GST (Goods and Services Tax) can be charged on interest in most jurisdictions, but the treatment depends on the specific context and local tax rules. In India, for example, GST is generally applicable to interest charged on loans and advances provided by financial institutions and money lenders. Banks and financial entities typically charge GST at the applicable rate (currently 18% on most financial services) on top of the interest amount. However, certain categories may have exemptions or reduced rates—for instance, interest on deposits with banks may be treated differently than interest on loans. For services like credit card interest or personal loan interest, GST is usually charged. The key principle is that interest is often treated as a "financial service" under GST frameworks, making it taxable. That said, the exact rules vary significantly by country. In some jurisdictions, interest income may be subject to income tax but not consumption-based taxes like GST. It's essential to check local tax authority guidelines, as specific exemptions and conditions apply. Businesses and financial institutions must comply with their jurisdiction's regulations regarding when and how to charge GST on interest, including proper documentation and filing requirements. If you're involved in lending or borrowing, consulting with a tax professional familiar with local regulations ensures correct compliance and helps avoid penalties.