What is an abnormally low tender — and can you reject it?
An abnormally low tender is a total price too low to perform the work — an insolvency and claims risk rather than a bargain. And no, you should not reject it outright: the disciplined response, mirrored in EU and multilateral-development-bank rules, is to ask the bidder to explain, and reject only if the explanation fails.
Why explanation-first is the rule
Automatic rejection invites a challenge. A bidder may have a perfectly good reason to be cheaper — an existing site presence, plant already in the country, an innovative method, a strategic loss they have consciously decided to absorb. Rejecting them without asking is procedurally fragile and occasionally throws away a genuine advantage.
But accepting an abnormally low bid without scrutiny is worse. What you have bought is not a saving. It is a contractor who will run out of money halfway through, and a claims strategy dressed up as a price.
An unbalanced bid is a different disease
This distinction matters more than almost anything else in evaluation, and it is routinely missed.
An abnormally low bid has a total that is too low. An unbalanced bid has a plausible total with a gamed distribution: early items front-loaded to capture cash flow, or rates inflated on items the bidder believes are under-measured and will grow. The total looks fine. The shape of it does not.
They need different tests and they have different remedies, and conflating them is how bad awards get justified — either by rejecting something that was fine, or by accepting something that was not.
What to actually ask for
The explanation should be specific: the economics of the construction method, the technical solution, any exceptionally favourable conditions available to that bidder, and compliance with employment and safety obligations at the price offered.
A bidder who can answer that has earned the award. A bidder who cannot has told you something important, and told it to you before you signed rather than afterwards.
In the guides
Terms
References
- module: /modules/tender-management/ — SIGMA/OECD and MDB guidance on abnormally low tenders; FHWA guidance on unbalanced bids
Zepth is the construction project delivery platform — it runs construction, procurement and asset management on one record, and does the work: reading the drawings, reviewing the submittals, matching the invoices and flagging the risks, with a human sign-off on anything consequential.
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