Free Procurement Tool

Bid Bond & Bid Security Calculator

Quickly calculate the required Bid Bond amount (LKR), verify exact validity dates with mandatory 28-day SBD buffers, estimate bank commission fees, and check CIDA contractor grading limits for Sri Lankan public and private tenders.

1. Enter Tender & Guarantee Parameters

Estimated Contract / Bid Value (LKR)LKR 10,000,000.00

Rs.

Required Bid Security Rate (%)

National Procurement Agency (NPA) Guidelines typically specify between 1.0% and 2.0% of the bid estimate.

Tender Closing / Submission Date

Bid Validity Period

Security Buffer Beyond Bid Validity28 Days (Mandatory in SBD)

14 Days (Minimum)28 Days (CIDA/NPA Standard)60 Days (Extended)

Section 16 of NPA Guidelines requires the bid guarantee to remain valid for at least 28 days after the expiry of bid validity.

Guarantee Output

Total Bid Bond Amount

LKR 200,000.00

(Two Lakh Rupees Only)

Security Rate:2.0%

Total Duration:118 Days (90 + 28 buffer)

Guarantee Expiry Date:Mon, March 22, 2027

Est. Bank Issuance Fee (~1% p.a.):LKR 646.58

Est. Stamp Duty:LKR 1,000.00

Find Tenders in This Value Range

Important Sri Lanka Procurement Rule:

Always issue your bid guarantee strictly in the standard format provided in the tender document (Volume 1, Section IV). Do not alter the beneficiary name or dispute jurisdiction. A guarantee expiring even 1 day prior to the required date will cause mandatory bid rejection.

Contractor Eligibility Guide

CIDA Contractor Grading Financial Limits (Sri Lanka)

For construction and civil engineering tenders, your CIDA (ICTAD) grade determines whether your firm meets the financial eligibility threshold:

CIDA Grade	Maximum Project Value Limit	Typical Category Scope	Matching Tenders
C1	Over LKR 1,500 Million	National & Mega Infrastructure	View Civil Tenders →
C2	Up to LKR 1,500 Million	Large Scale Public Works	View Civil Tenders →
C3	Up to LKR 600 Million	Major Civil & Building Works	View Civil Tenders →
C4	Up to LKR 300 Million	Medium-Large Commercial Works	View Civil Tenders →
C5	Up to LKR 150 Million	Medium Projects	View Civil Tenders →
C6	Up to LKR 50 Million	Small-Medium Regional Works	View Civil Tenders →
C7	Up to LKR 25 Million	Small Works & Subcontracting	View Civil Tenders →
C8	Up to LKR 10 Million	Minor Community Projects	View Civil Tenders →
C9	Up to LKR 5 Million	Entry Level & Village Works	View Civil Tenders →

Frequently Asked Questions About Bid Bonds in Sri Lanka

What is the standard bid bond percentage in Sri Lanka?

Under Sri Lanka National Procurement Guidelines, the bid security amount usually falls between 1% and 2% of the estimated contract value. For high-value tenders, procuring entities frequently specify a fixed lump-sum amount rather than an open percentage.

Which banks are accepted for issuing bid guarantees?

Procuring entities require on-demand guarantees issued by commercial banks licensed by the Central Bank of Sri Lanka (CBSL) or the Construction Guarantee Fund (CGF). Foreign bank guarantees must be counter-guaranteed by a local licensed bank.

Why must the bid security be valid for 28 days beyond the bid validity?

Standard Bidding Documents (SBD) require this 28-day cushion so that the procuring entity has sufficient time to complete evaluation, issue the Letter of Acceptance, and request the Performance Bond before the bid security expires.

Can an insurance bond be used instead of a bank guarantee?

Some government institutions permit unconditional insurance bonds issued by insurers registered with the Insurance Regulatory Commission of Sri Lanka (IRCSL). However, you must verify Section 16 of the specific tender document to confirm whether insurance guarantees are permitted.