Ɗaukar aiki an san shi da kasancewar yarjejeniya kan amfani don diyya. Wannan yarjejeniya tana zuwa ne a nau'i uku:

Hiring is known as being a contract upon benefit for compensation. This contract comes in three types:

Na farko: Nau'in mu'amala da ke kan amfanin abubuwa kamar hayar gidaje, dabbobi, motoci da makamantansu. Kwangilar tana gudana ne a kan amfanin abin.

Firstly: A type coming upon the benefits of things like hiring houses, animals, vehicles and the like. The contract is performed upon the benefit of the thing.

Na biyu: Wani nau'i ne da ya shafi amfanin aiki kamar zane, injiniya, gini da makamantansu. Abin da ake yin kwangila a kansa shi ne amfanin aikin.

Secondly: A type coming upon the benefits of work like painting, engineering, building and the like. What is contracted upon is the benefit of the work.

Na uku: Irin da ke shafar amfanin mutane kamar bayi, ma'aikata da makamantansu. Abin da ake yin kwangila a kansa shi ne amfanin aikin mutumin.

Thirdly: A type coming upon the benefits of persons like servants, labourers and the like. What is contracted upon is the benefit of the effort of the person.

A cikin waɗannan nau'o'i uku, abin da aka yi kwangila a kansa shi ne amfani a cikin kowannensu. Don haka abin da aka yi kwangila a kansa shi ne amfani. Kuɗin da aka ambata shi ne musanya ga wannan amfani. Saboda haka, tushen da ake kimanta ijara a kansa shi ne amfanin da wannan abu ko wannan aiki ko wannan mutum yake bayarwa. Ba ya dangantaka da darajar abin da ake aiki a kansa ko farashinsa, ko da yawan aikin ma'aikaci dangane da mai aiki, haka nan ba a biyan bukatun ma'aikaci. Don haka ba ya shiga cikin kimanta ijara ɗaga matsayin rayuwa ko rage shi. Ba ya halatta a mayar da kimanta ijara zuwa darajar abu ko farashinsa, ko yawan aikin ma'aikaci, ko biyan bukatunsa; kuma ɗaga matsayin rayuwa ko rage shi ba ya shiga cikin kimantawarsa. Kimantawarta tana komawa ga abu ɗaya kawai, wato amfani, tun da amfani ne bisa amfani don diyya. Ana kimanta ijara gwargwadon ma'aunin amfanin da aka yi kwangilar haya a kansa. Idan an sami saɓani game da adadin ijara, ba a kimanta ta da shaida da hujja, domin shaida ba ta da wani matsayi a cikin haka, tun da ba ya buƙatar tabbatar da ijara. Maimakon haka, sanin adadinta da kimantawarta yana faruwa ne ta hanyar kimanta ƙwararru biyu a kan amfanin da ake yi, da ƙwararru biyu a kimanta diyyarsa.

In these three types, what was contracted upon was the benefit in each one of them. So the thing upon which the contract occurred is the benefit. The money mentioned is the exchange for this benefit. Hence the basis upon which estimating the wage is based is the benefit given by this thing or this work or that person. It is not in relation to the value of the thing worked upon or its price nor his productivity in relation to the employee just as is not paying for the needs of the employee. Thus there does not enter the elevation of the living standard, or its lowering, in estimating it. It is not valid to return estimating the wage to the value of the thing or its price or the worker’s productivity or fulfilment of his needs; nor does raising or lowering the living standard enter into its estimation. Its estimation returns to only one thing which is the benefit since it is a benefit upon benefit for compensation. The wage is estimated according to the measure of benefit upon which the hiring contract occurred. During difference (of opinion) over the amount of wage, it is not estimated by evidence and proof as there is no role for evidence therein since it does not require proving the wage. Rather, knowing its amount and its estimation is by the estimation of two experts in the benefit over which the benefit occurs, and two experts in the estimation of its compensation.

Wannan yana da alaƙa da bangaren tushen albashi, ko kuma a wata ma'ana, ma'aunin da ake kimanta albashi a kansa. Game da bangaren bambancinsa kuwa, yana bambanta gwargwadon bambancin amfanin mutane da kuma aiki guda da ayyuka daban-daban, da kuma lokaci da wuri. Albashin ma'aikatan da kwangilar ta shafa a kan amfanin jikinsu zai bambanta gwargwadon kokarin da suke bayarwa, don haka ana kimanta albashi haka: wannan adadi ga mai karfi, wancan adadi ga mai rauni; kuma wannan albashi ga wannan adadin sa'o'in aiki. Ga yawan sa'o'i, babban albashi, ga kankanin sa'o'i, kankanin albashi, haka dai. Kimanta albashin aiki guda da aka kulla kwangilar daukar aiki a kansa bisa amfanin aikin da wani adadi ne na musamman, kuma zai bambanta tsakanin mutanen da suke yin wannan aiki gwargwadon bambancin kwarewarsu a cikinsa, kamar injiniyoyi misali. Injiniya zai samu wani albashi na musamman, kuma zai bambanta tsakanin injiniyoyi saboda bambancin kwarewa. Haka nan kimanta albashi ga ayyuka daban-daban yana bisa amfanin da ake nufi a cikinsu lokacin daukar wadanda ke aiki a cikinsu, watau masu samarwa. Albashin wadannan ayyuka zai bambanta saboda bambancin amfaninsu ga al'umma; don haka albashin injiniya zai zama wani adadi na musamman, albashin magini wani adadi na musamman, da sauransu. Kimanta albashin mutane a aiki guda ko ayyuka daban-daban a lokuta daban-daban yana bambanta a lokuta daban-daban. Misali, ma'aikacin da ke aiki da dare ana ba shi fiye da ma'aikacin da ke aiki da rana a aiki guda. Haka nan kimanta albashin mutane yana faruwa, ga aiki guda da ayyuka daban-daban, daban a wuri daya fiye da wani wurin. Misali, ma'aikacin da ke cikin hamada ana ba shi fiye da ma'aikacin da ke yin aiki iri daya a birni, da sauransu. Kuma an halatta a kimanta albashi na wani lokaci na musamman, kamar na kowane sa'a, na kowace rana, na kowane wata, da na kowace shekara.

This is in relation to the aspect of the basis of the wage, or in other words the unit upon which estimating the wage occurs. As for the aspect of its difference, it differs according to difference of the benefit in persons and in one job and different jobs, and in the time and place, The wage of workers over whom the contract came over the benefits of their persons will differ according to the effort which they expend, so the wage is estimated as so much for the strong and so much for the weak; and so much wage for so many hours of work. For more hours a higher pay and for lesser hours, lesser pay and so on. The estimation of wage for one job over which the contract of hiring was formed based on the the benefit of work by a specific amount, and it will differ between the persons who perform this work according to the difference of their expertise therein like engineers for example. So the engineer will be given a particular wage, and it will differ between engineers by the difference of the expertise. Similarly is the estimation of the wage for different jobs according to the benefit intended therein during the hiring of those working therein i.e. the producers. The wage for these jobs will differ by the difference of their benefit in the society so the engineer’s wage will be a particular amount, the builder’s wage a particular amount and so on. The estimation of the wage of the people in one job or different jobs at different times is estimated differently at different times. For example, the worker at night is given more than the worker working during daytime in the same job. Similarly the estimation of the wage for people takes place, for one job and for different jobs differently on one place than in another place. For example the worker in the desert is given more than the worker doing the same job in the city and so on. And it is permitted to estimate the wage temporarily by a specific time like hourly, daily, monthly and annually.