In Polish: WIBOR
This is the word you will see in bank documents.
Definition
WIBOR (Warsaw Interbank Offered Rate) is a benchmark rate showing the rate at which banks declare they are willing to lend złoty to each other for 1, 3 or 6 months. Polish mortgages most often use WIBOR 3M or 6M, and the variable interest rate is WIBOR plus the bank's margin. On 23 October 2026 WIBOR 3M stood at about 3.89%.
What it means for you
If you have a variable-rate mortgage based on WIBOR, your instalment goes up and down with this benchmark, usually every 3 or 6 months. From 1 January 2027 banks may not use WIBOR in new agreements, but existing loans continue without an annex. WIBOR 1M, 3M and 6M are to be published until 31 December 2036.
Full entry in Polish, with a worked example and sources Work out your instalment
Frequently asked questions
What is WIBOR 3M today?
According to the fixing of 23 October 2026, about 3.89%. The value changes every business day; current quotes are published by GPW Benchmark.
Is WIBOR being abolished?
From 1 January 2027 it may not be used in new agreements. WIBOR 1M, 3M and 6M will still be published until the end of 2036 for agreements signed earlier.
Do I have to switch my loan from WIBOR to POLSTR?
No. Your existing agreement continues. If the bank offers an annex, you can accept or refuse it. Compare the total interest rate before deciding.
Related terms
Definitions are simplified and reflect Polish law and bank practice as of October 2026. Where every word matters, the Act and your loan agreement decide. Figures in examples are indicative and are not a bank offer. The Polish version of each entry has worked examples and sources.
Other terms in “Interest rates and benchmarks”