How We Calculate
Every rupee figure on this site comes from one of two places: a stated assumption put through a formula, or a published number with a date and a source. This page lists both, so any figure can be checked.
The default assumptions
Unless a page says otherwise, calculations use:
| Assumption | Value | Why this number |
|---|---|---|
| Equity return, before costs | 12% a year | Roughly what diversified Indian equity has returned over long periods. Not a forecast: individual ten-year periods have been well above and well below it. |
| Inflation | 6% a year | Close to India's long-run consumer inflation. Education and healthcare are assumed at 8–10% where a page says so. |
| Compounding | Monthly | Returns are applied each month at the annual rate ÷ 12. |
| SIP timing | Start of each month | Each instalment earns that month's return. |
| Tax | FY 2026-27 rates plus 4% cess | Surcharge is ignored unless stated, because it applies only to incomes above ₹50 lakh. |
| Fund costs | Deducted from the return | A 0.5% expense ratio on a 12% return is modelled as 11.5%. |
Where a page uses different figures, it states them next to the calculation.
The formulas
A monthly SIP of P for n months, with a monthly rate r (annual rate ÷ 12):
A lump sum L for t years at annual rate R:
Today's cost C of a goal, grown at inflation i for t years:
A fund that pays spending S at the start of each year for t years, the spending rising at inflation i and the balance earning R:
Step-up SIPs apply the SIP formula year by year, raising the monthly amount at the start of each year. Tax-harvesting figures simulate every year of a SIP and treat harvested gains as long-term. The pages that use this say it is an approximation.
The site's SIP calculator, compound interest calculator and term insurance cover calculator use the same formulas, so you can reproduce any figure with your own inputs.
Where company and market data comes from
| Data | Source | Notes |
|---|---|---|
| Quarterly results | The company's own filing to NSE, read from the XBRL it submitted | Consolidated where the company files consolidated figures. Constant-currency growth and deal wins come from the company's press release, because they aren't in the filing. |
| Analyst estimates | A named poll or brokerage, linked beside each table | India has no free official consensus figure, and different polls ask different analysts. |
| Company financials | Screener.in, from companies' annual reports | Consolidated figures. Screener groups balance-sheet lines into broad heads, so the annual report shows more detail under the same totals. |
| Share prices, PE, ROE | Screener.in | Taken on the date shown on the page. Prices change every trading day. |
| Index valuation (Nifty 50 PE) | NSE, via index valuation trackers | Several trackers publish slightly different readings for the same week. The page gives the range. |
| Tax rules | Income-tax Act and Union Budget announcements | Checked after each Budget. |
| Mutual fund rules | SEBI regulations and circulars | Including the expense-ratio framework in force from 1 April 2026. |
Quarterly results
Every figure in a results table is computed from the filing, never copied from a headline or press release. Three definitions do most of the work:
- Operating profit is revenue less every expense except interest. It leaves out other income and exceptional items. For a bank it is profit before provisions; for a non-bank lender, profit before exceptional items and tax, because interest is a lender's main cost.
- Profit to shareholders is profit after tax less the share belonging to minority owners of subsidiaries.
- n.m. (not meaningful) replaces a percentage change whenever the earlier figure was zero or negative, or the latest one is a loss. Exceptional items show the amounts with no percentage change between them.
The weekly roundup covers Nifty 500 companies that filed results that week. A result passes the screen when, against the same quarter a year earlier:
- revenue (net interest income, for a bank) is up at least 10%;
- operating profit is up by more than revenue, so margins widened; and
- none of these is true:
- the year-ago operating profit was below 5% of year-ago revenue, too small a base to grow from;
- exceptional items were more than 10% of profit before tax, this quarter or a year ago;
- other income was more than a quarter of profit before tax;
- revenue rose more than 50%, until the filing has been read for an acquisition;
- one quarter is consolidated and the other standalone;
- the number of shares rose more than 10%, beyond any split or bonus, so the growth was partly bought with new capital;
- for a bank, other income rose more than 50%, which is usually a gain on bonds or on a stake it sold.
Passing companies are ranked by operating profit growth. Beside each one, quarters of growth counts back from the latest quarter: how many in a row, of the last four, had operating profit above the same quarter a year earlier. It isn't part of the screen; it separates a steady grower from a one-quarter spike. The top of the list is then read against the filing by hand before it is published. Insurers file in a format this screen doesn't read, so they aren't covered. Passing the screen says a quarter was strong. It is not a view on the share.
What "figures checked" means
Every guide shows the date its figures were last checked against their sources. A page is checked again:
- after every Union Budget, for pages with tax rates;
- after companies publish annual results, for pages using company financials;
- at least once a year for everything else.
A script in the site's code lists every page whose check date has run past its refresh period, so a stale page gets noticed instead of left to drift.
What a figure is, and what it is not
- An illustration of arithmetic. "₹10,000 a month for 20 years at 12% becomes ₹1 crore" is exact arithmetic on stated inputs. Real returns will differ, possibly by a lot.
- A dated fact. "TCS closed at ₹2,082 on 25 September 2026" was true on that date. It is not a price target or a view on the share.
- Never a recommendation. Companies and funds are named to make an example concrete. None of them has paid to be mentioned. See About.
Found a figure that doesn't reproduce? Tell me, with the page and the number.