Like most public accounting firms, they run jobs per budget hours. If you are not familiar with the projection and spent too much time (per their definition 5-hour budget return should not take you 5.5 hours to finish), it is not acceptable. At the same time, if they required 60 chargeable hours per week and you only worked 64 hours ( which is higher than 60 right?), that is not acceptable either. Because they are really looking for 75 or 80. Very interesting management style. If you can work the hours, you will grow fast but do not expect to get paid fairly.