---
title: "Engagement structure: fixed-scope vs retainer vs equity"
slug: "comparisons/engagement-structure-fixed-scope-vs-retainer-vs-equity"
section: "Comparisons"
description: "| Term | Fixed decision review | Recurring retainer | Equity linked advice | Internal / AI | | | | | | | | What is bought | Defined opinion by deadline | R"
internal_only: false
---

# Engagement structure: fixed-scope vs retainer vs equity

| Term | Fixed decision review | Recurring retainer | Equity-linked advice | Internal / AI |
|---|---|---|---|---|
| What is bought | Defined opinion by deadline | Repeated access and continuity | Time plus ownership upside | Team time, tools |
| Scope failure mode | Unscoped extra questions | Renewal without new outputs | Hidden total cost/dilution | Unchallenged assumptions |
| Budget comparison | Total fixed fee + exclusions | Minimum months × fee + extra hours | Fully diluted shares + cash + vesting | Time opportunity cost + software |
| Exit | Accept deliverable and finish | Termination/notice rules | Vesting and repurchase provisions | Stop using process |
| Independence risk | Adviser referrals/transaction tie | Incentive to extend engagement | Direct financial exposure to chosen outcome | Founder preference / algorithm |

The supplied context's illustrative fees (e.g., $2,000–$10,000 for a decision review) remain **unverified planning assumptions**. They are not live quotes or market medians. Obtain at least two like-for-like scoped proposals and compare exclusions, revision cycles, access, cancellation and confidentiality. Seek equity-specific legal advice if applicable. [The SAFE — Y Combinator](https://www.ycombinator.com/safe)