The handling fee is reduced by 90% under the same conditions as for the international filing fee (see GL/PCT‑EPO A‑III, 8.1.2). This principle also applies to the supplementary search handling fee due under Rule 45bis.2.
Source: http://www.epo.org/law-practice/legal-texts/html/guidelinespct/e/a_iii_8_3.htm
Date retrieved: 17 May 2021