Department head / FP&A

Department budget builder

Immediate result: A bottom-up budget by line and month tied to your plan's drivers, with assumptions listed.

Problem it solvesAnnual budgets start from last year plus 10% instead of what the plan actually needs.

Download SKILL.md
Add this skill to
ChatGPTClaudeGeminiPerplexity

You paste

Support team: 12 agents now → 18 by July, ₹45,000 per agent/month, helpdesk tool ₹1,800/seat

You get

People: 12 agents Jan–Jun, 18 Jul–Dec → ₹81 lakh for the year

Tools: seats follow headcount → ₹3.2 lakh

Assumption: hires start 1 July; each month of delay saves ₹2.7 lakh.

About this skill

About Department budget builder

Annual budgets often start from last year plus ten percent instead of what the plan actually needs. This skill builds a bottom-up budget from your drivers — headcount, tools, campaigns and projects — phases each line by month, separates fixed from variable costs and lists the assumptions and the three biggest risks. Because every line traces back to a driver, you can see immediately what changes when a hire slips or a project is cut. To use it, paste the skill into your assistant and send your goals for the year, headcount plan, current costs and known projects; the reply opens with “Budget table by line and quarter”.

Department budget builder AI skill for Department head / FP&A: you paste "Support team: 12 agents now → 18 by July, ₹45,000 per agent/month, helpdesk tool ₹1,800/seat" and get "People: 12 agents Jan–Jun, 18 Jul–Dec → ₹81 lakh for the year"
Department budget builder — example input and the first lines it returns. Works in ChatGPT, Claude and Gemini.
Job profile
Finance & accounting · Department head / FP&A
Works in
ChatGPT, Claude, Gemini, Copilot, Claude Code
Format
Agent Skills (SKILL.md)
Price
Free, no sign-up
Install instructions

Copy, paste, send

  1. Cold email writerCopy skillCopied ✓1 Copy the skillPress Copy skill.
  2. ANY AI ASSISTANTSKILLPaste here, then press Enter2 Paste it into a new chatChatGPT, Claude, Gemini or Copilot.
  3. ANY AI ASSISTANT3 Send your inputSend your goals for the year.
The skill — paste this into your AI assistant
# Skill: Department budget builder

You are running the "Department budget builder" skill for me. I work as: Department head / FP&A. What I need from you: a bottom-up budget by line and month tied to my plan's drivers, with assumptions listed.

## When I send you my goals for the year, headcount plan, current costs and known projects
1. Derive cost lines from drivers (people, tools, campaigns, projects).
2. Phase each line by month.
3. Separate fixed from variable costs.
4. List assumptions and the three biggest risks.

## Reply in this format
- Budget table by line and quarter
- Drivers and assumptions
- Fixed vs variable
- Risks

## Rules
- Use only the facts I give you; mark anything you had to assume with [ASSUMPTION].
- If something essential is missing, ask me one short question, then continue.
- No preamble or filler: start with the result.

Confirm you're ready in one line, then wait for me to send my goals for the year, headcount plan, current costs and known projects.

Then sendYour goals for the year, headcount plan, current costs and known projects. For example: Support team: 12 agents now → 18 by July, ₹45,000 per agent/month, helpdesk tool ₹1,800/seat

ChatGPT

  1. Fastest: paste the skill as your first message in a new chat, then send your input.
  2. To keep it: open a Project, choose Instructions (or Settings → Personalization → Custom instructions for every chat) and paste it there.
  3. To share it with a team: create a custom GPT and paste the skill into its Instructions.
  4. In the Codex app: copy the skill's folder into ~/.codex/skills/ (or Customize → Skills → Add → Create skill).

Claude

  1. Fastest: paste the skill as your first message in a new chat, then send your input.
  2. To keep it: create a Project, open Project instructions and paste the skill.
  3. As a Claude Skill: download the skill's ZIP, then in Claude open Settings → Skills → Add → Upload skill and choose the file.

Gemini

  1. Fastest: paste the skill as your first message in a new chat, then send your input.
  2. To keep it: open Gems → New Gem, paste the skill into Instructions and save.

Microsoft Copilot

  1. Fastest: paste the skill as your first message, then send your input.
  2. In Microsoft 365 Copilot, save it as a prompt or paste it into an agent's instructions to reuse it.

Any other assistant

  1. Paste the skill as the system prompt or first message in any chat assistant (Perplexity, Meta AI, DeepSeek, Mistral, local models).
  2. Coding agents that read the Agent Skills format (SKILL.md) can load the downloaded file from their skills folder.

Install it permanently

Upload it to Claude, add it to ChatGPT's Codex app, clone it into Claude Code, or download the SKILL.md for any agent. Full guide with screenshots →

Download the ZIP and upload it in Claude. Claude then uses the skill on its own whenever a request matches.

Download ZIP

Quick setup

  1. In Claude, open Settings → Skills (under Customize).
  2. Click Add → Upload skill.
  3. Choose the ZIP — don't unzip it — and make sure the skill is switched on.
Claude Settings with Skills selected under Customize, and the Add menu open showing Upload skill, Create a skill, Create with Claude and Record your screen

Repositoryscienceofapps.com/skills/ai-skills.git · all 200 skills, one folder each, plain git over HTTPS

What it does

The steps it follows

  1. Derive cost lines from drivers (people, tools, campaigns, projects).
  2. Phase each line by month.
  3. Separate fixed from variable costs.
  4. List assumptions and the three biggest risks.
What you get back

The reply format

  • Budget table by line and quarter
  • Drivers and assumptions
  • Fixed vs variable
  • Risks
FAQs

Questions about Department budget builder

What does the Department budget builder skill do?

Annual budgets start from last year plus 10% instead of what the plan actually needs. The skill fixes that: a bottom-up budget by line and month tied to your plan's drivers, with assumptions listed.

How do I install Department budget builder in ChatGPT, Claude or Gemini?

Copy the skill and paste it as the first message of a new chat, then send your input. To keep it, paste it into a ChatGPT Project or custom GPT, a Claude Project or a Gemini Gem, or upload the SKILL.md file as a Claude Skill.

What do I send Department budget builder after installing it?

Send your goals for the year, headcount plan, current costs and known projects. If something essential is missing, the skill asks you one short question and then continues.

Is the Department budget builder skill free?

Yes. It's free to copy, use and adapt, with no sign-up, and works in the free versions of ChatGPT, Claude, Gemini and Copilot.

More for finance & accounting
Accountant / controller

Audit prep checklist

ProblemYear-end audits drag on because documents are found one request at a time.

You paste

Indian private limited company, FY ending 31 March, audit starts 15 May

You get

Cash: bank statements and reconciliations for all accounts as at 31 March — owner: accounts, due 30 April

Tax: GSTR-1/3B vs books reconciliation

Common gap: fixed-asset register not matching invoices.

Immediate resultA checklist of documents and reconciliations by area, with owners and due dates.

How to use it
Analyst / investor relations

Financial report summarizer

ProblemAnnual reports and earnings releases run to hundreds of pages.

You paste

Q2 FY27 earnings release of a listed IT services company (pasted)

You get

Revenue ₹12,410 crore, +6.2% YoY in constant currency (p. 2)

Guidance unchanged at 5–7% for FY27, 'subject to deal ramp-ups' (p. 4)

Question: why did attrition rise while headcount fell?

Immediate resultA one-page summary of the report: results, guidance, risks and questions, with page references.

How to use it
FP&A analyst / controller

Variance commentary

ProblemMonthly budget-vs-actual packs need commentary on every line, and writing it takes a day.

You paste

Marketing: budget ₹12,00,000, actual ₹15,60,000 · note: Diwali campaign pulled forward

You get

Marketing: ₹3,60,000 (30%) over budget — unfavourable.

Driver: Diwali campaign spend pulled forward from November (per note).

Expect November to be under budget by a similar amount — confirm with marketing.

Immediate resultLine-by-line variance commentary with amounts, percentages and the likely drivers to confirm.

How to use it

All 12 finance & accounting skillsAll 200 skillsRead it in the articleProve it: Financial Statement Analysis Certification (free test)

Free PDF · 74 pages · 2 editions

The Laws of UX, in one field guide

60 research-backed principles in 6 categories — what each one means, why it works on the human brain and how to use it on your own screens. Written by Sushant Singh, founder of Science of Apps, who has scaled consumer apps to lacs of users and spent 10+ years leading product across startups and digital businesses in the US, EU & India.

Pick your edition
Free. No card, no paywall — just your email.
Free PDF · 74 pages

Get Laws of UX by email

Choose your edition

You’ll also get occasional UX psychology tips. Unsubscribe anytime. Privacy policy

Free PDF · 90 pages · 2 editions

100+ Subscription Paywalls, decoded

110 real paywalls from top apps, taken apart, rated out of 5 and decoded with the Laws of UX — plus the frameworks, copy and checklists to ship your own. By Sushant Singh, founder of Science of Apps.

  • 110 paywalls rated
  • 34 Laws of UX
  • 12 frameworks

Which paywall scored 4.8 out of 5, and which scored 2.6? It’s all inside.

Pick your edition
Free. No card, no paywall — just your email.
Free PDF · 90 pages

Get 100+ Paywalls, Decoded by email

Choose your edition

You’ll also get occasional UX psychology tips. Unsubscribe anytime. Privacy policy