WIBOR is a term that has frequently come up over the years in connection with mortgages and other variable-rate loans. It is particularly important to borrowers because a change in the base rate can directly affect the amount of their monthly payment.
What is WIBOR?
WIBOR (Warsaw Interbank Offered Rate) is an index related to interest rates on the interbank market. In the case of loans, its significance lies primarily in the fact that it can be one of the components of the loan’s interest rate.
Simply put, the interest rate on a variable-rate loan can be expressed as:
loan interest rate = WIBOR + bank margin
For example, if a loan agreement specifies a 3-month WIBOR of 5% and a bank margin of 2%, the nominal interest rate is 7%.
It is important to remember, however, that the specific rules for determining the interest rate depend on the loan agreement.
Why is WIBOR important to borrowers?
If the loan’s interest rate is linked to the WIBOR rate, a change in that rate may result in a change in the installment amount.
Example:
Suppose a borrower has the following interest rate:
- WIBOR: 5.00%
- bank margin: 2.00%
- loan interest rate: 7.00%
If WIBOR rises to 6.00%, and the margin remains unchanged, the interest rate will rise to 8.00%. As a result, the interest portion of the installment may increase.
Conversely, a decrease in the base rate may result in a lower interest rate and a lower installment. The National Bank of Poland notes that changes in interest rates affect loan interest rates, and in the case of variable-rate loans, changes in market rates may affect the amount of the installments. (National Bank of Poland)
WIBOR vs. NBP Interest Rates
WIBOR is not the same as the National Bank of Poland’s interest rate. However, the two concepts are related. Decisions regarding interest rates are made by the Monetary Policy Council. Changes in NBP rates affect financing conditions in the economy and, consequently, may also influence the level of market interest rates. For this reason, the MPC’s decisions are closely monitored by people with variable-rate loans.
WIBOR 1M, 3M, and 6M—what's the difference?
With loans, you’ll encounter various periods for which a base rate is specified, including WIBOR 1M, 3M, and 6M.
The letter “M” stands for month. The number indicates the period to which the rate applies.
In practice, it is important not only to know which index is specified in the contract, but also how often the loan’s interest rate is updated. The specific terms should be set forth directly in the loan agreement.
Does a drop in WIBOR always mean a lower payment?
It is not always the case that an installment will automatically change the exact moment WIBOR changes. It all depends on the terms of the specific loan, including how and how often the interest rate is updated. The installment amount is also affected by the outstanding principal, the loan term, and the type of installments. Therefore, when analyzing the impact of WIBOR changes on your own loan, it is worth checking the provisions of the loan agreement first and foremost.
WIBOR is not the total cost of a loan
- the interest rate,
- the bank’s margin,
- a commission,
- insurance,
- and other fees specified in the contract.
The National Bank of Poland (NBP) notes that the cost of a loan depends not only on the base rate, but also on the margin and other financing-related costs. (zloteszkoly.nbp.pl) Therefore, when comparing loan offers, one should not focus solely on the WIBOR rate itself.
What should you check before signing a contract?
- the bank’s margin,
- the type of base rate used,
- the rules for adjusting the interest rate,
- the total cost of the loan,
- the installment amount at different interest rate levels,
- the possibility of future interest rate changes.
It is particularly important to verify whether your household budget will allow you to repay the loan even if interest rates rise. The National Bank of Poland (NBP) notes that with a variable-rate loan, the monthly payment amount may change significantly over the long term. (National Bank of Poland)
WIBOR – Key Information at a Glance
WIBOR is an index linked to the interbank market and may be a component of a loan’s interest rate.
In the case of a variable-rate loan, the formula can be simplified as follows:
WIBOR + bank margin = loan interest rate
An increase in the base rate may result in higher monthly payments, while a decrease may lead to a lower interest rate. The ultimate impact, however, depends on the terms of the specific loan agreement.
Therefore, before taking out a loan, it’s a good idea not only to check the current interest rate but also to analyze how changes in interest rates might affect your monthly budget.
Summary: WIBOR is an important factor that has had a direct impact on many borrowers in Poland over the years. Understanding its role allows you to better assess the risks associated with variable interest rates and make more informed comparisons of loan offers.
