Northline Meal Prep: Scaling a Paid Channel on Twelve Conversions
Northline Meal Prep is a two-year-old subscription business with 640 active subscribers paying an average of $62 per month. Food, packaging, and delivery consume 45% of revenue, and subscribers cancel at 8% per month. Blended acquisition cost across all channels last quarter was $85 per paying subscriber. In March the founder spent $6,000 on a three-week paid-social test in one metro area: 480 landing-page visits produced 40 free-trial starts and 12 paying subscribers. Trial-to-paid conversion elsewhere runs near 9%. Northline's own 10-meal plan is priced at $69 per week. She proposes moving the entire $25,000 quarterly marketing budget to that channel and has asked for a go/no-go by Friday. Meanwhile, the largest regional competitor announced a 20% price cut on its 10-meal plan, and two prospects cited price in lost-sale notes last month.
1. Compute monthly contribution per subscriber, estimated lifetime value, the blended and test acquisition costs, and the resulting LTV:CAC ratios. State your assumptions and the limits of the estimate.
Read the worked answer
- Contribution per subscriber: $62 × 55% = $34.10 per month.
- Average life: 1 ÷ 0.08 = 12.5 months. This assumes constant churn, which is optimistic for early cohorts where a few bad weeks can cancel everything.
- LTV: $34.10 × 12.5 = $426 (undiscounted, no expansion revenue).
- Blended CAC: $85, giving LTV:CAC ≈ 5.0 and payback of about 2.5 months - strong on its face.
- Test CAC: $6,000 ÷ 12 = $500, giving LTV:CAC ≈ 0.85 and payback of about 14.7 months, longer than the average subscriber stays.
Limits. Twelve conversions is a very small sample; a 95% interval around a 12-of-40 conversion rate is roughly ±14 percentage points, so the true CAC could plausibly be $250 or well over $1,000. The trial cost is excluded from the $500. The honest finding is not that the channel definitively fails, but that the test produced no evidence of a scalable CAC - and its point estimate loses money on every customer acquired.
2. Should the founder move the full $25,000 quarterly budget to this channel? Recommend a decision and a concrete decision rule, using the evidence.
Read the worked answer
No - do not commit the full $25,000. The two numbers that matter are $500 cost per paying subscriber against $426 of lifetime value. Volume would multiply a loss, not a gain.
What to do instead.
- Re-run at a size that can answer the question. Cap the next test at $8,000–$9,000 and size it for 60–80 paid conversions, so a 20% swing in CAC is detectable.
- Set the kill rule in advance: proceed only if CAC ≤ $200 (LTV:CAC ≥ 2) and payback ≤ 4 months. Writing it down before the test prevents post-hoc rationalization.
- Diagnose the funnel. 480 visits to 40 trials (8.3%) is healthy, but 40 trials to 12 paid (30%) is more than triple the 9% seen elsewhere - suspicious enough to check whether the trial offer attracted discount-seekers. Track 60-day retention of those 12, not just conversion.
- Protect the blended $85. If organic and referral channels really deliver $85, growth can come from those while paid is tested.
The founder's instinct may eventually be right, but a Friday deadline is not evidence.
3. The competitor cuts prices 20%. Using Northline's unit economics, recommend a response and explain why matching the cut is or is not justified.
Read the worked answer
Do not match reflexively. A 20% cut on the $69 plan removes $13.80 of revenue against $34.10 of contribution - roughly a 40% reduction in contribution per subscriber. Holding LTV:CAC at 5 would require halving CAC to about $43, which the test data give no reason to expect. At current churn, matching would cut LTV to roughly $256.
Test what the cut is actually buying. Two lost-sale notes citing price is not evidence of price elasticity; it is two data points. Ask every declining prospect for the next 60 days a scripted question about budget versus menu variety, delivery window, and skip flexibility.
Recommended posture.
- Hold list price on the core plan.
- Add a smaller entry plan (for example six meals at about $45) to capture price-sensitive prospects without repricing the base and resetting every existing subscriber's expectation.
- Spend on retention instead: skip-week flexibility and a win-back offer aimed at the 8% churn, which is cheaper per retained dollar than a 20% price cut.
- Revisit only if win-rate data shows the competitor taking a measurable share of the target segment.