孫吳在戶口登記中可能沿用了漢代的年齡段劃分標準及稱呼，14歲以下者稱為「小」，15歲以上者稱為「大」，「大」之中又以60或61歲為界，分為「大」和「老」。孫吳算賦的起徵年齡可能為15歲，與漢代相同；而最高年齡為59歲或60歲，比漢代略高。孫吳可能對14歲以下的兒童也徵收一定數量的人頭稅。走馬樓戶籍簡中依次出現的口、事、筭、事這四項數字，前一「事」當指有勞動能力的人，包括成年男女及有一定勞動能力的未成年男女 (或次丁)，而後一「事」則指應當服役的人。

The Sun- Wu dynasty government appears to have followed the Han dynasty’s system of dividing and naming age groups, with people aged 14 and below being called xiao (小young) and anyone 15 or older referred to as da (大adult),a category that was further divided into da (大adult labor) and lao (老old)with an age of 60 or 61 serving as the dividing line. Capitation was first collected when a person reached the age of 15, the same as during the Han, and was collected until a person was 59 or 60, slightly longer than during the Han. The Sun- Wu government may have also levied a certain amount of capitation on people 14 and younger. Of the four items that appear on slips of household register, i.e., kou口, shi事, suan筭, and shi事, the first shi事 seems to refer to people capable of performing labor, including both adult men and women and some children of either sex (or sub-adults), while the second refers to people who should perform corvee labor for the government.