Ukuhweba okukhethwa kukho kanambambili kuyithuluzi lezezimali elinikeza indlela eqondile yokuqagela ngokuhamba kwentengo yezimpahla ezihlukahlukene. Ivumela abathengisi ukuthi babikezele ukuthi intengo yempahla izokhuphuka noma yehle phakathi nesikhathi esishiwo. Lo mhlahlandlela obanzi uhlose ukuhlinzeka ngesinyathelo ngesinyathelo sabaqalayo abanentshisekelo yokubhalisa nokuhweba okukhethwa kukho kanambambili.