CASE, ZINSKONZEPT · FINANCE · 2026
+138% inquiries with live rate calculators.
+138% inquiries after Next.js relaunch with live calculators
zinskonzept.de
HOMEPAGE · LIVE
MOBILE VIEW
THE CALCULATORS IN DETAIL · DAILY RATE DATA VIA API
zinskonzept.de/rechner/konditionsrechner
Konditionsrechner, live rates & fixed-interest periods
zinskonzept.de/rechner/budgetrechner
Budgetrechner, affordable purchase price in real time
zinskonzept.de/rechner/miete-kauf-vergleich
Miete/Kauf-Vergleich, is buying worth it?
THE CHALLENGE
Zinskonzept brokers mortgage financing with over 600 bank partners, but the old WordPress site conveyed none of it: sluggish load times, dated design, zero interaction. Anyone wanting conditions had to call. Many didn't.
OUR SOLUTION
A complete relaunch in Next.js with new design and conversion structure: four financing calculators fed by daily interest-rate data via API, conditions, budget, rent-vs-buy, closing costs, turn visitors into qualified inquiries. We also run their social channels with a new content concept.
THE RESULTS
+138%+138%
more financing inquiries
1.2s1.2s
load time, previously 4.6 seconds
40%40%
of visitors start a calculator
Zinskonzept GmbH
Mortgage financing, Karlsruhe
CLIENT FEEDBACK
“The new website works like an additional advisor: the calculators answer the first question. We take over from the second.”
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