Interest rates in September 2026: will borrowers get some breathing room?

Following the MPC's July 2026 decision, experts are forecasting stabilization, indicating that real interest rate cuts may occur no sooner than the end of 2026. The Monetary Policy Council left the main reference rate at 5.75 percent, which ultimately closed speculation about summer monetary policy easing. For most borrowers, this means the necessity of continuing to finance debt at current high costs, which have been determining the condition of Polish households for months.

The July MPC meeting: why 5.75 percent remains the anchor

The decision of July 8, 2026, did not bring the expected breakthrough. The market expected a signal that the series of cuts from the turn of 2025 and 2026 would continue at a pace that would translate into real savings on mortgage installments. Instead, the MPC opted for a wait-and-see approach. Maintaining the reference rate at 5.75 percent is a signal to commercial banks that the cost of money in the economy remains high. From a borrower's perspective, such a decision is unambiguous: banks have no basis to revise margins or capital-interest amounts in repayment schedules in the coming weeks.

In practice, every MPC decision to take no action is information for the indebted that the period of high debt servicing costs is being extended. If we have a mortgage of 500,000 PLN with a 25-year repayment period, the current rate of 5.75 percent, assuming a bank margin of 2 percentage points, generates an installment that burdens the budget in a direct and rigid way. Every 0.25 percentage point rate cut would mean a reduction in the installment of about 80–100 PLN per month in such a scenario. On an annual scale, that is nearly a thousand zlotys that stays in one's pocket. The lack of a cut in July means that this money continues to feed the profits of the banking sector, not household savings.

Analysts point out that the MPC's strategy is based on observing inflation indicators, which in mid-2026 stopped falling at the pace we had become accustomed to in previous quarters. Maintaining 5.75 percent is an attempt to protect the economy from a resurgence of price pressure. For borrowers, however, this is a "freeze" in an unfavorable position. Since the Council did not decide to make a move in July, the chances for a September cut are dropping drastically. The money market currently prices in that any significant corrections to debt servicing costs will be pushed to the last quarter of the year.

Why autumn 2025 was a false harbinger

A comparison of the current situation to the events of November 2025 stirs up many emotions. At that time, the MPC decided to cut rates, which many observers interpreted as the beginning of a "highway to cheap credit." Data from November 5, 2025, indicated a second autumn quarter-point drop, which raised hopes for a quick return to levels from before the hike cycle. Reality, however, quickly verified this enthusiasm.

In retrospect, it is clear that those decisions were merely a technical correction, not a change in the long-term trend. Borrowers who counted on installments falling month by month after November 2025 felt disappointed as early as December. At that time, the media reported on the phenomenon of "rigid installments" – despite official NBP announcements, banks were not eager to instantly update variable interest rates. In many cases, due to the way reference rates such as WIBOR 3M or 6M are calculated, the effect of interest rate cuts reached the client with a delay of even three to six months.

This experience is crucial for assessing September 2026. Even if the MPC were to decide on a symbolic downward move in September, it does not mean an automatic "breathing room" in the household budget. The mechanism of translating the Council's decisions into the real cost of a loan is bound by bank regulations. Some borrowers may feel a drop in their installment only in 2027. Understanding this fact allows one to avoid the frustration that accompanied many people after the autumn decisions of 2025. Now we know that there is a time gap between the decision in the NBP meeting room and our wallet that cannot be jumped over.

Cost analysis: what we are really losing by waiting until the end of 2026

Waiting for the "optimal level" of interest rates, which economists mentioned in forecasts from the turn of 2025 and 2026, has its measurable price. For the average household with mortgage debt, every month of maintaining a 5.75 percent rate is an opportunity cost. If we compare this to a scenario in which rates would fall to 4.75 percent – which is often pointed out by analysts as a "neutral" level – the difference on an annual scale for a 500,000 PLN loan is nearly 4,000 PLN.

This is not a negligible amount. It is a sum that could be used to overpay the principal, which in the long term drastically reduces the total cost of the loan. The problem is that at current rates, most of the installment we pay every month is interest, not principal repayment. At a 5.75 percent rate, these proportions are heavily tilted to the borrower's disadvantage. Until the MPC decides to cut rates, so-called debt capitalization proceeds much slower than in low-interest conditions.

Skepticism toward quick cuts in September 2026 also stems from the behavior of commercial banks. These institutions, hedging against risk, maintain margins at levels that, combined with a high WIBOR, create a nominal interest rate often exceeding 7-8 percent (including the margin). The borrower is therefore in a "pincer": on one hand, the high reference rate set by the MPC, and on the other – high bank margins that do not react to any signals coming from the economy.

The WIBOR mechanism and Council decisions: why numbers lie

A common mistake is assuming that a drop in interest rates automatically means a drop in the installment by exactly the same percentage value. In Poland, most mortgages are based on the WIBOR rate. This is an indicator that theoretically should reflect the cost of obtaining money by banks on the interbank market. In practice, however, WIBOR reacts to market expectations regarding future MPC decisions.

If the market "prices in" that rates will remain unchanged in September 2026 – which recent analyses confirm – then the WIBOR rate will not fall, even if inflation indicators are falling slightly. This is precisely why in December 2025, despite the rate cut, some borrowers' installments did not budge. The market had already priced in this move, and at the moment of the MPC's announcement, there was no surprise that could affect reference rate quotes.

For a borrower, this means that following NBP announcements is only half the battle. The other half is observing WIBOR 3M or 6M rate quotes. If these indicators do not show a downward trend, even the most optimistic announcements by politicians or Council members will not bring a real change. In September 2026, it will therefore be crucial whether the financial market starts to believe in the cuts predicted for the end of the year. If so, WIBOR will start to fall before the official MPC decision. If not, we will be doomed to further cost stagnation.

September 2026 perspective: scenarios for the borrower

Entering September 2026, we must accept the fact that monetary policy in Poland has become a "hostage" to the long-term fight against inflation. The MPC, led by decision-makers who remember the painful effects of the overly rapid easing of 2025, will not take a risk that could be perceived as premature. September will be a month in which the Council will analyze data from the entire holiday period. If this data shows that consumption is not growing in an uncontrolled manner, the door to a cut in the fourth quarter will be left ajar.

Does this mean that borrowers should prepare for "survival"? Yes. The strategy for managing the household budget in the coming months should be based on the assumption that installments will not fall. Anyone who includes a sudden drop in loan costs before the end of the year in their financial plans is taking a risk. A safer approach is to verify the possibility of overpaying the loan if we have any free funds. By overpaying the principal when rates are high, we effectively reduce the base for calculating interest for the future, which is a much more effective method of fighting costs than waiting for MPC moves.

It is also worth remembering that the macroeconomic situation in Poland is correlated with the external environment. The European Central Bank and the American FED are also showing great caution. The Polish economy, being part of the global financial system, cannot afford to completely cut itself off from these trends. If global markets maintain high rates, the MPC will have limited room for maneuver, even if the situation inside the country improves. This is another argument for not expecting sharp cuts in September.

Inflation as the main brake on cuts

One cannot talk about interest rates in 2026 while ignoring the inflation indicator. It is the "judge" that decides on the Council's moves. In November 2025, when inflation showed temporary signs of slowing down, the MPC felt room for action. However, as subsequent months showed, the fight against food and energy prices proved to be more arduous.

In September 2026, the MPC will look at so-called core inflation, i.e., the indicator excluding energy and food prices. It shows whether price increases are permanent. If core inflation remains above the NBP target, the Council will have no argument to lower the 5.75 percent rate. Borrowers must therefore follow not only MPC announcements but, above all, data published by the Central Statistical Office (GUS). If in August and September this data is "disturbing" from the perspective of the inflation target, we can be sure that the September 2026 decision will be a repeat of July – that is, maintaining the status quo.

For a person paying off a loan, this is a difficult lesson in patience. The economy needs time to stabilize, and borrowers are the group that bears the greatest costs in this process. It is worth remembering, however, that periods of high interest rates are historically stages that eventually give way to growth cycles. The key is to survive this stage without losing financial liquidity.

What awaits the market in the fourth quarter of 2026

The end of 2026 appears to be the only realistic date when we can expect changes. If inflation in the third quarter shows a downward trend, the MPC may decide to make a move in November or December. It will likely be a cautious move, of 0.25 percentage points. It will not drastically change the situation of any borrower, but it will be a signal of a trend change.

It is worth preparing for the fact that even if such a cut occurs, banks will not be eager to lower mortgage interest rates to the same extent. A common practice is "hiding" part of the cuts in margins to compensate for lower interest income. A borrower who counts on their installment falling by 100 PLN in December 2026 may be disappointed when it turns out the drop is only 30-40 PLN.

From the perspective of the entire year 2026, it was a time of stabilization, not relief. For many households, this means that the household budget had to be permanently rebuilt to adapt to higher costs of living and debt servicing. The fact that interest rates remain at a high level has forced many Poles to give up other consumer spending. This is the price we pay for a return to monetary stability. It is not a comfortable situation, but from a macroeconomic point of view, it is necessary to avoid a scenario in which inflation spirals out of control, destroying the value of savings of all citizens, not just borrowers.

Conclusions for every borrower

To summarize the current situation: September 2026 will not bring us "breathing room." The Monetary Policy Council remains a hostage to macroeconomic data, and these – despite some improvement – do not yet give the green light for aggressive cutting of loan costs. Instead of counting on a quick drop in installments, one should focus on optimizing one's own finances.

For those who have the possibility, overpaying the loan is currently the most sensible investment. The profit from overpayment is guaranteed and amounts to the interest rate of the loan (which is currently often over 7-8 percent per year). No safe deposit or treasury bond currently offers such a certain and high rate of return. This is the best way to "punish" the bank for high installments and at the same time protect oneself against the risk that rates will remain high longer than current forecasts predict.

Let us not be misled by press headlines that promise a breakthrough after every Council meeting. The financial mechanism is slow and lacks empathy for the needs of the average borrower. As long as the 5.75 percent level is maintained, we must count on costs that are a derivative of decisions made in response to inflation from 2025-2026. Let us be prepared for stabilization that will last at least until the end of the current year. Any other scenario would require the Monetary Policy Council to change its approach, for which there is currently no hard evidence in NBP announcements.

Questions and answers

Will interest rates fall in September 2026?

Taking into account the MPC's July decision to maintain the reference rate at 5.75 percent and current macroeconomic forecasts, analysts point to a continuation of interest rate stabilization until the end of 2026. The probability of a downward move in September is assessed as low.

Why haven't my loan installments fallen, even though inflation is lower than in 2025?

The mechanism for transferring interest rate changes to loan installments is not immediate. It is influenced by the structure of the loan agreement, reference rate quotes (WIBOR), and bank policies regarding margins. Experiences from the turn of 2025 and 2026 show that banks often delay corrections, and the financial market prices in cuts well in advance.

When is the optimal interest rate level expected to be reached?

According to expert opinions that appeared as early as November 2025 and remain current in mid-2026, the optimal interest rate level in Poland has a chance to be reached no sooner than the end of 2026. Any significant cuts are currently being postponed to the last quarter of the year.

Is it worth overpaying the loan at the current rate level?

Yes, overpaying a loan during a period of high interest rates is beneficial because it allows for faster reduction of the debt principal, which in the long term significantly lowers the total cost of the loan. With a loan interest rate of around 7-8 percent, the profit from overpayment exceeds the profitability of most safe savings products available on the market.

Will September 2026 bring any changes in bank offers?

Unless the MPC surprises the market, banks have no reason to significantly revise their offers. One should expect a continuation of the current strategy, where margins remain at a stable, high level, and loan offers do not undergo significant changes to the client's benefit.

Sources

Article prepared by the Wiadomości PRO editorial team with the support of artificial intelligence. Facts are derived from the sources listed above.