Free Online Calculators

An EMI is a fixed monthly payment, but what it is made of changes every month. Early payments are mostly interest and barely reduce the principal; later payments are mostly principal. On a 20-year home loan, roughly the first seven years of payments go predominantly to interest, which is why the outstanding balance falls so slowly at the start and why prepaying early is disproportionately effective.

Two numbers matter more than the EMI itself. The total interest over the full tenure is what the loan actually costs, and extending a tenure to reduce the monthly figure can add years of interest for a small monthly saving. The rate type decides whether the figure holds: a floating rate loan re-prices when the benchmark moves, so today's EMI is an estimate, and lenders usually absorb a rate rise by extending the tenure rather than raising the payment, which quietly increases the total cost.

An SIP calculator compounds a fixed monthly investment at an assumed annual return. The arithmetic is exact; the assumption is not. Equity returns are not delivered in smooth annual instalments, and the order in which good and bad years arrive changes the outcome even when the average is identical.

Use the projection for the thing it is genuinely good at, which is showing the shape of compounding — how much of the final figure comes from contributions versus growth, and how sharply that ratio shifts the longer the horizon. Over 20 years, growth typically exceeds total contributions by a wide margin, which is the argument for starting early stated in numbers. Treat the final figure as one scenario, run it again at a return two or three points lower, and plan against the lower one. Also remember it is a pre-tax, pre-inflation number: a projection in today's rupees overstates what the money will buy in twenty years.

The most frequent GST error is treating an inclusive price as an exclusive one. Adding 18 percent GST to 1,000 gives 1,180. Removing 18 percent GST from 1,180 is not subtracting 18 percent of 1,180, which would give 967.60 and is wrong. The base is the total divided by 1.18, so the tax component of 1,180 is exactly 180.

The other detail that matters on an invoice is the split. GST is levied as CGST plus SGST when the supplier and the customer are in the same state, and as IGST when they are in different states. The total is identical either way, so 18 percent is either 9 percent CGST plus 9 percent SGST, or 18 percent IGST. Getting the split wrong does not change what the customer pays but does affect input credit for a business customer, which is why invoices are rejected over it.