Mortgage Interest Rates in Poland in 2026: Average Rate, WIBOR, Margin, Fixed or Variable
Author: Tacjana MasiukiewiczMortgages~6 min read
The average interest rate on new residential loans in zloty in Poland in July 2026 was 6.07% (NBP data for new contracts, excluding renegotiated ones). That is a market average: your own rate consists of a reference rate (for existing loans most often WIBOR) plus the bank's margin or, for a fixed rate, of the terms for the chosen period. Below we explain what goes into the rate, what the numbers are today and what one percentage point costs in a monthly instalment.
In brief
- Average rate on new residential loans in PLN in July 2026: 6.07% (NBP MIR, new contracts excluding renegotiated ones).
- According to the NBP (new and renegotiated contracts, July 2026): variable rate 5.69%, rate fixed for over a year 6.10%, overall 6.00%.
- Loan rate = reference rate + bank margin. The margin is written into the contract and stays the same for the whole term; the reference rate changes.
- Benchmarks on 25 September 2026 (GPW Benchmark): WIBOR 3M 3.86%, WIBOR 6M 3.90%. The NBP reference rate has been 3.75% since 5 March 2026 (unchanged at the Monetary Policy Council meeting of 9 September 2026).
- On a PLN 500,000 loan over 30 years, every 1 percentage point of interest is roughly PLN 310–340 per month.
What a mortgage interest rate consists of
With a variable rate, the interest is the reference rate plus a margin. For most existing loans the reference rate is WIBOR 3M or 6M, updated every 3 or 6 months. The margin is the bank's mark-up. It depends on the bank, your down payment (LTV), your profile and whether you take the bank's additional products. The Mortgage Act requires the contract for a variable rate to set out exactly this method of calculation (art. 29(2)).
With a fixed rate, the bank sets a single rate for an agreed period. In Poland this is almost always a "periodically fixed" rate: under KNF Recommendation S the fixed period must last at least 5 years, after which the bank agrees a new rate with you or moves you to a variable rate under the formula in the contract. According to AMRON data quoted by the NBP, fixed-rate loans made up about 64% of new contracts in Q1 2026.
For new loans the reference rate is changing: the market is moving from WIBOR to POLSTR. The working group on benchmark reform recommends POLSTR 1M for new variable-rate loans, and the KNF expects banks not to sign new contracts based on WIBOR from 1 January 2027. Details are in WIBOR, WIRON and POLSTR explained.
Rates according to the NBP: variable and fixed
| Residential loans in PLN | May 2026 | June 2026 | July 2026 |
|---|---|---|---|
| Variable rate (and fixed up to 3 months) | 5.69% | 5.73% | 5.69% |
| Rate fixed for over 1 year | 6.06% | 6.13% | 6.10% |
| Overall | 5.97% | 6.02% | 6.00% |
A fixed rate is currently about 0.4 percentage points more expensive than a variable one. That is the "premium" for a predictable instalment for 5–10 years. Whether it is worth paying depends on the cushion in your budget; scenarios with instalments are in fixed or variable mortgage rate in Poland.
What a percentage point costs: instalment on a PLN 500,000 loan
| Interest rate | Monthly instalment (30 years) | Total interest over 30 years |
|---|---|---|
| 5% | about PLN 2,684 | about PLN 466,000 |
| 6% | about PLN 2,998 | about PLN 579,000 |
| 7% | about PLN 3,327 | about PLN 698,000 |
| 8% | about PLN 3,669 | about PLN 821,000 |
For comparison, at the average rate of 6.07% the instalment on such a loan is about PLN 3,020. Other amounts and terms are in mortgage instalment tables PLN 500,000–800,000.
The rate is not the whole cost of the loan
A low rate does not always mean a cheap loan: the bank may offset it with a fee, compulsory insurance or conditions on your account and incoming payments. Compare the APRC (the annual percentage rate of charge, RRSO in Polish) and the ESIS information forms that the bank must give you before you apply. How to read them is shown in which bank for a mortgage in Poland.
Also remember that when assessing creditworthiness the bank adds the Recommendation S buffer to the rate, currently 2.5 percentage points for a variable rate. The "test" instalment is therefore always higher than the real one; see borrowing capacity in Poland.
Want to compare real bank offers instead of averages? Book a consultation with a mortgage expert. We will compare offers from several banks for your amount and term. The consultation and the selection of offers are free of charge.
Frequently asked questions
What is the mortgage interest rate in Poland today?
The average on new residential loans in zloty is 6.07% (NBP, July 2026). Your offer depends on the bank, the down payment, the type of rate and any products you take with the loan.
Which is more expensive, a fixed or a variable rate?
According to the NBP, in July 2026 the rate fixed for over a year (6.10%) was about 0.4 percentage points higher than the variable rate (5.69%). Which turns out cheaper will only show in the level of rates over the coming years.
What is WIBOR and how does it affect my rate?
WIBOR is an interbank rate (1, 3 or 6 months) on which the variable rate of most existing loans depends: the reference rate plus the bank's margin. For new contracts the market is moving to POLSTR.
Does the margin change during the loan?
As a rule, no: the margin is written into the contract and stays constant, while the reference rate changes. The margin can, however, go up if you stop meeting the conditions for which the bank gave you a discount (for example those on payments into your account).
Can I influence the rate myself?
Yes: the size of your down payment, the loan term, the type of rate and comparing several banks on ESIS forms all affect the cost. Once you have a loan, the rate can be lowered through mortgage refinancing.
Summary
A mortgage rate in Poland is a reference rate plus a margin, or a fixed rate for 5 years or more. The average level in summer 2026 is about 6% (6.07% for new contracts), and the instalment is influenced most by the type of rate and the loan term. Compare not the rate alone but the APRC and ESIS for identical parameters. Once you know the amount, we can also help with buying a flat from a developer, in most cases without a commission for you, because the developer usually pays our fee.
Position as of 4 October 2026; WIBOR values are from the fixing of 25 September 2026, NBP statistics are for July 2026. The calculations are indicative and are neither a bank offer nor legal advice.
Sources
- NBP, interest rate statistics (MIR): average rates on new residential loans in PLN, May–July 2026.
- NBP, basic interest rates: reference rate 3.75% since 5 March 2026.
- GPW Benchmark: WIBOR and POLSTR values, fixing of 25 September 2026.
- KNF, Recommendation S: minimum fixed-rate period, interest rate buffer.
- Mortgage Act (Ustawa o kredycie hipotecznym), consolidated text (art. 29).
- KNF and benchmark reform working group statements of 18 and 20 May and 30 June 2026; details in WIBOR, WIRON and POLSTR explained.
