{"uid":"cap_Q6-G7u7SS79sFJPjAgjRc","slug":"pricing-math-saas-subscription-metrics-calculator-279005a3","name":"Pricing Math – SaaS Subscription Metrics Calculator","description":"MRR, ARR, customer lifetime, annualised churn and LTV from customers, ARPU and monthly churn, with optional CAC payback.","url":"https://pricing-math.x402tookit.com/subscription?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["customers","arpu","monthlyChurnPct"],"properties":{"cac":{"type":"number","description":"Customer acquisition cost, for LTV:CAC and payback"},"arpu":{"type":"number","description":"Average monthly revenue per customer"},"customers":{"type":"number","description":"Current paying customers"},"grossMarginPct":{"type":"number","description":"Gross margin percent applied to LTV (default 100)"},"monthlyChurnPct":{"type":"number","description":"Monthly customer churn, percent (above 0, up to 100)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"arr":{"type":["null","number"]},"ltv":{"type":["null","number"]},"mrr":{"type":["null","number"]},"asOf":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"ltvToCac":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"grossMarginPct":{"type":["null","number"]},"cacPaybackMonths":{"type":["null","number"]},"annualisedChurnPct":{"type":["null","number"]},"averageLifetimeMonths":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iS-XpjJINgfBxCq8gIAqi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates MRR, ARR, average customer lifetime, annualised churn, and LTV from customer count, ARPU, and monthly churn rate, with optional CAC payback and LTV:CAC ratio.","exampleAgentPrompt":"We have 850 paying customers, ARPU of $120/month, and monthly churn of 2.5%. Our CAC is $400 and gross margin is 75% — can you calculate our MRR, ARR, LTV, LTV:CAC ratio, and CAC payback period?","exampleUseCases":[{"title":"Investor deck SaaS metrics snapshot","prompt":"I'm preparing a pitch deck — we have 1,200 subscribers, $89/month ARPU, 1.8% monthly churn, $350 CAC, and 80% gross margin. Can you work out our MRR, ARR, LTV, LTV:CAC, and how many months to pay back CAC?"},{"title":"Evaluating churn impact on lifetime value","prompt":"Our monthly churn just jumped from 3% to 5% and our ARPU is $50 with 600 customers. What does that do to our LTV and annualised churn, assuming 70% gross margin?"},{"title":"Bootstrapped SaaS unit economics check","prompt":"I've got 200 customers paying $199/month on average, with 1.2% monthly churn and no external CAC since we're bootstrapped. What are my MRR, ARR, average customer lifetime, and LTV?"}],"resultDescription":"Returns a JSON object containing MRR, ARR, average lifetime in months, annualised churn percentage, LTV, and optionally LTV:CAC ratio and CAC payback months. Also includes a summary, verdict, and disclaimer fields, plus a degraded flag and reasons array if any inputs caused partial computation.","failureModes":["Missing required parameters (customers, arpu, or monthlyChurnPct) returns a 400-level error","monthlyChurnPct of 0 or negative is invalid and will be rejected","Extremely high churn (approaching 100%) may produce near-zero lifetime values","CAC payback and LTV:CAC are omitted from the response if cac is not supplied","grossMarginPct defaults to 100 if not provided, which may overstate LTV for low-margin businesses"],"whenToPreferThis":"Use this endpoint when you need standard SaaS subscription metrics — MRR, ARR, LTV, churn conversion, and CAC payback — computed correctly and instantly without writing formulas yourself. Ideal for investor reporting, unit economics checks, and scenario modelling where inputs are customer count, ARPU, and monthly churn. Prefer this over generic calculators when you also need LTV:CAC and CAC payback in the same response.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T00:35:07.949Z","isFirstParty":false,"canonicalSlug":"pricing-math-saas-subscription-metrics-calculator-279005a3"}