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Retirekub

retirement calculator

A simple one page retirement calculator made for first jobbers.

Context
Personal project
Role
Built on my own
Status
Live(Last updated Aug, 2026)
Built with
Astro, TypeScript, Tailwind CSS, PostHog, Playwright, GitHub Pages
Retirekub preview card showing a result of 12.4 million baht against a 10 million baht goal.

I'm only a few years into work and my salary isn't big yet, but I've started thinking about the future. I tried many retirement calculators, and most felt far from my reality. They assume your salary grows fast or that you already have a lot saved. As a first jobber, I don't.

So I built a small one for myself and friends who are just starting out. We wanted to see where we'd be at 40 or 50 if we save and invest a certain amount each month. It's free, it's one page, and it doesn't collect anyone's data.

What it does

  • Salary growth. Set your own yearly raise.
  • Saving as a percent of salary. Savings and investments grow along with your income.
  • Separate returns. Savings and investments have their own returns, so you can see how compound interest works.
  • Yearly view. See your money year by year, or summed up by age range.