About this website
JungyuMarket Business Calculators is a free Korean-language hub of twenty business calculators for small shops, freelancers and salaried workers. Each page shows the formula, the official rate it uses (2026 minimum wage of 10,320 KRW an hour, VAT at 10%, the published commission tiers of the delivery platforms) and a worked example, so a reader can check the arithmetic instead of trusting a black box. Pages cover the payout a restaurant keeps after commission, card fee, shop-paid delivery and VAT; weekly holiday pay for part-timers; the rent tax credit at 15-17%; 3.3% withholding for freelancers; severance pay; menu cost ratio; the conversion between jeonse deposit and monthly rent; brokerage fees; and gift tax with the marriage and childbirth deduction. Every calculator runs in the browser itself. There is no account, no install, and the amounts typed in are never sent to a server, so the same page works on a shop-counter phone and on a laptop.
Key features
- Delivery-app payout after commission, card fee, delivery cost and VAT
- Weekly holiday pay, hourly wage and take-home pay for part-time staff
- Rent tax credit, 3.3% withholding, severance pay and the four major insurances
- Formula, official 2026 rate and a worked example on every page
- Runs in the browser only: no account, no install, no data sent to a server
Who is this website for?
Korean small-business owners, delivery-app restaurant operators, part-time staff, freelancers and salaried employees who need one monthly figure without opening a spreadsheet.
What can visitors do here?
Type an order amount, a wage or a rent into any of the twenty calculators and read the result with its formula beside it; for example, see what a 20,000 KRW delivery order leaves after 7.8% commission, a 3% card fee and 2,900 KRW of shop-paid delivery.
What makes it different?
Most Korean calculator pages bury the formula behind ads. Here the rate, its legal source and a worked example sit on the same page, and no input ever leaves the browser, so any number can be rechecked by hand.
