Deep linking for fintech apps
Fintech campaigns promote something specific: a loan at a stated rate, a card, a savings product, an investment plan. The onboarding that follows is already the longest in mobile. Deep linking removes one avoidable step from it — the user opens the app on the product they tapped, instead of a generic signup screen that asks them to find it again.
Why context loss costs more in fintech
Every category loses users at the install gap. Fintech loses more of them, for two structural reasons. Intent is narrow — someone who tapped a specific rate wants that product, not a product catalogue. And the path to conversion is long: identity documents, proof of address, a selfie check, sometimes a manual review. Adding a search step in front of a flow that already asks for that much is the wrong place to add friction.
- Product continuity: the offer, rate, or plan the user tapped is what opens after install.
- Partner attribution: each comparison site, affiliate, and distribution partner gets its own link and its own record of resulting account opens.
- Funnel visibility: where users abandon between first open and an approved, funded account.
Use cases for deep linking in fintech
Product and rate campaigns
An ad for a specific loan, card, or savings product links to a deep link that opens that product in the app, or sends new users through the app store and into the same product via deferred deep linking. The campaign promise and the first screen match.
Comparison sites and affiliate partners
When you pay per account opened, each partner needs its own link so the resulting install and downstream events carry that partner's identifier. That produces a per-partner record you can reconcile against their reporting, rather than a pool of installs you have to allocate after the fact.
Referrals without a code
Code-entry referral programmes lose credit whenever the recipient forgets the code or never finds the field. A referral link carries the referrer reference through the install, so the attribution does not depend on the new user remembering to type something.
Resuming an interrupted application
KYC flows are frequently abandoned mid-way and finished later. A push or email that opens the app at the step the user left — rather than the home screen — is the difference between resuming and restarting.
Web-to-app handoff: what to pass, and what not to
Many fintech users start an application on the web and are asked to install the app to complete verification. That handoff is worth getting right, and it is also the place where teams most often build something unsafe.
Do not pass a session or authentication token through the link. URLs end up in browser history, server logs, referrer headers, screenshots, and analytics exports. RFC 6750 specifically discourages transporting bearer credentials in a URI for exactly this reason. An application that opens “already authenticated” from a link is a credential leak waiting to be found.
Pass a short-lived, single-use handoff reference instead. The app exchanges it server-side for a real session after the user re-authenticates, and the link itself carries only what the destination screen needs to render — a product ID, an application reference, a step number. Validate every incoming parameter against an allowlist, and never let a link parameter alone authorise access to an account.
Measure approved accounts, not installs
An install is a weak signal in fintech because the drop-off happens after it. Instrument the funnel that actually reflects value — first open, signup started, KYC submitted, KYC approved, account funded, first transaction — and judge campaigns on cost per approved account. A channel with a low cost per install and poor KYC completion is more expensive than it looks.
Attribution records tell you which campaign or partner preceded an account open. Treat them as measurement data for reconciliation and optimisation, not as a legally attested audit trail; where a partner agreement or regulator requires evidentiary records, that is a separate system with its own retention and integrity requirements.
Summary
Deep linking in fintech ties each campaign to the product it advertised and keeps that product visible through install, onboarding, and KYC. Pair it with deferred deep linking for new users, keep credentials out of URLs, and measure to the approved account rather than the install. If you want the basics first, see what is deep linking; for the measurement side, see app attribution platform.
Deeplinkly provides deep linking, deferred deep linking, and install attribution for iOS, Android, Flutter, React Native, and Web.
Start free →Frequently asked questions
- Why do fintech apps need deep linking?
- A fintech campaign usually promotes one specific thing — a loan product, a card, an investment plan, a rate. Without deep linking the user installs and lands on a generic signup screen with no reference to what they tapped, so they have to find it again before onboarding even starts. Deep linking routes them to that product, which matters more in fintech than most categories because the onboarding that follows is already long.
- Can a deep link carry product context through a new install?
- Yes, with deferred deep linking. The product or offer the user tapped is preserved through the App Store or Play Store install and delivered on first open. Carry only what the destination screen needs to render — a product ID or offer code — and resolve everything else server-side after the user authenticates.
- Should a deep link carry authentication or session tokens?
- No. URLs end up in browser history, server logs, referrer headers, and analytics exports, and RFC 6750 specifically discourages transporting bearer credentials in a URI. If a user starts onboarding on the web and continues in the app, pass a short-lived, single-use, server-validated handoff reference — not a session token, and never a credential.
- How does deep linking help attribute regulated partner traffic?
- When you pay a comparison site, affiliate, or distribution partner per account opened, each partner needs its own link so the resulting install and downstream events carry that partner's identifier. That gives you a per-partner record of which accounts came from where, which is what partner reconciliation requires. Treat it as a measurement record, not a legally attested audit trail.
- What in-app events should a fintech app measure after the install?
- Install alone tells you very little in fintech, because the drop-off happens during onboarding. Measure the funnel: first open, signup started, KYC step completed, KYC approved, account funded, first transaction. Cost per approved account is the number that should drive budget, not cost per install.