LTV Calculation for SaaS: Models, Segmentation, and Growth Impact
Complete framework for calculating SaaS Lifetime Value with segmented churn by plan, inflation correction, and strategic use of LTV for CAC decisions, pricing, and product cohorts.
Develop a robust LTV model accounting for real market conditions—interest rates, inflation, segmented churn, and currency effects—enabling the growth team to make acquisition budget, pricing, and product decisions based on actual customer value per cohort.
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Prompt objective
Develop a robust LTV model accounting for real market conditions—interest rates, inflation, segmented churn, and currency effects—enabling the growth team to make acquisition budget, pricing, and product decisions based on actual customer value per cohort.
Real use case
The tax automation SaaS TaxFlow, based in Chicago, has plans from $29 to $299/month and has never calculated real LTV. The founder uses US competitor LTV as a benchmark for CAC spending, ignoring that churn in their market is 40% higher, interest rates affect present value, and each customer segment has radically different LTV.
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Prompt
Calculate complete LTV for [COMPANY NAME], a SaaS in [SECTOR] with the following plans: [PLAN 1 $X/month], [PLAN 2 $Y/month], [PLAN 3 $Z/month].\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n**Required Input Data:**\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n- MRR per plan: $[AMOUNT] each\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n- Monthly churn per plan: [%] each\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n- Cost of service per customer/month (COGS): $[AMOUNT]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n- Discount rate (use current central bank rate/12 as proxy): [%] per month\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n- Average CAC per channel: $[AMOUNT]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n**Model 1 — Simple LTV (baseline):**\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nSimple LTV = MRR / Monthly Churn\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nExample for Pro Plan ($99/month, 3% churn):\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nLTV = 99 / 0.03 = $3,300\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nLimitation: ignores costs, time, and time value of money\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n**Model 2 — LTV with Gross Margin:**\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nMonthly Margin = MRR - COGS\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nMargin LTV = Monthly Margin / Monthly Churn\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nFor Pro Plan (COGS $15/month):\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nMargin = 99 - 15 = $84\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nMargin LTV = 84 / 0.03 = $2,800\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n**Model 3 — LTV with Present Value (adjusted for cost of capital):**\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`python\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ndef ltv_present_value(mrr, cogs, monthly_churn, annual_interest_rate, periods=60):\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\n \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
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