LTV:CAC Ratio Calculator — Free Online Calculator

Enter customer lifetime value, customer acquisition cost, gross margin percentage, and monthly churn rate. LTV to CAC ratio is core SaaS unit economics metric. Healthy B2B SaaS often targets three to one LTV CAC or higher. SaaS investors quote LTV CAC at three to one or better for efficient growth. Below one means destroy value on each acquired customer at current economics. Venture benchmarks often cite three to one LTV CAC for efficient B2B SaaS with gross margin above seventy five percent and net revenue retention above one hundred ten percent. Board level SaaS metrics review should include LTV CAC trend line not single quarter snapshot because improving churn or CAC efficiency moves ratio materially over four quarter window. Segment SMB versus enterprise LTV CAC separately when blended ratio hides unprofitable small customer acquisition subsidized by enterprise unit economics.

Review LTV, CAC, ratio, months to recover CAC, and benchmark band. Ratio below one means you lose money acquiring customers at current economics. Payback period under twelve months is common target for efficient SaaS. Cohort LTV improves when expansion revenue exceeds churn losses on installed base. Logo LTV differs from revenue LTV when expansion drives NRR above one hundred percent on cohort basis. Segment LTV CAC by customer size band when SMB and enterprise economics differ because blended ratio hides unprofitable SMB acquisition masked by strong enterprise unit economics. Improve LTV by reducing churn one point often beats equivalent CAC reduction on LTV CAC ratio math sensitivity. Payback period under twelve months reduces capital intensity required to fund growth at current LTV CAC ratio level sustainably. Venture board reviews LTV CAC trend over four quarters not single snapshot because unit economics improve gradually with retention focus investment. Blended CAC across organic and paid channels masks deteriorating paid efficiency when organic growth slows and sales team quota attainment drives higher fully loaded acquisition cost. Payback period in months complements LTV CAC ratio because capital tied up in customer acquisition affects cash runway independent of lifetime value headline metric. Expansion revenue from upsell lowers effective CAC on cohort basis when initial land deal subsidizes later module attach in product led growth motion. Churn before payback completion destroys economic value even when ratio appears healthy on static twelve month LTV snapshot.

Venture board reviews LTV CAC trend over four quarters not single snapshot because unit economics improve gradually with retention focus investment. Blended CAC across organic and paid channels masks deteriorating paid efficiency when organic growth slows and sales team quota attainment drives higher fully loaded acquisition cost. Payback period in months complements LTV CAC ratio because capital tied up in customer acquisition affects cash runway independent of lifetime value headline metric. Expansion revenue from upsell lowers effective CAC on cohort basis when initial land deal subsidizes later module attach in product led growth motion. Churn before payback completion destroys economic value even when ratio appears healthy on static twelve month LTV snapshot.

Use LTV:CAC Ratio Calculator whenever inputs change: after market moves, new contributions, or revised personal assumptions. Bookmark the page for quick reruns without installing software.

Enter customer lifetime value, customer acquisition cost, gross margin percentage, and monthly churn rate. Enter the sample inputs described in How it works to reproduce the scenario step by step.

Adjust one input at a time to see sensitivity. LTV:CAC Ratio Calculator updates instantly so you can stress test optimistic and conservative assumptions before acting.

Reach for LTV:CAC Ratio Calculator when evaluate saas subscription model efficiency with lifetime value and acquisition cost.. It suits quick what if analysis before trades, allocation changes, or plan updates.

Pair with related tools when the decision spans taxes, liquidity, or multi year projections beyond what one formula captures.

Copying outputs without checking input units or stale market prices is a frequent error with LTV:CAC Ratio Calculator. Confirm tickers, percentages, and dates before acting.

Running a single baseline scenario ignores tail risks. Stress test with conservative inputs and compare against related tools listed below when the decision is material.

LTV equals ARPU times gross margin divided by monthly churn rate. CAC equals S and M spend divided by new customers. Simplified steady state model. Simplified LTV uses constant churn. Enterprise SaaS with annual contracts should convert churn carefully. Constant churn LTV formula. Cohort curves improve accuracy for enterprise sales cycles. Cohort based LTV calculation improves accuracy versus blended average when enterprise sales cycles exceed twelve months. Segment reporting by customer size prevents blended ratio hiding enterprise CAC spike when SMB self serve channel remains efficient on standalone basis in board dashboard metrics review quarterly. LTV:CAC Ratio Calculator does not replace personalized advice. Fees, slippage, account specific rules, and behavioral constraints may change real world outcomes.

Quantify churn revenue impact with SaaS Churn Damage and growth margin balance with Rule of 40 on portfolios. Use those calculators when ltv:cac ratio calculator alone does not capture the full decision.

Internal links on portfolios.tools help you chain calculators: run LTV:CAC Ratio Calculator first, then validate edge cases with a specialized tool from the related section below.