Answer · Tender terms explained

What is a two-envelope tender?

A two-envelope tender splits your bid into a technical part and a financial part, sealed apart. The buyer opens and evaluates the technical part first. Your price is opened later, and only if your technical part passes. A price in the technical part can make your bid non-responsive.

This page uses the World Bank's two-envelope works document (September 2025 edition). Your tender's own documents always decide.

Create your workspace Reviewed 04/11/26

How does it work?

The two parts are opened at different times. That stops price from affecting the technical marks.

  1. 1You submit an inner envelope for each part, inside an outer envelope.
  2. 2The employer opens the Technical Parts in public. The Financial Parts stay sealed in safe custody (ITB 25).
  3. 3It evaluates the Technical Parts.
  4. 4It tells bidders the technical results and holds a public opening of the Financial Parts (ITB 33).
  5. 5It evaluates the prices, then combines them with the technical results (ITB 40).

What goes in each part?

This list follows ITB 11. Your data sheet may add other documents.

Technical PartFinancial Part
Letter of Bid, Technical PartLetter of Bid, Financial Part
Bid security or Bid-Securing DeclarationSchedules, including the priced Bill of Quantities
Written authority for the person who signsAny alternative bid's Financial Part, if allowed
Eligibility and qualification evidence
Technical proposal and Local Labour Method Statement
The declaration on sexual exploitation, abuse and harassment

What is the mistake to avoid?

The Technical Part must not include information about the bid price (ITB 11). If it contains material financial information about the price, the bid is declared non-responsive. Check these places before you seal it.

  • The cover letter.
  • A summary table in the technical proposal.
  • A cash flow or a schedule with amounts.
  • A priced copy of the BOQ left in the wrong folder.
  • File names that state the price.

On an electronic portal, the parts are usually separate uploads. See how to submit an electronic bid.

Does it go by other names?

Yes. Some documents say two-bid system, or technical bid and price bid. Do not mix it up with a two-stage tender, which is a different process. Read how your own tender describes the steps.

How can Bidligence help?

When a tender's text states two envelopes, Bidligence treats it that way. It leaves the price out of the technical proposal and cover letter, and the Submission Guard reads the same rule. It reads this from the tender's wording, so check that it has understood your tender.

Questions

What happens to my price if my technical part fails?
In this document, your sealed price is returned unopened after the selection ends and the contract is signed (ITB 33).
Does the bid security go in the technical part?
Yes, in the World Bank document. Your own tender may differ, so check it.
Why do buyers use two envelopes?
It lets them judge quality before they see the price. This is common when the technical content carries real weight.

Sources

Rules and portals change. Check the tender’s own documents and the official source before you rely on any of this.

See how a live tender wants its bid packed

Create a free workspace and analyse a live tender with your welcome credits. Then check its submission format against the data sheet.

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