05-011 · EVIDENCE B · SOURCE-SENSITIVE
Skipping extended warranties for electronics
拒绝电子产品的延长保修（延保）
There’s no upfront cost. The trade‑off is that after the warranty expires you’ll have to pay for any repairs yourself — though that scenario is relatively unlikely.
Extended warranties typically cost 10% to 50% of the item’s original price. The profit margin on these warranties is roughly ten times higher than that of regular merchandise. In 2003, Best Buy in the U.S. earned over half of its total profits from extended warranties, even though they accounted for only 3% to 4% of its overall revenue. That price gap is exactly the extra money you end up paying.
B
Move “Skipping extended warranties for electronics” to Future Me's calendar
The excuse
Future Me has a clearer calendar, more patience, and apparently the same responsibilities.
What feels good now
Today I keep a few minutes and avoid interrupting my default routine.
What the source says
The source summarizes the return this way: “Extended warranties typically cost 10% to 50% of the item’s original price. The profit margin on these warranties is roughly ten times higher than that of regular merchandise. In 2003, Best Buy in the U.S. earned over half of its total profits from extended warranties, even though they accounted for only 3% to 4% of its overall revenue. That price gap is exactly the extra money you end up paying.” Evidence grade B. The original states the population, caveats, and sources; this is not a personal forecast.
Use the original facts and limits. For an urgent medical, safety, financial, or legal issue, contact a qualified local professional or service.
THE ENGLISH EDITION
Original recommendation and evidence
11. Skipping extended warranties for electronics
Cost: There’s no upfront cost. The trade‑off is that after the warranty expires you’ll have to pay for any repairs yourself — though that scenario is relatively unlikely.
In plain terms: Extended warranties typically cost 10% to 50% of the item’s original price. The profit margin on these warranties is roughly ten times higher than that of regular merchandise. In 2003, Best Buy in the U.S. earned over half of its total profits from extended warranties, even though they accounted for only 3% to 4% of its overall revenue. That price gap is exactly the extra money you end up paying.
Benefit: Extended warranties are priced at 10% to 50% of the product’s original cost. Industry estimates cited in research show that the average gross margin on these warranties sits at 50% to 60%: for every 100 dollars spent on a warranty, 50 to 60 dollars become pure profit. This is roughly 18 times higher than the gross margin on ordinary goods. In 2003, extended warranties made up just 3% to 4% of Best Buy’s revenue yet generated over 50% of its total profits (U.S. retail data from the early 2000s).
Evidence grade: B
Sources: Chen T, Kalra A, Sun B (2009). Why Do Consumers Buy Extended Service Contracts? Journal of Consumer Research 36(4):611-623. <https://doi.org/10.1086/605298>
Notes: The gross‑margin figure comes from an industry estimate referenced in the paper (Business Week, 2004); it wasn’t measured directly by the authors. The calculations above apply to ordinary consumers who can afford a single repair bill. For people who rely on a single device and lack a backup, the calculation changes. Screen‑protection plans for phones must also be evaluated separately: first estimate how often you’re likely to drop the phone, then decide whether the premium is worth it.
Source links
- Chen T, Kalra A, Sun B (2009). Why Do Consumers Buy Extended Service Contracts? Journal of Consumer Research 36(4):611-623. ↗
- 国家经贸委等 (1995). 部分商品修理更换退货责任规定（国经贸〔1995〕458 号，第八条三包有效期自开具发票之日起计算
- 附件《实施三包的部分商品目录（第一批）》洗衣机、家用电冰箱整机 1 年、主要部件 3 年）. 国家市场监督管理总局行政规范性文件. ↗
- Pinned original chapter on GitHub ↗
Read the complete Chinese source and notes
11. 拒绝电子产品的延长保修（延保）
成本: 不花钱。代价是保修期过了以后，万一要修，得自己掏钱，不过这种事概率不大。
说人话: 延保一般卖到原价的 10% 到 50%，卖延保的赚头是普通商品的十几倍，这个差价就是你多付的钱。洗衣机、冰箱的电机这类主要部件，国家本来就规定保修 3 年。碰上很便宜的延保，拿延保价除以修一次的钱，得数就是这几年里至少坏一次的可能要多大才回本。
收益: 延保的定价通常是商品原价的 10% 到 50%。研究里引用的行业估计说，延保的平均毛利率是 50% 到 60%：卖出去 100 元，有 50 到 60 元是赚的。这大约是普通商品毛利率的 18 倍。2003 年，延保只占百思买营收的 3% 到 4%，却贡献了超过 50% 的利润（美国，2000 年代零售数据）。碰上价格远低于这个区间的延保，可以自己算一笔：延保价 ÷ 修一次要花的钱 = 回本需要的故障概率。你估计延保那几年里至少坏一次的可能比这个数大，才值得买。比如 25 元的延保，假设修一次 300 元，至少坏一次的可能要超过约 8% 才回本。这里的 300 元只是举例，不是统计数字。算之前先扣掉国家规定已经保了的部分。国家规定的三包期从开发票那天算：洗衣机和电冰箱整机 1 年，主要部件 3 年。洗衣机的主要部件是电机、定时器、程控器和电容器，电冰箱是压缩机、温控器等。延保和三包重叠的那段，等于花钱买了本来就有的东西（全国，1995 年起）
证据等级: B
来源: Chen T, Kalra A, Sun B (2009). Why Do Consumers Buy Extended Service Contracts? Journal of Consumer Research 36(4):611-623. <https://doi.org/10.1086/605298>；国家经贸委等 (1995). 部分商品修理更换退货责任规定（国经贸〔1995〕458 号，第八条三包有效期自开具发票之日起计算；附件《实施三包的部分商品目录（第一批）》洗衣机、家用电冰箱整机 1 年、主要部件 3 年）. 国家市场监督管理总局行政规范性文件. <https://www.samr.gov.cn/zw/zfxxgk/zc/xzgfxwj/art/2019/art_f943e66de125437d92df701e1654c47c.html>
备注: 毛利率那个数字是论文引用别人的行业估算（Business Week 2004），不是论文自己测出来的。上面的算法适用于自己掏得起一次维修费的普通人。靠一台设备吃饭、又没有备用机的人，要另外算。手机碎屏险这一类也要单独算：先估自己多久摔一次，再看保费划不划算。很便宜的延保买了也亏不了几十元，买之前看清三样：从哪天开始算（从买的那天算的，头几年和三包重叠），是商家、品牌还是第三方公司在保，上门费和换件费另不另收。也先看说明书和保修卡，品牌自己承诺的保修期可能比三包长。
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