以下详细说明暂以英文提供。
Markup versus margin
Markup starts from cost: it is the percentage added on top of what you paid. Margin starts from price: it is the percentage of the final price that is profit. Because price is always bigger than cost, the same dollars produce a bigger-looking markup — a 50% markup on a $100 item is a $50 profit, but that is 33.3% of the $150 price. Mixing the two up is the classic pricing mistake: “50% margin” prices an item at double cost, while “50% markup” leaves margin well below half.
Setting a markup that works
A markup has to cover more than the item itself: rent, labor, spoilage, returns, card fees, and the items you never sell all come out of the same pool of gross profit. Retail markups commonly run 50–100%, while groceries accept far less and jewelry expects far more. The useful check is whether margin × realistic volume covers your fixed costs — the break-even calculator turns that question into a number of units.
中国本地参考
在中国大陆做财务换算时，以下框架值与美国默认值差异很大：
- 个人所得税: 工资薪金基本减除费用为 5,000 元/月（60,000 元/年），综合所得适用 3%–45% 七级超额累进税率（自 2019 年起施行）。
- 社保与公积金: 养老保险单位缴费 16%、个人 8%；住房公积金常见缴存比例为 5%–12%，由各城市确定上下限。
- 价签与增值税: 标价为含税价（一般纳税人增值税率 13%/9%/6%），结账时不额外加税，与美国小票加税习惯不同。
- 数字与单位: 使用公制单位（厘米、米、千克、升），温度为摄氏度；人民币符号 ¥，千分位用逗号、小数用点：12,345.67 元。
- 小费文化: 餐厅不付小费，部分场所收取服务费并已在账单中标明；无需按美式 15%–20% 计算。
数据核对：2026 年 10 月
常见问题
How do I convert markup to margin?
Divide the markup by itself plus 100. A 50% markup becomes 50 ÷ 150 = 33.3% margin; a 100% markup is a 50% margin.
Can markup be negative?
Yes — clearance pricing often sells below cost. This calculator allows any markup above −100%, which is the point where the price itself would turn negative.
Does the revenue figure include taxes?
No. Revenue here is price × units before sales tax; add your local sales tax separately at the register or invoice level.