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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 Tools
View AllGST 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 Interest Calculator
Calculate Section 50 interest on delayed GST payments dynamically on a daily basis.
Income Tax Tools
View AllIncome Tax Calculator
Compare Old vs New Tax Regimes side-by-side with updated FY 2025-26 slabs.
Old vs New Tax Regime Calculator
Compare Old vs New Tax Regime instantly. Calculate deductions, HRA, NPS, and find which saves more.
Income Tax Slab Calculator
Calculate your taxable income and view slab-by-slab tax liability under Old and New Regimes.
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.
Salary Breakup Calculator
Structure CTC into basic, HRA, PF allowances to calculate monthly take-home income.
Capital Gains Tax Calculator
Calculate LTCG & STCG tax liabilities for property, shares, mutual funds, gold, and other assets.
Gratuity Calculator
Calculate employee gratuity u/s Payment of Gratuity Act 1972 and check tax-exempt limits.
EPF Calculator
Calculate employee provident fund balances, monthly VPF, and final retirement pension corpus.
PPF Calculator
Calculate Public Provident Fund maturity values, annual compound interest, and yearly growth projections.
SIP Calculator
Calculate mutual fund SIP returns, yearly step-up compounding, and inflation-adjusted corpus goals.
Investment Tools
View All80C Deduction Planner
Optimize tax-saving investments (PPF, ELSS, EPF, NPS) against the ₹1.5 Lakh limit.
Fixed Deposit Calculator
Calculate Fixed Deposit maturity values, compound interest earnings, and periodic non-cumulative payouts.
NPS Calculator
Calculate National Pension System retirement corpus, monthly annuity pension, and tax savings.
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.
How to Calculate NPS Returns in India (2026 Guide)
Learn how NPS returns are calculated, understand retirement corpus, annuity, tax benefits under Section 80CCD, and estimate your pension using GSTWaala's free NPS Calculator.
How to Calculate Fixed Deposit Interest in India (2026 Guide)
Learn how Fixed Deposit interest is calculated using simple and compound interest formulas. Includes worked examples, bank comparisons, taxation rules, FAQs, and free FD Calculator.
How to Calculate SIP Returns in India (2026 Guide)
Learn how SIP returns are calculated using mutual fund compounding. Understand SIP formulas, step-up SIP, wealth creation, inflation impact and use our free SIP Calculator to estimate future returns.
Frequently Asked Questions
Common inquiries regarding tax computations, calculations data safety, and invoice files.
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