Contribution-Margin LTV vs Revenue LTV in the Calculator Output
Revenue LTV and contribution-margin LTV can differ by 2-4x for the same customer. Here's which one to feed your bid optimizer, which one to put in the board deck, and why the calculator defaults to the conservative number.
Contribution-Margin LTV vs Revenue LTV
Two ways to score a customer's future value: gross sales (revenue LTV) versus the cash left after COGS, payments, shipping and returns (contribution-margin LTV).
Revenue LTV is the simpler number: forecast a customer's gross sales over their lifetime and stop there. Contribution-margin LTV applies the variable cost stack — cost of goods, payment fees, fulfilment, returns and discount allowances — to that same forecast, leaving you with the cash that's actually available to fund acquisition, overhead and profit.
The Retention Lift LTV Calculator defaults to contribution-margin LTV because every downstream decision — paid-media bidding, payback-period targets, channel ranking — breaks if you optimise against revenue you never get to keep. Revenue LTV still has a role; it's just not the number you bid against.
The choice matters because the two numbers diverge sharply. On a typical Shopify apparel store running a 38% gross margin with 18% returns and 3% payment fees, revenue LTV will sit roughly 2.5-3x higher than contribution-margin LTV for the same cohort.
Plug the larger number into Meta's bid optimiser and you'll over-pay for clicks for months before payback reality catches up. Plug the smaller number into a board deck and you'll under-sell a business that genuinely is growing. Both numbers are valid; the failure mode is using one where the other belongs.
Typical gap between revenue LTV and contribution-margin LTV by vertical (24-month horizon)
| Vertical | Gross margin | Return rate | Revenue LTV (€) | Contribution-margin LTV (€) | Gap |
|---|---|---|---|---|---|
| Apparel (mid-AOV) | 38% | 18% | €420 | €138 | 3.0x |
| Beauty / skincare | 62% | 4% | €310 | €172 | 1.8x |
| Consumer electronics | 22% | 9% | €680 | €121 | 5.6x |
| Home & decor | 45% | 12% | €510 | €198 | 2.6x |
| Supplements (subscription) | 55% | 2% | €640 | €328 | 2.0x |
| Footwear | 42% | 22% | €480 | €144 | 3.3x |
The pattern: the higher your return rate and the thinner your gross margin, the more dangerous it is to bid against revenue LTV. Electronics is the extreme — a 5.6x gap means a channel that looks profitable at €100 CAC against revenue LTV is hemorrhaging cash against contribution-margin LTV.
When revenue LTV actively misleads
Revenue LTV misleads most when you use it to compare channels with different return profiles. Meta-acquired apparel buyers return at 20-25%; Google Shopping buyers researching a specific SKU return at 8-12%. Revenue LTV treats both as equivalent. Contribution-margin LTV correctly downgrades the Meta cohort.
It also misleads on discount-heavy cohorts. A buyer acquired through a 30% welcome code looks identical to a full-price buyer in revenue LTV until you net out the discount allowance. In contribution-margin terms, the discounted buyer often needs 2-3 more orders to reach the same value.
Never feed revenue LTV into a bid optimiser
Meta Advantage+, Google Smart Bidding and Klaviyo's predictive CLV all accept a customer value signal. Sending revenue LTV teaches the algorithm to chase top-line growth at the expense of margin — exactly the failure mode that produced the 2022-2024 wave of DTC brands hitting scale and discovering they were unprofitable. Send contribution-margin LTV (or a payback-capped variant) and let the bidder optimise against the number your finance team actually cares about.
Which number goes where
Board decks and investor updates: report both, but lead with contribution-margin LTV and the implied LTV:CAC ratio. Sophisticated investors will ask for the margin-based number anyway; presenting revenue LTV alone reads as either naive or evasive.
Bid optimisers, channel-mix decisions, payback-period targets, agency briefs and creative budget allocation: contribution-margin LTV, always. Revenue LTV is appropriate for top-line forecasting, merchandising decisions (which SKUs drive repeat purchase volume) and warehouse capacity planning — places where you genuinely care about units shipped rather than cash retained.
Cumulative LTV by month: revenue vs contribution-margin (apparel cohort)
Revenue LTV
Contribution-margin LTV
Frequently asked questions
Gross LTV (also called revenue LTV) is total forecast sales per customer. Net LTV usually means contribution-margin LTV — sales minus variable costs like COGS, payment fees, shipping and returns. Some teams use 'net LTV' to mean post-tax or post-overhead, so always clarify which costs are netted out before comparing figures across companies.
Because every meaningful downstream decision — bid caps, payback-period targets, LTV:CAC ratios — needs the cash you actually keep, not the revenue you book. Defaulting to the conservative number prevents the most common failure mode: optimising paid media against revenue that gets eaten by returns and COGS.
No. Contribution margin is variable costs only — COGS, payment processing, fulfilment, returns, discount allowances. Fixed costs (warehouse rent, salaries, software) belong below contribution margin in the P&L. Including them turns the number into something closer to fully-loaded profit per customer, which is a different metric and isn't comparable across companies.
For most online retail businesses, contribution-margin LTV lands at 25-45% of revenue LTV. The exact ratio depends on gross margin and return rate: a high-margin subscription supplement brand might see a 1.8-2x gap, while a thin-margin electronics store can see 5-6x. Run the math on your own COGS rather than assuming a benchmark.
Report both, but lead with contribution-margin LTV and the resulting LTV:CAC ratio. Revenue LTV alone reads as either inexperienced or deliberately rosy to anyone who's underwritten a DTC business. Showing both numbers and the gap also demonstrates you understand your own unit economics.
Yes, and you should. Both platforms accept a custom value parameter via the conversions API or enhanced conversions. Send contribution-margin LTV (or a 90-day predicted version of it) instead of order value, and the bidder will optimise toward customers worth more in cash terms — not just customers who place large first orders that get returned.
Contribution-margin versus revenue is one axis of LTV measurement; the other axes are time horizon (12, 24, 36 months), prediction method (historical, cohort projection, predictive ML), and cohort definition (acquisition channel, first-product, discount status). The choice between gross and net LTV sits underneath all of those — pick the margin treatment first, then layer the other choices on top.
Deduct both sides: subtract the returned revenue from gross sales AND add the return processing cost (reverse logistics, restocking, refund payment fees, write-offs on damaged returns) as a variable cost. Most teams under-count returns by only doing the revenue side, which overstates contribution-margin LTV by 4-8 percentage points in return-heavy categories.
No. Marketing is the CAC side of the LTV:CAC equation, not a deduction from LTV itself. Keep contribution-margin LTV as the value generated per customer post-acquisition, then compare it to fully-loaded CAC (paid media spend plus agency fees plus tooling) separately. Mixing them produces a single number that's hard to diagnose when it moves.
Recompute contribution-margin LTV monthly because the input costs move — COGS shifts with supplier pricing, payment fees change with channel mix, return rates spike in Q1 after gifting season. Revenue LTV is more stable and quarterly is usually enough. Whenever margin assumptions change by more than 2 percentage points, rerun both and re-baseline your bid caps.
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