Lot-Based Bidding

Lot-Based Bidding is a procurement structuring technique where a buyer divides a single large requirement into distinct sub-contracts, or lots, each of which is tendered and evaluated independently so that several suppliers can share the business rather than one firm monopolising the entire contract.

What is Lot-Based Bidding?

When a procurement requirement is large, geographically dispersed, or spans multiple product categories, lot division allows the buyer to tailor competition for each segment. Bidders may offer for a single lot, multiple lots, or all lots; the buyer sets out in the bidding documents the rules for combining prices when evaluating multi-lot bids and specifies any maximum number of lots one firm may win. In EU procurement, the lots approach is actively encouraged to open competition to small and medium enterprises that could not compete for a whole contract. World Bank-financed projects use lot division for large works programmes spanning multiple regions or for goods contracts covering diverse product families.

Each lot is evaluated independently on price and technical compliance, giving the buyer flexibility to award different lots to different winners. Discounts offered for winning multiple lots (combination bids) are also evaluated to find the most economically advantageous overall combination. This differs from slice-and-package, which is a related but distinct structuring choice about how large a package to assemble for a single competitive process.

Why Lot-Based Bidding matters for bidders

Lots reduce the size threshold that a firm needs to cross to participate. A regional contractor that cannot mobilise for a national-scale programme can compete for one or two geographically proximate lots and win a viable contract. The strategic question is whether to bid selectively for lots you can deliver well, or to bid all lots and offer combination discounts in pursuit of a larger share. Firms that price combination discounts aggressively sometimes find they win more than they can execute. Understand your delivery capacity before you structure your multi-lot offer.

FAQ

Can a buyer award all lots to a single supplier?

Yes, if the evaluation rules permit it and one bidder offers the best evaluated price across all lots, including any combination discounts, the buyer may award the entire programme to that firm.

Must bidders provide separate bid security for each lot?

Typically yes, if bid security is required, each lot requires its own bond sized to that lot's estimated value. The bidding documents will specify the amount and format.

Are lots always independent, or can they have dependencies?

Lots are designed to be independently deliverable, but in some programmes a lot may share mobilisation costs or site access with adjacent lots. Any such interdependencies should be described in the bidding documents.