Security Deposit (SD)

Security Deposit (SD) is the portion of each Running Account (RA) Bill payment withheld by the government during contract execution as financial security for contractor performance. Typically deducted at 2.5 to 5 percent from each bill, the accumulated SD is held until after the Defect Liability Period expires and all final accounts are settled, then released to the contractor.

What is Security Deposit in government procurement?

The Security Deposit serves as the government's ongoing financial security against contractor default during execution. Unlike the Performance Bank Guarantee (PBG), which is a single instrument submitted at contract signing, the SD is built up progressively through deductions from each RA Bill.

As the contractor submits RA Bills for work completed, measured and certified by the government engineer, the government's accounts wing withholds a fixed percentage (2.5 percent in CPWD contracts, 5 percent in some state PWD contracts) before paying the balance. This withheld amount is the Security Deposit. It accumulates in a government-held account throughout the contract.

The total Security Deposit ceiling is typically capped at a percentage of the contract value (5-10 percent, matching or supplementing the PBG). Once the cumulative SD reaches the cap, subsequent RA Bills are paid in full without further deductions.

The SD is distinct from but complementary to the PBG:

• PBG: submitted as a single bank guarantee at contract signing; covers the risk of contractor abandonment or failure to perform from the outset.
• SD: built up from RA Bill deductions; covers ongoing performance risk and provides a reserve for defect rectification costs.

Both PBG and SD are released after the Defect Liability Period expires without unresolved defects. The contractor must apply for release of the SD with a completion certificate and confirmation that the DLP has elapsed without defect claims.

Why it matters for bidders

Security Deposit deductions reduce the net cash received from each RA Bill. A contractor submitting a Rs 2 crore RA Bill under a CPWD contract will receive Rs 1.95 crore (after 2.5 percent SD deduction), not Rs 2 crore. Over a Rs 20 crore contract, this 2.5 percent SD retention ties up Rs 50 lakh until DLP expiry, which can be one to two years after physical completion.

This working capital cost is often underestimated in bid pricing. The SD money is essentially an interest-free loan from the contractor to the government for the duration of the contract plus DLP. In cost of capital terms, SD at 5 percent of contract value over a three-year DLP represents a meaningful financing cost that should be priced into overhead.

In some contracts, the contractor can submit a Bank Guarantee in lieu of SD deductions, the BG replaces the withheld cash, and RA Bills are paid in full. This option preserves working capital but requires bank guarantee limits.

Example

A contractor executes a Rs 15 crore hospital construction project under a state PWD contract that provides for 5 percent SD deduction from each RA Bill, up to a maximum of Rs 75 lakh (5 percent of contract value). RA Bills are submitted monthly. After 15 months, cumulative SD deductions reach Rs 75 lakh. From month 16 onwards, RA Bills are paid in full. The project is completed at month 24. The defect liability period runs for 12 months. At month 36, with no unresolved defects, the contractor applies for SD release. The Rs 75 lakh is released within 30 days.

Key rules / thresholds

• Typical SD deduction rate: 2.5 percent (CPWD contracts), 5 percent (many state PWD contracts).
• Maximum SD cap: typically 5-10 percent of contract value, once reached, no further deductions.
• SD accumulated in cash may alternatively be replaced by a BG for equivalent amount, at contractor's option.
• SD is released after DLP expiry with no pending defect claims or financial disputes.
• PBG and SD are parallel instruments, SD does not reduce the PBG requirement.