Frequently Asked Questions

To check HSN code for any product, you can use our free HSN/SAC Finder tool or integrate our API. Search by product keywords like "mobile phone", "laptop", or "consulting services" to find the correct HSN classification and GST rate.

Enter the HSN code in our free lookup tool or use our API endpoint. For example, enter "8517" to find GST rates for telephones. Our system will return the applicable GST rate (5%, 12%, 18%, or 28%) along with compensation cess if applicable.

Use our HSN/SAC Code Validator to check if a code is valid. Enter the full HSN (8 digits) or SAC (6 digits) code to verify its existence and get complete classification details including chapter, heading, and sub-heading information.

HSN (Harmonized System of Nomenclature) codes are 8-digit codes used to classify goods for taxation purposes. SAC (Services Accounting Code) codes classify services. GST rates in India are determined based on these codes. Our API helps you find the exact GST rate for any HSN/SAC code instantly.

The Tax Lookup API is a REST API that allows developers and businesses to search HSN/SAC codes, navigate hierarchical structures, and retrieve GST tax rates and cess information programmatically.

FastGST runs services that operates 24×7 on cloud infrastructure designed to streamline tax rate change detection, data ingestion, validation, and notification. We implemented state-of-the-art automated and manual process pipelines that continuously monitor official sources for tax updates and CBIC notifications. Automated workflows paired with human verification provides additional layer of validation to ensure best-effort data accuracy

Integration is simple! Sign up at FastGST ConsoleDesk, get your API key, and use our REST API endpoints. Check our API documentation for code examples in multiple programming languages.

Our REST API works with any programming language that can make HTTP requests. We provide code examples for JavaScript, Python, Java, C#, PHP, Ruby, and Go in our documentation.

Use our fuzzy search endpoint with product keywords. For example, search for "mobile phone" or "laptop computer" to find matching HSN codes. Our AI-powered search understands variations and synonyms for better results.

Yes, You can opt the limited free plan to test the API and ensure it matches your needs. If you need higher quotas you can always upgrade. To do that Signup in ConsoleDesk and create an account, then choose a plan, and finaly generate an API Key.

Free plan comes with daily and total limits. As long as you use within limits it's always free

ConsoleDesk is a centralised administration portal for managing your plans, API keys, billings, usage and more. You must register in ConsoleDesk and activate 'Tax lookup API' inorder to start using the service.

Signup/Login to ConsoleDesk, Activate 'Tax lookup API', Generate API Key, Use API Key to test API

Yes, All your account and billing details are managed in ConsoleDesk.

Yes, Your active plan and benifits will be lost and benifits of new plan will be applied from the same day to it's tenure.

FastGST currently operates without GST registration under Section 22 of the CGST Act. You can download standard non-GST invoices from ConsoleDesk for any payments you made

India has four main GST rate slabs: 5% (essential goods), 12% (standard rate goods), 18% (luxury and semi-luxury items), and 28% (luxury and demerit goods). Some items are exempted (0%) and others are under special rates. Use our API to find the exact rate for any HSN/SAC code.

Certain luxury goods attract compensation cess in addition to GST. Use our HSN lookup tool or API to check both GST rate and cess amount for any product. Cess rates vary by product category and are in addition to the base GST.

Our system automatically updates with the latest GST rate changes from CBIC notifications. The most recent updates include changes from the 56th GST Council meeting (effective September 2025). Check our API for real-time rate information.

We aggregate data from official CBIC and GST Council notifications, combined with automated and manual verification processes. While we strive for accuracy, users should verify all data against official government notifications for statutory compliance.

No. The services, API, and all related materials are provided on an "as is" and "as available" basis without warranties of any kind, whether express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement. FastGST.in does not provide professional tax advisory, legal counsel, or accounting services, and the information made available should not be construed as such. Users retain sole responsibility for ensuring compliance with applicable tax laws and regulations.