---
type: "page"
title: "Methodology"
description: "How our calculators are built, how rates are sourced and kept current, and what “last verified” means on this site."
resource: "https://www.gstcalculators.in/methodology.html"
language: "en"
bundle_generated: "2026-10-12"
---

# Methodology

How our calculators are built, how rates are sourced and kept current, and what “last verified” means on this site.

- Canonical page: [Methodology](https://www.gstcalculators.in/methodology.html)
- Publisher: [Tool Master Hub / GSTCalculators.in](../site.md)
- Category: [About, Policies and Directories](../categories/site.md)

This is a discovery summary of the public page, not an independently reviewed replacement. Use the canonical page for current inputs, assumptions, formulas, source links and results. The bundle generation date does not mean that tax rules were reviewed on that date.

## Topics on the page

- Formula-Driven, Not a Black Box
- Browser-Only Processing
- One Source of Truth for Rates
- How Rates Are Kept Current
- Who Reviews Changes
- What "Last Verified" Means
- Known Simplifications
- What We Don’t Do
- Questions About a Specific Calculation

## Accuracy and corrections

[Methodology](https://www.gstcalculators.in/methodology.html) · [Editorial policy](https://www.gstcalculators.in/editorial-policy.html) · [Disclaimer](https://www.gstcalculators.in/disclaimer.html) · [Report a problem](https://www.gstcalculators.in/contact.html).