Finance Guides
Salary, tax, GST, and loan math — the formulas behind the numbers, with worked examples you can verify.
Salary breakdowns, income tax, GST, mortgage amortization, and EMI calculations — the finance guides explain the formulas behind the numbers so you can verify what a calculator tells you and understand the assumptions it makes. Each guide includes worked examples you can check by hand.
Financial calculators are useful starting points, but they're estimates. These guides explain where the estimates come from, what they assume, and when you should seek professional advice. Every tool runs locally in your browser so your financial data never leaves your device.
Finance Guides — Guides & Tutorials
3 guides covering practical workflows, examples, and best practices.
How Mortgage Amortization Works and When Extra Payments Help
Your early EMI payments are almost all interest — that's amortization, and understanding it is the key to deciding whether prepayment actually saves you money.
GST Inclusive vs Exclusive Pricing Explained
Is the price on the tag before or after tax? Here's how inclusive and exclusive GST pricing differ, how to convert between them, and which one your invoice should use.
CTC vs Gross Salary vs In-Hand Salary Explained
Job offers quote CTC, your payslip shows gross, and your bank shows in-hand. Here's how the three connect, what gets deducted, and how to compare offers honestly.
Finance Tools
Free tools that run entirely in your browser — no sign-up, no uploads, no limits.
Global Salary Calculator
Calculate salary, in-hand pay, taxes, CTC, gross-to-net income, retirement contributions, and compare job offers across multiple countries.
Income Tax Calculator
Calculate your income tax in India, USA, UK, Germany, France, and 6 more countries. Federal tax plus social security (FICA, National Insurance, CSG/CRDS) with tax credits — and optional US state tax for 13 states.
GST Calculator
Calculate GST instantly — inclusive, exclusive, reverse GST, CGST, SGST & IGST splits, bulk invoice breakdowns, discounts, shipping and round-off. Free, private, browser-only.
EMI Calculator
Calculate loan EMI instantly — monthly payment, total interest, total cost, full amortization schedule, prepayment savings and CSV export. Free, private, browser-only.
Mortgage Calculator
Calculate mortgage payments, interest, taxes, insurance, and generate a full amortization schedule with interactive charts and what-if analysis.
Invoice Generator
Create professional invoices online for free — business & client details, line items, taxes, discounts, currencies, templates, and PDF download. 100% browser-based, no signup.
Finance Guides — Frequently Asked Questions
Common questions about finance guide on ForgePlug.