Unit Economics

Overview

Framework

IRON LAW: If Unit Economics Are Negative, Growth = Faster Death

Scaling a business with negative unit economics means losing more money
faster. "We'll make it up in volume" only works if variable costs per unit
decrease with scale (economies of scale). If they don't, more volume = more losses.

Prove unit economics are positive BEFORE investing in growth.

Key Metrics by Business Model

Analysis Steps

1. Define the unit: What is one "unit"? (customer, order, trip, seat)
2. Calculate revenue per unit: What does each unit generate?
3. Calculate variable cost per unit: What does each unit cost?
4. Calculate contribution margin: Revenue - Variable cost
5. Layer fixed costs: At what volume do you cover fixed costs? (→ break-even)
6. Assess scalability: Do unit economics improve or degrade at 10x volume?

Output Format

# Unit Economics: {Business}

## Unit Definition
- Unit: {customer / order / trip}
- Time period: {monthly / per-transaction}

## Per-Unit Economics
| Metric | Value |
|--------|-------|
| Revenue per unit | ${X} |
| Variable cost per unit | ${X} |
| Contribution margin | ${X} ({X%}) |

## Scalability Assessment
| Volume | Unit Revenue | Unit Cost | CM | Notes |
|--------|-------------|-----------|-----|-------|
| Current ({N}) | ${X} | ${X} | {X%} | baseline |
| 3x ({N}) | ${X} | ${X} | {X%} | {economies of scale?} |
| 10x ({N}) | ${X} | ${X} | {X%} | {what changes?} |

## Verdict
{Positive/negative unit economics, scalability assessment, key lever to improve}

Examples

Correct Application

• Revenue per order: NT$350 × 30% take rate = NT$105
• Variable costs: Driver pay NT$65 + Payment fee NT$10 + Support NT$5 = NT$80
• Contribution margin: NT$25/order (23.8%) ✓
• At 10x scale: Driver pay drops to NT$55 (better routing), CM improves to NT$35 (33%)
• Verdict: Marginally positive, scale-dependent — needs volume for viability

Incorrect Application

• "Revenue per customer is NT$500, cost per customer is NT$200, so we make NT$300 per customer" — but excluded customer support (NT$150) and payment processing (NT$50). True margin is NT$100. Must include ALL variable costs per unit.

Gotchas

• "We'll achieve economies of scale": Maybe. Identify WHICH costs decrease with scale and by how much. Delivery driver pay may not decrease. Server costs for SaaS typically do.
• Contribution margin ≠ profit: CM covers variable costs only. You still need enough total CM to cover fixed costs (see Break-Even Analysis).
• Blended vs cohort: Blended unit economics across all customers hides that early customers (organic) may be profitable while recent customers (paid acquisition) are not.
• Negative unit economics can be strategic: Temporarily, in land-grab markets with network effects (ride-sharing, marketplaces). But the path to positive must be explicit.

Scripts

scripts/unit_economics.py

python scripts/unit_economics.py --help

python scripts/unit_economics.py --verify

References

• For CAC-LTV deep dive, see the biz-cac-ltv skill
• For break-even analysis, see the biz-breakeven skill