Free business tools

GST invoices and calculators. No signup.

Generate GST invoices, salary slips, and rent receipts, or run tax and loan math in the browser. Built for Indian businesses first — use them as a guest.

Create an invoice Save invoices in TiBook

Free tools

GST & billing

Invoice Generator

Create professional invoices instantly. Generate PDF invoices with your business details, items, and pricing.

GST Calculator

Calculate GST with the new 5%, 18%, and 40% slabs. Split CGST, SGST, or IGST. Add or reverse GST. Free, no signup.

Income Tax Calculator

Calculate Indian income tax under Old and New regimes. Compare tax liability with deductions (80C, 80D, HRA). FY 2026-27.

Invoice Number Generator

Generate unique invoice numbers with custom formats. Create sequential or custom invoice numbers.

Service Invoice Generator

Create professional service invoices for your business. Generate detailed invoices for services rendered with GST.

VAT Generator

Generate VAT invoices with accurate tax calculations. Calculate VAT amounts and create professional VAT invoices.

Salary Slip Generator

Generate professional salary slips with gross earnings and deductions. Create detailed salary statements for employees.

Rent Slip Generator

Generate professional rent receipts for rental payments. Create printable rent slips with landlord and tenant details.

Business Card Generator

Design and generate professional business cards. Create printable business cards with your contact information.

Free tools

Loans & property

Mortgage Calculator

Calculate monthly mortgage payments, total interest, and amortization schedule. Includes PMI, property tax, insurance.

Amortization Calculator

Build a full loan amortization schedule. See principal, interest, and balance. Add extra payments to pay off early.

Mortgage Payoff Calculator

See how extra monthly, yearly, one-time, or biweekly payments shorten your mortgage and save interest.

House Affordability Calculator

How much house can I afford? Estimate from income and DTI (28/36, FHA, VA) or monthly budget.

Rent Calculator

How much rent can I afford? Estimate from income and debt using 25–33% or rent+debt rules.

Debt-to-Income (DTI) Calculator

Calculate front-end and back-end DTI from income and debts. Compare to 28/36, FHA, VA.

Refinance Calculator

Compare current vs refinanced loan. Monthly and interest difference, break-even. Points, costs, cash-out.

Rental Property Calculator

Cap rate, NOI, cash flow, CFROI, IRR. Purchase, loan, repairs, expenses, income, sell.

APR Calculator

Real APR including fees. General loan and mortgage. Loaned fees, upfront, points, PMI.

Why these tools exist

Guest tools for daily GST work. TiBook when you need the books.

Use the generators without an account. When you need saved invoices, stock, POS, and settlements, move to the free Startup plan.

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India GST

Turnover above ₹20 lakh (₹10 lakh in special-category states) generally needs GST registration and tax-ready invoices. E-invoicing applies above ₹5 crore.

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United States

Sales tax follows nexus rules. Clean invoices help with audits, deductions, and 1099s for contractors paid over $600.

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European Union

VAT invoices for B2B need VAT numbers, rates, and amounts. Thresholds vary by country; digital services may use OSS.