Revenue vs. Margin LTV
Should you calculate LTV using total revenue, or actual profit? This is one of the most common debates in finance and marketing. Using the wrong one can lead to burning cash on ads or critically undervaluing your business. Here is how to know which one to use.
The Difference (In Plain English)
The distinction between the two comes down to what you're trying to measure: top-line growth or bottom-line sustainability.
Revenue-Based LTV
The total amount of money a customer pays you over their lifetime. It completely ignores the costs required to deliver your product or service.
Total Revenue = $1,000 Standard Metric Margin-Based LTV
The total amount of gross profit a customer generates. It subtracts Cost of Goods Sold (COGS) like hosting, physical product costs, and shipping.
$1,000 - $400 COGS = $600 Better for Spend Decisions When to use Revenue LTV
By default, when people say "LTV," they usually mean Revenue LTV. It's the industry standard for reporting and valuation, especially in software and SaaS.
- Valuations: Investors value SaaS companies on revenue multiples, not gross profit multiples. Revenue LTV aligns with how the business is valued.
- SaaS Margins are High: If your gross margin is 85-90% (like many software tools), the difference between Revenue LTV and Margin LTV is small enough that calculating margin isn't worth the extra complexity.
- Simplicity: It's much easier to track total payments than it is to accurately attribute specific COGS to individual customers.
When to use Margin LTV (Profit LTV)
If you're making decisions about how much to spend to acquire a customer (CAC), you must use Margin LTV. If you use Revenue LTV to set your CAC targets, you will almost certainly lose money.
Imagine a DTC brand selling a $100 jacket. The jacket costs $60 to manufacture and ship (40% gross margin).
- Revenue LTV: $100
- Margin LTV: $40
If the marketing team uses Revenue LTV and spends $50 to acquire a customer, they think they're profitable ($100 > $50). In reality, they are losing $10 on every order ($40 profit - $50 CAC = -$10).
You should absolutely rely on Margin LTV if you are in e-commerce, retail, hardware, agencies, or any business where your Gross Margin is less than 70%.
The Gross Margin Shortcut
Calculating cohort-level contribution margin can be an annoying data engineering task. The easiest way to get Margin-based LTV is to just calculate your standard Revenue LTV, and multiply it by your company's blended Gross Margin percentage.
Margin LTV = Revenue LTV × Gross Margin % Where Gross Margin % = (Total Revenue - COGS) ÷ Total Revenue If your Revenue LTV is $500, and your company's overall Gross Margin is 60%:
Margin LTV = $500 × 0.60 = $300 Use this $300 figure when deciding how much you can afford to pay Facebook or Google for a new user.
Industry Guide: Which to Choose?
| Business Type | Typical Gross Margin | Primary LTV to Use | Why? |
|---|---|---|---|
| B2B SaaS | 80% - 95% | Revenue LTV | Margins are so high that COGS is negligible. Investors care about ARR growth. |
| Consumer Apps / Gaming | 70% - 85% | Revenue LTV | App store fees (15-30%) are consistent. Easy to use Revenue LTV with a flat deduction. |
| E-commerce / Retail | 20% - 60% | Margin LTV | COGS varies wildly by product. You MUST use margin or you will go bankrupt on ads. |
| Agencies / Services | 30% - 50% | Margin LTV | Human labor is expensive. Revenue is vanity; project margin is reality. |
| Marketplaces (Uber/Airbnb) | 10% - 30% (Take Rate) | Margin LTV | You only keep a small cut of the GMV. You must track LTV purely on your net revenue/margin. |
Stop arguing about formulas
Finsi OS clearly separates Revenue LTV from Margin LTV in all dashboards, so sales gets their top-line number and performance marketing gets their CAC limits.
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