Finance Calculators

These calculators cover borrowing, saving and the Indian tax and statutory-benefit rules that determine what actually reaches your account. Several of them are country-specific: GST, TDS, HRA, PPF, NPS and gratuity follow Indian regulations, and the rates involved change with most budgets.

Borrowing

The Loan and EMI Calculators both use the standard amortisation formula, producing a level monthly payment whose split between interest and principal shifts over time. The behaviour that surprises people is how little of an early payment reduces the balance — on a 25-year mortgage the first payment can be roughly two-thirds interest, because interest is charged on the outstanding balance, which is at its highest at the start. That is also why overpayments early on save disproportionately.

Saving and investing

Compound Interest is the general case; SIP, FD, RD, PPF and NPS apply it under specific product rules. Two things are worth internalising. Compounding frequency matters far less than the rate and the time — £10,000 at 6 percent for a year returns £600 compounded annually and £618 compounded daily. And every figure these tools produce is nominal: subtract inflation for real purchasing power, and remember interest is usually taxable in the year it accrues.

Tax and salary

Income Tax, TDS, HRA, Salary Breakup, Gratuity and GST model statutory calculations. The recurring theme is that headline numbers mislead: your CTC includes employer contributions you never receive as cash, and slabs are progressive, so moving into a higher band taxes only the portion above the threshold — never your whole income.

Treat all of these as planning tools. For a filing decision, confirm against the current year's rules or a professional.