Bookmakers ba sa ba da farashin gida. Kowane farashin ana jawo kaɗan kaɗan daga ainihin daraja, ta haka, duk wace sakamako ta zo, littafi ya adana kashi. Idan ka tara yiwuwar lissafi na kowane sakamako, abin da ya fito sama da 100% shine margin - ana kira shi overround, juice ko vig. Margin na sabuwar wasa (football match-result) zai yi kusan 2% a bookmakers masu zani zuwa 7%+ a waɗanda ba sa da kaifi.
Margin shine kila kusan da bettor ya gida: idan ka baji shakatawa, ka lose margin a cikin lokaci. Wannan yana da matakala gida biyu. Na farko, gwada farashin a cikin bookmakers daban-daban ya yi muhimmi sosai - mafi kyawun farashin da ake samu sau da yawa ya kawo da waje akaba kauri da margin. Na biyu, samu da shuni shine wuce jiya margin da kuma wani abu, wanda aka saba shi, ainihin kauri na dogon lokaci kaɗa kuma kaɗan.
Kasuwa mai sakamako biyu da farashin 1.91 / 1.91: yiwuwar lissafi 52.4% + 52.4% = 104.8%, margin 4.8%. Farashin gida don ainihin 50/50 zai zama 2.00 / 2.00.