How we build our calculators
Every calculator on CoinMindruns on the published, standard formula for that calculation — for example, the future-value formula for SIPs, the reducing-balance formula for EMIs, and the official income-tax slabs for the current financial year. The maths runs privately in your browser; we don't guess or approximate. Where a calculator shows a worked example, the numbers come from the same formula the tool uses, so the example and the calculator never disagree.
The sources we check against
Rates and rules change, so we verify our figures against primary, official sources rather than second-hand blogs:
- Reserve Bank of India (RBI) — repo rate, banking and small-savings rules.
- Income Tax Department, Govt. of India — tax slabs, deductions and rebates.
- AMFI — mutual fund and SIP data.
- EPFO — EPF interest and contribution rules.
- SEBI — investor-protection and market rules.
- National Savings Institute / India Post — PPF, NSC and post-office scheme rates.
How our guides are written and reviewed
Our guides are researched from primary sources, written in plain English, and reviewed for factual accuracy before publishing. We use AI to help with research and first drafts — as many modern publishers do — but a person edits, fact-checks and approves every page. We do not publish thin, auto-generated pages: if a page doesn't add something genuinely useful, we don't ship it.
When we update pages
Tax slabs, interest rates and scheme rules are reviewed whenever the government or RBI announces a change — for example, around the Union Budget and RBI monetary-policy meetings — and the affected calculators and guides are updated promptly.
Educational, not financial advice
Everything on CoinMind is educational information to help you understand your options. It is not personalised financial, tax or investment advice, and we are not a SEBI-registered adviser. For a decision that materially affects your money, confirm the current figures and consider speaking to a qualified professional. See our full disclaimer.
Corrections
If you spot something that looks wrong, please tell us at hello@coinmind.in — we check every report and fix genuine errors quickly. You can read more about who we are on our About page.