The NBP's own March 2026 projection round penciled in a path above the 3.5% upper band of the inflation target through the end of 2026, following the expiry of the fuel cap, with a return to the 2.5% point target only in mid-2027. A 4.0% flash print does not break that framework on its own. It sits inside the band the March round already flagged as elevated. But the March round predates the June fuel-cap expiry and the wire's own July projection preview, which the NBP itself is expected to show as materially higher through mid-2027. A 4.0% reading arriving before that revision is published gives the Council's October meeting less room to treat the overshoot as transitory.#
A 4.0% inflation print landing eight days before a rate decision does not by itself force the Council's hand, but it removes the easiest argument for extending the cut cycle that has already taken the reference rate from wherever it started to 3.75% as of 5 March 2026.#
Warsaw's banks are pricing something closer to the opposite story. WIG-BANKI fell 0.92% on the 29 September 2026 session and is down 0.74% over the five sessions since 23 September, a sector move that keeps running even as the CPI print firms. PKO BP, the largest listed Polish bank, trades at a price-to-book of 2.76 with a 5% dividend yield. Pekao trades cheaper, at a price-to-book of 2.21 with a 7.2% yield. Neither multiple suggests a sector bracing for inflation to force rates higher rather than lower. If anything the valuations still assume the cutting cycle has further to run, the same tension the desk flagged on 21 September 2026 when the 10-year POLGB yield's spread over six-month WIBOR hit a record 2.66 percentage points.#
The złoty, for its part, is not treating the print as a Polish story at all. EUR/PLN is essentially flat intraday, down 0.12% so far on 30 September 2026, while USD/PLN carries the larger move, up 1.15% over five sessions and 3.16% over the past month, against an EUR/USD leg down 2.2% over the same month. That split matches the 23 September 2026 reading that the złoty's moves against the euro have largely tracked the dollar rather than a domestic rate story. A 4.0% CPI print has not, yet, moved EUR/PLN off that pattern.#
What breaks this read is straightforward. If the Council's 7 October 2026 rate decision or the communication around it signals a shift away from the mid-2027 return-to-target framing that the March projection established, that is evidence the inflation print is doing more to Polish rate expectations than the currency or the March projection framework currently assume. Until then, the wedge between a firming CPI print, a bond market already pricing less room to cut, and bank equities still discounting easier policy is the thing to watch into the decision.#
