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Subscription payback checker
Give it LTV, margin, CAC and cash. Get max CAC, a score out of 100 and a call.
Subscription payback checker is a free AI skill for the job "Make an offer people want". Give the instructions to an AI assistant that supports the required files and tools, then review its output.
Free · No account · Made by AI Blocks · Level: advanced · Thinking: high
What it does
A subscription can look great on paper and still empty your bank account. You pay to win the customer today and get your money back over many months. Until then, every new subscriber is a cash gap. If you grow faster than your cash allows, you run out before the cohorts pay back. Prepaid and quarterly plans add a second risk. They raise AOV, but if your CAC rises as much, you are no better off. This skill is the store version of a subscription economics check. It works out lifetime value at month 3 and 6, the most you can pay per subscriber, the first-order loss and the cash needed across your payback window. It compares monthly, quarterly and annual plans on first-order profit against CAC. It scores how safe the plan is and gives a call you can act on. It needs real cohort data.
You give it
- Value of subscribers and non-subscribers at month 3 and 6
- Gross margin, monthly price and subscription discount
- Current CAC, monthly ad spend and cash balance
- Take rate of any multi-month plan you already have (optional)
- Brand brain (optional)
- Your offer (optional)
You get
- Max CAC at a 3 to 1 ratio and at your own ratio
- The loss per customer on order one, and the cash needed to reach payback
- First-order gross profit and break-even CAC for each plan
- A score out of 100 with its reasons, and a call: go, slow down or switch to bundles
Use it when
- You are about to push a subscription, and want to know how much you can pay per subscriber.
- You are thinking of a quarterly or prepaid plan and need to know if it really beats the monthly one.
- You are scaling ad spend on subscriptions and want to see if your cash will last until the cohorts pay back.
How to use it
- Start a chat with the skill. Open it if you added it to your AI, or copy it and paste it in.
- Paste your month-3 and month-6 value for subscribers and non-subscribers, your margin and your current CAC.
- Paste your monthly ad spend and the cash you can put toward payback.
- If you offer or plan a quarterly or prepaid plan, add its price and take rate.
- Read the cash needed first, then the score and the call.