Calculate Your Customer Lifetime Value
Enter your SaaS metrics to see your LTV, LTV:CAC ratio, and payback period instantly.
Average Revenue Per User per month
Percentage of customers who cancel each month
Revenue minus cost of goods sold
Total cost to acquire one customer
Customer Lifespan
1 / Monthly Churn Rate
Simple LTV
ARPU x Lifespan
Gross Margin LTV
ARPU x Lifespan x Margin
LTV:CAC Ratio
Excellent
CAC Payback Period
Months to recover CAC
Part 1: What is LTV (Customer Lifetime Value)?
Customer Lifetime Value (LTV) is the total revenue a business can expect from a single customer account throughout their entire relationship. For B2B SaaS companies, LTV is arguably the most important metric because it determines how much you can afford to spend on sales, marketing, and customer acquisition.
The LTV Formulas
Simple LTV: ARPU x Customer Lifespan
LTV with Gross Margin: ARPU x Gross Margin x (1 / Monthly Churn Rate)
Customer Lifespan: 1 / Monthly Churn Rate
Watch: How to Increase SaaS Customer Lifetime Value
In this video, TK Kader explains why LTV is the most important SaaS metric and shares three strategies to dramatically increase your customer lifetime value.
Part 2: What is LTV:CAC Ratio?
LTV:CAC Ratio compares your Customer Lifetime Value to your Customer Acquisition Cost. This ratio is often called "the most important SaaS metric" because it tells you whether your unit economics are sustainable. If you're spending more to acquire a customer than they're worth, you'll never build a profitable business.
| LTV:CAC Ratio | Health | Interpretation |
|---|---|---|
| < 1:1 | Critical | Losing money on every customer |
| 1:1 - 3:1 | Unhealthy | Unsustainable unit economics |
| 3:1 - 5:1 | Healthy | Target range for most SaaS |
| > 5:1 | Excellent | May indicate underinvestment in growth |
Key insight: A 3:1 ratio means you earn $3 for every $1 spent on acquisition. This provides enough margin to cover overhead, invest in product development, and grow profitably. Below 3:1, you're likely struggling to reach profitability.
Watch: Calculating Your LTV:CAC Ratio
In this video, TK Kader breaks down exactly how to calculate your LTV:CAC ratio and explains why it's "the most important SaaS metric" for startup success.
Part 3: How to Calculate LTV (Step by Step)
Calculate Your ARPU
Divide your Monthly Recurring Revenue (MRR) by your total number of customers. Example: $100,000 MRR / 1,000 customers = $100 ARPU.
Determine Your Churn Rate
Calculate the percentage of customers who cancel each month. Example: 20 cancellations / 1,000 customers = 2% monthly churn.
Calculate Customer Lifespan
Divide 1 by your monthly churn rate. Example: 1 / 0.02 = 50 months average customer lifespan.
Apply Your Gross Margin
Multiply by your gross margin to get the profit-adjusted LTV. Example: $100 ARPU x 50 months x 70% margin = $3,500 LTV.
Calculate LTV:CAC Ratio
Divide your LTV by your Customer Acquisition Cost. Example: $3,500 LTV / $500 CAC = 7:1 LTV:CAC ratio.
"Customers who match your Ideal Customer Profile (ICP) typically have 2-3x higher LTV than non-ICP customers. The #1 way to increase your LTV is to sell to the right customers in the first place."
Part 4: 3 Strategies to Increase LTV
Based on TK Kader's framework, here are the three most effective ways to increase your Customer Lifetime Value:
Strategy 1: Focus on ICP-Fit Customers
Customers matching your Ideal Customer Profile have higher engagement and lower churn. They get more value from your product, which means they stay longer and spend more over time. The #1 way to increase LTV is to sell to the right customers in the first place.
Action: Review your Ideal Customer Profile and ensure sales is prioritizing ICP-fit prospects over anyone with a pulse.
Strategy 2: Increase ARPU Through Expansion
Grow revenue from existing customers through upsells, cross-sells, and usage-based pricing. Net Revenue Retention above 100% means your customer base is growing even without new sales. This multiplies LTV without increasing CAC.
Action: Build expansion paths into your product tiers and pricing model. Train customer success to identify expansion opportunities.
Strategy 3: Reduce Churn With Proactive Success
Every month of reduced churn multiplies your LTV. Better onboarding decreases time-to-value. Proactive customer success prevents at-risk accounts from churning. Small improvements in churn have massive compounding effects on lifetime value.
Action: Track leading indicators of churn (login frequency, feature adoption) and intervene before customers cancel.
Part 5: How LTV Connects to Your ICP
Your Ideal Customer Profile directly determines your LTV. ICP-fit customers get more value from your product, which leads to:
- Higher engagement — They actually use your product because it solves a real problem
- Lower churn — They don't cancel because they're getting ongoing value
- More expansion — They're likely to upgrade and buy more over time
- Better referrals — Happy customers refer other ICP-fit companies
The bottom line: If your LTV:CAC ratio is unhealthy, don't just throw more money at acquisition or slash your CAC. First, examine whether you're selling to the right customers. A tighter ICP focus often fixes unit economics faster than any other lever.
LTV Glossary: Key Terms
- LTV (Lifetime Value)
- Total revenue expected from a customer over their entire relationship.
- CLV (Customer Lifetime Value)
- Same as LTV—the terms are used interchangeably.
- ARPU
- Average Revenue Per User—monthly revenue divided by customers.
- MRR
- Monthly Recurring Revenue—predictable monthly subscription revenue.
- ARR
- Annual Recurring Revenue—MRR multiplied by 12.
- Churn Rate
- Percentage of customers who cancel in a given period.
- CAC
- Customer Acquisition Cost—total cost to acquire one customer.
- LTV:CAC Ratio
- Lifetime value divided by acquisition cost. Target is 3:1+.
- Gross Margin
- Revenue minus cost of goods sold, expressed as a percentage.
- Payback Period
- Months required to recover CAC through gross profit.
Frequently Asked Questions
- What is LTV (Customer Lifetime Value)?
- Customer Lifetime Value (LTV) is the total revenue a business can expect from a single customer account throughout their entire relationship. For SaaS companies, LTV is calculated by multiplying Average Revenue Per User (ARPU) by Customer Lifespan by Gross Margin. LTV helps you understand how much you can afford to spend on customer acquisition.
- How do you calculate LTV for SaaS?
- The standard SaaS LTV formula is: LTV = ARPU x Gross Margin x (1 / Monthly Churn Rate). For example, if your ARPU is $100/month, gross margin is 70%, and monthly churn is 2%, your LTV = $100 x 0.70 x 50 = $3,500.
- What is a good LTV:CAC ratio?
- A healthy LTV:CAC ratio is 3:1 or higher, meaning you earn $3 in lifetime value for every $1 spent acquiring a customer. Below 1:1 means you're losing money on every customer. 1:1 to 3:1 is unsustainable long-term. Above 5:1 may indicate you're underinvesting in growth.
- How does LTV connect to ICP?
- Customers who match your Ideal Customer Profile (ICP) typically have 2-3x higher LTV than non-ICP customers. ICP-fit customers get more value from your product, have higher engagement, lower churn, and are more likely to expand their usage over time.
- What is the difference between LTV and CLV?
- LTV (Lifetime Value) and CLV (Customer Lifetime Value) are the same metric—both refer to the total revenue expected from a customer over their entire relationship with your company. The terms are used interchangeably in SaaS.
- What is CAC payback period?
- CAC payback period is the number of months it takes to recover your Customer Acquisition Cost through gross profit. It's calculated as: CAC / (ARPU x Gross Margin). A good SaaS payback period is under 12 months.
Ready to Build Your Unstoppable ICP?
Now that you understand LTV, learn how to build a 3-part Ideal Customer Profile that attracts high-LTV customers. ICP-fit customers have 2-3x higher lifetime value.
Read the Full ICP Guide →