Sources and references
Links to the official bodies whose rules our calculators follow. Always confirm current figures at the source.
India: tax and indirect tax
- Income Tax Department: tax slabs, rebates and filing.
- Union Budget: yearly changes to tax rules.
- GST portal and CBIC GST: GST rules, rates and notifications.
India: banking, savings and investing
- Reserve Bank of India: lending and banking rules.
- National Savings Institute and India Post: small savings schemes such as PPF.
- AMFI and the SEBI Investor Website: mutual fund and investor education.
- PFRDA: National Pension System.
- Ministry of Labour and Employment: gratuity and labour rules.
United States
- Internal Revenue Service: tax and retirement account limits.
- Social Security Administration: benefits.
- Consumer Financial Protection Bureau: loans and credit.
Formulas
Most formulas are standard mathematics of interest and annuities. Each calculator page shows the formula it uses. See how our calculators work.