Small business owner / finance

Price and margin calculator

Immediate result: The selling price for your target margin, with markup, margin and break-even shown.

Problem it solvesOwners confuse markup with margin and price products at a loss.

Download SKILL.md
Add this skill to
ChatGPTClaudeGeminiPerplexity

You paste

Cost ₹240 per candle, target 40% margin, 18% GST, fixed costs ₹60,000/month

You get

Price before GST = 240 ÷ 0.60 = ₹400 (markup 66.7%)

Customer price = 400 × 1.18 = ₹472

Break-even = 60,000 ÷ (400 − 240) = 375 candles a month

About this skill

About Price and margin calculator

Many small business owners confuse markup with margin and price products at a loss without realising. This skill calculates the selling price needed for your target margin, shows the equivalent markup so the difference is clear, adds GST or VAT to get the customer price and works out how many units you need to sell each month to break even. Every step is shown, so you can redo it for each product and understand the numbers rather than trust them blindly. To use it, paste the skill into your assistant and send unit cost (and its parts), target margin or price, fixed costs and tax; the reply opens with “Price table”.

Price and margin calculator AI skill for Small business owner / finance: you paste "Cost ₹240 per candle, target 40% margin, 18% GST, fixed costs ₹60,000/month" and get "Price before GST = 240 ÷ 0.60 = ₹400 (markup 66.7%)"
Price and margin calculator — example input and the first lines it returns. Works in ChatGPT, Claude and Gemini.
Job profile
Finance & accounting · Small business owner / finance
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 unit cost (and its parts).
The skill — paste this into your AI assistant
# Skill: Price and margin calculator

You are running the "Price and margin calculator" skill for me. I work as: Small business owner / finance. What I need from you: the selling price for my target margin, with markup, margin and break-even shown.

## When I send you unit cost (and its parts), target margin or price, fixed costs and tax
1. Compute price for the target margin: price = cost ÷ (1 − margin).
2. Show the equivalent markup.
3. Add GST or VAT to get the customer price.
4. Compute break-even units from fixed costs.

## Reply in this format
- Price table
- Margin vs markup explained
- Customer price incl. tax
- Break-even

## 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 unit cost (and its parts), target margin or price, fixed costs and tax.

Then sendUnit cost (and its parts), target margin or price, fixed costs and tax. For example: Cost ₹240 per candle, target 40% margin, 18% GST, fixed costs ₹60,000/month

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. Compute price for the target margin: price = cost ÷ (1 − margin).
  2. Show the equivalent markup.
  3. Add GST or VAT to get the customer price.
  4. Compute break-even units from fixed costs.
What you get back

The reply format

  • Price table
  • Margin vs markup explained
  • Customer price incl. tax
  • Break-even
FAQs

Questions about Price and margin calculator

What does the Price and margin calculator skill do?

Owners confuse markup with margin and price products at a loss. The skill fixes that: the selling price for your target margin, with markup, margin and break-even shown.

How do I install Price and margin calculator 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 Price and margin calculator after installing it?

Send unit cost (and its parts), target margin or price, fixed costs and tax. If something essential is missing, the skill asks you one short question and then continues.

Is the Price and margin calculator 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.

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