CUSPA is like a temporary holding area for shares you have bought but haven't fully paid for. When your account goes into negative balance after purchasing stocks, those shares automatically get pledged as collateral until you clear the outstanding amount.

What is CUSPA in simple terms?

Think of CUSPA as your broker's way of securing unpaid purchases. If you buy shares worth ₹1,00,000 but only have ₹90,000 in your account, the purchased shares automatically move to CUSPA and stay pledged until you pay the remaining ₹10,000.

Important - This happens automatically. One doesn’t choose to pledge these shares like regular margin pledging.

How CUSPA works with examples

Scenario 1 - Small shortfall You buy 100 shares at ₹1,000 each (₹1,00,000 total). After adding brokerage and charges, your bill becomes ₹1,01,000. You have exactly ₹1,00,000, creating a ₹1,000 shortfall.

Result - Shares worth ₹1,500 (₹1,000 × 150% buffer) get auto-pledged under CUSPA.

Scenario 2 - Full amount unpaid You buy ₹1,00,000 worth of shares using only margin pledge value with zero cash balance. Your account goes negative by the full ₹1,01,000 (including charges).

Result- All purchased shares (₹1,00,000 worth) get auto-pledged under CUSPA.

CUSPA vs. Regular Margin Pledge

Regular Margin Pledge - You voluntarily pledge your existing shares to get trading margin for F&O, commodities, or equity trading.

CUSPA auto-pledge - The system automatically pledges your newly purchased shares because you haven't paid for them fully.

The difference is choice. Regular pledging is your decision, while CUSPA happens automatically for unpaid or partial paid purchases.

Settlement timeline and deadlines

7-day pledge period - Your auto-pledged shares stay locked in CUSPA for 7 days from the trade date.

T+5 payment deadline - You must clear the outstanding amount within 5 days after the trade date to avoid auto-selling.

Auto-release timing - Shares get automatically released anytime after 7 working days from settlement, provided you've paid the dues.

Charges you need to know

Auto-pledge charges- ₹50 + GST when shares move to CUSPA

Auto-unpledge charges- ₹50 + GST when shares are released after payment

These charges apply regardless of the transaction size, so factor them into your trading costs.

What happens if you don't pay?

If you don't clear the outstanding amount within T+5 days, your broker may auto-sell the pledged shares to recover the unpaid amount. This protects both you and the broker from further losses due to market fluctuations.