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Verify HSN codes, estimate income tax liabilities, structure salaries, calculate loan EMIs, and generate professional invoices without logging in.
Popular Utilities
Frequently used calculators by small business owners and freelancers.
GST Calculator
Calculate GST addition or removal with splits for CGST, SGST, and IGST components.
Reverse GST Calculator
Extract original price before tax and verify vendor calculations from total bill amounts.
HSN Code Finder
Search from a comprehensive list of 150+ goods and services HSN/SAC codes and rates.
GST Invoice Generator
Build professional, compliant tax invoices and export them as clean business PDFs.
Financial Tools & Calculators
Search or filter from our suite of Indian compliance tools updated for AY 2026-27.
GST Calculator
Calculate GST addition or removal with splits for CGST, SGST, and IGST components.
Reverse GST Calculator
Extract original price before tax and verify vendor calculations from total bill amounts.
HSN Code Finder
Search from a comprehensive list of 150+ goods and services HSN/SAC codes and rates.
GST Penalty & Late Fee
Calculate filing delay late fees and daily Section 50 interest penalties at 18% p.a.
GST Invoice Generator
Build professional, compliant tax invoices and export them as clean business PDFs.
Income Tax Calculator
Compare Old vs New Tax Regimes side-by-side with updated FY 2025-26 slabs.
HRA Exemption Calculator
Find tax-exempt House Rent Allowance sums based on salary components and actual rent paid.
Advance Tax Calculator
Calculate quarterly installments and due amounts for tax liabilities exceeding ₹10,000.
80C Deduction Planner
Optimize tax-saving investments (PPF, ELSS, EPF, NPS) against the ₹1.5 Lakh limit.
Salary Breakup Calculator
Structure CTC into basic, HRA, PF allowances to calculate monthly take-home income.
Loan EMI Calculator
Calculate loan installments and view principal vs interest splits on Canvas charts.
TDS Calculator
Calculate withholding deductions for contract billing, rent, and professional fees.
Why Professionals Choose GSTWaala
GSTWaala is engineered to be a frictionless tax helper. We value your data security and user experience.
Accurate & Updated
Fully aligned with the latest Finance Acts and slabs in effect for FY 2025-26 (AY 2026-27).
100% Data Privacy
All calculations run locally in your browser. We never transmit or store your commercial figures.
No Signups / Logins
Instant access to all tools. We don't gate utilities behind paywalls or credential forms.
Mobile Optimized
Designed from the ground up for smartphones and tablets to make on-the-go calculations seamless.
Print & Export Ready
Print compliant tax invoices or copy formatted breakdowns into spreadsheets cleanly.
Zero Bloatware
Built on a static next-generation framework for fast load speeds under 2 seconds.
Latest Tax & Compliance Articles
Stay updated with regulatory changes, slab thresholds, and filing timelines in India.
Understanding Section 87A Tax Rebate in FY 2025-26
A comprehensive guide on how the updated Section 87A rebate wipes out tax liabilities up to ₹12 Lakh under the New Regime.
GST Late Fees & Penalties: GSTR-3B Filing Delay Guide
Learn how GSTR-3B late fees accrue daily, statutory maximum caps for Nil returns, and how Section 50 interest is calculated at 18% p.a.
How to Maximize Section 80C Deductions to Save Tax
A planner guide detailing options like PPF, ELSS, EPF, and the additional ₹50,000 NPS quota to optimize tax savings under the Old Regime.
Frequently Asked Questions
Common inquiries regarding tax computations, calculations data safety, and invoice files.
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