One Hub for Payroll, Tax & Loan Calculators Worldwide
Free payroll, tax and loan tools for every country we cover — from US take-home pay and mortgages to UK, Canadian, Australian, New Zealand, Irish and Korean deductions. Everything is calculated instantly in your browser: 100% private, no sign-up.
🇺🇸United States
US Paycheck & Take-Home Pay Calculator
Accurately calculate net pay after Federal Income Tax, FICA (Social Security & Medicare), and 50 State income taxes for 2025~2026.
US Mortgage & Amortization Calculator
Estimate monthly home payments including principal, interest, property taxes, home insurance, and view the full amortization schedule.
1099 Freelance & Self-Employment Tax Estimator
Calculate 15.3% Self-Employment (SE) tax, federal tax bracket liability, business deductions, and quarterly estimated tax payments.
401(k) Retirement & Growth Calculator
Simulate retirement nest egg growth with employer matching contributions, salary growth, and compound investment returns.
US Restaurant Tip & Bill Splitter
Easily calculate 15%, 18%, 20% standard gratuity and split checks evenly among friends with one click.
🇰🇷대한민국 (Korea)
연봉 실수령액 계산기 (한국)
국민연금·건강보험·장기요양·고용보험 4대보험과 근로소득세를 반영한 월 실수령액을 연봉/월급 기준으로 계산합니다.
퇴직금 & 연차수당 계산기 (한국)
근로기준법에 따른 최근 3개월 평균임금과 총 재직일수를 기준으로 예상 퇴직금을 산출합니다.
부가세(VAT) & 할인율 계산기 (한국)
세금계산서용 공급가액·부가세 10% 자동 분리 계산과 세일 할인율·최종 실구매가 역산 계산을 제공합니다.
대출이자 계산기 (한국)
원리금 균등·원금 균등·만기일시 상환 방식별 월 납입액과 총 이자를 한눈에 비교합니다.
실생활 단위 변환기 (평 ⇄ ㎡)
아파트 평수와 제곱미터, 인치·cm, 파운드·kg 등 실생활 단위를 실시간으로 상호 변환합니다.
연봉 협상 스크립트 생성기 (한국)
성과 지표와 희망 연봉을 입력하면 사내 연봉 협상 면담용 한국어 스크립트를 즉시 만들어 줍니다.
자소서 글자수 & 바이트 계산기 (한국)
공백 포함/제외 글자수, 채용사이트별 바이트(Byte), 단어수, 원고지 장수를 실시간으로 측정합니다.
🌐Global Utilities
Web SaaS & Solopreneur BEP Calculator
Calculate Revenue >= (Hosting + Domain + AI Cost). Find your break-even point and monthly profit margins.
Instant QR Code Generator
Generate high-resolution QR codes for websites, text, and Wi-Fi networks. Free PNG download.
Secure Password Generator
Generate strong, cryptographically secure passwords with customizable lengths and character sets.
Browse Calculators by Country
Each country hub explains the local tax rules and links every calculator for that system.
United States
Paycheck, mortgage, 1099 tax and 401(k) calculators
United Kingdom
Take-home pay, National Insurance and pension tools
Canada
Net pay with federal, provincial, CPP and EI deductions
Australia
Take-home pay, Medicare levy and superannuation tools
New Zealand
Take-home pay after PAYE, the ACC earners' levy and KiwiSaver
Ireland
Net pay after Income Tax, USC, PRSI and pension relief
대한민국 (Korea)
연봉 실수령액, 퇴직금, 부가세, 대출이자 계산기
Global Utilities
Everyday tools that work everywhere
Why Choose SmartPayCalc?
Built for speed, privacy, and precision math across every tax jurisdiction we support.
100% Client-Side Speed
All amortization, tax bracket, and compound calculations run in your browser instantly. No server latency, no loading spinners.
Absolute Privacy Guarantee
Your salary, home purchase price, and tax information never leave your device. We do not store or transmit your personal financial numbers.
Current Statutory Formulas
Verified against the published rules of each country's revenue authority — IRS, HMRC, CRA, ATO, New Zealand's Inland Revenue, Ireland's Revenue Commissioners and Korea's National Tax Service — for the current tax year, with scope limits documented on every calculator page.
Common Questions & Answers
Are these calculators completely free to use?
Yes, 100% free with no sign-up or paywalls. We are supported by non-intrusive sponsor advertisements, allowing us to keep every calculator accessible to everyone.
Which countries are supported?
Payroll and tax tools are available for the United States, the United Kingdom, Canada, Australia and South Korea. Global utilities such as the QR code generator, password generator and break-even calculator work anywhere. New countries are added as statutory rates are verified.
Does this calculator substitute for a certified financial planner (CFP) or CPA?
No. Our tools provide accurate mathematical estimates for educational and planning purposes. For binding tax filings and personalized wealth management, always consult a licensed tax professional in your jurisdiction.