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1. LTV/CAC above 3x: The minimum threshold for a sustainable business. Below 3x, you are spending too much to acquire customers relative to what they generate. Above 5x is excellent.
2. CAC payback under 12 months: You need to recover acquisition cost within a year. For lending fintechs, the first loan EMI cycle should recover CAC. For SaaS, 6-12 months is the target.
3. Gross margin above 50%: For product-led fintechs (SaaS, platforms), 70%+ is the target. For lending fintechs, 40-60% is normal after cost of funds. Below 40% means the unit economics require massive scale to work.
The common trap: Many fintechs show healthy LTV/CAC on paper by projecting 3-5 year customer lifetime. But fintech customers are notoriously disloyal. Actual retention is 40-60% after year 1 for many consumer fintechs. Use conservative retention assumptions (not optimistic ones) to calculate LTV.

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FAQs about Fintech Unit Economics Calculator
LTV/CAC compares the lifetime value of a customer to the cost of acquiring them. 3x or higher is considered healthy for most fintechs. Below 1x means you lose money on every customer. It is the single most important unit economics metric for any subscription or recurring revenue business.
Under 12 months is ideal for venture-backed fintechs. 12-18 months is acceptable for enterprise or high-ARPU products. Above 18 months signals either too-high CAC or too-low monetization. For lending fintechs, payback should align with average loan tenure.
SEO and content marketing (lowest CAC channel long-term), referral programs (existing customers acquire new ones), partnerships with banks and NBFCs (shared acquisition cost), improving conversion rate on existing traffic, and moving from paid to organic acquisition channels over time.
LTV uses gross margin, not revenue, because it measures actual profit per customer. A lending fintech with Rs 1,000 monthly interest income but Rs 700 cost of funds has only Rs 300 gross profit. Using revenue inflates LTV and gives a false picture of economics.
Churn is the denominator of LTV. Reducing monthly churn from 5% to 3% increases average customer life from 20 to 33 months and LTV by 65%. Churn reduction is often the highest-leverage activity for improving unit economics, more impactful than reducing CAC or increasing ARPU.
Scale when: LTV/CAC is consistently above 3x across a representative customer cohort, CAC payback is under 12-18 months, at least 3-6 months of cohort data confirms retention assumptions, and you have identified at least 2 scalable acquisition channels. Scaling before this wastes capital.
Lending: highest ARPU but also highest risk cost (defaults). Effective LTV must account for expected credit losses. Payments: low per-transaction revenue but high volume and stickiness. Scale is everything. Insurance: commission-heavy upfront with renewal income. LTV depends heavily on renewal rates which take 12+ months to measure.