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Assumptions changelog

The tools depend on prices, rates and rules that change. This page lists every value they use, where it comes from and when it was checked. Values marked "Not verified" are not used until they are checked; the tools ask you for your own figure instead.

Changes

  1. Added the PPF rate (7.1%), deposit limits and term from the National Savings Institute, and the one-year holding period for equity, for the SIP vs PPF vs FD tool.

  2. Added capital-gains rates (12.5% long-term, ₹1.25 lakh yearly exemption on equity gains, 20% short-term on equity) from PIB and CBDT, for the plot vs FD vs mutual funds tool.

  3. Added income-tax slabs, standard deduction, rebate and cess for tax year 2026-27 (both regimes, under 60), from the Income Tax Department and CBDT, for the tax regime tool.

  4. Set Lucknow CNG to ₹107.00 a kg (Green Gas Limited, from 3 Oct 2026) and Lucknow petrol to ₹101.86 a litre (19 Oct 2026).

  5. Added UP stamp duty and registration for the rent vs buy tool, as a placeholder (not verified).

  6. Added the UP domestic electricity tariff and rooftop solar subsidy, generation, degradation and export credit, as placeholders (not verified).

  7. Set the default scenario table (inflation, equity return, home prices, rent, fuel and electricity prices) and the 9% default rate on the extra car price, from the project spec.

Every value in use

AssumptionValueSourceAs of
Petrol, Lucknow101.86 ₹/LLucknow retail price on 19 Oct 2026: ₹101.86 a litre in Goodreturns, BankBazaar and Business Today (goodreturns.in/petrol-price-in-lucknow.html). Indian Oil publishes city prices only by SMS (RSP 155054 to 92249 92249) and its app. Changes daily at 6 am; check at your pump.2026-10-19
CNG, Lucknow107 ₹/kgGreen Gas Limited, the city gas distributor for Lucknow (gglonline.net/cng-price): Rs 107.00/kg w.e.f. 6:00 hrs 03.10.2026.2026-10-03
Fuel prices, other cities: Kanpur, Noida, Ghaziabad, Agra, Varanasi, Prayagraj—Not verifiedoil marketing company / city gas distributor retail price2026-10-19
UP domestic tariff—Not verifiedUPERC tariff order in force (domestic urban metered category): energy slabs, fixed charge per kW, electricity duty2026-10-19
Rooftop solar subsidy—Not verifiedPM Surya Ghar central subsidy for residential rooftop solar, plus any UP state top-up2026-10-19
Generation per kW per day—Not verifiedaverage daily output per kW for UP (e.g. MNRE or PVWatts estimate)2026-10-19
Panel output lost each year—Not verifiedpanel manufacturer's performance warranty2026-10-19
Credit per unit exported—Not verifiedUPERC net-metering regulation (credit for units exported to the grid)2026-10-19
UP stamp duty and registration—Not verifiedUP stamp duty and registration fee for residential property (IGRSUP)2026-10-19
Interest on the extra price (default)9%Project spec default for interest on the extra car price; user-editable2026-10-19
Home loan rate (default)—Not verifiedtypical home-loan rate, cite bank or RBI data2026-10-19
Fixed deposit rate (default)—Not verifiedtypical bank FD rate, cite bank or RBI data2026-10-19
Inflation a year (pessimistic / base / optimistic)7% / 6% / 5%CapitalVerdict default assumption from project spec; user-editable, not a forecast2026-10-19
Equity return a year, before tax (pessimistic / base / optimistic)7% / 10% / 12%CapitalVerdict default assumption from project spec; user-editable, not a forecast2026-10-19
Home price growth a year (pessimistic / base / optimistic)3% / 5% / 7%CapitalVerdict default assumption from project spec; user-editable, not a forecast2026-10-19
Rent increase a year (pessimistic / base / optimistic)7% / 5% / 4%CapitalVerdict default assumption from project spec; user-editable, not a forecast2026-10-19
Fuel and electricity price rise a year (pessimistic / base / optimistic)0% / 3% / 5%CapitalVerdict default assumption from project spec (fuel/tariff rise); user-editable, not a forecast2026-10-19