Cost Engineering

The Automotive Industry’s Costing Problem and a Better Way Forward in 2025


Automotive manufacturers operate in a highly competitive environment shaped by technological shifts, regulatory demands, and global supply chain pressures. As electric mobility, digital vehicle architectures, and sustainability targets move to the forefront, the ability to understand and manage product costs quickly and accurately has become crucial. 

This challenge has taken on new urgency. According to Bain & Company, OEM profit margins dropped to 5.4% in Q1 2025 - a 40% decline from their 2021 peak and their lowest level since the pandemic. For the third quarter in a row, supplier margins outperformed those of OEMs, reversing nearly two decades of historical trends. With softening demand, rising interest rates, inflation-driven input costs, and potential trade tariffs, both OEMs and suppliers face intense financial pressure. 

Line chart comparing OEM and supplier EBIT margins from 2018 to 2025.

Product costing in the modern automotive influences design decisions, sourcing strategies, margin control, and much more. From quoting new business to responding to OEM demands for detailed cost and CO₂ breakdowns, teams are under growing pressure to deliver reliable calculations, often across complex product variants and global production footprints. 

Yet despite this shift, many teams are still relying on tools that weren’t built for the scale, speed, or collaboration that today’s automotive industry requires. 

Manufacturers continue to manage their costing in local spreadsheets or legacy solutions – the systems that are difficult to maintain, prone to errors, and heavily dependent on individual experts. Outdated workflows slow down progress, introduce risk, and limit the ability to challenge supplier prices or reduce costs across the lifecycle.

Outdated Tools, Outdated Results  

Automotive manufacturing and tool costs are often calculated manually, based on logic built years ago in Excel or legacy software. Costing expertise sits with just a few individuals, and when they’re unavailable, progress slows to a crawl. File-based systems lead to confusion over versions, lost changes, and inconsistent logic across departments. 

It’s a pattern we hear again and again from cost engineers and buyers: 

  • "We spend too much time updating data manually instead of focusing on cost improvements.” 

  • “We can’t collaborate effectively using Excel - we lose track of changes and versioning.” 

  • “CO₂ data is being asked for more often, but we’re not equipped to deliver it.” 

  • “Our reference calculations are outdated, and we don’t trust the inputs.” 

These issues cause delay decisions, weaken negotiations, and increase the risk of quoting with inaccurate or outdated assumptions.  

In a high-stakes industry, slow and scattered costing processes cost more than time - they cost competitive advantage. 

What Companies Want from Their Costing Solution

Automotive manufacturers are not looking for more spreadsheets or isolated point solutions. They want a cloud-based costing tool that calculates quickly, updates itself automatically, and supports collaboration across teams and locations. 

They need to retain flexibility in calculations, without compromising on structure or data quality. Engineers want to adjust parameters and retain their internal logic, but they also want to rely on up-to-date reference data and automatic backups. Purchasing teams expect accurate supplier cost breakdowns that can be exported in specific formats. The CO₂ outputs should be generated alongside every calculation, not as an afterthought.  

More fundamentally, companies are looking to build consistency across their cost engineering activities. Whether it’s quoting new business, analyzing purchased parts, or benchmarking against competitors, they want everyone to work from the same logic, with the ability to dig into the details and adjust as needed. 

GUIDE

Still working with spreadsheets?

Spreadsheets weren’t built for modern cost engineering. Learn why automotive teams are replacing outdated tools and what to use instead.

 

What the Future of Automotive Costing Looks Like 

Always Current, Always Accessible 

  • Automated bottom-up calculations reflect real manufacturing logic 

  • Master data is updated continuously, with no need for manual backups or skipped updates 

  • Cost Engineers focus on analysis, not data maintenance 

Smarter Simulations, Better Outputs 

  • Simulations can be run instantly using 3D uploads, BOM files, or shape models 

  • Every calculation includes a complete CO₂ breakdown 

  • Output is structured for OEM-compliant exports 

Transparent, Collaborative Workflows 

  • Teams across countries and departments work in the same platform 

  • Standardized methodologies ensure consistency across projects 

  • Real-time access to data supports faster, more aligned decisions 

Insights That Drive Decisions 

  • Engineers trace cost drivers across the entire value chain 

  • Purchasing teams gain structured should-cost analyses for negotiations 

  • Scenario comparisons reveal savings potential and supply chain risks 

Knowledge That Stays with the Organization 

  • Costing logic becomes structured and shareable - not dependent on individuals 

  • New team members onboard faster, guided by standardized logic 

  • Existing workflows are retained and improved, not replaced from scratch 

Why automotive leaders are switching to Tset 

Tset was built with the reality of automotive costing in mind—from the demands of global suppliers to the CO₂ reporting required by OEMs. 

With Tset, companies gain: 

  • A modern, intuitive interface that’s usable even by non-cost engineers 

  • Fast, accurate cost results through automated calculations and 3D uploads 

  • Full flexibility to adjust and configure logic per team or customer 

  • Smooth collaboration across locations with automated versioning and backups 

  • Standardized should-costing, repeatable across projects and departments 

  • Reliable CO₂ breakdowns built into every single costing 

Tset product costing software features

WHITEPAPER

CO₂ targets are rising - are you ready?

Every costing decision now has a carbon consequence. Discover how leading automotive manufacturers approach carbon reduction with data-driven tools.

Conclusion

Tset gives automotive manufacturers a way to structure their costing logic, increase calculation accuracy, and align teams across regions. With automated outputs and built-in collaboration, cost engineering becomes faster, more reliable, and ready for the complexity of today’s vehicle programs.

Ready to bring speed and structure to your costing processes?

From should-costing to supplier negotiations, Tset brings structure and speed to your automotive cost management.

Book a demo

 

1. Why is product costing so critical in the automotive industry?

In automotive manufacturing, accurate product costing is essential for quoting new business, managing supplier negotiations, and maintaining margins across increasingly complex vehicle architectures. With rising cost pressure, variant diversity, and stricter CO₂ targets, cost engineers and buyers need fast, data-driven calculations they can trust.

2. What are the limitations of Excel in automotive?

Legacy software and spreadsheets fall short when managing complex costing logic, global production variants, and carbon reporting. They require manual data updates, are hard to standardize across plants, and are prone to version control issues. Automotive teams lose valuable time maintaining tools instead of improving cost structures.

3. What is should-costing in automotive and how does Tset support it?

Should-costing in automotive involves estimating the expected cost of purchased parts, tooling, or assemblies based on transparent inputs like material, labor, and overhead. Tset enables structured should-cost analysis with OEM-ready breakdowns, helping procurement challenge quotes and identify savings across supplier technologies.

4. How does Tset support collaboration across global automotive plants?

Tset runs in the cloud, enabling real-time collaboration across plants, departments, and suppliers. Teams always work from the same version, with automated backups, role-based access, and configurable logic that scales across locations—whether in Germany, Slovakia, Mexico, or China.

5. Is Tset suitable for teams outside of cost engineering?

Absolutely. While built for cost engineering, Tset is used by purchasing, sales, R&D, and controlling teams across the automotive value chain. Its intuitive UI, export options, and read-only access make it easy to collaborate across functions—even for users without costing backgrounds.

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