Definition
Customer lifetime value (LTV) is the total profit a customer will generate over the entire relationship with your company. It's the revenue they'll bring minus the cost of serving them.
Formula: LTV = (Average Annual Revenue per Customer) x (Gross Margin) x (Average Customer Lifespan in Years)
If a customer pays you $50,000 per year, your gross margin is 70%, and they stay for four years, LTV is roughly $140,000.
Why It Matters for B2B GTM
LTV tells you how much you can afford to spend acquiring a customer. It's the ceiling on your CAC. If LTV is $200,000, you can afford to spend up to $200,000 to acquire that customer (though healthy businesses cap CAC at 20-30% of LTV).
LTV also defines your entire business model. If LTV is low, you need high volume. If LTV is high, you can afford a long, expensive sales cycle and small sales teams. LTV shapes strategy.
How It Works
Calculate Average Annual Revenue
Look at your current customer base. What's the average contract value per year? Mix of $10k and $100k customers? Average them out.
Determine Gross Margin
Revenue minus cost of goods sold (hosting, support, third-party tools you pay for). Not operating margin; just the margin on delivering the product. If you bring in $50,000 and it costs $15,000 to serve that customer, your gross margin is 70%.
Estimate Customer Lifespan
How long does a customer stay? If you have churn data, use it. If not, estimate. SaaS: 3-5 years typical. Enterprise: sometimes 7-10 years. The longer they stay, the higher the LTV.
Account for Expansion
If your customers tend to expand (buy more seats, upgrade tiers), their annual revenue grows over time. A customer who starts at $20k might hit $50k by year three. Use the expanding figure, not the starting price.
Improving LTV
LTV grows when customers expand, renew longer, or require less support. The levers:
- Improve product so customers don't churn (longer lifespan)
- Build features that drive upsells (higher annual value)
- Reduce support costs (higher margin)
- Move customers to self-service (lower costs)
Most teams neglect LTV because sales is flashier. But doubling LTV is often easier than halving CAC.
LTV vs CAC
The relationship between these two defines your sustainability. A 3:1 LTV-to-CAC ratio is healthy. Some SaaS companies operate at 5:1 or higher. Below 2:1 and you're burning money.
How Abmatic Helps
We analyze your customer base to identify high-LTV segments, find expansion opportunities, model churn scenarios, and help Sales target high-LTV accounts.
FAQ
Q: Different LTVs by segment?
A: Yes. Enterprise might be $500k. SMB $50k. Build GTM around the highest-LTV segment.
Q: How to factor churn?
A: Use historical rates. If 20% churn annually, your average lifespan is shorter.
Q: Recalculate when?
A: Annually minimum. More often if you change pricing, churn, or business model.
