Fintech app metrics

What are the key metrics for a fintech app?

The key metrics for a fintech app measure how many installs become verified, funded and regularly transacting customers, and what each of those customers costs and earns.

• Acquisition: cost per install and cost per action at each funnel step.
• Activation: activation rate to sign-up, KYC completion and first transaction rate.
• Engagement: monthly active users counted on transactions, and stickiness in its weekly form.
• Retention: retention by week or month and activity-based churn.
• Monetisation: ARPU, LTV, CAC and payback period.

Funded account: an account with a first deposit, payment or balance. Many fintech teams treat this, not the sign-up, as the moment a user becomes a customer.

Which fintech onboarding steps lose the most users?

In most fintech funnels the biggest losses sit between sign-up and the first transaction: KYC document capture, review time and the first deposit. Measuring started, submitted and verified KYC separately, then deposit conversion by day 1, day 3 and day 7, shows which of those steps to fix.

1. AcquisitionCost per install, then per funnel step

   1CpiCost per install2CpaCost per action
2. →
   ActivationSign-up, verified, funded

   8ActActivation rate11KycKYC completion rate12FtrFirst transaction rate
3. →
   EngagementTransacting users, weekly or monthly

   14MauMonthly active users15StkDAU/MAU stickiness
4. →
   RetentionStill transacting after 30 and 90 days?

   22RetRetention rate23ChnChurn rate
5. →
   MonetisationRevenue per customer against what they cost

   25ArpuAverage revenue per user30LtvLifetime value3CacCustomer acquisition cost32PbPayback period

Deposit conversion: the share of a verified cohort that makes a first deposit within n days. It is cumulative, so the day 7 rate includes everyone who deposited on days 1 to 6.

How the fintech metrics connect

Each gate divides the users who reach the next, so the cost of a funded customer is CPI divided by every conversion rate in turn.

• Cost per sign-up = CPI ÷ install-to-sign-up rate.
• Cost per verified user = cost per sign-up ÷ KYC completion (of sign-ups).
• Cost per funded customer = cost per verified user ÷ first transaction rate. This is the media part of CAC.
• Payback = CAC ÷ monthly gross profit per customer, which in fintech often builds slowly from fees, interest or interchange.

The calculator runs the chain with example inputs. Replace them with your own to see which gate moves the cost of a funded customer most.

What to watch in each fintech metric

• KYC as a campaign goal. Campaigns optimised for sign-up can fill the top of the funnel with users who never verify. Once volumes allow, optimising towards KYC complete or first deposit usually aligns spend with customers.
• Deposit timing. Plot first transaction rate at day 1, day 3 and day 7 for each weekly cohort. A curve that keeps rising after day 3 says reminders work; a flat one says the decision is made on day 1.
• Weekly, not daily, activity. Investing, lending and insurance apps are not daily habits. Use weekly or monthly retention ranges and WAU/MAU rather than DAU/MAU.
• Churn without a cancel button. Most fintech churn is silence, not cancellation. Define activity churn as no transaction in 30 or 90 days and keep that window fixed.
• Revenue that arrives late. Interest and fees accrue over months, so early ROAS looks poor. Long-horizon, margin-based LTV is the fairer test of a channel.
• Long attribution windows. KYC review can take days, so first transactions can land after short attribution windows close. Check the window before blaming a channel.

Where fintech numbers go wrong

• Referral rewards counted as growth. Cash rewards lift referral share quickly, and attract reward hunters. Judge referral cohorts on funded accounts and retention, not installs.
• Sign-up as the denominator. KYC completion measured from sign-ups mixes motivation with form friction. Report it from KYC started as well.
• Benchmarks as targets. In Linkrunner's State of Mobile App Growth: India Startups 2026 report, the median fintech app turned about 21% of installs into sign-ups, and the median fintech CPI in that India report was about ₹21, with a wide spread between apps. Use your own week-on-week trend to set targets.

For how attribution tools differ on fintech needs such as long windows and post-KYC events, MMPCompares' guide for fintech and EdTech apps compares them.

Further reading

Linkrunner's Metrics that Matter: Fintech edition covers D7 retention by source, KYC funnels and profitability, and its list of critical fintech events to track sets out the events these formulas depend on.