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Methodology

How beMyCalc builds, tests, and documents all 123 calculators — formulas, data sources, and assumptions.

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Calculations run in your browser

When you move a slider or type an amount, the math runs locally in your browser. We do not send loan balances, salaries, or investment amounts to our servers. Share links encode your inputs in the URL so you can bookmark or send a scenario — treat shared URLs like any link that contains personal numbers.

Standard formulas

Most tools use widely published financial math: reducing-balance EMI amortization, compound interest, SIP future value, CAGR, present/future value, and similar textbook formulas. Below you'll find every calculator with its formula and a link to the live tool. Each calculator page also has a "How we calculate" panel with the same equation.

India tax & government schemes

India income tax, HRA, and regime-compare tools use slab rates and deductions documented for FY 2024-25 (AY 2025-26). PPF, NPS, SSY, NSC, and similar scheme calculators let you enter the notified interest rate — we do not hard-code a single live government rate unless the tool explicitly states one as a default example.

Scheme limits (80C cap, PPF yearly maximum, etc.) follow commonly cited rules at the time of the last review. Indian rules change in Union Budgets and notifications — always confirm with the Income Tax portal, EPFO, or your chartered accountant before filing or investing.

Currency exchange rates

The currency converter fetches indicative mid-market rates from the Frankfurter API (European Central Bank reference data), cached for about an hour. Banks and card networks apply their own spreads and fees — use the exchange calculator to model fees separately.

Worked examples & guides

Calculator pages show sample scenarios (e.g. ₹10L loan at 8.5% for 20 years). These are illustrations to explain the tool, not recommendations. Guides on /guides link to calculators so you can replace example numbers with your own.

How we update tools

  • India tax slabs and standard deductions when a new financial year is notified.
  • Default example rates when major scheme notifications change.
  • Formula bugs reported via contact or on-page "Report an issue" links.
  • New calculators when user demand and formula clarity justify a dedicated tool.

Report an error

Found a wrong formula, outdated slab, or broken share link? Use our contact form with the calculator URL and your expected result.

See also: About beMyCalc · Disclaimer

All calculator formulas

7 tools in Retirement — showing 1–7

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All calculators (123)India tax & schemes (18)Investment (13)Loans (14)Interest (2)Deposits (8)Retirement (7)Returns (4)Salary & Payroll (9)Tax (8)Property & Real Estate (5)Trading & Investing (11)Business (4)Currency (2)Budgeting & Planning (3)Health & Wellness (5)Converters (13)Everyday Tools (15)
APY CalculatorRetirementIndia

Monthly contribution from PFRDA APY chart by entry age and pension slab; pension starts at 60; nominee corpus per slab

Select your entry age (18–40), desired guaranteed monthly pension (₹1,000 to ₹5,000), and payment frequency. Contribution amounts follow the official PFRDA APY chart.

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EPF CalculatorRetirementIndia

Monthly employee + employer PF contributions compounded at EPF rate: FV = SIP formula on combined monthly deposit

Enter your monthly employee PF contribution, employer match (%), expected EPF rate, and years of service. Corpus is projected using monthly compounding on combined contributions.

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FIRE CalculatorRetirement

FIRE number = annual expenses × 25; years to FIRE from savings rate and expected investment return

Based on the 4% rule: FIRE number = annual expenses × 25. Enter savings rate to estimate years to FIRE.

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Inflation CalculatorRetirement

Future value = Present value × (1 + inflation rate)^years; purchasing power erodes as prices rise

Enter current amount, inflation rate, and number of years to see future value equivalent and purchasing power loss.

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NPS CalculatorRetirementIndia

Corpus = FV of tier-1 contributions compounded at assumed return; annuity income = corpus × annuity rate

Enter monthly NPS contribution, expected return, current age, and retirement age to estimate corpus and annuity pension.

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NPS vs PPF vs EPF CalculatorRetirementIndia

NPS and EPF corpus from monthly compounding; PPF from yearly deposits; all projected to the same retirement horizon

Enter monthly contribution, rates, age, and employer EPF match. NPS and EPF use monthly compounding; PPF uses yearly deposits up to your chosen amount.

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Retirement CalculatorRetirement

Corpus = FV of current savings + FV of monthly SIP; required corpus ≈ annual expenses × 25 (4% rule variant)

Enter current age, retirement age, monthly expenses, inflation rate, and expected returns to calculate required retirement corpus.

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