Customer Lifetime Value Calculator
Calculate customer LTV three ways: simple average, cohort-based, or predictive. See the revenue curve for each customer over 12 months.
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What is Customer Lifetime Value (LTV)?
Customer lifetime value (LTV, also called CLV or CLTV) is the total revenue a business expects to earn from a single customer over the entire duration of their relationship. It is the north star metric for ecommerce profitability - more important than any single order, campaign, or channel metric.
The basic formula is: LTV = Average Order Value x Purchase Frequency x Customer Lifespan
A customer who spends $65 per order, purchases 3.2 times per year, and remains a customer for 2.5 years has an LTV of $520. That single number tells you the ceiling for what you can spend to acquire that customer while remaining profitable.
For Shopify merchants, LTV is the foundation of sustainable growth. Brands that understand their LTV can spend confidently on acquisition, knowing each customer will generate a predictable return. Brands that do not track LTV often overspend on acquisition or - just as dangerously - underspend and miss growth opportunities because they do not realize how valuable their customers actually are.
Simple vs Cohort vs Predictive LTV
Simple LTV
The simple formula (AOV x Frequency x Lifespan) is the fastest way to get a directional number. It works well for back-of-napkin planning, investor conversations, and early-stage brands with limited data. The downside is that it treats all customers as identical - it cannot account for differences in behavior across segments, channels, or product categories.
Confidence level: Low - useful for estimates, not for making significant spending decisions.
Cohort-Based LTV
Cohort analysis tracks groups of customers acquired during the same period (usually a month) and measures their spending over time. This reveals the actual revenue curve - how quickly spending drops off, whether there is a second purchase spike, and what the long-tail looks like. With 6-12 months of data, cohort-based LTV is significantly more accurate than the simple formula.
Confidence level: Medium to High - depends on how many months of data you have. 9+ months of data yields high confidence.
Predictive LTV
Predictive models use early customer behavior - specifically repurchase rates at 30, 60, and 90 days - to forecast lifetime value before you have full cohort data. This is valuable for new product launches, new market entries, or when you need to make acquisition decisions before cohort data matures. The model extrapolates a 12-month revenue curve using exponential decay from observed repurchase patterns.
Confidence level: Medium - useful for early signals but should be validated against actual cohort data as it becomes available.
What is a Good LTV:CAC Ratio?
The LTV:CAC ratio measures how much lifetime value you generate for every dollar spent on customer acquisition. It is the single most important ratio in ecommerce unit economics - the number that tells you whether your growth engine is sustainable or burning cash.
Strong unit economics. You may have room to invest more aggressively in growth.
Healthy and sustainable. This is the target range for most scaling DTC brands.
Acceptable but thin margins. Improve retention or reduce CAC to build more buffer.
Likely losing money after operating costs. Urgent need to improve LTV or reduce CAC.
The median LTV:CAC ratio across 21,000+ Shopify stores is 2.4x - meaning the average DTC brand is operating with thin margins on acquisition. Top-performing brands achieve well above this by combining efficient paid acquisition with strong organic channels, high repurchase rates, and premium pricing.
Importantly, LTV:CAC should be calculated per channel, not just as an overall average. Your email list might have a 10x ratio while paid social sits at 1.5x. Blending them into a single number hides the real story.
How to Increase Customer Lifetime Value
1. Increase Average Order Value
AOV is the fastest lever to pull. Product bundling, upsells at checkout, cross-sell recommendations, and minimum order thresholds for free shipping all increase the revenue per transaction. Even a 10% AOV increase compounds dramatically over a customer lifetime - turning a $500 LTV into $550 with zero additional acquisition cost.
2. Improve Repurchase Rates
The gap between a one-time buyer and a repeat customer is the biggest value driver in DTC. Post-purchase email sequences, subscription offers, replenishment reminders, and loyalty programs all push customers from one purchase to two - and from two to three. The 2025 DTC Mega Report shows the median 90-day repurchase rate is just 14.7%, meaning massive room for improvement.
3. Extend Customer Lifespan
Customer lifespan is how long someone remains an active buyer. Reduce churn by delivering exceptional product quality, responsive customer service, and consistent brand experience. Win-back campaigns targeting lapsed customers can reactivate a meaningful share of churned customers at a fraction of new acquisition cost.
4. Reduce Churn
Churn is the silent LTV killer. For subscription brands, reducing monthly churn by even a few percentage points can extend average customer lifespan significantly - a direct increase in LTV with no other changes. Monitor cancellation reasons, offer pause options instead of hard cancels, and invest in product improvements based on customer feedback.
5. Personalize the Experience
Personalized product recommendations based on purchase history and browsing behavior increase both AOV and repurchase rates. Brands that segment their email and ad messaging by customer behavior see significantly higher engagement than those sending one-size-fits-all communications. The goal is making each customer feel like the store was built for them.
6. Track LTV Automatically
You cannot improve what you do not measure. Manually calculating LTV from spreadsheets is slow, error-prone, and usually out of date by the time you act on it. Automated LTV tracking gives you real-time visibility into how value develops across cohorts, channels, and segments.
Lifetimely by Amp calculates cohort-based LTV automatically from your Shopify data - broken down by acquisition channel, product, and customer segment.
Learn more about Lifetimely