I Det forenede Kongerige skal Contingency Fund anvendes til at absorbere overforbrug eller ekstraudgifter som følge af nye foranstaltninger; denne fond er så stor, at det kun i undtagelsestilfælde er nødvendigt at tage ændringsbudgetter i anvendelse; denne praksis har den fordel, at det sandsynlige maksimale udgiftsniveau bestemmes med større sikkerhed fra starten, men en stram budgetdisciplin inden for regeringen er påkrævet, hvis det skal undgås, at reserverne opbruges for hurtigt.
In the United Kingdom, the contingency fund is intended to absorb overruns or extra spending resulting from new measures ; the size of this fund is such that amending budgets have to be used only in exceptional circumstances; this practice has the advantage of determining the probable maximum level of expenditure with greater certainty from the outset, but requires great budgetary discipline within government to avoid the rash use of the reserve.