Solar GST Update - Introducing the New 8.9% GST Slab

Platforms: 🌐 Web | 📱 Android | 🍎 iOS

The Government of India recently revised GST for the solar industry. MyBillBook now fully supports the new 8.9% effective GST rate across all platforms — allowing solar businesses to invoice with full compliance.

What’s New

We’ve added support for the 8.9% composite GST rate for solar goods + services.
This rate comes from the newly announced 70:30 rule:

• 5% GST on solar goods

• 18% GST on related services

• Applied using a 70% (goods) : 30% (services) split

• Results in an effective GST rate = 8.9%

Users can now select 8.9% GST directly from their tax settings while creating invoices.

The older 13.8% custom slab will continue to remain available for businesses still using it.

What is the value?

• Supports the latest solar GST structure announced by the government.

• No manual calculations or custom rate setup needed.

• Composite supply breakup remains consistent across invoices.

Who is this for?

• Solar EPC companies

• Installers & integrators

• Distributors & dealers

• Anyone selling solar goods bundled with services