Each calculator also has its own dedicated page with a full explanation and FAQs:
Simple Interest = Principal × Rate × Time / 100.
Compound Interest = Principal × (1 + Rate/(100×n))^(n×Time) − Principal, where n is the compounding frequency per year.
Loan EMI uses the reducing-balance formula: EMI = P × r × (1+r)^n / ((1+r)^n − 1), where r is the monthly rate and n the number of instalments.
Mutual Fund (SIP) uses the standard SIP future-value formula assuming monthly compounding of the expected return.
PPF assumes annual contribution at the start of each year, compounded annually at the entered rate — the current PPF rate is prefilled but may change as per government notification.
Income Tax (Old vs New) compares your tax liability under both regimes for FY 2026-27, using the slabs applicable per Union Budget 2026 (unchanged from FY 2025-26): New Regime — ₹0-4L Nil, ₹4-8L 5%, ₹8-12L 10%, ₹12-16L 15%, ₹16-20L 20%, ₹20-24L 25%, above ₹24L 30%, with Section 87A rebate up to ₹60,000 for taxable income up to ₹12L. Old Regime — standard slabs of 5%/20%/30% above the age-based exemption limit, with Section 87A rebate up to ₹12,500 for taxable income up to ₹5L.
TDS shows the applicable rate and deduction for common payment types as per rates applicable for FY 2026-27. Threshold limits (below which TDS may not apply) vary by section and are not applied automatically here — please confirm applicability for your specific transaction.
HRA Exemption is the least of: HRA received, rent paid minus 10% of Basic+DA, or 50% (metro) / 40% (non-metro) of Basic+DA.
Salary/CTC to In-Hand gives an approximate monthly take-home after Employee PF, Professional Tax, and estimated income tax — actual figures depend on your employer's exact salary structure.
FD Calculator assumes quarterly compounding; TDS of 10% applies if annual interest exceeds ₹40,000 (₹50,000 for senior citizens), subject to PAN being furnished.
Capital Gains uses FY 2026-27 rates: Equity STCG (≤12 months) at 20%, Equity LTCG (>12 months) at 12.5% above ₹1.25L exemption; Property/Other LTCG (>24 months) at 12.5% flat, or 20% with indexation for property bought before 23 July 2024 (whichever is lower, using the official Cost Inflation Index).
Interest u/s 234A/234B/234C estimates simple interest at 1% per month (part month counts as full) for late filing, advance tax shortfall, and deferred instalments respectively — actual portal computation may vary slightly due to rounding conventions.
Advance Tax is payable in four instalments: 15% by 15 June, 45% (cumulative) by 15 September, 75% (cumulative) by 15 December, and 100% by 15 March.
Late Filing Fee (Section 234F): ₹5,000 if total income exceeds ₹5L, ₹1,000 if up to ₹5L, and Nil if below the basic exemption limit.
Depreciation supports both WDV (Written Down Value, reducing balance) and SLM (Straight Line) methods based on the rate you enter.
Gratuity = (15 × Last Drawn Salary × Years of Service) ÷ 26 for employees covered under the Payment of Gratuity Act, exempt up to ₹20 lakh under Section 10(10).
NPS projects your retirement corpus via monthly contributions, assuming 60% is withdrawn as a tax-free lump sum and 40% is annuitised at your assumed annuity rate.