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Substack Newsletter LTV to CAC Ratio Calculator
Free ltv to cac ratio calculator built for Substack Newsletter founders: plug in your numbers, get instant 2026 benchmarks, and export a Markdown report.
Interactive Studio
Step 1 · Configure Inputs
Your Metrics & Parameters
Adjust values or drag sliders — outputs recalculate live.
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Engine Methodology
LTV to CAC Ratio Calculator: LTV = (ARPU × GrossMargin%) ÷ MonthlyChurn% · LTV:CAC = LTV ÷ CAC · Payback = CAC ÷ MonthlyGrossContribution
Top-Quartile Benchmark
LTV:CAC Ratio & Payback
4.03x LTV:CAC
Each customer generates $2,541 in gross-margin LTV over an average 45.5-month lifespan, yielding a 4.03:1 LTV:CAC ratio and 11.3-month CAC payback.
Customer Lifetime Value (LTV)
$2,541
45.5 mo avg tenure
LTV : CAC Ratio
4.03 : 1
Target >= 3.0 : 1
CAC Payback Period
11.3 mos
Target <= 12 months
Monthly Gross Contribution
$55.90
86% gross margin on $65.00 ARPU
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2026 Reference Data
Industry benchmarks. How your saas & startup finance metrics compare.
| Benchmark Metric | 2026 Standard | Founder Context |
|---|---|---|
| Top-Quartile B2B SaaS LTV:CAC | 4.0x – 6.5x | 3.0x is the standard venture & bootstrapped threshold. |
| Median CAC Payback Period | 6 – 14 months | PLG and self-serve products target < 6 months. |
| Healthy Net Revenue Retention (NRR) | 105% – 125% | Expansion revenue offsets gross logo churn. |
How to use this tool. Three steps from raw inputs to founder-ready output.
- 01
Enter your startup metrics or copy inputs
Fill in the fields in the Substack Newsletter LTV to CAC Ratio Calculator workspace above, or click "Load Example" to populate verified saas & startup finance benchmark data.
- 02
Review real-time calculations & benchmark grades
Inspect the primary output, supporting unit metrics, and diagnostic rules that update instantaneously in your browser with zero server round-trips.
- 03
Copy the report or deploy your launch plan
Click 'Copy Result' to export the clean Markdown output or code snippet, then launch your product on FoundrList to compound organic traffic and high-DR backlinks.
Formula & methodology. Transparent math with zero black-box assumptions.
Core Calculation
LTV to CAC Ratio Calculator: LTV = (ARPU × GrossMargin%) ÷ MonthlyChurn% · LTV:CAC = LTV ÷ CAC · Payback = CAC ÷ MonthlyGrossContribution
With default 2026 baseline inputs, the Substack Newsletter LTV to CAC Ratio Calculator produces 4.03x LTV:CAC (LTV:CAC Ratio & Payback). Each customer generates $2,541 in gross-margin LTV over an average 45.5-month lifespan, yielding a 4.03:1 LTV:CAC ratio and 11.3-month CAC payback.
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