margin of safety
noun[C]
ukus(alsosafety margin)something thatprotectssomeone by making itpossiblefor there to be anamountofriskor anumberofmistakeswithout having a verydamagingeffect:
Ourenvironmentallawsaredesignedto makesurethatpeopleareprotectedto anadequatemarginofsafety.
Amixofstocksandbondscanprovideaneededmarginofsafetywhen there's astockmarketsell-off.
ACCOUNTING
thedifferencebetween a company’ssalesand what it mustsellinordertobreakeven(= make neither aprofitnoraloss)