---
title: "什么是 Time & Material？"
canonical: https://wavect.io/zh/glossary/time-and-material/
language: zh
description: "你为投入的工时付费，而不是为交付的成果付费。供应商不承担交付风险；风险全在你这边。"
image: "https://wavect.io/img/general/bak/open_graph_preview.jpg"
---

合作模式

# Time & Material

你为投入的工时付费，而不是为交付的成果付费。供应商不承担交付风险；风险全在你这边。

最近审阅: 2026-05-24 审阅人 [Kevin Riedl](/zh/team/kevin-riedl/) [wiki ↗](https://www.wikidata.org/wiki/Q139796365)

Time & Material 是 Staffing Agency 与多数 Freelance 合同的默认模式。你按小时或按天付费；供应商记录工时；账单按月来。合同里没有「交付物」这件东西，只有「合同约定的投入」。在奥地利与德国法律下，这对应 Dienstvertrag：供应商承担的是努力与勤勉，而不是一个完成的成果物。那个法律区分就是全部要害，也正是为什么一份 [SoW](/zh/glossary/sow/) （即 Werkvertrag）是一种根本不同的工具，而不只是另一种开账单的方式。

这种模式在「没人假装供应商对结果负责」这一点上是诚实的。它也是常见合作模式中激励对齐最差的：供应商的动机是多记工时，而不是更快做完。聪明的客户会给 T&M 加上预算上限和清晰范围，本质上是在没有法律牙齿的情况下把一份 [固定价格](/zh/glossary/fixed-price/) 合作重新发明一遍。

T&M 怎么走偏，举个实际例子：一位创始人为一个大家早已谈妥的功能签了一份「用 T&M 保持灵活」的合同。三个月和四万欧元之后它完成了七成，外包提议再加六周，而创始人没有任何合同杠杆可拉，因为他从没命名一个交付物。同样的工作要是按 Werkvertrag 来定范围，那个「完成七成」的问题就该由供应商在供应商自己的成本上去解决。

Wavect 在范围真的无法事先定义的探索性项目里才用 T&M。我们不把它当默认。诚实的取舍是真实的：对开放式研究或不可预测的维护，T&M 确实是正确的模式，强加一个固定范围只会让我们虚报估算或为「做完了」争吵。经验法则是：当还没人能描述交付物时用 T&M，一旦能描述了就立刻切到 [Retainer](/zh/glossary/retainer/) 或一份 SoW。如果一个供应商把有明确交付物的工作往 T&M 上推，他就是在把风险塞给你。

**在软件项目中何时最关键。** 每当供应商对一项大家已经谈妥的工作提议按小时计费时。那正是交付风险悄悄从供应商转到你身上的点，多数创始人直到账单跑过产出才察觉。

**创始人通常会搞错什么。** 他们为了「保持灵活」而对一个从不真正不确定的功能选了 T&M。三个月、一张五位数账单之后，它做到 70%，他们却没有合同杠杆，因为从未命名过交付物。

**Wavect 如何处理。** 我们只对真正开放式的工作用 T&M，并用预算上限和每周燃尽来设限。 [固定价格对比 Time and Materials 指南](/zh/software-development-guide/fixed-price-vs-time-and-materials/) 讲清了每种模式在什么时候才是诚实的选择。

// FAQ

## 常见问题

### T&M 有适合的时候吗？

有：当范围确实无法事先定义时。早期发现、探索性研究、需求不可预测的持续平台维护。除这些情形之外，T&M 几乎总是供应商在把风险卸给你。

### 怎么让一段 T&M 合作保持诚实？

预算上限、冲刺级别的范围、每周的燃尽报告，以及一条干净的退出条款。如果供应商抗拒其中任何一项，他们就是在为工时计费，而不是为成果。给合同封顶，或者转到一份 SoW。

### 为什么人力中介这么卖力地推 T&M？

因为他们的利润，是他们付给工程师的钱和按小时向你收的钱之间的差价。合作跑得越久，他们赚得越多。这个模式对他们有利可图，恰恰是因为它不承担任何交付风险。

相关术语

- [SoW](/zh/glossary/sow/)
- [固定价格](/zh/glossary/fixed-price/)
- [Retainer 保留费](/zh/glossary/retainer/)

相关服务

- [软件开发](/zh/services/software-development/)

相关案例研究

- [债券分析平台](/zh/case-studies/bond-analytics/)

相关对比

- [wavect-vs-staffing-agencies](/zh/compare/wavect-vs-staffing-agencies/)
- [wavect-vs-freelance-platforms](/zh/compare/wavect-vs-freelance-platforms/)

聊聊

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