Free GST & Finance
Calculators
Instant calculators for Indian businesses and CA firms — no limits, no sign-up required.
GST Calculator
Calculate GST amount instantly from taxable value, or reverse-calculate from GST-inclusive amount. Supports all GST rates: 0.25%, 3%, 5%, 12%, 18%, 28%.
GST ITC Set-off Calculator
Calculate optimal ITC utilization across IGST, CGST & SGST to minimize your cash GST payment. Follows Section 49A and Rule 88A.
AMB / AQB Calculator
Calculate your average monthly or quarterly bank balance from your bank statement. See your average balance and any shortfall instantly.
GST Late Fee & Interest Calculator
Calculate the late fee and 18% interest on a delayed GSTR-3B or GSTR-1, with turnover-based maximum caps. Enter due date, filing date and tax payable.
GSTIN Validator & Decoder
Check whether a GST number is valid by format and checksum, and decode the state, PAN and taxpayer type instantly in your browser.
HSN / SAC Code & GST Rate Finder
Search a product or service to find its HSN/SAC code and GST rate across the 0%, 5%, 12%, 18% and 28% slabs for common goods and services.
GST Invoice Generator
Create a GST-compliant tax invoice with HSN/SAC codes and CGST/SGST or IGST, then save it as a PDF from your browser. No sign-up required.
TDS Calculator
Calculate the TDS to deduct on contractor, professional, rent, commission, interest and dividend payments at FY 2025-26 section rates, with thresholds and the no-PAN 20% rule.
HRA Exemption Calculator
Work out how much House Rent Allowance is tax-exempt under Section 10(13A) using the least-of-three rule. Enter your salary, HRA and rent.
Advance Tax Calculator
Estimate your advance tax for FY 2025-26 under the new or old regime and see how much to pay by each due date (15 Jun, 15 Sep, 15 Dec, 15 Mar).
Salary Calculator (CTC to In-hand)
Break your annual CTC into monthly take-home pay — basic, HRA, PF, gratuity, professional tax and income tax, estimated for FY 2025-26.
Rent Receipt Generator
Generate rent receipts for your HRA claim in seconds — fill the details, create monthly receipts and save them as a PDF. Free and private.
TDS Interest Calculator
Calculate interest on late deduction (1% per month) and late deposit (1.5% per month) of TDS under Section 201(1A).
Depreciation Calculator
Calculate depreciation under the Income Tax Act (WDV block rates) or the Companies Act (Schedule II useful life), using the SLM or WDV method.
Free online calculators for Indian businesses and CA firms
Finexo's calculators help business owners, accountants, and CA firms get quick, accurate numbers without spreadsheets or manual formulas. Every tool runs instantly in your browser, is completely free, and needs no sign-up. The figures you enter stay on your device.
Use the GST Calculator to add or remove GST from any amount across all Indian GST rates. The GST ITC Set-off Calculator works out the optimal way to utilise input tax credit across IGST, CGST, and SGST so you pay the least possible GST in cash, following Section 49A and Rule 88A. The AMB / AQB Calculator computes your average monthly or quarterly bank balance from your statement and flags any shortfall against the required minimum.
Frequently asked questions
Are these calculators free to use?
Yes. Every calculator on Finexo is completely free, with no limits on how many times you can use it and no sign-up required.
Do I need to create an account or log in?
No. The calculators work instantly in your browser without any login, registration, or download.
Is the data I enter safe?
Yes. All calculations run locally in your browser. The numbers you type are not uploaded or stored on any server.
Who are these calculators for?
They are built for Indian business owners, accountants, and CA firms who need quick, reliable GST and finance calculations for day-to-day compliance and bookkeeping work.