Bank Margin
The bank's own fixed profit component of a mortgage loan's interest rate, added on top of the variable reference rate and, unlike the reference rate, fixed for the life of the loan under the original agreement.
Applies to Poland.
Definition
The bank margin (marża banku) is one of the two components that make up a variable mortgage interest rate — the other being a market reference rate such as WIBOR. While the reference rate moves with market conditions and monetary policy, the margin is set individually by the lending bank at the time the loan is granted and, absent a separate agreement, stays fixed for the entire loan term.
Banks set the margin based on their own risk assessment of the specific loan: a lower loan-to-value ratio, a strong creditworthiness profile, and taking out additional products with the same bank (such as a linked bank account or life insurance) typically qualify a borrower for a lower margin, while a higher-LTV loan or a thinner credit history usually results in a higher one. Some banks also offer a temporarily reduced margin during the period covered by bridge insurance, which then reverts to the standard level once the mortgage is formally entered in the land and mortgage register.
Because the margin is fixed while the reference rate fluctuates, it is the main lever borrowers can negotiate or shop around for when comparing mortgage offers — two loans with the same reference rate can still carry very different total interest costs depending on the margin each bank applies.
Examples
A borrower with an 80% LTV loan is offered a 2.0 percentage point margin, while a borrower with a 60% LTV loan at the same bank is offered 1.7 percentage points due to the lower risk.
A bank offers a discounted margin to a borrower who opens a personal account and takes out a linked life insurance policy with the same institution.
A borrower compares two mortgage offers with identical reference rates but different margins, and picks the one with the lower margin since it results in a lower monthly installment over the life of the loan.
How this affects buying and selling
Because the margin, unlike the reference rate, is within a bank's control and open to negotiation, buyers benefit from comparing margin offers across several banks rather than accepting the first one — a difference of even half a percentage point compounds significantly over a 25-to-30-year loan term. Borrowers should also confirm in writing whether any promotional margin discount is permanent or conditional on keeping other products with the bank, since losing those products can trigger a margin increase later.
