Allegro forecast its adjusted earnings before interest, tax, depreciation and amortization (EBITDA) will increase 20-23% in its key Polish market.

Gross merchandise value (GMV), an industry metric used to measure transaction volumes, is expected to rise 13%-14%, while revenue is likely to increase 20%-22%, the company said.

Allegro is keeping costs down as it integrates the Mall business it bought last year and adapts to consumers spending less.

The company's core earnings jumped 41.2% to 708 million zlotys ($163.70 million) in the fourth quarter in Poland, topping average analysts' expectations of 692 million zlotys in a company-compiled consensus. Including Mall group, which it acquired last year, the figure rose 33.3%.

($1 = 4.3250 zlotys)

(Reporting by Anna Pruchnicka; Editing by Matt Scuffham)