LTV — Customer Lifetime Value — is the total revenue you can expect from a customer throughout their entire relationship with your business. A customer paying $100/month who stays for 30 months has an LTV of $3,000.
It's one of the most important SaaS metrics because it tells you how much you can afford to spend acquiring customers and how valuable your retention efforts really are.
How to calculate LTV
The simple formula:
LTV = ARPU × Customer Lifetime
Where:
- ARPU = Average Revenue Per User (monthly)
- Customer Lifetime = 1 / Monthly Churn Rate
Example:
- ARPU: $80/month
- Monthly churn rate: 4%
- Customer Lifetime: 1 / 0.04 = 25 months
- LTV: $80 × 25 = $2,000
For more precision, account for gross margin:
LTV = (ARPU × Gross Margin %) × Customer Lifetime
If your gross margin is 80%:
- LTV: ($80 × 0.80) × 25 = $1,600
This "contribution margin" version tells you actual profit, not just revenue.
Why LTV matters
It sets your acquisition budget. If a customer is worth $2,000, you can afford to spend more acquiring them than if they're worth $500. LTV guides CAC (Customer Acquisition Cost) targets.
It quantifies retention value. Reducing churn from 5% to 4% might not sound dramatic, but it increases average lifetime from 20 to 25 months — a 25% increase in LTV.
It identifies valuable segments. Not all customers are equal. Enterprise customers with $1,000/month ARPU and 2% churn might have 10x the LTV of SMB customers at $50/month with 8% churn.
It drives strategy. High-LTV businesses can afford premium acquisition channels, white-glove onboarding, and dedicated customer success. Low-LTV businesses need efficient, scalable motions.
LTV benchmarks
LTV varies enormously by business model:
| Business Type | Typical LTV Range |
|---|---|
| Consumer apps | $30-200 |
| SMB SaaS | $500-2,000 |
| Mid-market SaaS | $2,000-15,000 |
| Enterprise SaaS | $15,000-100,000+ |
| E-commerce subscription | $100-500 |
More important than the absolute number is the LTV:CAC ratio (see below).
The LTV:CAC ratio
The relationship between Lifetime Value and Customer Acquisition Cost determines business viability.
LTV:CAC Ratio = LTV / CAC
| Ratio | Interpretation |
|---|---|
| < 1:1 | Losing money on every customer — unsustainable |
| 1:1 - 2:1 | Barely breaking even — hard to scale |
| 3:1 | Healthy — industry benchmark for SaaS |
| 4:1 - 5:1 | Very efficient — room to invest more in growth |
| > 5:1 | Excellent, but maybe under-investing in acquisition |
A 3:1 ratio means for every $1 spent on acquisition, you get $3 in lifetime value. This gives room for operating costs, R&D, and profit.
How churn destroys LTV
The LTV formula includes customer lifetime, which is directly tied to churn. Small churn differences have huge LTV impact.
| Monthly Churn | Avg Lifetime | LTV (at $100 ARPU) |
|---|---|---|
| 2% | 50 months | $5,000 |
| 3% | 33 months | $3,300 |
| 4% | 25 months | $2,500 |
| 5% | 20 months | $2,000 |
| 8% | 12.5 months | $1,250 |
| 10% | 10 months | $1,000 |
Going from 5% to 3% churn doesn't sound like much, but it increases LTV by 65%. That's why churn reduction — including fixing involuntary churn from payment failures — is so valuable.
The involuntary churn connection
Involuntary churn silently drains LTV. If 2% of your 5% monthly churn is from failed payments, that's 40% of your churn that's fixable.
Example:
- Current: 5% churn, $100 ARPU → LTV = $2,000
- Fix involuntary churn (2% → 0.5%): 3.5% total churn → LTV = $2,857
- Impact: +$857 LTV per customer (+43%)
Multiply that by your customer base, and proper dunning and payment recovery dramatically increases your total customer value.
LTV by customer segment
Averaging LTV across all customers hides important variation. Segment to find insights:
By plan/tier:
- Free users: $0 LTV
- Starter plan: $500 LTV
- Pro plan: $2,000 LTV
- Enterprise: $15,000 LTV
By acquisition channel:
- Organic/referral: Often highest LTV (pre-qualified)
- Content marketing: High LTV (educated buyers)
- Paid search: Medium LTV (intent-based)
- Social ads: Often lowest LTV (impulse signups)
By cohort:
- Customers from 2024: Different LTV than 2025 cohort
- Seasonal effects (holiday signups vs regular)
This segmentation helps you focus resources on high-LTV channels and segments.
Increasing LTV
Three levers:
1. Increase ARPU
- Raise prices (carefully)
- Upsell to higher tiers
- Add premium features
- Usage-based pricing components
2. Extend customer lifetime (reduce churn)
- Improve product value
- Better onboarding
- Proactive customer success
- Fix payment failures with proper dunning
3. Improve retention efficiency
- Reduce support costs
- Automate success touchpoints
- Build self-serve resources
LTV pitfalls
Using historical churn for projections. If you just improved churn from 6% to 4%, your historical LTV understates current customer value.
Ignoring segment differences. Blended LTV hides that enterprise customers are 10x more valuable. Strategy should differ by segment.
Forgetting about payback period. A $3,000 LTV is great, but if customers take 18 months to become profitable, you have cash flow issues.
Over-optimizing for LTV. Sometimes accepting lower LTV customers is right — they might refer higher LTV customers, or you need volume for market position.
LTV and business decisions
LTV should inform major decisions:
Product roadmap: Features that reduce churn for high-LTV segments get priority.
Marketing spend: Channels that deliver high-LTV customers justify higher CAC.
Sales model: High LTV supports inside sales or field sales; low LTV requires self-serve.
Customer success investment: Proactive success makes sense when LTV justifies the cost.
Dunning investment: Tools that improve payment recovery have clear ROI when you know your LTV.
If a $100/month dunning tool helps you recover 20 additional customers per month, and each customer has $2,000 LTV, that's $40,000 in preserved lifetime value monthly — 400x ROI.