The back-of-envelope math and due-diligence checks pros run

• OEM (Original Equipment Manufacturer): the automaker (Toyota, VW, Ford, Stellantis).
• Tier 1: a supplier that sells directly to the OEM (Bosch, Continental, ZF, Magna). Tier 2 sells to the Tier 1.
• SAAR (Seasonally Adjusted Annual Rate): a monthly sales figure stretched into a yearly pace, stripping out seasonality. When you read "US SAAR hit 16.2 million," it means "at this month's pace, the year would total 16.2 million."
• BEV / PHEV / ICE: Battery Electric Vehicle / Plug-in Hybrid / Internal Combustion Engine.
• Registrations: the standard way Europe counts sales (a car is counted when registered).

Calculation 1: Revenue per unit

The simplest and most abused number. Take total revenue, divide by units sold.

A premium OEM reports $80 billion revenue on 2 million vehicles:

$80,000,000,000 / 2,000,000 = $40,000 revenue per unit

The check: revenue per unit is not price. It bundles financing, parts, and services. A mass-market brand might sit near $25,000 per unit; a luxury brand far higher. If someone quotes "$40,000 average price" but it is really revenue per unit including their captive finance arm, that is a red flag.

Calculation 2: Content per vehicle (CPV)

CPV is how much dollar value a supplier captures on each car. It is the single most important number in the supplier world.

CPV = supplier revenue on a platform / vehicles produced on that platform

A braking supplier earns $120 million on a platform that builds 1.5 million vehicles:

$120,000,000 / 1,500,000 = $80 CPV

Why pros love it: CPV lets you forecast. If EVs add power electronics and the supplier's CPV rises from $80 to $140, that is a 75% content increase even if unit volumes stay flat. This is the core EV investment thesis for suppliers: same cars, more content per car.

The check: always ask "built or sold?" and "gross or net of the customer's discounts?" Production and sales diverge sharply when inventories swing.

Calculation 3: Breakeven volume

Automotive is a brutal fixed-cost business. A plant, tooling, and an engineering program cost the same whether you sell 50,000 or 500,000 units.

Breakeven volume = fixed costs / (price per unit, variable cost per unit)

A new model program:

• Fixed costs (plant retooling, engineering): $2 billion
• Price per unit: $35,000
• Variable cost per unit: $27,000
• Contribution margin per unit: $35,000 - $27,000 = $8,000

Breakeven = $2,000,000,000 / $8,000 = 250,000 units

If the program only sells 180,000, it loses money no matter how good the reviews are. This is why platform sharing (multiple models on one architecture) matters so much: it spreads that fixed cost across more units, dropping the breakeven per model.

🎬 [VIDEO: "How Car Companies Actually Make Money" - youtube.com - a clear breakdown of automotive unit economics and why volume and platforms dominate profitability]

Calculation 4: Market shareMarket shareThe percentage of total industry sales your company captures in a given period. It measures competitive position relative to rivals in a defined market.View full definition → from registrations

Share is almost always calculated from registration or sales data, not revenue.

Brand share = brand units / total market units

A brand registers 550,000 cars in Europe in a year where total registrations are 11 million:

550,000 / 11,000,000 = 5.0% market share

The check: define the denominator. "Market shareMarket shareThe percentage of total industry sales your company captures in a given period. It measures competitive position relative to rivals in a defined market.View full definition →" of what? Total light vehicles? Passenger cars only? BEVs only? A brand can claim "20% EV market sharemarket shareThe percentage of total industry sales your company captures in a given period. It measures competitive position relative to rivals in a defined market.View full definition →" while holding 4% of the total market. Both are true; only one is impressive. Always pin down the base before you react.

You can pull real registration data yourself from ACEA press releases for Europe, updated monthly.

The due-diligence red-flag checklist

Before you trust any automotive claim, run these fast checks.

1. Built vs sold vs registered

Production, wholesale (shipped to dealers), and retail (sold to customers) are three different numbers. In a demand slump, an OEM can "sell" 2 million to dealers while consumers buy 1.7 million. Inventory piles up. If a growth story uses production while the market weakens, be suspicious.

2. Units vs revenue vs value

A company can grow revenue while losing units (raising prices in a shrinking market) or grow units while destroying margin (discounting). Ask which metric is moving and why.

3. Global vs regional

"We are the #1 EV brand" almost always hides a "in country X" qualifier. China, Europe, and the US are radically different markets. A leader in one can be invisible in another.

4. The order-book trap

"We have 500,000 reservations" means little if reservations are refundable $100 deposits. Ask conversion rateconversion rateThe percentage of visitors or prospects who complete a desired action (purchase, sign-up, contact form), calculated as conversions divided by total opportunities.View full definition → and cancellation rate.

5. Content per vehicle vs win rate

A supplier claiming huge CPV growth needs new program wins to realize it. Ask: on which future platforms are you designed in, and when does that start of production (SOP) happen? A CPV that only exists on programs launching in 2029 is a promise, not revenue.

6. The capacity utilization check

A plant running below roughly 80% utilization is usually bleeding cash in this industry. If someone brags about a new gigafactory, ask what percent of capacity is actually running.

Putting it together: a worked mini-case

A Tier 1 pitches you: "Our EV thermal management wins take CPV from $90 to $210, and we are on platforms totaling 3 million units."

Run the math:

• Incremental CPV: $210 - $90 = $120
• Revenue potential: $120 x 3,000,000 = $360 million incremental

Now run the checks:

• Built or sold? They say the 3 million is peak annual production, not current.
• SOP timing? Programs launch 2027 to 2029. Nothing hits this year.
• Win probability? Half those platforms are "quoted," not "awarded."

Adjusted view: maybe $180 million, arriving gradually from 2027, contingent on winning quotes. Same pitch, very different number. That reframing, done in two minutes on the back of an envelope, is the entire skill.

A note on EV-specific numbers

Two figures pros carry for 2025 to 2026 (both estimates, verify against current data):

• BEV share of new sales: roughly 15 to 20% in Europe and around 8 to 10% in the US, with wide monthly swings and heavy policy sensitivity (source: ACEA and US analysts).
• Battery pack cost: has fallen dramatically over the past decade toward the low $100s per kWh at pack level (estimate; commonly cited by BloombergNEF battery surveys). Multiply by pack size: a 75 kWh pack at $115/kWh is roughly $8,600 of raw pack cost, a huge share of an EV's bill of materials.

Key Takeaways

• Memorize the anchors: US roughly 16 million light vehicle sales, EU roughly 10 to 11 million car registrations, global roughly 88 to 90 million (all 2025 estimates). Every claim gets sanity-checked against these.
• CPV x volume is the supplier revenue engine. Always ask "built or sold, awarded or quoted, and what SOP year?"
• Breakeven is about fixed costs and contribution margin. A great car that misses its volume still loses money; platforms exist to lower that breakeven.
• Pin the denominator on any market share claim: total market, passenger cars, or a narrow segment like BEVs. The base changes everything.
• The five-second reflex: units vs revenue, built vs sold vs registered, global vs regional, and timing. Reframe every headline before you trust it.