U.S. dollar, euro and Ukrainian hryvnia banknotes are seen in this picture illustration taken in Kiev, Ukraine, October 31, 2016.
U.S. dollar, euro and Ukrainian hryvnia banknotes are seen in this picture illustration taken in Kiev, Ukraine, October 31, 2016. Reuters / Valentyn Ogirenko

Ukraine's central bank kept its main interest rate unchanged at a seven-year-high of 25% on Thursday and raised its 2022 inflation forecast to more than 30%.

Devastated by the war with Russia, Ukraine's economy fell by around 40% year on year in the second quarter of this year, the central bank said, opening up the possibility it could keep the key rate at 25% until the second quarter of 2024.

"The baseline scenario of the macroeconomic forecast envisages that the key policy rate will be maintained at 25% at least until Q2 2024," the National Bank of Ukraine (NBU) said in a statement.

Ukraine's economy could shrink by a third in 2022 before recovering next year, the central bank said. It is expected to grow between 5% and 6% in 2023 and 2024, it said.

The rate meeting was held hours after the central bank abruptly devalued the hryvnia, the national currency, by 25% against the U.S. dollar to help cope with the impact of the war.

NBU Governor Kyrylo Shevchenko told reporters the devaluation would add 2-3 percentage points to inflation, a projection it took into account for its new inflation forecast.

Another senior central official said conditions were not ripe for a return to a floating exchange rate for the hryvnia.

Shevchenko said that a new International Monetary Fund programme was expected next year.

The central bank said that Ukraine's cooperation with international partners would be a key factor in supporting the economy and contributing to its recovery.

A long war with Russia, which invaded on Feb. 24, was the key risk to its forecast, the central bank said.