Invest in a new product line
Who this is for
Founder led lower-middle market companies with 5 to 50 million in annual revenue that see an adjacent opportunity and want to de risk the bet.
The quick answer
Invest when a clear customer problem aligns with your strengths and when the path to gross margin is visible. Validate with paid interest, not surveys. Confirm delivery capacity and the effect on cash. Start with a small beachhead and a simple offer. Stop if margin or demand thresholds are not met by a set date.
The method in eight steps
- Write the thesis 
 Customer, painful problem, and the outcome they will pay for. Name the capability that gives you an edge.
- Prove demand with money 
 Collect letters of intent, deposits, pre orders, or paid pilots. Avoid surveys and soft interest alone.
- Model unit economics 
 Price, bill of materials or cost to serve, expected volume, warranty or support cost, and target gross margin by quarter.
- Check capacity and partners 
 Confirm supply, skills, and tools. Identify partners where they reduce risk or speed the path.
- Build the beachhead offer 
 One use case, one configuration, one service plan. Keep options off the table until the core works.
- Set stage gates 
 Write demand and margin thresholds and the dates to assess. Include a stop rule if thresholds are not met.
- Plan cash 
 Map build costs, deposits, inventory cycles, and credit needs. Align with your banking facility or alternative finance.
- Decide scale or stop 
 Run a simple review at each gate and choose scale, improve, or exit. Capture lessons either way.
Example
A twenty five million services company tested a monitoring add on. Ten customers paid for pilots and three pre paid for the first year. Unit economics hit target margin and the firm scaled with a narrow offer for one segment.
Pitfalls and fixes
- Building for many use cases at once. Focus the first offer. 
- Trusting stated interest. Get deposits or paid pilots. 
- Ignoring cash. Model working capital and covenant impact. 
Checklist
- Written thesis with clear edge 
- Paid signals of demand 
- Unit economics and gross margin path 
- Capacity and partner plan 
- Stage gates with thresholds and dates 
- Cash plan validated with finance 
Related links
Considering an adjacent line but want proof before you spend. Contact Founded Partners and we will design the stage gates and the paid demand test with you.
