As per the regulations, in any financial year, if your international purchase transactions (payments/spending) are more than Rs. 7 Lakhs, then a fee of 20% (as of 1st October 2023) will be charged on the amount exceeding Rs. 7 Lakhs (on the debits after the Rs. 7 Lakh limit is met). This charge is called TCS (Tax Collected at Source).
For multiple international transactions made in a day, the TCS is not deducted on every transaction but instead deducted at the end of the day on the total of all debits for the day.
TCS doesn't apply to Niyo SBM credit card which means you save 20% tax on international purchase transactions exceeding 7 Lakhs in a financial year.