Year-end Tax Calculator

Year-end tax season — a "13th-month bonus" refund, or a surprise tax bill?

No confusing tables or jargon. Just enter your gross salary, credit/debit card and
cash-receipt spending, housing-savings deposits, and medical costs, and instantly
estimate whether you'll get money back (refund) or owe more (tax due) at the February
settlement — using a model close to Korea's 2025 year-end tax rules.

■ Who it's for
· First-time filers unsure how refunds and tax bills work
· Employees deciding whether to spend more on cards or boost housing savings
· Anyone who wants a quick estimate before filing

■ Key features
· Refund vs. tax-due at a glance — instant estimate as you type
· Step-by-step breakdown: earned-income deduction → bracket tax rates → tax credits
· Major deductions included: card spending over 25% (credit 15% / debit & cash 30%),
40% housing-savings deduction, medical-expense tax credit
· Withholding-rate options (80 / 100 / 120%) to compare scenarios
· Save scenarios: "What if I save more?" "What if I spend more on cards?" (offline SQLite)
· A guide tab explaining year-end tax basics
· Korean & English, light & dark themes
· No sign-up, works fully offline

■ Your data stays private
Salary and spending you enter are stored only on your device and never sent anywhere.

* Results are estimates reflecting major deductions only and have no legal effect. For
exact figures, use the National Tax Service (Hometax) "year-end tax preview".