financial-calculator — Claude Code skill: install guide
Calculates loans, investments, NPV, retirement plans, savings, and risk scenarios from stated assumptions. Useful when the result needs schedules or charts.
npx skills add dkyazzentwatwa/chatgpt-skills --skill financial-calculator -a claude-codeWhat financial-calculator does
This skill handles loan and mortgage payments, investment growth, savings targets, NPV, IRR, payback periods, and retirement withdrawals. It can also model risk scenarios in a Monte Carlo style and return schedules or charts.
The workflow starts by fixing the inputs that affect the result: rates, compounding, time horizon, taxes, and inflation. The computation runs through scripts/financial_calc.py, and the response includes both the result and the assumptions with the largest impact.
The output is a calculation, not personal financial advice. The skill exposes simplifying assumptions and scenario sensitivity, so its numbers depend on the conditions supplied for the model.
What it helps with
- calculate a loan payment schedule
- project investment growth toward a savings goal
- compare NPV, IRR, and payback periods
- model retirement withdrawals over a time horizon
- test financial risk scenarios with Monte Carlo-style cases
Example prompts for the agent
- Calculate the loan payments and return a schedule using the stated rate and term.
- Compare NPV, IRR, and payback for these options, including taxes and inflation.
- Model retirement withdrawals and show how the result changes across risk scenarios.
How to install financial-calculator
1Skills CLI (Vercel)
npx skills add dkyazzentwatwa/chatgpt-skills --skill financial-calculator -a claude-code2Manually: put the files in place
~/.claude/skills/financial-calculator/SKILL.mdCopy the whole skill folder; for one project use .claude/skills/financial-calculator/
1Skills CLI (Vercel)
npx skills add dkyazzentwatwa/chatgpt-skills --skill financial-calculator -a codex2Manually: put the files in place
.agents/skills/financial-calculator/SKILL.mdFor all projects use ~/.agents/skills/
1Skills CLI (Vercel)
npx skills add dkyazzentwatwa/chatgpt-skills --skill financial-calculator -a cursor2Manually: put the files in place
.cursor/skills/financial-calculator/SKILL.mdCursor also reads .agents/skills/ and .claude/skills/
1GitHub CLI
gh skill install dkyazzentwatwa/chatgpt-skills financial-calculator2Manually: put the files in place
.github/skills/financial-calculator/SKILL.md1Skills CLI (Vercel)
npx skills add dkyazzentwatwa/chatgpt-skills --skill financial-calculator -a gemini-cli2Platform CLI
gemini skills install https://github.com/dkyazzentwatwa/chatgpt-skills --path financial-calculatorManually: put the files in place
.devin/skills/financial-calculator/SKILL.mdThe legacy .windsurf/skills/ path still works
Skills CLI (Vercel)
npx skills add dkyazzentwatwa/chatgpt-skills --skill financial-calculator -a opencodeClaude.ai
Zip the folder and upload it in Settings → Capabilities → Skills
Step by step, with commands for each platform: How to install skills in Claude Code: five ways
Questions about financial-calculator
How do I install financial-calculator in Claude Code?
Run npx skills add dkyazzentwatwa/chatgpt-skills --skill financial-calculator -a claude-code, then check ~/.claude/skills/financial-calculator/SKILL.md.
What does financial-calculator do?
It runs deterministic calculations for loans, investments, savings, NPV, IRR, retirement planning, and risk scenarios. The response includes the result and the assumptions that materially affect it.
Which inputs should I provide before a calculation?
Provide the rates, compounding method, time horizon, taxes, and inflation. The skill also surfaces simplifying assumptions and scenario sensitivity.
