BudgetAnalyticsReferenceCheatsheet

LTV-to-CAC Thresholds: The Decision Sheet

LTV:CAC bands by business model, payback windows, repeat-rate multipliers and the allowable-CAC formula that turns lifetime value into a kill, tolerate or scale call.

Updated 2026-05-1411 min read

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LTV-to-CAC is the decision that decides whether a too-expensive CPA is actually fine. This sheet turns lifetime value, payback window and repeat rate into an allowable CAC, then into a kill, tolerate or scale call by business model — so you stop treating first-order break-even as the only bar that matters.

Allowable CAC is LTV divided by the ratio you will accept

If a customer is worth $180 in contribution over the window you actually measure, and you require a 3:1 ratio, you may pay $60 to acquire them. If you require 2:1, you may pay $90. That is the whole identity: allowable CAC = LTV ÷ target LTV:CAC. Teams skip it and argue about whether a $42 CPA 'feels high' against a $38 AOV, which is a first-order conversation pretending to be a lifetime one. Write the ratio first, compute the cap, then compare live CAC to the cap. Everything else in this sheet is how to estimate LTV honestly enough that the cap is not a fantasy.

The ratio is not universal — the model sets the band

One-and-done ecommerce should not be held to a SaaS 3:1 on 12-month LTV, because there is no 12-month LTV. Consumables should not be killed at 1.3 first-order ROAS if the 90-day ratio still clears 3:1. Info products can look like a 4:1 on paper until refunds land. Local services look expensive on CPL and cheap on closed-job LTV. The locked bands are per model: the ratio we treat as weak, acceptable and healthy, plus the payback window that ratio must arrive inside. If payback misses the window, a pretty ratio still fails — you cannot finance a 3:1 that shows up in month 18 when the card is due in month two.

Repeat rate is how AOV becomes LTV — use a multiplier, not a story

The lazy version of LTV is AOV × a made-up 'customers buy 4 times'. The version we use is: contribution per order × observed orders per buyer in a fixed window (90 days or 12 months), counted on a cohort, not on a lifetime dashboard that mixes 2019 buyers with last week. The multiplier table is the observed range of 12-month orders-per-buyer by vertical, so you can turn first-order contribution into LTV without inventing loyalty. If you do not have cohort data yet, use the low end of the multiplier, not the high end. Optimism in LTV is how accounts scale into insolvency.

The output is a decision, not a dashboard tile

Once you have allowable CAC and payback, the live CPA either: kills (ratio too thin and payback too slow), tolerates (first-order looks ugly, lifetime still clears), or scales (you are under-buying demand). That is the whole point of the sheet. If the decision is scale and creative is the bottleneck, batch more UGC from a product URL in Klip Kanvas — you have already earned the right to buy more customers, you just need ads that can spend. If the decision is kill, more creatives will not fix a 1.1:1 on a one-and-done SKU; AOV, margin or the offer has to move.

5 tables inside: LTV:CAC bands by business model, payback-window thresholds, repeat-rate multipliers that turn AOV into LTV, the allowable-CAC formula with worked rows, and the kill / tolerate / scale decision sheet.

LTV:CAC bands by business model (contribution LTV, observed)

One-and-done ecommerce (jewellery, many home, one-off equipment): Weak <1.5:1 · Acceptable 1.5-2.5:1 · Healthy 2.5:1+ · must mostly clear on first order
Consumable / replenishment (supplements, pet food, some skincare): Weak <2:1 · Acceptable 2-3:1 · Healthy 3-4:1 · 90d LTV, not day-zero
Subscription ecommerce / subscribe-and-save: Weak <2.5:1 · Acceptable 3:1 · Healthy 4:1+ · 2-3 billed cycles in the payback window
SaaS (annual LTV): Weak <2:1 · House bar 3:1 · Strong 4:1+ · logo retention in the LTV, not just month-1 ARPU
Info product / course: Weak <1.5:1 after refunds · Acceptable 2-3:1 · Healthy 3:1+ · reserve 8-15% refunds in LTV
Local services (closed-job LTV): Weak <2:1 · Acceptable 3:1 · Healthy 4-5:1 if repeat jobs exist
High-ticket one-time (AOV $400+): Weak <1.3:1 · Acceptable 1.5-2:1 · Healthy 2-3:1 · first-order must carry cash

Payback window — the ratio must arrive inside this clock

One-and-done ecommerce: 0-30d · if not paid back on order one (after returns), treat as fail
Consumable / replenishment: 60-90d · >120d is a cash-risk even at 3:1
Subscription ecommerce: 2-3 billing cycles · typically 60-90d on monthly
SaaS: <12 months · 12-18 months only if gross margin >75% and churn <4%/month
Info product / course: 0-30d after the refund window closes · reserve 14-30d refund lag
Local services: 0-14d on the first closed job · retainer 30-90d
Rule if window is missed: Pretty LTV:CAC still fails · raise first-order target to contribution break-even until the clock is proven

12-month repeat-rate multipliers (orders per buyer, observed ranges)

How to use: LTV ≈ AOV × contribution % × multiplier · use the low end until your own cohort exists
Apparel / fashion: 1.2-1.6x · returns can erase the extra 0.2-0.4
Skincare: 1.6-2.4x · 12-month orders/buyer
Supplements: 2.0-3.5x · subscribe-and-save at the high end
Pet food / consumables: 2.5-4.0x · 12-month orders/buyer
Home & kitchen: 1.1-1.4x · 12-month orders/buyer
Jewellery: 1.1-1.3x · 12-month orders/buyer
Fitness equipment: 1.1-1.4x · accessories may sit at 1.4-1.8x
Info product (upsell included): 1.1-1.8x · do not count unproven backend
SaaS: Do not use this multiplier · LTV = ARPU × gross margin × (1 ÷ churn) over the chosen horizon, capped at 12-24 months

Allowable CAC formula and worked rows

Core formula: Allowable CAC = LTV ÷ target ratio · LTV = AOV × contribution % × repeat multiplier
Consumable example: AOV $45 · contrib 50% · 2.4x · LTV $54 · at 3:1 allowable CAC $18 · at 2:1 $27
Skincare example: AOV $58 · contrib 62% · 1.8x · LTV $64.7 · at 3:1 allowable CAC $21.60 · at 2:1 $32.30
Jewellery example: AOV $160 · contrib 48% · 1.15x · LTV $88.3 · at 2:1 allowable CAC $44 · first-order CPA must live near that cap
SaaS example: ARPU $40/mo · GM 80% · 5%/mo churn · 12-month LTV ≈ $40×0.8×12×0.74 survival ≈ $284 · at 3:1 allowable CAC $95
Info example after refunds: AOV $147 · contrib 78% · refunds 12% · multiplier 1.2x · LTV ≈ $121 · at 2.5:1 allowable CAC $48
If live CAC > allowable at the model's healthy ratio: You are buying growth that the LTV cannot repay · pause scale, move AOV/margin, or accept a written loss

Kill / tolerate / scale decision sheet

Kill: LTV:CAC <1.5:1 on a one-and-done · or <2:1 on consumable with payback >90d · more ads will not fix it
Tolerate (keep spend, do not scale): First-order below BE but 60-90d LTV:CAC still in the acceptable band · cap budget, watch cash
Scale: LTV:CAC at/above the model's healthy band · payback inside the window · frequency still has room
Under-invested (scale harder): LTV:CAC ≥4:1 with unused auction room · you are leaving customers on the table · raise creative volume, then budget
False LTV (do not scale on it): Multiplier from blended lifetime dashboard, not a cohort · or includes wholesale/organic · recompute on paid cohort only
Cash override: Even a 3:1 fails if payback exceeds what the bank account can fund · buy to the first-order floor until cash catches up
Minimum cohort to trust LTV: 90d LTV: ≥200 buyers in the cohort · 12-month LTV: ≥200 buyers with a full 12 months of age · smaller samples use the low-end multiplier

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