About Olikit

Free, accurate financial calculators designed for every country we serve.

Our Mission

Olikit makes financial planning accessible to everyone. We provide free online calculators that help you understand your salary, taxes, mortgage affordability, investment growth, and retirement readiness. Every calculator is localized for the country you live in, using up-to-date tax brackets, contribution rates, and financial regulations.

What We Offer

• Salary Calculators — Take-home pay after income tax, social contributions, and deductions in each country.
• Tax Calculators — Estimate your income tax liability with progressive brackets, credits, and offsets.
• Mortgage Calculators — Monthly payments, affordability, stamp duty, and amortization schedules.
• Investment Calculators — Compound interest projections with regular contributions.
• Retirement Calculators — Pension readiness with state pension and retirement account projections.
• Business Loan Calculators — Loan payments, total interest, and affordability analysis.
• Profit Margin Calculators — Margin, markup, and break-even analysis for businesses.

Data Sources & Methodology

Tax brackets, contribution rates, and financial thresholds are sourced from official government publications for each country. Every calculator uses the most recent published data from the relevant national authority.

• United States — IRS Publication 15, state revenue departments, BLS, SSA
• United Kingdom — HMRC rates and allowances, ONS, gov.uk
• Australia — ATO tax rates, Super Guarantee legislation, ABS
• Canada — CRA tax brackets, CPP/EI contribution rates, Statistics Canada
• India — Income Tax Act, CBDT notifications, EPFO orders, MOSPI
• New Zealand — IRD tax rates, ACC levy schedules, Stats NZ
• Singapore — IRAS tax rates, CPF Board contribution schedules, SingStat

Localization Methodology

Every calculator applies country-specific rules. Salary calculators use the correct progressive tax brackets, social contribution rates, and deduction rules for each jurisdiction. Mortgage calculators factor in local stamp duty, transfer taxes, and loan-to-value limits. Retirement calculators model each country's state pension system and tax-advantaged retirement accounts. State-level calculators for the US, Australia, Canada, and India incorporate regional income tax rates, minimum wage laws, and property tax rules.

Review Process

All financial data goes through a structured review process before publication:

1. Source Verification — Every tax rate, threshold, and contribution limit is traced to its official government publication (IRS revenue procedure, HMRC legislation, ATO ruling, etc.).
2. Cross-Reference — Rates are cross-referenced against at least two independent sources where available, including official government calculators and verified third-party references.
3. Calculation Testing — Each calculator is tested against known scenarios using published government examples or verified third-party calculations to confirm accuracy.
4. Peer Review — Data updates are reviewed by at least one additional team member before deployment to catch errors, omissions, or misinterpretations.
5. Post-Deployment Validation — After each update, calculators are re-tested with sample inputs to confirm the correct rates are applied and results are consistent with expected outcomes.

Update Process

Financial data is reviewed and updated at least annually following each country's budget cycle. Emergency updates are published within 48 hours of any unannounced rate changes. Each page displays the tax year it references, so you always know which rates are being applied.

Last updated: June 2026 — Data reflects current tax years.

Data Validation

Our data validation process ensures accuracy across all 7 countries:

• Automated Tests — Each calculator includes scenario-based tests that validate output against known expected values derived from official government examples.
• Tax Year Boundaries — When tax years change, all affected rates, thresholds, and limits are updated in a coordinated release to prevent mixed-year calculations.
• Regression Detection — Build-time validation compares current tax rates against previous values to flag unexpected changes that may indicate data entry errors.
• User Feedback Loop — Data correction reports from users are reviewed and validated against official sources before any adjustments are made.