#0129先算出对方的起点在哪Start by computing their starting number

DVClaim · 车修好了，但从此带着事故记录DVClaim · Repaired, but permanently on the record

车被追尾，对方全责，修好了。但同样的车、同样的车况，因为多了一条事故记录，转手时就是少卖几千——**这部分损失叫贬值损失（diminished value），在对方全责的情况下通常是可以向对方保险公司单独主张的**。而且它不会自动发生：维修费赔了不等于这一项处理过了，**没有人会主动提醒你**。 难点在于保险公司怎么算。业内最常用的是所谓 **17c 公式**：先取事故前市值的 **10% 作为封顶**，再乘一个损伤系数，再乘一个里程系数。这个公式完全机械，所以代码能替你先算一遍——**知道对方的起点在哪，比不知道自己在跟什么谈判要好得多**。 算完你会看到它的三个问题：**10% 的封顶没有依据地锁死了上限**；**里程系数在超过十万后直接归零**（意味着按这个公式，高里程车不存在贬值损失，这显然不符合常识）；损伤系数由对方评估。 真正接近事实的算法是差额法——**事故前市值减去修复后带事故记录的市值**——这需要一份独立评估报告。所以 17c 结果的正确用法是：**它是对方的起点，不是你的终点**。当实际差额明显大于它时，那几百块评估费通常远小于它带来的差额。 **能不能主张、时限多久，各州差异极大，这里刻意不给任何规则或时限。** 给的是去哪查（你所在州的保险监管部门）以及现在必须固定的四样证据——其中「事故前的车况照片」时间过了就补不回来。 $3 解锁索赔信与评估报告的使用方法、对方压价话术的逐条应对、以及被拒之后的升级路径。Someone rear-ended you, they were at fault, the car is repaired. But the same car with an accident on its record sells for thousands less — **that gap is diminished value, and where the other driver is at fault it can usually be claimed separately from their insurer**. It doesn't happen automatically: paying for the repair doesn't settle it, and **nobody will remind you**. The difficulty is how insurers compute it. The most common approach is the so-called **17c formula**: cap the claim at **10% of pre-accident value**, then multiply by a damage modifier and a mileage modifier. It's entirely mechanical, so the code runs it for you — **knowing their starting number beats negotiating blind**. Running it also exposes its three problems: **the 10% cap limits recovery arbitrarily**; **the mileage modifier drops to zero past 100,000** (implying a high-mileage car suffers no diminished value, which is plainly untrue); and the damage modifier is assessed by the other side. The method that tracks reality is the difference method — **pre-accident market value minus post-repair value with the accident on record** — which requires an independent appraisal. So the right use of the 17c figure is: **it's their opening position, not your ceiling**. Where the real gap clearly exceeds it, an appraisal costs far less than the difference it recovers. **Whether such a claim is available and any time limits vary enormously by state, so no rules or deadlines are given here.** What you get instead is where to look them up, and the four pieces of evidence to secure now — one of which, photographs of the car's pre-repair condition, cannot be recreated later. $3 unlocks the demand letter and how to use an appraisal, replies to each standard adjuster tactic, and the escalation path after a denial.

**本工具不提供法律、保险或估值意见。** 17c 是一个被许多保险公司采用的估算公式，**不是法定标准，也不是唯一被接受的方法**；本工具复现它是为了让你了解对方可能的起点，**不代表你应当接受这个数字，也不代表你能拿到这个数字**。计算结果完全依赖你填写的事故前市值、里程与损伤程度，**这些参数本身就是争议焦点**。**贬值损失能否主张、向谁主张、如何计算、是否有时限，各州与各国规定差异极大，本工具刻意不提供任何具体规则或期限**——请查询你所在地保险监管部门的官方说明，或咨询处理机动车索赔的律师（此类咨询通常免费）。第一方索赔（向自己的保险公司）在多数保单中不覆盖贬值损失。请勿依据本工具的输出接受或拒绝任何和解。你填写的内容不入库。**This is not legal, insurance or valuation advice.** 17c is an estimation formula used by many insurers; it is **not a legal standard and not the only accepted method**. Reproducing it here shows you their likely starting point — it **does not mean you should accept that figure, nor that you will receive it**. Output depends entirely on the pre-accident value, mileage and severity you enter, and **those inputs are themselves what gets disputed**. **Whether diminished value is claimable, from whom, how it is calculated, and any time limits vary enormously by jurisdiction, and none are stated here, deliberately** — check your state insurance department or consult an attorney handling motor vehicle claims (such consultations are commonly free). First-party claims against your own policy generally do not cover diminished value. Do not accept or reject any settlement based on this output. Nothing you enter is stored.