The main aim of this research is to formulate a method of creating an accurate, personalised anthropomorphic phantom, retaining efficient production at a low cost. The project accomplishment consisted of selecting appropriate materials, designing and printing the phantom, which was afterwards used in radiotherapy plan verification based on dosimetric measurements. Finally, data collected with radiotherapy film was analysed with the use of the gamma index. Obtained results show that a phantom created with the proposed method provides an alternative for the water phantom in terms of practical application in the verification of a cancer patient's treatment plan. •PLA proved to be good material for mimicking a variety of soft tissues in terms of both cost and quality.•Proposed designing method may be used for both personalised phantom and bolus printing.•Described phantom may be customised for use of other radiation detectors apart from radiochromic film.