Ƙididdigar kuɗi shine aikin cire ma'aunin kuɗin matsayinsa a matsayin kwangilar doka, yawanci ta hanyar gwamnati ko hukumomin kuɗi. Lokacin da aka lalatar da kuɗin kuɗi, ba za a iya amfani da shi azaman hanyar musanya don siyan kaya da ayyuka ko daidaita basussuka ba. Yawanci, ana yin demonetization ne don yaƙar jabu, hada-hadar kasuwancin baƙar fata, ko don hana ɓarna haraji. Hakanan ana iya yin hakan don haɓaka amfani da sabon kuɗi, ko kuma magance matsalolin hauhawar farashin kayayyaki a cikin tattalin arziƙi.