Unit economics
Unit economics modeling and CAC payback analysis
Clear, defensible cash-payback math.
Cohort models demonstrating exact CAC:LTV margin values.
Unit economics answer whether the business makes money on each customer: what it costs to acquire them, what margin they generate and how long it takes to earn back the acquisition cost. Many companies scale paid acquisition without knowing these numbers precisely — and discover too late that growth was buying unprofitable customers.
We build unit economics models by channel and cohort: fully loaded customer acquisition cost, contribution margin after product, fulfilment and payment costs, lifetime value from real repeat behaviour, and CAC payback. Then we identify the levers that improve them as you grow.
The problem
Scaling paid spends without understanding customer payback speeds can drain working capital. Scaling requires accurate financial modeling.
What we do
- Model customer lifetime value decay
- Calculate CAC payback timelines
- Audit contribution margins
- Set channel spend limits
What you get
- Interactive unit economics spreadsheets
- LTV decay calculations
- Channel spend threshold charts
- Pricing options models
Absolute mathematical clarity on ad spend boundaries and contribution profitability.
How it runs
- Audit Costs. We clean your product cost structure to calculate true contribution margins.
- Model Decay. We compile historical transaction records to measure cohort lifetime values.
- Chart Payback. We calculate the exact number of months required to recover ad acquisition costs.
- Define Caps. We set maximum ad spend thresholds per channel to protect margins.
Who this is for
- D2C and e-commerce brands scaling paid media without a clear view of profit per customer
- SaaS and subscription businesses preparing board or investor metrics
- Founders deciding how much they can afford to pay to acquire a customer
- Finance and marketing teams that disagree on what CAC is
What's included
- Fully loaded CAC by channel, including agency, tools and team costs where relevant
- Contribution margin per order or per customer
- Cohort-based LTV and repeat behaviour
- CAC payback period by channel and cohort
- Target CAC and bid guidance derived from the model
- A maintained model in Google Sheets or your BI tool
Why blended numbers mislead
Blended CAC — total marketing spend divided by total new customers — hides the channels that are losing money behind those that are not. Blended ROAS hides margin differences between products. Average LTV hides the fact that customers from some channels are worth far more than others. Decisions made on blended numbers tend to scale the wrong things.
We break the numbers down by channel, product and cohort so each source of customers is judged on its own economics. Our analysis of blended CAC and first-order contribution margin shows how this works for D2C brands.
Payback as the operating constraint
LTV:CAC ratios are useful for strategy, but payback period is what cash flow feels. A customer who repays their acquisition cost in two months lets you reinvest quickly; one who takes eighteen months ties up capital. We model payback by channel and use it to set acquisition targets that match how much cash the business can tie up. You can try the arithmetic yourself with our CAC payback calculator.
Building the unit economics model
We build your unit-economics model — CAC, LTV, contribution margin, payback — into one integrated framework, so you can see the health of a single customer at a glance.
Without an integrated unit-economics model, CAC, LTV, and margin live in separate places (if they exist at all), and no one can answer the core question: does each customer make or lose money, and how fast? You scale blind.
- 1. Integrate Vital Metrics: Combine CAC, LTV, contribution, and payback values into one model.
- 2. Granular Segmentation: Build out metrics by channel, country, and client segment tier.
- 3. Sensitive Assumptions: Map changes in retention and pricing to show model sensitivity lines.
- 4. Formulate Decision Rules: Frame model inputs so leadership can set expansion limits.
Improving unit economics as you grow
We optimize the levers of your unit economics — acquisition cost, conversion, retention, pricing — so scaling improves your margins instead of eroding them.
Plenty of companies scale revenue while quietly destroying economics — paying more to acquire than a customer returns, with payback periods that choke cash. Without optimizing the unit, growth makes the problem bigger.
- 1. Find Constraints: Analyze models to isolate the precise bottleneck in unit ratios.
- 2. Pull Leverage Levers: Optimize CAC, conversion speed, customer retention, and tier prices.
- 3. Implement Limits: Set strict limits on customer payback curves.
- 4. Model Validation: Re-model monthly cohorts to verify that margin improvements remain stable.
Frequently asked questions
What are unit economics?
The revenue and costs associated with a single customer or order — typically CAC, contribution margin, lifetime value and payback period — which show whether growth is profitable.
What is fully loaded CAC?
Customer acquisition cost including not just ad spend but the other costs of acquiring customers, such as agency fees, tools, creative production and sales costs, depending on the definition you adopt.
What is a good LTV:CAC ratio?
A commonly cited target is around 3:1, but the right ratio depends on margins, payback period and growth stage. Payback period is often the more practical constraint.
How is CAC payback calculated?
CAC divided by the monthly contribution margin a customer generates, giving the number of months to recover the acquisition cost.
Can you build the model in our existing tools?
Yes. Most models start in Google Sheets or Excel and move into your BI tool once the definitions are agreed.
Why use contribution margin instead of gross revenue?
Contribution margin reflects true cash profit left after product delivery costs, showing if campaigns are actually profitable.
How do you calculate CAC payback velocity?
By mapping customer transaction cadence to see how many days it takes for margin to equal ad spend.
Are the models customizable?
Yes, we deliver fully editable spreadsheet files for Google Sheets or Excel.
Pricing: monthly retainers by region
Every engagement is a monthly retainer priced on scope — never a percentage of ad spend. The range depends on the number of channels, markets and the depth of tracking and CRM work involved.
| Region | Monthly retainer |
|---|---|
| United States | $2,500–$6,000 per month |
| India | ₹1,00,000–₹5,00,000 per month |
| United Kingdom | £2,200–£5,000 per month |
| United Arab Emirates | AED 4,000–AED 10,000 per month |
| Australia | A$3,000–A$7,000 per month |
| Canada | C$3,000–C$7,000 per month |
| Singapore | S$3,000–S$7,000 per month |
| Europe | €2,500–€5,000 per month |