tool to another factory or country
A tool moved across a border is imported goods, and the receiving factory needs compatible equipment and a new trial before it can produce.
Moulds for rubber or plastics fall under HS heading 84.80, with injection and compression types at 8480.71 and other types at 8480.79. The six-digit code is shared internationally, but the import duty and procedure are set by the receiving country. In Japan’s tariff schedule (8 August 2026 edition), for example, both subheadings are duty-free; other countries apply their own rates and may treat a tool temporarily imported for a processing contract differently.
Practical points before you move a tool:
- confirm the receiving factory’s presses or forming machines can take it
- send the tool drawings, process settings and last approved samples with it
- budget for a trial run and a fresh test fit at the new factory
- arrange the export and import paperwork with the tool number on the invoice and packing list
Commission new tooling only for proven products
Test demand with existing tools or stock items first, and commission new tooling for the configurations that have shown they sell.
A staged approach — stock items, then your logo and packaging, then new tooling — keeps tooling spend where demand already exists. Our overview of car accessory OEM in Taiwan, Thailand and Malaysia describes the stages.
Whatever the route, new tools should be for your own designs. We do not arrange tools that copy a vehicle maker’s original-equipment design or carry its logo; design rights and trademarks apply.
Sunsho Trade is a trading company and does not own factories. For each project we find and manage the factory in Taiwan, Thailand, Malaysia or elsewhere that fits the product, including the tooling quotation, trials and test fits.
💬 Ready to price tooling for a new configuration? Send us the product, the vehicle configuration and your expected volume, and we will obtain comparable quotations. Send us your project.
For item-by-item detail, see our guides to mud flaps, bonnet guards, cargo liners, window louvres and spoilers, side steps and roof racks.
Frequently asked questions
1. Why do two factories quote very different tooling costs for the same part?
Usually because they are proposing different processes, tool materials, cavity counts or designed lives. Ask each to state those lines; the difference often explains itself.
2. Is an aluminium tool a false economy?
Not necessarily. An aluminium tool can suit a low-volume product or a trial run. It is a problem only when the volume you expect is beyond what the factory will state the tool can produce.
3. Can one tool make both right-hand-drive and left-hand-drive versions?
Sometimes, using interchangeable inserts, where the difference is small. Where the shapes differ substantially, separate tools are needed. Ask the factory to propose both options in the quotation.
4. Who pays if the tool wears out during the contract?
That should be in the contract. Agree the designed life, how wear is judged, and who pays for refurbishment or replacement before the tool is made.
5. Should I pay for tooling before samples are approved?
Factories commonly ask for part of the tooling payment before work starts. Tie the remaining payments to milestones such as approved samples, and see our ownership article for how payment links to title.
Sources
Checked on 24 October 2026.
- Japan Customs, Customs Tariff Schedule of Japan (8 August 2026 edition), Chapter 84, heading 84.80: https://www.customs.go.jp/english/tariff/2026_08_08/data/e_84.htm