Free tools
Eleven calculators we built for our own clients
The calculations we run week to week, made free and public. No sign-up, no email wall, and nothing you type ever leaves your browser.
Compliance
GST and TDS — the recurring monthly work.
GST Calculator
Add or remove GST at any slab, and see the CGST/SGST or IGST split for intra- and inter-state supply.
Open calculator →GST Applicability Checker
Enter your turnover and see which GST rules apply: QRMP, e-invoicing and its 30-day limit, HSN digits, GSTR-9 and 9C, and late fee caps.
Open calculator →GST Invoice Generator
Build a GST-compliant tax invoice with the tax head applied automatically from the place of supply, then print it or save it as a PDF.
Open calculator →GSTIN Validator
Verify a GSTIN’s check digit and decode the state, the PAN inside it and the entity type — before a wrong number costs you input credit.
Open calculator →TDS Calculator
TDS for tax year 2026-27 under section 393 of the Income-tax Act, 2025, for payments formerly under 194C, 194J, 194I, 194H, 194A and 194Q, with the no-PAN rate.
Open calculator →GST Late Fee & Interest
The late fee, capped by your turnover, and 18% interest on a GST return filed after its due date.
Open calculator →GST & TDS Due Date Calendar
Every recurring GST and TDS deadline, with a live count of the days left on each.
Open calculator →Cash & margin
The numbers that decide whether the business is actually working.
Cash Runway & Burn
How many months of cash you have left at your current burn, and what changes if you cut costs or raise.
Open calculator →Break-Even Calculator
Break-even in units and revenue, contribution margin, and how far sales can fall before you lose money.
Open calculator →Working Capital & CCC
Working capital, the current ratio, and your cash conversion cycle in days.
Open calculator →Margin & Markup Calculator
Convert between margin and markup, and price correctly from a target margin — the arithmetic most businesses get backwards.
Open calculator →Depreciation Calculator
A year-by-year depreciation schedule under SLM or WDV, with residual value and the 180-day rule.
Open calculator →Free Excel templates
.xlsx · free
Monthly MIS Report Template
P&L against budget, cash by month, receivables ageing and KPIs.
.xlsx · free
13-Week Cash Flow Forecast Template
Week-by-week receipts and payments, with a buffer that turns red.
.xlsx · free
Bank Reconciliation Template
Books to bank by type of difference, with ageing of open items.
Need a definition rather than a calculation? The finance, GST and TDS glossary defines them in plain English.
These are estimation tools, not tax advice. Rates, thresholds and due dates change, and your circumstances may differ — check anything material with your adviser before you act on it.
Serving businesses across India
Want the numbers behind the calculator?
These tools answer one question at a time. A monthly reporting pack answers the ones you haven’t thought to ask yet.
Delivered within 24 working hours, or next month is on us. 24 working hours from the moment we have your complete data. The clock runs Monday to Saturday and pauses on Sundays and public holidays. Terms