The Bundesbank has published the “Bezugszins” (10-year zero-coupon euro swap rate) for January 2026. It amounts to 2.894 %.
The “Referenzzins” for the calculation of the “Zinszusatzreserve (ZZR)” as of 31.12.2025 amounts to 1.57 %.
Assuming that the “Bezugszins” remains constant, the “Referenzzins” as at 31.12.2026 would be 1.57 %.