Business Model Validation

Testing if you can acquire customers profitably and build a sustainable business, not just a cool product.

The Critical Question

You have validated:

• Problem exists
• Your solution works

You still need to prove:

• Can you acquire customers profitably?
• Will they pay enough?
• Can you retain them?
• Does the math work?

Many products die here. Cool solution, but cannot make money.

Business Model Basics

Revenue Model Types

1. Direct sales (B2B)

   • Sell to businesses
   • Higher prices ($1,000-100,000+)
   • Longer sales cycles (1-12 months)
   • More expensive to acquire
   • Higher retention

2. Self-serve (B2B / B2C)

   • Customer signs up online
   • Lower prices ($10-500/month)
   • Quick sales cycle (minutes to days)
   • Cheaper to acquire
   • Lower retention

3. Freemium

   • Free basic version
   • Paid premium features
   • Conversion: 2-5% typical
   • High volume needed
   • Viral growth important

4. Marketplace

   • Connect buyers and sellers
   • Take % of transaction (10-30%)
   • Need both sides (chicken-and-egg problem)
   • Network effects crucial
   • Hard to start, powerful when working

5. Advertising

   • Free for users
   • Monetise attention
   • Need massive scale (millions)
   • Privacy concerns increasing
   • Race to the bottom on prices

6. Usage-based

   • Pay for what you use
   • Examples: AWS, Twilio
   • Scales with value
   • Predictable for customer
   • Requires metering

Choosing Your Model

Unit Economics

The most important math for your business.

Key Metrics

CAC (Customer Acquisition Cost):

CAC = total spent on acquisition / number of customers

Example:

• Spent $5,000 on ads
• Got 50 customers
• CAC = $100

LTV (Lifetime Value):

LTV = average revenue per customer x average lifespan

Example:

• $50/month subscription
• Customer stays 24 months
• LTV = $1,200

The golden rule: LTV should be 3x CAC or higher.

LTV $1,200 / CAC $100   = 12x   excellent
LTV $1,200 / CAC $400   = 3x    good
LTV $1,200 / CAC $600   = 2x    risky
LTV $1,200 / CAC $1,200 = 1x    failing

Calculating CAC

Include all acquisition costs:

• Advertising spend
• Sales team salaries
• Marketing tools
• Content creation
• Events / conferences
• Partner commissions

Formula:

CAC = (total marketing + sales costs) / new customers acquired

Example:

Google Ads:      $2,000
Content writer:  $1,000
Sales rep:       $5,000
Tools:           $500
New customers:   40
CAC = $8,500 / 40 = $212.50

Calculating LTV

Method 1: simple (for subscriptions)

LTV = ARPU x average customer lifetime

• ARPU (Average Revenue Per User): $50/month
• Lifetime: 18 months
• LTV = $900

Method 2: churn-based

LTV = ARPU / churn rate

• ARPU: $50/month
• Monthly churn: 5%
• LTV = $50 / 0.05 = $1,000

Method 3: detailed

LTV = (ARPU x gross margin) / churn rate

• ARPU: $50/month
• Gross margin: 80%
• Monthly churn: 5%
• LTV = ($50 * 0.8) / 0.05 = $800

Improving Unit Economics

Increase LTV:

• Raise prices
• Add upsells
• Reduce churn
• Increase usage
• Annual billing

Decrease CAC:

• Improve conversion rates
• Organic channels (SEO, content)
• Referral programs
• Community building
• Product-led growth

Pricing Validation

The Pricing Test

Do not ask: "How much would you pay?"

• People lie low
• Not realistic

Do ask: "At what price would you..."

• Definitely buy (too cheap means you are leaving money on the table)
• Consider buying (sweet spot)
• Not buy (too expensive)

Example results from 50 people:

Sweet spot: $20-30, where "definitely + consider" is highest while maximising revenue.

The Van Westendorp Analysis

Four questions:

1. At what price is it too expensive?
2. At what price is it expensive but worth considering?
3. At what price is it a bargain?
4. At what price is it too cheap to trust?

Plot the curves. Optimal price is where "too expensive" and "too cheap" intersect.

Pricing Tiers

The "Good, Better, Best" approach.

Example: project management tool

Rules:

• Middle tier should be the obvious choice
• Price difference: 3-4x between tiers
• Most customers choose middle
• Top tier for power users

Common Pricing Mistakes

Customer Acquisition Channels

The Bullseye Framework

Test 19 channels. Find your 1-3 winners.

This is the framework from Traction by Gabriel Weinberg and Justin Mares.

Channels to test:

Viral / organic:

1. Viral growth
2. SEO (organic search)
3. Content marketing
4. Social media (organic)
5. Community building
6. PR

Paid:

7. Google Ads
8. Facebook / Instagram Ads
9. LinkedIn Ads
10. Display advertising
11. Sponsorships

Direct:

12. Sales team
13. Cold email
14. LinkedIn outreach
15. Partnerships
16. Affiliate programs

Platform:

17. App stores
18. Marketplaces (AWS, Shopify)
19. Integrations

Channel Validation Process

For each channel:

Week 1: research

• Who uses this channel successfully?
• What does it cost?
• What is typical conversion?
• Do we have required assets?

Week 2: small test

• Spend $500 or 10 hours
• Measure results
• Calculate CAC
• Assess quality of leads

Week 3: decide

• Keep (CAC < 1/3 LTV)
• Iterate (promising but needs work)
• Kill (does not work)

Focus on channels where:

• CAC is profitable
• You have a unique advantage
• You can scale

Channel-Specific Benchmarks

The Pre-Sale Test

Ultimate validation: get them to pay before you build.

How to Pre-Sell

1. Define the offer

   • What they get
   • When they get it
   • Price (often discounted)
   • What is included

2. Create a simple page

   • Problem statement
   • Your solution
   • Social proof (if any)
   • Call to action: "Reserve your spot"

3. Payment options

   • Full payment (best validation)
   • Deposit ($100-500)
   • Letter of intent (weakest but still good)

4. Set success criteria

   • $5,000 in sales = validated
   • 50 deposits = validated
   • 20 LOIs = maybe validated

The Pre-Sale Pitch

Template:

We're building [solution] for [customer]. It will [benefit].

What you get:
- [Feature 1]
- [Feature 2]
- [Feature 3]

Timeline: launching in [timeframe]

Early bird price: $X (regular price will be $Y)

Risk-free: full refund if not satisfied.

Ready to be a founding customer?

Pre-Sale Success Stories

Examples:

• Kickstarter: entire business model is pre-sales
• Dropbox: video got 75,000 signups
• Buffer: landing page got 100+ signups in 1 week
• Superhuman: waitlist of 150,000+ before launch

The power: real money beats expressed interest.

Churn and Retention

Why Retention Matters

Example: $100/month subscription.

Scenario A: 10% monthly churn

• Month 1: 100 customers = $10,000
• Month 12: 28 customers = $2,800
• LTV: $1,000

Scenario B: 5% monthly churn

• Month 1: 100 customers = $10,000
• Month 12: 54 customers = $5,400
• LTV: $2,000

Halving churn doubled LTV.

Acceptable Churn Rates

If churn is too high, fix it before scaling acquisition.

Measuring Retention

Cohort analysis:

Look for:

• Is retention improving over time?
• Where is the drop-off (month 2, 6, 12)?
• Do certain segments retain better?

Improving Retention

Onboarding (critical first 7 days):

• Welcome email
• Setup checklist
• Quick wins
• Personal outreach

Engagement:

• Regular touchpoints
• New features
• Content / education
• Community

Preventing churn:

• Usage alerts
• Proactive support
• Win-back campaigns
• Cancel surveys

The Business Model Canvas

A one-page business model from Alexander Osterwalder.

Fill this out before building your full product.

Validation Checklist

Before launching:

[ ] Tested pricing with 50+ people
[ ] Identified optimal price point
[ ] Calculated target CAC
[ ] Calculated expected LTV
[ ] LTV/CAC ratio is 3x or better
[ ] Tested 5+ acquisition channels
[ ] Found 1-2 profitable channels
[ ] Achieved pre-sales or strong commitments
[ ] Set up payment processing
[ ] Defined success metrics
[ ] Know your churn target
[ ] Have a retention plan
[ ] Business model canvas completed
[ ] Unit economics work on paper

Red Flags

Kill or pivot if:

Cannot get to a profitable CAC.

• Tested 10+ channels
• All have CAC > LTV
• No path to profitability

Cannot charge enough.

• Market will not pay enough
• Value delivered is too low
• Free alternatives exist

Churn is catastrophic.

• 10%+ monthly churn
• Cannot improve with effort
• Customers do not see value

Sales cycle is too long.

• 12+ months to close
• Need a huge team
• Cannot afford the burn rate

Moving to MVP Testing

You now know:

• Your pricing
• Target CAC and LTV
• Acquisition channels
• Unit economics work
• Customers will pay

Resources

Calculators:

• LTV / CAC calculator
• Churn calculator
• Pricing calculator

Books:

• Traction by Gabriel Weinberg
• The 1-Page Marketing Plan by Allan Dib
• Obviously Awesome by April Dunford

Tools:

• Stripe (payments)
• ProfitWell (SaaS metrics)
• ChartMogul (analytics)
• Baremetrics (metrics)

Next Steps

Continue to 06-mvp-testing.md to build the MVP, launch to early customers, and iterate toward product-market fit.