Editorial attribution: BizCalcAtlas editorial team. Formula and source provenance follow the published methodology.
LTV to CAC Ratio: Marketing Decision Guide explains LTV CAC ratio with the same definitions and calculation method used by the linked tools. Use the method for a consistent scenario, then verify any current rate, legal rule, or platform policy against the cited source.
Answer in brief
LTV to CAC = contribution LTV / CAC CAC payback periods = CAC / contribution per customer per period
Scope and definitions
This guide owns the informational intent; linked calculator pages continue to own interactive calculator intent.
The guide supports Customer Lifetime Value Calculator; Customer Acquisition Cost Calculator; Cost per Acquisition Calculator. Keep the numerator, denominator, cost categories, fee base, and time period consistent from the first input through the final comparison.
Calculation method
| Step | Calculation or rule |
|---|---|
| 1 | LTV to CAC = contribution LTV / CAC CAC payback periods = CAC / contribution per customer per period |
Formula / rule
LTV to CAC = contribution LTV / CAC
CAC payback periods = CAC / contribution per customer per period
Worked example
A cohort has modeled contribution LTV of $360 and CAC of $90, producing a 4.0x ratio. If monthly contribution is $18, simple undiscounted CAC payback is five months.
Practical reference
Record the relevant scenario fields together before calculating. The implementation brief calls for these comparison fields: Input, Example. Using one record prevents values from different periods or scopes from being mixed.
Common mistakes
- Using a different definition or time period from the one specified by the LTV CAC ratio method.
- Comparing outputs from Customer Lifetime Value Calculator; Customer Acquisition Cost Calculator; Cost per Acquisition Calculator without holding the shared assumptions constant.
- Treating a worked scenario as a universal target instead of testing the inputs that apply to the business.
- Relying on an undated secondary claim when the listed first-party or official source governs a current rate or rule.
Frequently asked questions
Is there one universally correct LTV-to-CAC target?
LTV to CAC Ratio: Marketing Decision Guide uses the defined method and scope above. Keep the calculation consistent with Customer Lifetime Value Calculator; Customer Acquisition Cost Calculator; Cost per Acquisition Calculator and do not treat the example as a universal recommendation.
Should LTV use gross revenue?
The answer depends on the scenario and assumptions. Use the stated method for LTV CAC ratio, then test the result with the linked calculators and verify any current rate or rule against the listed sources.
Why calculate payback too?
Use this method: LTV to CAC = contribution LTV / CAC CAC payback periods = CAC / contribution per customer per period Keep every input on the same period and definition basis.
Should blended and channel CAC be mixed?
The answer depends on the scenario and assumptions. Use the stated method for LTV CAC ratio, then test the result with the linked calculators and verify any current rate or rule against the listed sources.
How this guide was created and tested
- Method basis: the guide uses the same definitions and method boundaries as the linked calculator family and the audited implementation package.
- Validation coverage: the linked calculators currently contribute 6 audited release test vectors to the underlying calculation methods used by this guide.
- Source hierarchy: current rates, fees, laws, or platform rules prefer government and first-party sources; educational and industry references are supporting evidence rather than silent overrides.
- Automation and AI: automation or AI may assist drafting, organization, source grouping, and regression work, but it is not treated as an authoritative source and cannot replace the cited evidence or audited formula.
- Editorial responsibility: MIASIN S.R.O. controls publication, source policy, corrections, and release decisions. No named individual expert review is claimed unless a page explicitly identifies one.
Read the full Methodology, Editorial Standards, and Corrections Policy.
Sources and review
Sources are ordered by authority: government or official sources first, then first-party platform sources, educational references, and finally supporting industry references.
- First-party / platform source: Stripe
- First-party / platform source: Stripe
- Educational reference: OpenStax
- Educational reference: OpenStax
Last reviewed: September 30, 2026
Source set reviewed: September 30, 2026
Next scheduled review: March 30, 2027
Review guidance: Recheck cohort matching, CAC scope, retention and payback assumptions.