Every calculator, comparison and decision tool on FinanceAcademy is built on explicit mathematical models and regulatory frameworks. This page documents how our tools work and the standards they are held to.
Financial outcomes are largely calculable. Where a reliable mathematical model exists, FinanceAcademy uses it instead of editorial judgment. Our tools compute — they do not recommend based on undisclosed assumptions or editorial bias.
Every tool documents its underlying formula or framework. Where inputs involve projections (expected return rates, inflation estimates), those assumptions are surfaced to the user as adjustable parameters, not hidden constants.
"If a financial question can be modelled, we model it. Transparency about methodology is a prerequisite for trust."
All calculators on FinanceAcademy follow a four-stage build standard:
The primary formulas underlying our most-used tools:
| Tool | Formula / Method | Standard |
|---|---|---|
| EMI Calculator | EMI = P × r × (1+r)ⁿ / ((1+r)ⁿ - 1) where r = monthly rate, n = months | Reducing balance, per RBI guidelines |
| SIP Returns | FV = P × ((1+r)ⁿ - 1) / r × (1+r), monthly compounding | AMFI standard SIP formula |
| XIRR | Newton-Raphson iterative solution for IRR with irregular cash flow dates | AMFI, SEBI fund performance reporting |
| Income Tax | Progressive slab computation, standard deduction, section-wise deductions | Finance Act 2024, CBDT notifications |
| PPF Maturity | Compound interest at 7.1% p.a., annual compounding, interest calculated on minimum balance 5th–last working day of month | PPF Scheme 2019, GoI rules |
| NPS Corpus | Monthly contributions compounded at asset-class expected returns, with 60/40 tax treatment at maturity | PFRDA regulations |
| Capital Gains Tax | LTCG at 12.5% (equity, post-₹1.25L exemption), STCG at 20%, with indexation for debt assets where applicable | Finance Act 2024, Budget 2024 |
| HRA Exemption | Minimum of: (a) actual HRA received, (b) rent paid minus 10% of basic, (c) 50% of basic (metro) or 40% (non-metro) | Section 10(13A) Income Tax Act |
Comparison tools on FinanceAcademy compare financial products and options on quantifiable criteria — interest rates, premium amounts, lock-in periods, tax treatment, historical returns and regulatory features. The methodology is:
FinanceAcademy's behavioural tools — emotional investing analyser, spending discipline score, risk panic predictor and others — use structured scoring frameworks derived from established behavioural finance research.
Questions are designed to elicit behavioural responses aligned with documented biases — panic selling, performance chasing, loss aversion, present bias and social comparison spending. Scoring weights reflect the empirical cost of each bias to long-term financial outcomes as documented in academic and industry research.
All scores are indicative diagnostic tools, not clinical assessments. They are designed to surface patterns that a user may not have recognised, not to make definitive judgments about financial personality.
Financial calculations on this platform are estimates based on inputs provided and standard formulas. They do not account for individual circumstances that a qualified financial adviser would consider — risk capacity, tax situation complexity, family dynamics or regulatory changes that occur after a tool was last updated. All outputs should be treated as analytical starting points, not definitive financial projections. Always verify critical calculations with a qualified financial professional.
Use the tools — every formula and assumption is visible within each calculator.