startup-financial-modeling Skill for Claude: Build a Startup Financial Model

Guides Claude to build a 3 to 5 year startup financial model with revenue, costs, cash flow and three scenarios.

Installs: 12.9K; on skills.sh
Stars: 42.1K; on GitHub
Files: 1; besides SKILL.md
Updated: Oct 2026; last repo commit

startup-financial-modeling is a guidance skill from the wshobson/agents collection, written for early-stage startups. When you ask Claude for financial projections, burn rate and runway, or fundraising scenarios for a seed or Series A raise, it follows the skill's nine-step Quick Start and its structure for revenue, costs, headcount and cash flow.

The skill bundles no scripts or spreadsheet files. It gives Claude the formulas, ratios and checks to use in whatever format you ask for. The ratios in it are rules of thumb from the skill text, so check them against your own market.

Good for

Founders preparing projections for a seed or Series A raise
Finance leads who need runway and burn calculations
Operators comparing conservative, base and optimistic plans
Anyone sanity-checking a model before showing it to investors

Install startup-financial-modeling

Claude Code

Copy this prompt.

Install the startup-financial-modeling skill in Claude Code. Run this command:

/plugin marketplace add wshobson/agents
/plugin install startup-business-analyst@claude-code-workflows

Then check that it loaded and tell me how to use it.

2
Paste it into Claude Code. It shows the change and asks before running it.

Pick one route. The plugin routes install the whole startup-business-analyst plugin: 1 agent, 3 commands and 5 skills (counted from the plugin folder in the repo tree, which has no hooks or MCP config files). The skills-only routes install just this skill, with no agents or commands.

From the project README. Source.

What's in the skill

When it loads

Build comprehensive 3-5 year financial models with revenue projections, cost structures, cash flow analysis, and scenario planning for early-stage startups. Use this skill when creating financial projections, calculating burn rate or runway, modeling fundraising scenarios, or preparing investor-ready financials for a seed or Series A raise.

Sections in SKILL.md

Overview
Core Components
Revenue Model
Cost Structure
Cash Flow Analysis
Headcount Planning
Financial Model Structure
Three-Scenario Framework
Time Horizon
Detailed section: Step-by-Step Process
Business Model Templates
SaaS Financial Model
Marketplace Financial Model
E-Commerce Financial Model
Services / Agency Financial Model
Fundraising Integration

Key facts

Author: wshobson
Repository: wshobson/agents
Installs on skills.sh: 12,866 as of 2026-11-02
GitHub stars: 42,081 for the whole repo, 2026-11-02
License: MIT (repo metadata)
Last commit to the repo: 2026-10-30
Files: 2 files including SKILL.md (SKILL.md and references/details.md)
Covers: Cohort revenue, cost structure, headcount, cash flow, three scenarios, SaaS/marketplace/e-commerce/services templates, fundraising

What it includes

Model, revenue, costs, headcount, cash flow, metrics, scenarios, checks, raise
The nine steps run in order, from business model and pricing to funding rounds and milestones.
Try: “Build a 3-year financial model for my B2B SaaS startup with a base and a conservative case.”
Quick Start (9 steps)
Cohort-based MRR and ARR plus COGS, S&M, R&D and G&A
Revenue is built from cohort size, retention and ARPU. Costs are split into COGS, sales and marketing, R&D and general and administrative.
Revenue and cost model
Burn, ending cash and months of runway
Gives formulas for runway and burn, and lists the inputs: starting cash, inflows, outflows and ending cash.
Try: “Calculate our burn and runway from these monthly numbers.”
Cash flow and runway
Conservative (P10), base (P50) and optimistic (P90)
Defines what changes in each case and which case to use for cash management, board reporting and upside planning.
Three scenarios
SaaS, marketplace, e-commerce and services drivers and ratios
Lists the revenue drivers and typical ratios for four business types, with example projections for SaaS and marketplace.
Business model templates
Pre-money, post-money, dilution and use of funds
Shows the dilution formula and an example raise, and advises planning enough runway for the next milestone plus a 6 month buffer.
Try: “Model a $5M raise at a $20M pre-money valuation and show the dilution.”
Fundraising integration
Sanity checks and common pitfalls
A checklist covering growth rates, unit economics, burn multiple and headcount, plus five pitfalls such as over-optimistic revenue and ignoring cash timing.
Model validation

From the official docs

Questions

What does the startup-financial-modeling skill do?

It gives Claude a method for building a startup financial model: revenue, costs, headcount, cash flow, metrics, scenarios and fundraising.

How do I install it in Claude Code, the Claude app or Codex?

Use the install box at the top of this page. It installs the skill folder with SKILL.md and references/details.md.

Does it create a spreadsheet?

The skill does not say so and bundles no scripts. Ask Claude for the format you want, such as a table, CSV or spreadsheet formulas.

Can I trust the benchmark ratios?

Treat them as starting points. The skill lists ratios such as gross margin of 75 to 85 percent for SaaS and says to compare against similar companies at your stage.

Is it safe?

It is instructions with no bundled scripts and no API key mentioned. Your financial figures go into the Claude conversation, so share only what you are comfortable sending to your AI provider.

Is it financial advice?

The skill is a modeling guide, not advice, and its example projections are illustrations. Our suggestion, not the skill's: have an accountant or advisor review numbers you plan to show investors.

Information

updated Nov 2, 2026

Repository: wshobson/agents
Folder: plugins/startup-business-analyst/skills/startup-financial-modeling

wshobson/agents skills.sh

Sources

Docs, issue trackers and discussions this page is built from.

Show all 4

startup-financial-modeling SKILL.md · github.com
wshobson/agents README · github.com
startup-business-analyst plugin manifest · github.com
startup-financial-modeling references/details.md · github.com