Your G-sec orders are collected and sent to the exchange. The exchange then blocks the necessary funds based on the following manner:
| Type of security | Unit multiplier | Value per unit (₹) | Minimum amount blocked (₹) |
| SDL | 100 | 105 | 10,500 |
| T-bills | 100 | 100 | 10,000 |
| G-sec | 100 | Decided by the exchange. | Decided by the exchange. |
The reserve amount blocked for G-secs is the estimated weighted average rate of all allotments to competitive bidders + accrued interest + markup value (difference between the lowest and highest bid).
The excess amount that remains after reducing the allotment amount from the blocked amount is credited to your Zerodha account.