The paper presents issues pertaining to the amount of planning fees (fees charged for a planning application) in the context of the decision by the Polish Constitutional Tribunal dated 9 February 2010, file symbol P 58/08. Authors discuss the principles of setting such fees before the aforementioned decision was issued, and the new fee calculation principles following the implementation of the Tribunal’s judgement. The Tribunal decision in question produced the change in the regulations of law concerning the calculation of planning fees, which up to that date caused many problems and difficulties, not only for the agencies responsible for setting and collecting the fees, but also for real estate evaluators and appraisers, who performed land valuations for the purpose of calculating planning fees.